Part Number: STRF6624
Function: Off-Line Quasi-Resonant Flayback Switching Regulators
Manufacturer: Allegro Microsystems
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Description
Series STR-F6600 INTERIM DATA SHEET (Subject to change without notice) February 22, 2000 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS The Series STR-F6600 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. The series incorporates a primary control and drive circuit with discrete avalanche-rated power MOSFETs. Data Sheet 28102.8 FDBK OSC. LATCH OCP UVLO OVP TSD Covering the power range from below 25 watts up to 300 watts for 100/115/230 VAC inputs, and up to 150 watts for 85 to 265 VAC universal input, these devices can be used in a range of applications, from battery chargers and set top boxes, to televisions, monitors, and industrial power supply units. Cycle-by-cycle current limiting, under-voltage lockout with hysteresis, over-voltage protection, and thermal shutdown protects the power supply during the normal overload and fault conditions. Over-voltage protection and thermal shutdown are latched after a short delay. The latch may be reset by cycling the input supply. Low-current startup and a low-power standby mode selected from the secondary circuit completes a comprehensive suite of features. The series is provided in a five-pin overmolded TO-3P style package, affording dielectric isolation without compromising thermal characteristics. 2 3 VIN 1 OVER-CURRENT & FEEDBACK 4 Dwg. PK-011-1 ABSOLUTE MAXIMUM RATINGS at TA = +25°C Control Supply Voltage, VIN 35 V Drain-Source Voltage, VDS Series STR-F6620 450 V Series STR-F6630 500 V Series STR-F6650 650 V Series STR-F6670 900 V Drain Switching Current, ID . See Table Peak Drain Current, IDM See Table Avalanche Energy, EAS . See Table OCP/FB Voltage Range, VOCP . -0.3 V to +6 V Package Power Dissipation, PD control (VIN x IIN(ON)) . 0.8 W total . 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, TS -40°C to +125°C GROUND SOURCE SUPPLY DRAIN 5 Features s Flyback Operation with Quasi-Resonant Soft Switching for Low Power Dissipation and EMI s Rugged Avalanche-Rated MOSFET s Choice of MOSFET Voltage and rDS(on) s Full Over-Current Protection (no blanking) s Under-Voltage Lockout with Hysteresis s Over-Voltage Protection s Direct Voltage Feedback s Low Start-up Current (<400 µA) s Low-Frequency, Low-Power Standby Operation s Overmolded 5-Pin Package Always order by complete part number, e.g., STR-F6652 . TM ™ Series STR-F6600 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS FUNCTIONAL BLOCK DIAGRAM V IN 4 DRIVE REG. UVLO OVER-VOLT. PROTECT S REF. R FAULT LATCH Q 3 2 DRAIN S [...]
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