SLIN-12E1Ax Series Datasheet by Bel Power Solutions

——[:"E] SLlN-12E1Ax RoHS Compl' Rev.l www.ballusa,com

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 1

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Features

Applications

Description

The SLIN-12E1Ax power modules are non-isolated dc-dc converters that can deliver up to 12A of output current.

These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14Vdc) and provide a precisely

regulated output voltage from 0.69Vdc to 5.5Vdc, programmable via an external resistor. Two new features

added with this family of products are the ability to externally tune the voltage control loop and frequency

synchronization. Other features include remote On/Off, adjustable output voltage, over current and over

temperature protection, power good and output voltage sequencing. The Tunable LoopTM, allows the user to

optimize the dynamic response of the converter to match the load with reduced amount of output capacitance

leading to savings on cost and PWB area.

Part Selection

Output Voltage Input Voltage

Max. Output

Current

Typical

Efficiency

Model

N

umber

Active High

Model

N

umber

Active Low

0.69 Vdc - 5.5 Vdc

4.5 Vdc - 14 Vdc 12 A 94.3% SLIN-12E1A0 SLIN-12E1AL

Notes: 1. Add “R” suffix at the end of the model number to indicate tape and reel packaging (Standard).

2. Add “G” suffix at the end of the model number to indicate tray packaging (Option).

 Wide Input Voltage Range  Ability to Sink and Source Current

 Fixed Switching Frequency  Cost Efficient Open Frame Design

 Power Good Signal  Over Temperature Protection

 Remote Sense  Output Over Current Protection

 Remote On/Off

 Tunable LoopTM (a registered trademark of Lineage Power Systems) to

Optimize Dynamic output voltage response

 Flexible output voltage sequencing

 Fixed switching frequency and ability to synchronize with external clock

 Class 2, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592A)

 Compliant to RoHS EU Directive 2002/95/EC

 Compatible in a Pb-free or SnPb reflow environment

 Certificated to UL60950-1/CSA C22.2 No.60950-1, 2rd

 VDE

‡

0805:2001-12 (EN60950-1) Licensed

 Distributed power architectures  Servers and storage applications

 Intermediate bus voltage applications  Networking equipment

 Telecommunications equipment  Industrial equipment

S

LIN

-

12

E1Ax

RoHS Compliant

Rev.

I

IUD ,_ 2 I75 If“ _‘ |> IO www.bellusa,com

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 2

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Part Number Explanation

S LIN – 12 E 1A 0

1 2 3 4 5 6

1

---

Surface mount

5

---

With sequencing

2

---

Series code

6

---

Enable, active high, change “0” to “L” means active low

3

---

Output current (12A)

7

---

Package

4

---

Wide input voltage range (4.5

-

14V)

Absolute Maximum Ratings

Parameter Min Typ Max

Unit

Notes

Continuous Input Voltage -0.3 - 15 V

Voltage on SEQ terminal -0.3 - Vin V

Voltage on SYNC terminal -0.3 - 12 v

Voltage on PG terminal -0.3 - 6 V

Operating Ambient Temperature -40 - 85 C

Storage Temperature -55 - 125 C

Altitude - - 2000 m

Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These

are absolute stress ratings only, functional operation of the device is not implied at these or any other

conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute

maximum ratings for extended periods can adversely affect the device reliability.

Input Specifications

Parameter

Min

Typ

Max

Unit

Notes

Operating Input Voltage 4.5 - 14 V

Input Current (full load) - - 11.5 A VIN=4.5V to 14V

Input Current (no load) - 26 - mA Vo=0.69V, VIN=10V, IO=0, module enabled

- 60 - mA Vo=3.3V, VIN=12V, IO=0, module enabled

Input Stand-by Current - 1.2 - mA VIN = 12V, module disabled

Input Reflected Ripple Current

(pk-pk) - 70 - mA 5Hz to 20MHz, 1μH source impedance; VIN

=0 to 14V, IO= IOmax

I2t Inrush Current Transient - - 1 A2s

Input Ripple Rejection (120Hz) - 45 - dB

Turn-on Threshold - 4.45 - V

Turn-off Threshold - 4.2 - V

Hysteresis - 0.25 - V

CAUTION: This converter is not internally fused. An input line fuse must be used in application.

This power module can be used in a wide variety of applications, ranging from simple standalone operation to

an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not

included; however, to achieve maximum safety and system protection, always use an input line fuse. The safety

agencies require a fast-acting fuse with a maximum rating of 15A. Based on the information provided in this

data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be

used. Refer to the fuse manufacturer’s data sheet for further information.

Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and

temperature conditions.

www elluse om

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 3

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Output Specifications

Parameter

Min

Typ

Max

Unit

Notes

Output Voltage Set Point -1.5 - +1.5

%Vo,set

with 0.5% tolerance for external resistor used to

set output voltage

Output Voltage -2.5 - +2.5 %Vo,set

Over all operating input voltage, resistive load,

and temperature conditions until end of life

Adjustment Range1 0.69 - 5.5 V selected by an external resistor

Remote Sense Range - - 0.5 V

Load Regulation

VO ≥ 2.5V

VO < 2.5V

-

10

5

mV

IO=IO, min to IO, max

Line Regulation

VO ≥ 2.5V

VO < 2.5V

-

0.4

10

%Vo,set

mV

VIN=VIN, min to VIN, max

Temperature

Regulation

(-40°C to +85°C) - - 0.5 %Vo,set

VO < 2.5V, Tref=TA, min to TA, max

Ripple and Noise (pk-pk) - 65 80 mV 5Hz to 20MHz BW, VIN=VIN, nom and IO=IO, min to

IO, max Co = 0.1μF // 10 μF ceramic capacitors)

Ripple and Noise (rms) - 23 28 mV

Output Current Range 0 - 12 A

Output DC Current Limit - 150 - %Io,max

Hiccup Mode

Output Short-Circuit Current - 2 - A Vo≤250mV, Hiccup Mode

Output Capacitance

2

ESR≥ 1 mΩ

ESR≥0.15 mΩ

ESR≥ 10 mΩ

0

-

100

1000

5000

uF

Without the Tunable LoopTM

With the Tunable LoopTM

Turn-On Delay Time

- 2 - mS

Case 1: On/Off input is enabled and then input

power is applied (delay from instant at which

VIN = VIN, min until Vo =10% of Vo, set)

- 2 - mS

Case 2: Input power is applied for at least one

second and then the On/Off input is enabled

(delay from instant at which Von/Off is enabled

until Vo =10% of Vo, set)

Output voltage Rise time - 5 - mS time for Vo to rise from 10% of Vo, set to 90%

of Vo, set

Output voltage overshoot - - 3 %Vo,set

Vin=Vin, min to Vin, max, Io=Io, min to Io, max,

With or without maximum external capacitance

Dynamic Load Response

△V50%~100%

of Max Load

Overshoot - 360

- mV

di/dt=1A/us, Vin=Vin,nom, Ta=25°C, with a

1µF ceramic capacitor and a 10µF ceramic

capacitor.

Settling Time - 50 - uS

△V100%~50%

of Max Load

Overshoot - 400 - mV

Settling Time - 50 - uS

Notes: 1. Some output voltages may not be possible depending on the input voltage.

2. External capacitors may require using the new Tunable LoopTM feature to ensure that the module is

stable as well as getting the best transient response (See the Tunable LoopTM section for details).

3. Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and

temperature conditions.

www elluse om

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 4

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

General Specifications

Parameter

Min

Typ

Max

Unit

Notes

Efficiency

Vo=0.69V

Vo=1.2V

Vo=1.8V

Vo=2.5V

Vo=3.3V

Vo=5.0V

-

76.0

83.0

87.6

90.2

92.2

94.3

-

%

Vin= 12Vdc, Ta=25°C

Io=Io, max , Vo= Vo,set

(for Vo=0.69V, Vin=10Vdc)

Switching Frequency - 500 - kHz

Over Temperature Protection - 133 - C

Sequencing Delay time 10 - - mS Delay from VIN, min to application of

voltage on SEQ pin

Tracking Accuracy

Power-Up: 0.5V/ms

Power-Down: 0.5V/ms

-

100

150

mV

Vin, min to Vin, max; Io, min to Io,

max, Vseq < Vo

PGOOD (Power Good)

Output Voltage Limit for PGOOD

Pulldown resistance of PGOOD pin

89.1

-

7

110.8

50

%Vo,set

Ω

Signal Interface Open Drain,

Vsupply  6Vdc

Weight - 3.68 - g

MTBF 16,250,892 hours

Calculated Per Telcordia Issue 2

Method 1 Case 3 (Io=0.8Io, max,

Ta=40°C)

Dimensions

Inches (L × W × H)

Millimeters (L × W × H)

0.80 x 0.45 x 0.334

20.32 x 11.43 x 8.5

-

Frequency Synchronization

Synchronization Frequency Range 520 - 600 KHz

High-Level Input Voltage 2.5 - - V

Low-Level Input Voltage - - 0.8 V

Input Current, SYNC - - 1 mA

Minimum Pulse Width, SYNC 250 - - nS

Minimum Setup/Hold Time, SYNC

250 - - nS

Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and

temperature conditions.

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 5

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Efficiency Data

EFFICIENCY,  (%)

70

75

80

85

90

0 2 4 6 8 10 12

Vin=10V

Vin=5V

Vin=4.5V

EFFICIENCY,  (%)

70

75

80

85

90

95

0 2 4 6 8 10 12

Vin=14V

Vin=12V

Vin=4.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Vo=0.69V Vo=1.2V

EFFICIENCY,  (%))

70

75

80

85

90

95

100

0 2 4 6 8 10 12

Vin=14V

Vin=12V

Vin=4.5V

EFFICIENCY,  (%)

70

75

80

85

90

95

100

0 2 4 6 8 10 12

Vin=14V

Vin=12V

Vin=4.5V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Vo=1.8V Vo=2.5V

EFFICIENCY,  (%))

70

75

80

85

90

95

100

0 2 4 6 8 10 12

Vin=14V

Vin=12V

Vin=5V

EFFICIENCY,  (%)

80

85

90

95

100

0 2 4 6 8 10 12

Vin=14V

Vin=12V

Vin=7V

OUTPUT CURRENT, IO (A) OUTPUT CURRENT, IO (A)

Vo=3.3V Vo=5.0V

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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 6

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Thermal Derating Curves

OUTPUT CURRENT, Io (A)

AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC

Vo=0.69V

Vo=1.2V

OUTPUT CURRENT, Io (A)

AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC

Vo=1.8V Vo=2.5V

OUTPUT CURRENT, Io (A)

AMBIENT TEMPERATURE, TA OC AMBIENT TEMPERATURE, TA OC

Vo=3.3V Vo=5.0V

4

6

8

10

12

55

65

75

85

45

35

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

4

6

8

10

12

14

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

1.5m/s

(300LFM)

55

65

75

85

45

35

4

6

8

10

12

14

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

1.5m/s

(300LFM)

55

65

75

85

45

3

5

3

5

7

9

11

13

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

1.5m/s

(300LFM)

55

65

75

85

45

35

3

5

7

9

11

13

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

1.5m/s

(300LFM)

2m/s

(400LFM)

55

65

75

85453

5

3

5

7

9

11

13

NC

0.5m/s

(100LFM)

1m/s

(200LFM)

1.5m/s

(300LFM)

2m/s

(400LFM)

55

65

75

85

45

35

25

.WW rww'www ’\/\_/\ WWW—WM JWVVVM “AﬁuxMh/Nﬂﬂﬂﬂ uuvvv‘ \X\l\\/f\j\ www.bellusa,com

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 7

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Ripple and Noise Waveforms

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT VOLTAGE

VO (V) (20mV/div)

TIME, t (1s/div) TIME, t (1s/div)

Vin=12V, Vo=0.69V, Io = Io,max Vin=12V, Vo=1.2V, Io = Io,max

OUTPUT VOLTAGE

V

O

(V) (20mV/div)

OUTPUT VOLTAGE

VO (V) (20mV/div)

TIME, t (1s/div) TIME, t (1s/div)

Vin=12V, Vo=1.8V, Io = Io,max Vin=12V, Vo=2.5V, Io = Io,max

OUTPUT VOLTAGE

VO (V) (20mV/div)

OUTPUT VOLTAGE

V

O

(V) (20mV/div)

TIME, t (1s/div) TIME, t (1s/div)

Vin=12V, Vo=3.3V, Io = Io,max Vin=12V, Vo=5.0V, Io = Io,max

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 8

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Transient Response Waveforms

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (5A/div) VO (V) (200mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (5A/div) VO (V) (200mV/div)

TIME, t (100s /div) TIME, t (100s /div)

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=0.69V

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=1.2V

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (5A/div) V

O

(V) (200mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (5A/div) VO (V) (200mV/div)

TIME, t (100s /div) TIME, t (100s /div)

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=1.8V

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=2.5V

OUTPUT CURRENT, OUTPUT VOLTAGE

IO (A) (5A/div) VO (V) (200mV/div)

OUTPUT CURRENT, OUTPUT VOLTAGE

I

O

(A) (5A/div) V

O

(V) (200mV/div)

TIME, t (100s /div) TIME, t (100s /div)

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=3.3V

Transient Response to Dynamic Load Change from

0% to 50% to 0%. Vo=5.0V

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 9

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Startup Time

ON/OFF VOLTAGE OUTPUT VOLTAGE

VON/OFF (V) (2V/div) VO (V) (200mV/div)

ON/OFF VOLTAGE OUTPUT VOLTAGE

VON/OFF (V) (2V/div) VO (V) (500mV/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using On/Off Voltage (Io = Io,max), Vo=0.69V Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V

ON/OFF VOLTAGE OUTPUT VOLTAGE

V

ON/OFF

(V) (2V/div) V

O

(V) (500mV/div)

ON/OFF VOLTAGE OUTPUT VOLTAGE

VON/OFF (V) (1V/div) VO (V) (1V/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V

ON/OFF VOLTAGE OUTPUT VOLTAGE

VON/OFF (V) (2V/div) VO (V) (1V/div)

ON/OFF VOLTAGE OUTPUT VOLTAGE

V

ON/OFF

(V) (2V/div) V

O

(V) (2V/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V Start-up Using On/Off Voltage (Io = Io,max), Vo=5.0V

A (h: r— e K /— :r—w r“ /— I

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com

10

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Startup Time (continued)

INPUT VOLTAGE OUTPUT VOLTAGE

VIN (V) (5V/div) VO (V) (200mV/div)

INPUT VOLTAGE OUTPUT VOLTAGE

VIN (V) (5V/div) VO (V) (500mV/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using Input Voltage (VIN = 10V, Io = Io,max ),

Vo=0.69V

Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),

Vo=1.2V

INPUT VOLTAGE OUTPUT VOLTAGE

V

IN

(V) (5V/div) V

O

(V) (500mV/div)

INPUT VOLTAGE OUTPUT VOLTAGE

VIN (V) (5V/div) VO (V) (1V/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),

Vo=1.8V

Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),

Vo=2.5V

INPUT VOLTAGE OUTPUT VOLTAGE

VIN (V) (5V/div) VO (V) (1V/div)

INPUT VOLTAGE OUTPUT VOLTAGE

V

IN

(V) (5V/div) V

O

(V) (2V/div)

TIME, t (1 ms/div) TIME, t (1 ms/div)

Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),

Vo=3.3V

Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),

Vo=5.0V

4“”? c mod lesws'ance W o a T LAM—AN - M M. mm n www bewsemm

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com

11

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Test Configurations

Input Reflected Ripple Current Test Setup.

TO OSCILLOSCOPE CURRENT PROBE

LTEST

1μH

BATTERY

CS 1000μF

Electrolytic

E.S.R.<0.1

@ 20°C 100kHz

2x100μF

Tantalum

VIN(+)

COM

NOTE: Measure input reflected ripple current with a simulated

source inductance (LTEST) of 1μH. Capacitor CS offsets

possible battery impedance. Measure current as shown

above.

C

IN

Output Ripple and Noise Test Setup

NOTE: All voltage measurements to be taken at the module

terminals, as shown above . If sockets are used then

Kelvin connections are required at the mo

dule terminals

to avoid measurement errors due to socket contact

resistance.

Vo+

COM

0.1uF

RESISTIVE

LOAD

SCOPE USING

BNC SOCKET

COPPER STRIP

GROUND PLANE

10uF

Output Voltage and Efficiency Test Setup

VO

COM

VIN(+)

COM

RLOAD

Rcontact

Rdistribution

Rcontact

Rdistribution

Rcontact

Rdistribution

VIN VO

NOTE: All voltage measurements to be taken at the module

terminals, as shown above. If sockets are used then

Kelvin connections are required at the module terminals

to avoid measurement errors due to socket contact

resistance.



=

VO.

IO

VIN.

IIN

x 100

%

Efficiency

Ana—>55 uw§o> Ban—E “:9: www. be‘fusexmm

Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302  Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com

12

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Input Filtering

The SLIN-12E1Ax should be connected to a low ac-impedance source. A highly inductive source can affect

the stability of the module. Input capacitance must be placed directly adjacent to the input pin of the module,

to minimize input ripple voltage and ensure module stability.

To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. The figure

below shows the input ripple voltage for various output voltages at 12A of load current with 1x22 µF or 2x22 µF

ceramic capacitors and an input of 12V.

In

put Ripple Voltage (mVp

-

p)

0

50

100

150

200

250

300

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

1x22uF

2x22uF

Output Voltage (Vdc)

Note: Input ripple voltage for various output voltages with 1x22 µF or 2x22 µF ceramic capacitors at the input

(12A load). Input voltage is 12V.

Output Filtering

The SLIN-12E1Ax modules are designed for low output ripple voltage and will meet the maximum output ripple

specification with 0.1 µF ceramic and 10 µF ceramic capacitors at the output of the module. However, additional

output filtering may be required by the system designer for a number of reasons. First, there may be a need to

further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may

need to be customized to a particular load step change.

To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at

the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic

response of the module. The figure on the next page provides output ripple information for different external

capacitance values at various Vo and for a load current of 12A. For stable operation of the module, limit the

capacitance to less than the maximum output capacitance as specified in the electrical specification table.

Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this

data sheet.

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Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Output Filtering (continued)

0

10

20

30

40

50

60

70

0.5 1.5 2.5 3.5 4.5 5.5

Output Voltage(Volts)

Ripple(mVp-p)

1x10uF External Cap

1x47uF External Cap

2x47uF External cap

4x47uF External Cap

Note: Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF

ceramic capacitors at the output (12A load). Input voltage is 12V.

Safety Considerations

For safety agency approval the power module must be installed in compliance with the spacing and separation

requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE

0850:2001-12 (EN60950-1) Licensed.

For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the input

must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs are ELV.

The input to these units is to be provided with a fast-acting fuse with a maximum rating of 15A in the positive

input lead.

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Remote On/Off

Parameter

Min

Typ

Max

Unit

Notes

Signal Low (Unit On) Active Low

0 - 1 V The remote on/off pin open, Unit on.

Signal High (Unit Off) 2.0 - Vin,max V

Signal Low (Unit Off) Active High

- - 3.5 V The remote on/off pin open, Unit on.

Signal High (Unit On) Vin-1 - Vin,max V

The SLIN-12E1Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are

available. In the Positive Logic On/Off option, the module turns ON during a logic High on the On/Off pin and

turns OFF during a logic Low. With the Negative Logic On/Off option, the module turns OFF during logic High

and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option,

leaving the On/Off pin disconnected will turn the module ON when input voltage is present.

For positive logic modules, the circuit configuration for using the On/Off pin is shown in the figure below. When

the external transistor Q1 is in the OFF state, the internal PWM Enable signal is pulled high through an internal

24.9k resistor and the external pullup resistor and the module is ON. When transistor Q1 is turned ON, the

On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is 20k.

Circuit configuration for using positive On/Off logic

For negative logic On/Off modules, the circuit configuration is shown below. The On/Off pin should be pulled high

with an external pull-up resistor (suggested value for the 4.5V to 14V input range is 20Kohms). When transistor

Q1 is in the OFF state, the On/Off pin is pulled high, internal transistor Q2 is turned ON and the module is OFF.

To turn the module ON, Q1 is turned ON pulling the On/Off pin low, turning transistor Q2 OFF resulting in the

PWM Enable pin going high and the module turning ON.

Circuit configuration for using negative On/Off logic

25.5K

Q1

ON/OFF

VIN+

GND

_

+

PWM Enable

V

ON/OFF

MODULE

I

Rpullup1

ON/OFF

22K

Q2

23K

11.8K

23K

I

ON/OFF

25.5K

Q1

GND

ON/OFF

VIN+

_

+

PWM Enable

V

ON/OFF

MODULE

Rpullup

22K

Q3

22K

11.8K

Q2

22K

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Over Current Protection

To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting

circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters hiccup

mode. The unit operates normally once the output current is brought back into its specified range.

Over Temperature Protection

To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will

shutdown if the over temperature threshold of 133°C is exceeded at the thermal reference point Tref . The

thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once

the unit goes into thermal shutdown it will then wait to cool before attempting to restart.

Input Under-voltage Lockout

At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will

begin to operate at an input voltage above the under voltage lockout turn-on threshold.

Output Voltage Programming

The output voltage of the SLIN-12E1Ax modules can be programmed to any voltage from 0.69Vdc to 5.5Vdc by

connecting a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output

voltage set point depending on the input voltage. These are shown below. The Limit curve shows that for output

voltages of 0.9V and lower, the input voltage must be lower than the maximum of 14V. The Lower Limit curve

shows that for output voltages of 3.3V and higher, the input voltage needs to be larger than the minimum of 4.5V.

0

2

4

6

8

10

12

14

16

0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6

Output Voltage (V)

Input Voltage (v)

Lower Limit

Upper Limit

Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for

different input voltages.

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Output Trim Equations

Without an external resistor between Trim and GND pins, the output of the module will be 0.69Vdc. To calculate

the value of the trim resistor, Rtrim for a desired output voltage, use the following equation:

 

















k

Vo

Rtrim

69.0

9.6

Rtrim is the external resistor in kΩ

Vo is the desired output voltage.

Table 1 provides Rtrim values required for some common output voltages.

Table 1

V

O, set

(V)

Rtrim (

KΩ)

0.7 690

1.0 22.26

1.2 13.53

1.5 8.519

1.8 6.216

2.5 3.812

3.3 2.644

5.0 1.601

By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved

as specified in the electrical specification.

Remote Sense

The SLIN-12E1Ax power modules have a Remote Sense feature to minimize the effects of distribution losses by

regulating the voltage between the VS+ and VS– pins. The voltage between the VS– and GND pins of the

module must not drop below –0.2V. If Remote Sense is being used, the voltage between VS+ and VS– cannot

be more than 0.5V larger than the voltage between VOUT and GND. Note that the output voltage of the module

cannot exceed the specified maximum value. When the Remote Sense feature is not being used, connect the

VS+ pin to the VOUT pin and the VS– pin to the GND pin.

Circuit configuration for programming output voltage using an external resistor

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Startup into Pre-biased Output

The SLIN-12E1Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the

set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.

Voltage Margining

Output voltage margining can be implemented in the SLIN-12E1Ax modules by connecting a resistor, Rmargin-up,

from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down,

from the Trim pin to output pin for margining-down.

Vo

MODULE

GND

Trim

Q1

Rtrim

Rmargin-up

Q2

Rmargin-down

Circuit Configuration for margining Output voltage

Monotonic Start-up and Shutdown

The SLIN-12E1Ax modules have monotonic start-up and shutdown behavior for any combination of rated input

voltage, output current and operating temperature range.

Output Voltage Sequencing

The SLIN-12E1Ax modules include a sequencing feature that enables users to implement various types of output

voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When not using

the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected.

When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches

the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the

module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting

multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ pin.

For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left

unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the

module is ON by default.

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Output Voltage Sequencing (continued)

After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the

SEQ pin. During this time, a voltage of 50mV (± 20 mV) is maintained on the SEQ pin.

This can be done by applying the sequencing voltage through a resistor R1connected in series with the SEQ pin.

This delay gives the module enough time to complete its internal power-up soft-start cycle. During the delay time,

the SEQ pin should be held close to ground (nominally 50mV ± 20 mV). This is required to keep the internal op-

amp out of saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting

resistor R1 according to the following equation:

05.0

24950

1



IN

V

R

The voltage at the sequencing pin will be 50mV when the sequencing signal is at zero.

R1

GND

VIN+

SEQ

+

-

OUT

10K

499K

MODULE

Circuit showing connection of the sequencing signal to the SEQ pin

After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will

track this voltage on a one-to-one volt basis until the output reaches the set-point voltage. To initiate

simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output

voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input

voltage must be maintained until the tracking and output voltages reach ground potential.

When using the sequencing feature to control start-up of the module, pre-bias immunity during start-up is

disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during start-

up. When using the sequencing feature, modules goes through an internal set-up time of 10msec, and will be in

synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module sinking

current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during start-up is

required, the sequencing feature must be disabled. For additional guidelines on using the sequencing feature

please contact the Bel Power technical representative for additional information.

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Power Good

The SLIN-12E1Ax modules provide a Power Good (PGOOD) signal that is implemented with an open-drain

output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal

will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation

occurs that would result in the output voltage going ±11% outside the set point value. The PGOOD terminal

should be connected through a pull-up resistor (suggested value 100K) to a source of 6VDC or less.

Synchronization

The SLIN-12E1Ax modules can be synchronized using an external signal. Details of the SYNC signal are

provided in the Electrical Specifications table. If the synchronization function is not being used, leave the SYNC

pin floating.

Tunable LoopTM

The SLIN-12E1Ax modules have a new feature that optimizes transient response of the module called Tunable

LoopTM.

External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and

noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load

current changes. Adding external capacitance however affects the voltage control loop of the module, typically

causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause

the module to become unstable.

The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network

connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C between

the SENSE and TRIM pins of the module, as shown below. This R-C allows the user to externally adjust the

voltage loop feedback compensation of the module.

MODULE

VOUT

SENSE

TRIM

GND

RTUNE

CTUNE

RTrim

C O

Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module

Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in Tables 2 and 3.

Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output capacitors up

to 940uF that might be needed for an application to meet output ripple and noise requirements. Selecting RTUNE

and CTUNE according to Table 2 will ensure stable operation of the module.

In applications with tight output voltage limits in the presence of dynamic current loading, additional output

capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output

voltage deviation limits for some common output voltages in the presence of a 6A to 12A step change (50% of

full load), with an input voltage of 12V.

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Tunable LoopTM (Continued)

Table 2.General recommended values of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor

combinations.

Co 1x47F

2x47F 4x47F

10x47F

20x47F

RTUNE 470 270 150 150 150

CTUNE 1000pF

3300pF 4700pF

8200pF

12nF

Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of 2% of Vout for a 6A step load

with Vin=12V.

Vo 5V 3.3V 2.5V 1.8V 1.2V 0.69V

Co 4x47F

1x47F + 330

F

Polymer

2x47F + 330F

Polymer

6x47F + 330F

Polymer

6x47F + 2x330F

Polymer

4x47F + 6x330

F

Polymer

R

TUNE

270 220 220 220 150 150

CTUNE 3300pF

4700pF 6800pF 18nF 33nF 100nF



V

91mV 60mV 47mV 35mV 23mV 12mV

Thermal Considerations

Power modules operate in a variety of thermal environments; however, sufficient cooling should always be

provided to help ensure reliable operation.

Considerations include ambient temperature, airflow, module power dissipation, and the need for increased

reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The

thermal data presented here is based on physical measurements taken in a wind tunnel. The test set-up is

shown below.

Air

flow

x

Power Module

Wind Tunnel

PWBs

12.7_

(0.50)

76.2_

(3.0)

Probe Location

for measuring

airflow and

ambient

temperature

25.4_

(1.0)

Thermal Test Setup

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Thermal Considerations (continued)

The preferred airflow direction and the thermal reference points, Tref, used in the specifications are also shown

below. For reliable operation the temperatures at these points should not exceed 125oC. The output power of the

module should not exceed the rated power of the module (Vo,set x Io,max). The derating data applies to airflow

in either direction of the module’s short axis.

Preferred airflow direction and location of hot-spot of the module (Tref).

Example Application Circuit

Requirements:

Vin: 12V

Vout: 1.8V

Iout: 9.0A max., worst case load transient is from 6A to 9A

Vout: 1.5% of Vout (27mV) for worst case load transient

Vin, ripple 1.5% of Vin (180mV, p-p)

MODULE

VOUT

VS+

GND

TRIM

RTUNE

CTUNE

RTrim

VIN

CO1

+

CI1 CI2

Vin+ Vout+

ON/OFF

Q1

VS-

+

CO2

CI1 22F/16V ceramic capacitor (e.g. Murata GRM32ER61C226KE20)

CI2 100F/16V bulk electrolytic

CO1 6 x 47F/6.3V ceramic capacitor (e.g. Murata GRM31CR60J476ME19)

CO2 330F/6.3V Polymer (e.g. Sanyo, Poscap)

CTune 15nF ceramic capacitor (can be 1206, 0805 or 0603 size)

RTune 150 ohms SMT resistor (can be 1206, 0805 or 0603 size)

RTrim 6.19k SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)

Tref

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Mechanical Outline

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Mechanical Outline (continued)

Recommended Pad Layout

Dimensions are in millimeters and (inches).

Tolerances: x.x mm  0.5 mm (x.xx in.  0.02 in.) [unless otherwise indicated]

x.xx mm  0.25 mm (x.xxx in  0.010 in.)

Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be soldered

using a reflow profile with a peak temperature of no more than 260 ºC for less than 5 seconds.

FUNCTION

1 ON/OFF

2 VIN

3 SEQ

4 GND

5

TRIM

6 VOUT

7 VS+

8 VS-

9 PG

10

SYNC

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Packaging Details

The SLIN-12E1Ax modules are supplied in tape & reel as standard.

All Dimensions are in millimeters and (in inches).

Reel Dimensions:

Outside Dimensions: 330.2 mm (13.00’’)

Inside Dimensions: 177.8 mm (7.00”)

Tape Width: 44.00 mm (1.732”)

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Surface Mount Information

Pick and Place

The SLIN-12E1Ax modules use an open frame construction and are designed for a fully automated assembly

process. The modules are fitted with a label designed to provide a large surface area for pick and place

operations. The label meets all the requirements for surface mount processing, as well as safety standards, and

is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part

number and serial number.

Nozzle Recommendations

The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle size,

tip style, vacuum pressure and placement speed should be considered to optimize this process. The minimum

recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer diameter, which

will safely fit within the allowable component spacing, is 7 mm.

Lead Free Soldering

The SLIN-12E1Ax modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free

soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the

modules and can adversely affect long-term reliability.

Pb-Free Reflow Profile

Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic

Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This

standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of the

package. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile using

Sn/Ag/Cu solder is shown in the figure below. Soldering outside of the recommended profile requires testing to

verify results and performance.

MSL Rating

The SLIN-12E1Ax modules have a MSL rating of 2A.

Storage and Handling

The recommended storage environment and handling procedures for moisture-sensitive surface mount packages

is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive Surface

Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or greater. These

sealed packages should not be broken until time of use. Once the original package is broken, the floor life of the

product at conditions of  30°C and 60% relative humidity varies according to the MSL rating (see J-STD-033A).

The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag seal date, when stored

at the following conditions: < 40° C, < 90% relative humidity.

Per J-STD-020 Re v. C

0

50

100

150

200

250

300

Reflow Time (Se conds)

Reflow Temp (°C)

He ating Zone

1°C/Second

Peak Temp 260°C

* Min. Time Above 235°C

15 Se conds

*Time Above 217°C

60 Seconds

Cooling

Zone

Recommended linear reflow profile using Sn/Ag/Cu solder.

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

2015 Bel Fuse Inc. Specifications subject to change without notice. 072915

26

CORPORATE FAR EAST EUROPE

Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.

206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre

Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston

Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K.

Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601

www.belfuse.com Fax 852-2352-3706 Fax 44-1772-888366

www.belfuse.com www.belfuse.com

NON-ISOLATED DC/DC CONVERTERS

4.5 Vdc - 14 Vdc Input, 0.69 Vdc - 5.5 Vdc /12 A Outputs

Jul. 29, 2015 Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.

Post Solder Cleaning and Drying Considerations

Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The

result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of

the finished circuit-board assembly.

Revision History

Date Revision Changes Detail Approval

2009-6-1 A First release T. Bubriski

2009-6-25 B Section “Surface Mount Information” added. T. Bubriski

2009-9-1 C Tunable LoopTM logo added. T. Bubriski

2009-10-8 D Updated Startup Time waveforms on page 10. T. Bubriski

2009-11-5 E Corrected I/P Reflected Ripple Current. T. Bubriski

2010-1-20 F Updated Remote ON/OFF section on page 14. T. Bubriski

2010-11-5 G Updated Thermal Derating Curves on page 6. T. Bubriski

2010-12-2 H

Updated

Output Voltage Limit for PGOOD

and MTBF on page 4 and

Power Good section on page 19. T. Bubriski

2015-7-29 I

Update UL in features, update part Selection,part number explanation,

absolute maximum ratings, MSL rating, add label in mechanical

outline. XF Jiang

RoHS Compliance

Complies with the European Directive 2011/65/EU, calling for the elimination of lead and

other hazardous substances from electronic products.

SLIN-12E1Ax Series Datasheet by Bel Power Solutions

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