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STR-S6707 THRU STR-S6709 OFF-LINE SWITCHING REGULATORS ­ WITH BIPOLAR SWITCHING TRANSISTOR COLLECTOR 1 COMMON 2 FAULT 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. S DRIVE FAULT LATCH Data Sheet 28113 BASE 3 SINK 4 OSC. R DRIVE OVER-CURRENT PROTECTION FDBK 5 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. 6 + REF. 7 INHIBIT 8 UVLO V IN 9 Dwg. PK-001 ABSOLUTE MAXIMUM RATINGS 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 ... -20°C to +125°C Storage Temperature Range, Tstg ... -40°C to +125°C I D C S N O F I T U N Proven in substantial volumes, these devices and their fixedfrequency counterparts represent a significant advance in off-line SMPS reliability growth and integration. D E R P N E U Y D L O N O T C -- + E C FEATURES R O R s Quasi-Resonant Operation for Low EMI and High Efficiency s Output Power to 220 W s Low-Power Output Standby Mode s Pulse-by-Pulse Over-Current Protection s Latched Over-Voltage and Thermal Protection s Third-Generation Switching Tra