Datasheet STRS6401F, STRS6401 Datasheet (Allegro)

DISCONTINUED PRODUCT

— FOR REFERENCE ONLY

Data Sheet

28101

These devices are specifically designed to meet the requirements
for increased integration and reliability in off-line flyback (STR-S6401)
and forward (STR-S6401F) converters operating in a fixed-frequency
PWM mode. Each device incorporates the primary control and drive
circuits with an avalanche-rated power MOSFET. Crucial system
parameters such as switching frequency and maximum duty cycle are
fixed during manufacture. The STR-S6401 and STR-S6401F differ only
in their maximum duty cycle. Control circuit decoupling and layout are
optimized within each device.

Cycle-by-cycle and average-current limiting, soft start, under­voltage lockout with hysteresis, and thermal shutdown protect the
device during all normal and overload conditions. The performance and
reliability of these devices, and their variable-frequency counterparts,
has been proven in substantial volume production.

The requirements of high dielectric isolation and low transient
thermal impedance and steady-state thermal resistance are satisfied in
an over-molded, 9-pin single in-line power package. Similar off-line
switching regulators, with output ratings to 800 V at 5 A, are also
available.

FEATURES

■ PWM Flyback Conversion or Forward Conversion

■ Output Power to 250 W

■ Pulse-by-Pulse Current Limiting

■ Fixed-Frequency 100 kHz PWM

■ Avalanche-Rated Power MOSFET Switch

■ Soft Start

■ Internal Under-Voltage Lockout and Thermal Shutdown

■ Low External Component Count

■ Over-Molded SIP with Isolated Heat Spreader

Always order by complete part number:
STR-S6401 or STR-S6401F .

+

SOURCE

DRAIN

UVLO

SIGNAL

GROUND

V

IN

OVER-CURRENT

PROTECTION

Dwg. PK-003

SOFT

START

+

GATE

FDBK

PWM

POWER

GROUND

LATCH

REF.

123456789

OSC.

OFF-LINE SWITCHING REGULATORS

– WITH POWER MOSFET OUTPUT

ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VIN............................ 35 V

Drain-Source Voltage, VDS............... 500 V

Drain Current, I

D

continuous ................................... ±10 A

single pulse, tw ≤1 ms .................. ±40 A

Avalanche Energy, E

A

single pulse............................... 500 mJ

Gate-Source Voltage, VGS................ ±20 V

Gate-Drive Current Range,

IG................................. -0.7 A to +1.5 A

Over-Current Protection Voltage Range,

V

OCP

............................. -0.3 V to +4.0 V

Insulation RMS Voltage,

V

WM(RMS)

..................................... 2000 V

Package Power Dissipation,

PD........................................ See Graph

FET Channel Temperature, TJ...... +150°C

Internal Frame Temperature, TF... +125°C
Operating Temperature Range,

TA............................... -20°C to +125°C

Storage Temperature Range,

T

stg

............................. -30°C to +125°C

™

STR-S6401

AND

STR-S6401F

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

™

FUNCTIONAL BLOCK DIAGRAM

ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA

OSC.

S

Q

SOURCE

DRAIN

LATCH

1

2

UVLO

SIGNAL

GROUND

4

V

IN

OVER-CURRENT
PROTECTION

R

ton

REF.

7

6

8

Dwg. FK-003

SOFT

START

5

0.2 V

+

GATE

3

FDBK

9

PWM

POWER

GROUND

+

R

toff

R

60

40

20

20 60 100

3.2 W

140

LIMITED BY FRAME
TEMP. = +125°C MAX.

RECOMMENDED MAX.
FRAME TEMP. = +100°C

FREE AIR

62 W

0

TEMPERATURE in °C

ALLOWABLE PACKAGE POWER DISSIPATION in WATTS

MOUNTING SURFACE
TEMPERATURE

Dwg. GK-003

LIMITED
BY r

DS(on)

100

10

1.0

0.1

DRAIN-TO-SOURCE VOLTAGE in VOLTS

DRAIN CURRENT in AMPERES

Dwg. GK-004

0.3

3.0

30

3.0

10 30 100 300

LIMITED BY V max

DS

DC

NO HEAT SINK
NATURAL COOLING
T = +25°C

A

t = 10 ms SINGLE PULSE

w

t = 1 ms SINGLE PULSE

w

W
Copyright © 1994, Allegro MicroSystems, Inc.

ALLOWABLE AVALANCHE ENERGY

ELECTRICAL CHARACTERISTICS

at TA = +25°C, VIN = 17 V, voltage measurements are referenced to

Signal Ground (pin 8) (unless otherwise noted).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

On-State Voltage V

INT

Turn-on, increasing V

IN

14.4 16 17.6 V

Under-Voltage Lockout V

INQ

Turn-off, decreasing V

IN

8.4 9.4 10.4 V

FET Leakage Current I

DSS

VDS = 400 V – – 300 µA

FET ON Resistance r

DS(on)

VGS = 10 V, ID = 5 A – 0.5 0.6 Ω

Forward Transconductance g

fs

VGS = 10 V, ID = 5 A – 9.2 – S

FET Input Capacitance C

iss

VDS=10 V, VGS=0 V, f=1 MHz – 1800 – pF

Propagation Delay Time t

phl

Turn-on, 10% VGS to 10% V

DS

–60– ns

t

plh

Turn-off, 90% VGS to 90% V

DS

– 140 – ns

Oscillator Frequency f

osc

93 100 107 kHz

Maximum ON Time t

on

STR-S6401 5.1 5.7 6.5 µs
STR-S6401F 3.8 4.5 5.2 µs

Over-Current Threshold V

OCP(th)

160 200 240 mV

OCP Current I

OCP

-250 -400 -550 µA

Feedback Current I

FDBK

– -1.8 – mA

Soft Start Threshold Voltage V

SS(th)

– – 0.4 V

Soft Start Current I

SS

VSS = 0 V – -100 – µA

Power Ground Current I

PG

tw = 200 ns – -1.0 -1.5 A

Supply Current I

IN(ON)

Operating – 23 – mA

I

IN(OFF)

Start up, VIN = 12 V – – 500 µA

Insulation RMS Voltage V

WM(RMS)

All terminals simultaneous reference 2000 – – V
metal plate against backside

Thermal Resistance R

θJM

FET channel to mounting surface – 2.0 – °C/W

NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal.

Typical Data is for design information only.

600

400

200

0 60 100

140

100

STARTING CHANNEL TEMPERATURE in °C

ALLOWABLE AVALANCHE ENERGY in mJ

Dwg. GK-009

300

500

0

20 40 80 120 160

SINGLE PULSE
DRAIN CURRENT = 10 A
SUPPLY VOLTAGE = 50 V

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

™

TYPICAL CHARACTERISTICS

160

120

80

-20 40 80

120

60

AMBIENT TEMPERATURE in °C

OSCILLATOR FREQUENCY in kHz

Dwg. GK-005

100

140

40

0 20 60 100 140

300

200

100

-20 40 80

120

50

AMBIENT TEMPERATURE in °C

OVER-CURRENT THRESHOLD VOLTAGE in mV

Dwg. GK-007

150

250

0

0 20 60 100 140

35

25

15

0

15 25

35

10

INPUT VOLTAGE in VOLTS

OPERATING SUPPLY CURRENT in mA

Dwg. GK-006

20

30

5

510 203040

T = +100°C

A

T = +25°C

A

T = -20°C

A

V

INT

V

INQ

0

TYPICAL PWM FLYBACK CONVERSION USING STR-S6401

WARNING: lethal potentials are present. See text.

TYPICAL PWM FORWARD CONVERSION USING STR-S6401F

WARNING: lethal potentials are present. See text.

NC

1

2

4

7

8

5

39

6

+

VOLTAGE

SENSE

FULL-BRIDGE

RECTIFIER

AC INPUT

100 V/120 V

+ OUTPUT

– OUTPUT

+

+

+

Dwg. EK-003-1

STR-S6401F

NC

1

2

4

7

8

5

39

6

+

VOLTAGE

SENSE

FULL-BRIDGE

RECTIFIER

AC INPUT

100 V/120 V

+ OUTPUT

– OUTPUT

+

+

+

Dwg. EK-003

STR-S6401

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

™

NOTE: Exact body and lead configuration at vendor’s option within limits shown.

APPLICATIONS INFORMATION

WARNING —

These devices are designed to be operated at lethal voltages and energy levels.
Circuit designs that embody these components must conform with applicable safety requirements.
Precautions must be taken to prevent accidental contact with power-line potentials.
Do not connect grounded test equipment.

The use of an isolation transformer is recommended during circuit development and breadboarding.

The power MOSFET outputs of these devices are similar to the International Rectifier type IRFP448. These devices
feature an excellent combination of fast switching, ruggedized device design, low on-resistance, and cost effectiveness.

Recommended mounting hardware torque:

4.34 - 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm).

Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease:

Dow Corning 340, or equivalent

Dimensions in Inches

(for reference only)

0.276

±0.016

Dwg. MK-003-9 in

0.953

±0.008

0.610

±0.008

0.118

0.130

±0.008

ø

1.49

±0.012

0.016

0.100

±0.004

0.709

±0.008

0.216

±0.008

0.216

0.130

±0.004

0.026

+0.008
–0.004

0.177

±0.028

PACKAGE

CENTER

LEAD
CENTER

1

9

0.033

+0.008
–0.004

T REF.

M

Dimensions in Millimeters

(controlling dimensions)

NOTE: Exact body and lead configuration at vendor’s option within limits shown.

Dwg. MK-003-9 mm

24.2

±0.2

15.5

±0.2

3.0

3.3

±0.2

ø

23.0

±0.3

0.4

2.54

±0.1

18.0

±0.2

5.5

±0.2

7.0

±0.4

5.5

3.3

±0.1

0.65

+0.2
–0.1

4.5

±0.7

PACKAGE

CENTER

LEAD
CENTER

1

9

0.85

+0.2
–0.1

T REF

M

The products described here are manufactured in Japan by Sanken Electric Co.,

Ltd. for sale by Allegro MicroSystems, Inc.

Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. reserve the right to
make, from time to time, such departures from the detail specifications as may be
required to permit improvements in the design of their products.

The information included herein is believed to be accurate and reliable.
However, Sanken Electric Co., Ltd. and Allegro MicroSystems, Inc. assume no
responsibility for its use; nor for any infringements of patents or other rights of third
parties which may result from its use.

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

STR-S6401

AND

STR-S6401F

OFF-LINE
SWITCHING REGULATORS

115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 [phone]

™

POWER CONVERSION/POWER MANAGEMENT

SELECTION GUIDES

SWITCHING REGULATOR PMCMs

Part

Number* Application V

I

Max P

O

Power Switch

3002M 5 V Switching Regulator and a 7.0-33 V – – 500 mA Bipolar

9 V Switching Regulator† – 400 mA Bipolar

3004M 5 V Switching Regulator and 7.0-33 V – – 500 mA Bipolar

Dual 9 V Switching Regulator – 2 x 400 mA Bipolar

S5703 Quasi-Resonant Flyback Converter 110/120 V 140 W 500 V 6 A Bipolar

S5707 Quasi-Resonant Flyback Converter 85-265 V 90 W 850 V 6 A Bipolar

220/240V 140 W

S5708 Quasi-Resonant Flyback Converter 85-265 V 120 W 850 V 7.5 A Bipolar

220/240 V 180 W

F6624 Quasi-Resonant Flyback Converter 100/120 V 130 W 450 V 0.92 Ω MOSFET
F6626 Quasi-Resonant Flyback Converter 100/120 V 190 W 450 V 0.58 Ω MOSFET
F6628 Quasi-Resonant Flyback Converter 100/120 V 290 W 450 V 0.35 Ω MOSFET
F6652 Quasi-Resonant Flyback Converter 85-265 V 86 W 650 V 2.8 Ω MOSFET
F6653 Quasi-Resonant Flyback Converter 85-265 V 120 W 650 V 1.95 Ω MOSFET
F6654 Quasi-Resonant Flyback Converter 85-265 V 190 W 650 V 1.15 Ω MOSFET
F6656 Quasi-Resonant Flyback Converter 85-265 V 300 W 650 V 0.71 Ω MOSFET
F6672 Quasi-Resonant Flyback Converter 200/220 V 50 W 900 V 7.7 Ω MOSFET
F6674 Quasi-Resonant Flyback Converter 85-265 V 76 W 900 V 4.49 Ω MOSFET
F6676 Quasi-Resonant Flyback Converter 85-265 V 115 W 900 V 2.81 Ω MOSFET

S6703 Quasi-Resonant Flyback Converter 110/120V 140 W 500 V 6 A Bipolar

S6704 Quasi-Resonant Flyback Converter 110/120 V 100 W 500 V 5 A Bipolar

S6707 Quasi-Resonant Flyback converter 85-265 V 90 W 850 V 6 A Bipolar

220/240 V 140 W

S6708 Quasi-Resonant Flyback Converter 85-265 V 120 W 850 V 7.5 A Bipolar

220/240 V 180 W

S6709 Quasi-Resonant Flyback Converter 85-265 V 160 W 850 V 10 A Bipolar

220/240 V 220 W

8033S 3.3 V Switching Regulator 5.5-28 V – – 3 A Bipolar

8050S 5.0 V Switching Regulator 7.0-40 V – – 3 A Bipolar

8090S 9.0 V Switching Regulator 12-40V – – 3 A Bipolar

8120S 12 V Switching Regulator 15-40 V – – 3 A Bipolar

8150S 15 V Switching Regulator 18-40 V – – 3 A Bipolar

* Complete part number includes additional characters to indicate operating temperature range and/or package style.
† Also includes linear regulator output for 15.7 V at 1.0 A.

POWER CONVERSION/POWER MANAGEMENT

SELECTION GUIDES (CONTINUED)