Datasheet STRS6525 Datasheet (Allegro)

DRAIN

SOURCE

COMMON

SYNC

V

Data Sheet

28102.11

STR-S6525

OFF-LINE SWITCHING REGULATOR

– WITH POWER MOSFET OUTPUT

The STR-S6525 is specifically designed to meet the requirement

for increased integration and reliability in off-line flyback converters

1

FAULT

OSC.

2

3

4

5

IN

LATCH

RS

FAULT

UVLO

operating in a constant OFF-time mode. The device incorporates the
primary control and drive circuit with a discrete avalanche-rated high­voltage power MOSFET.

Crucial system parameters such as maximum ON time and OFF
time are fixed during manufacture. Local control circuit decoupling and
layout are optimized within the device.

FDBK

SOFT START

FAULT-LATCH

TRIGGER

OVER-CURRENT

PROTECTION

6

7

8

9

+

REF.

Cycle-by-cycle current limiting, soft start, under-voltage lock-out
with hysteresis, over-voltage protection, and thermal shutdown protect
the device during all normal and overload conditions. Over-voltage
protection, thermal shutdown, or an external fault signal be latched.
The dual requirements of dielectric isolation and low transient thermal
impedance and steady-state thermal resistance are satisfied in an over-

Dwg. PK-002-1

ABSOLUTE MAXIMUM RATINGS

molded single-in-line power package.

Proven in substantial volumes, this device and its fixed-frequency
counterparts represents a significant advance in off-line SMPS reliability

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

growth and integration.

Drain-Source Voltage, VDS.............. 600 V

Continuous Drain Current, ID............ 6.0 A

1 ms Single-Pulse Drain Current,

IDM................................................. 24 A

FEATURES

Single-Pulse Avalanche Energy,

EA.............................................. 400 mJ

Feedback Input Current, I

........ 20 mA

FDBK

Fault-Latch Trig. Input Current, IFL 1.0 mA

dc ≤ 25%, I

........................... -50 mA

FLM

■ Constant OFF-Time Converter Operating Mode

■ Avalanche-Rated Power MOSFET Switch

■ Pulse-by-Pulse Current Limiting

Soft-Start Output Current, ISS....... -3.0 mA

Over-Current Protection Voltage,

V

............................................. 3.5 V

OCP

Insulation Voltage,V

Package Power Diss., PD........ See Graph

DISCONTINUED PRODUCT

WM(RMS)

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

■ Latched Over-Voltage and Thermal Protection

■ Maximum ON Time and OFF Time Set During Manufacture

■ Internal Under-Voltage Lockout with Hysteresis

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

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

— FOR REFERENCE ONLY

Operating Temperature Range,

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

■ Over-Molded SIP with Integral Isolated Heat Spreader

■ External Synchronization Capability

Storage Temperature Range,

T

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

stg

Always order by complete part number: STR-S6525 .

™

STR-S6525

4

3

512

9

6

7

8

OFF-LINE
SWITCHING REGULATOR

FUNCTIONAL BLOCK DIAGRAM

V

IN

DRAIN

SOURCE

OVER-CURRENT
PROTECTION

COMMON

Dwg. FK-002-1

SOFT

START

FAULT-LATCH

TRIGGER

2 kΩ

UVLO

REF.

TSD

TRIGGER

1 kΩ

20 kΩ

R

ton

OVER-VOLT.

PROTECT

FDBK

R

SQ

0.01 µF

0.01 µF

FAULT

LATCH

SYNC

OSC.

R

toff

+

0.75 V
1000 pF

ALLOWABLE PACKAGE POWER DISSIPATION MAXIMUM SAFE OPERATING AREA

60

54 W

40

20

3.2 W

ALLOWABLE PACKAGE POWER DISSIPATION in WATTS

0

20 60 100

MOUNTING SURFACE
TEMPERATURE

FREE AIR

RECOMMENDED MAX.
FRAME TEMP. = +100°C

TEMPERATURE in °C

LIMITED BY FRAME
TEMP. = +125°C MAX.

140

Dwg. GK-003-2

115 Northeast Cutoff, Box 15036

100

30

10

3.0

1.0

DRAIN CURRENT in AMPERES

0.3

0.1

3.0

LIMITED
BY r

DS(on)

NO HEAT SINK
NATURAL COOLING
T = +25°C

A

10 30 100 300

t = 0.1 ms SINGLE PULSE

w

t = 1 ms SINGLE PULSE

w

INFINITE HEAT SINK

DRAIN-TO-SOURCE VOLTAGE in VOLTS

DS

LIMITED BY V max

1000

Dwg. GK-004-4

™

Worcester, Massachusetts 01615-0036 [phone]
Copyright © 1994 Allegro MicroSystems, Inc.

STR-S6525

OFF-LINE
SWITCHING REGULATOR

ALLOWABLE AVALANCHE ENERGY

600

500

SINGLE PULSE

400

300

200

100

ALLOWABLE AVALANCHE ENERGY in mJ

0

20 40 80 120 160

0 60 100

STARTING CHANNEL TEMPERATURE in °C

DRAIN CURRENT = 5 A
SUPPLY VOLTAGE = 50 V

140

Dwg. GK-009-1

ELECTRICAL CHARACTERISTICS

at TA = +25°C, VIN = 18 V, voltage measurements are referenced to

Common (pin 3) (unless otherwise noted).

Limits

Characteristic Symbol Test Conditions Min. Typ. Max. Units

On-State Voltage V
Under-Voltage Lockout V
Over-Voltage Threshold V

OVP(th)

FET Leakage Current I
FET ON Resistance r

DS(on)

Output Fall Time t
Maximum ON Time t
Minimum OFF Time t
Over-Current Threshold V
Feedback Threshold V

OCP(th)

FDBK(th)

Soft-Start Voltage V
Sync. Trigger Threshold Volt. V

SYNC(th)

Fault-Latch Trig. Threshold V
Fault-Latch Holding Current I
Fault-Latch Reset Voltage V
Insulation RMS Voltage V

WM(RMS)

INT
INQ

DSS

f
on
off

SS

FL(th)
INH

INQ

Turn-on, increasing V
Turn-off, decreasing V

IN

IN

14.4 – 17.6 V

9.0 – 11 V
26 – 31 V

VDS = 600 V – – 300 µA
VGS = 10 V, ID = 3 A – 1.0 1.25 Ω
VDD = 200 V, ID = 5 A, 10% to 90% V
I

= 0 27 – 33 µs

FDBK

DS

– – 250 ns

50 – 62 µs

700 – 800 mV

– 750 – mV

8.7 – 9.7 V

– 3.0 – V

680 – 880 mV
VIN reduced from 31 V to 8.5 V – 340 400 µA
IIN ≤ 20 µA, VIN reduced from 31 V 6.5 – 8.5 V
All terminals simultaneous reference 2000 – – V

metal plate against backside

Supply Current I

IN(ON)

I

IN(OFF)

Thermal Shutdown T
Thermal Resistance R

J

θJM

Operating 9.0 – 15 mA
Start up, VIN =14 V – – 200 µA

125 150 – °C
FET junction 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.

STR-S6525

OFF-LINE
SWITCHING REGULATOR

TYPICAL CHARACTERISTICS

50

40

30

ON TIME in µs

20

10

0

0 0.6 1.0

0.2 0.4 0.8

FEEDBACK CURRENT in mA

Dwg. GK-019

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

™

STR-S6525

OFF-LINE
SWITCHING REGULATOR

WARNING: lethal potentials are present. See text.

5

5

7

+

AC INPUT

RECTIFIER

FULL-BRIDGE

TYPICAL APPLICATION

STR-S6525

R

SQ

+ OUTPUT

1

2

+

+

VOLTAGE

SENSE

– OUTPUT

★

8

+

6

4

150 Ω

TURN ON

9

3

TO PIN 6

TO PIN 8

Dwg. EK-001

APPLICATIONS INFORMATION

WARNING —

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 IRFBC40. 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).

These devices are designed to be operated at lethal voltages and energy levels. Circuit

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

Dow Corning 340, or equivalent

STR-S6525

OFF-LINE
SWITCHING REGULATOR

0.953

0.610

±0.008

0.118

Dimensions in Inches

(for reference only)

±0.008

T REF.

M

0.130

ø

±0.008

0.216

±0.008

±0.012

1.49

0.033

+0.008
–0.004

1

0.016

PACKAGE

CENTER

±0.008

0.709

0.276

±0.016

9

0.100

±0.004

0.177

±0.028

LEAD
CENTER

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

Dwg. MK-003-9 in

0.130

±0.004

0.216

0.026

+0.008
–0.004

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

™

STR-S6525

OFF-LINE
SWITCHING REGULATOR

15.5

±0.2

3.0

Dimensions in Millimeters

(controlling dimensions)

24.2

±0.2

T REF

M

3.3

ø

±0.2

5.5

±0.2

±0.3

23.0

0.85

+0.2
–0.1

1

0.4

PACKAGE

CENTER

±0.2

18.0

3.3

±0.1

7.0

±0.4

5.5

9

2.54

±0.1

0.65

+0.2
–0.1

4.5

±0.7

LEAD
CENTER

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

Dwg. MK-003-9 mm

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-S6525

OFF-LINE
SWITCHING REGULATOR

POWER CONVERSION/POWER MANAGEMENT

SELECTION GUIDES

SWITCHING REGULATOR PMCMs

Part

Number* Application V

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

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

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

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

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

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.

I

220/240V 140 W

220/240 V 180 W

220/240 V 140 W

220/240 V 180 W

220/240 V 220 W

Max P

O

Power Switch

POWER CONVERSION/POWER MANAGEMENT

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

™