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Details, datasheet, quote on part number: STR-S6709
 
 
Part numberSTR-S6709
CategoryPower Management
DescriptionOff-line Switching Regulators With Bipolar Switching Transistor
CompanyAllegro Micro Systems, Inc.
DatasheetDownload STR-S6709 datasheet
Request For QuoteFind where to buy STR-S6709
 


 
Specifications, Features, Applications

OFF-LINE SWITCHING REGULATORS ­ WITH BIPOLAR SWITCHING TRANSISTOR

The STR-S6707, STR-S6708, and STR-S6709 are specifically designed to meet the requirement for increased integration and reliability in off-line quasi-resonant flyback converters. These devices incorporate the primary control and proportional drive circuit with a thirdgeneration high-voltage bipolar switching transistor. Crucial system parameters such as maximum ON time and OFF time are fixed during manufacture. Local control circuit decoupling and layout are optimized within each device. Cycle-by-cycle current limiting, under-voltage lock-out with hysteresis, 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 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 overmolded single-in-line power package. Proven in substantial volumes, these devices and their fixedfrequency counterparts represent a significant advance in off-line SMPS reliability growth and integration.

Supply Voltage, VIN........................... 15 V Output Voltage, VCEX....................... 850 V VEBO................................................ 7 V Continuous Output Current, IC.......................................... See Table 1 ms Single-Pulse Output Current, ICM........................................ See Table Sink Current, IS......................... See Table Drive Current, ID.......................... -700 mA Feedback Current, IFDBK................. 20 mA Inhibit Voltage, VINH........................... 15 V Over-Current Protection Voltage Range, VOCP............................................ ±3.5 V Insulation Voltage,VWM(RMS)........... 2000 V Package Power Diss., PD........ See Graph Output Junction Temperature, TJ.. +150 °C Internal Frame Temperature, TF... +125 °C Operating Temperature Range, TA............................... to +125°C Storage Temperature Range, Tstg............................. to +125°C

FEATURES

Quasi-Resonant Operation for Low EMI and High Efficiency Output Power 220 W Low-Power Output Standby Mode 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

Always order by complete part number: Max. Cont. Peak Part Number Current, IC Current, ICM 20 A

115 Northeast Cutoff, Box 15036 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 Worcester, 01615-0036 (508) Copyright ©Massachusetts 1994 Allegro MicroSystems, Inc. 853-5000

STR-S6709 FUNCTIONAL BLOCK DIAGRAM AS ABOVE EXCEPT FOR SINK OUTPUT

ELECTRICAL CHARACTERISTICS = +25°C, VIN 8.5 V, voltage measurements are referenced to Common (pin 2) (unless otherwise noted).

DC Current Gain Maximum ON Time Minimum OFF Time Over-Current Threshold Feedback Threshold Volt. Inhibit Threshold Voltage

Latch Holding Current Latch Reset Voltage Supply Current Insulation RMS Voltage Thermal Shutdown Thermal Resistance

Oscillation stops Oscillation synchronized Oscillation stops (fault latch set) VIN reduced from 4 V IIN 100 µA, VIN reduced from 10.7 V Operating All terminals simultaneous reference metal plate against backside Output junction to mounting surface

NOTES: Negative current is defined as coming out of (sourcing) the specified device terminal. Typical Data is for design information only.




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