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.
Covering the power range from below 25 watts to 300 watts for 100/115/230 VAC inputs, and to 150 watts for 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.
Control Supply Voltage, VIN. 35 V Drain-Source Voltage, VDS Series 450 V Series 500 V Series 650 V Series 900 V Drain Switching Current, ID. See Table Peak Drain Current, IDM. See Table Avalanche Energy, EAS. See Table OCP/FB Voltage Range, VOCP. +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. to +125°C Storage Temperature Range, TS. to +125°C
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.
Series STR-F6600 OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS
IN 4 DRIVE REG. UVLO OVER-VOLT. PROTECT S REF. R FAULT LATCH 3 2 DRAIN SOURCE
Allowable package power dissipation curves are shown on page 10.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 Copyright © 2000 Allegro MicroSystems, Inc.
* Derate per graph, page 2 Derate per graph, page 12