str-s5703 Allegro MicroSystems, Inc., str-s5703 Datasheet

str-s5703

Manufacturer Part Number

str-s5703

Description

Off-line Switching Regulator ? With Bipolar Switching Transisto

Manufacturer

Allegro MicroSystems, Inc.

Datasheet

1.STR-S5703.pdf (8 pages)

Current page: 1 of 8
Download datasheet (122Kb)

OVER-CURRENT

Supply Voltage, V

Output Voltage, V

Continuous Output Current,

1 ms Single-Pulse Output Current,

Sink Current, I

Drive Current, I

Inhibit Voltage, V

Over-Current Protection Voltage Range,

Insulation Voltage, V

Package Power Diss., P

Output Junction Temperature, T

Internal Frame Temperature, T

Operating Temperature Range,

Storage Temperature Range,

ABSOLUTE MAXIMUM RATINGS

PROTECTION

COLLECTOR

32 V SENSE

COMMON

EBO

OCP

stg

INHIBIT

.................................................. 6.0 A

DRIVE

............................... -20 C to +125 C

BASE

SINK

................................................. 12 A

............................. -40 C to +125 C

V IN

................................................ 7 V

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

................................. 1.5 A

.......................... -700 mA

INH

CEX

DRIVE

........................... 15 V

WM(RMS)

....................... 500 V

........ See Graph

OSC.

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

– WITH BIPOLAR SWITCHING TRANSISTOR

... +125 C

FAULT

LATCH

.. +150 C

FAULT

UVLO

REF.

Dwg. PK-004

OFF-LINE SWITCHING REGULATOR

STR-S5703

for increased integration and reliability in off-line quasi-resonant flyback

converters with indirect feedback. The device incorporates the primary

control and proportional drive circuit with a third-generation high-voltage

bipolar switching transistor.

time are fixed during manufacture. Local control circuit decoupling and

layout are optimized within each device.

esis, over-voltage protection, and thermal shutdown protect these

devices during all normal and overload conditions. Over-voltage

protection and thermal shutdown are latched after a short delay. A

primary-side error amplifier with reference is included to facilitate

regulation from an auxiliary or bias winding of the power transformer. A

versatile triple-level inhibit circuit includes the OFF time synchronization

required to establish quasi-resonant operation. The inhibit function has

also been expanded to initiate operation in stand-by mode in which the

power supply delivers a small fraction of the steady-state output power.

The dual requirements of dielectric isolation and low transient thermal

impedance and steady-state thermal resistance are satisfied in an over-

molded single-in-line power package.

counterparts represents a significant advance in off-line SMPS reliability

growth and integration. Similar devices with increased ratings are the

STR-S5707 and STR-S5708.

FEATURES

Always order by complete part number: STR-S5703 .

™

Quasi-Resonant Operation for Low EMI and High Efficiency

Output Power to 140 W

Low-Power Output Standby Mode

Indirect Feedback from Auxiliary Winding

Pulse-by-Pulse Over-Current Protection

Latched Over-Voltage and Thermal Protection

Third-Generation Switching Transistor with Proportional Drive

Maximum ON Time and Off Time Set During Manufacture

Internal Under-Voltage Lockout with Hysteresis

Over-Molded SIP with Integral Isolated Heat Spreader

Reduces External Component Count

The STR-S5703 is specifically designed to meet the requirement

Crucial system parameters such as maximum ON time and OFF

Cycle-by-cycle current limiting, under-voltage lock-out with hyster-

Proven in substantial volumes, this device and its fixed-frequency

Related parts for str-s5703

str-s5703 Summary of contents

Page 1

... C to +125 C stg STR-S5703 OFF-LINE SWITCHING REGULATOR The STR-S5703 is specifically designed to meet the requirement for increased integration and reliability in off-line quasi-resonant flyback converters with indirect feedback. The device incorporates the primary control and proportional drive circuit with a third-generation high-voltage bipolar switching transistor ...

Page 2

... STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR FUNCTIONAL BLOCK DIAGRAM SENSE 7 R ton 1500 pF 3300 pF ALLOWABLE PACKAGE POWER DISSIPATION 60 MOUNTING SURFACE 54 W TEMPERATURE RECOMMENDED MAX. 40 FRAME TEMP. = +100 C 20 FREE AIR 3 TEMPERATURE UVLO OVER-VOLT. FAULT PROTECT LATCH ...

Page 3

... - +100 Operating IN(ON) I IN(OFF) V All terminals simultaneous reference WM(RMS) metal plate against backside Output junction to mounting surface JM STR-S5703 QUASI-RESONANT FLYBACK SWITCHING REGULATOR = 8.5 V, voltage measurements are Min. Typ. Max. 7.6 8.0 IN 4.6 4.9 IN 9.2 Ð Ð Ð -0.88 -1.0 -1.12 31.7 32.0 0.65 0.75 Ð ...

Page 4

... STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR 100 5.0 3.0 1.0 0.01 TYPICAL CHARACTERISTICS 0.03 0.1 0.3 1.0 3.0 COLLECTOR CURRENT in AMPERES 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 10 30 100 Dwg. GK-001-1 ™ ...

Page 5

... Nm). Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease: Dow Corning 340, or equivalent www.allegromicro.com WARNING: lethal potentials are present. See below APPLICATIONS INFORMATION STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR + + OUTPUT + Ð ...

Page 6

... STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR 0.033 +0.008 Ð0.004 PACKAGE CENTER Dimensions in Inches (for reference only) 0.953 0.008 T REF. M 0.610 0.130 0.008 ¿ 0.008 0.118 0.276 0.016 9 1 0.016 0.100 0.004 0.177 0.028 LEAD CENTER NOTE: Exact body and lead configuration at vendorÕs option within limits shown. ...

Page 7

... PACKAGE www.allegromicro.com Dimensions in Millimeters (controlling dimensions) 24.2 0.2 T REF M 15.5 0.2 3.3 ¿ 3.0 0.2 7.0 0 0.4 2.54 0.65 0.1 +0.2 Ð0.1 LEAD CENTER CENTER NOTE: Exact body and lead configuration at vendorÕs option within limits shown. STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR 5.5 0.2 3.3 0.1 5.5 4.5 0.7 Dwg. MK-003-9 mm ...

Page 8

... STR-S5703 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR Part Number* Application 3002M 5 V switching regulator and switching regulator 3004M 5 V switching regulator and Dual 9 V switching regulator S5703 Quasi-resonant flyback converter S5707 Quasi-resonant flyback converter S5708 Quasi-resonant flyback converter S6703 Quasi-resonant flyback converter ...

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