Features: · Quasi-Resonant Operation
· Output Power to 66 W
· Low-Loss, Pulse-Ratio-Control Standby Mode
· Temperature-Compensated Pulse-by-Pulse Over-Current Protection
· Latched Over-Voltage and Thermal Protection
· Under-Voltage Lockout with Hysteresis
· Active Low-Pass Filter for Enhanced Light-Load Stability
· Switched Attenuation of Leading-Edge Current-Sensing Signal
· Regulated Soft Gate Drive
· Adjustable Switching Speed for EMI Control
· Overmolded Five-Pin PackageSpecificationsControl Supply Voltage, VIN . . . . . . . 35 V
Drain-Source Voltage, VDS . . . . . . . . 650 V
Drain Current, ID continuous . . . . . . . . . . . . . . . . . . 2.7 A
single-pulse, tw 1 ms . . . . . . . . 7.2 A
Avalanche Energy, EAS single-pulse . . . . . . . . . . . . . . . 158 mJ
Over-Current Protection Voltage Range, VOCP . . . . . . . . . . . . . . . -0.3 V to +6 V
Insulation RMS Voltage, VWM(RMS) . . . . . . . . . . . . . . . . . . 2000 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
DescriptionThe STR-G6651 is specifically designed to satisfy the requirements for increased integration and reliability in off-line quasi-resonant flyback converters. This STR-G6651 incorporates the primary control and drive circuit with a discrete avalanche-rated power MOSFET.
Cycle-by-cycle current limiting, under-voltage lockout with hyster- esis, 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 device is provided in a five-pin over-molded TO-220 style package, affording dielectric isolation without compromising thermal characteristics. Two lead forms are available (with and without the suffix '-LF') to accommodate printed wiring board layout or mechanical constraints.
Proven in substantial volumes, the STR-G6651 is a robust low-risk solution for off-line power supplies particularly where management of EMI at the source is a significant element of the system design.
STRG6622 Data Sheet
