OSC.
LATCH
OVP
OFF-LINE QUASI-RESONANT
The STR-G6653 is specifically designed to satisfy the requirements
for increased integration and reliability in off-line quasi-resonant flyback
converters. This device 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
Proven in substantial volumes, the STR-G6653 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.
ABSOLUTE MAXIMUM RATINGS
Control Supply Voltage, VIN . . . . . . . 35 V
Drain Current, ID
continuous . . . . . . . . . . . . . . . . . . 2.7 A
Avalanche Energy, EAS
Over-Current Protection Voltage Range,
Insulation RMS Voltage,
VWM(RMS) . . . . . . . . . . . . . . . . . . 2000 V
control (VIN x IIN(ON)) . . . . . . . . . 0.8 W
total . . . . . . . . . . . . . . . . . . . See Graph
Internal Frame Temperature, TF . . +125°C
TA . . . . . . . . . . . . . . . -20°C to +125°C
TS . . . . . . . . . . . . . . . -40°C to +125°C
s Quasi-Resonant Operation
s Low-Loss, Pulse-Ratio-Control Standby Mode
s Temperature-Compensated Pulse-by-Pulse Over-Current Protection
s Under-Voltage Lockout with Hysteresis
s Active Low-Pass Filter for Enhanced Light-Load Stability
s Switched Attenuation of Leading-Edge Current-Sensing Signal
s Adjustable Switching Speed for EMI Control
Always order by complete part number: STR-G6653 .
