akira CT-21CDP5CP, Service Manual

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Model no.: .CT-21CDP5CP.doc
version 1.0
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1.7 Power module STR-G5653/6454R
Switch-mode Power Supply STR- G5653/F6654
The Series STR-G5653/F6654 is specifically designed to satisfy the requirements for increased
integration and reliability in off-line quasi-resonant flyback converters. The series incorporates
a high-precise error amplifying control and drive circuit with discrete avalanche-rated power
MOSFET, featuring fewer external components, small-size and standard power supply.
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. 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 SIP style package, affording dielectric isolation without compromising
thermal characteristics.
1) Features
•
Flyback Operation with Quasi-Resonant Soft Switching for Low Power Dissipation and
EMI
•
Rugged Avalanche-Rated MOSFET
•
Soft drive circuit MOSFET
•
Adjustable MOSFET switching speed
•
Choice of MOSFET Voltage and rDS(on)
•
Full Over-Current Protection (no blanking)
•
Under-Voltage Lockout with Hysteresis
•
Over-Voltage Protection
•
Direct Voltage Feedback
•
Low Start-up Current (100
μ
Amax)
•
Low-Frequency, Low-Power Standby Operation
•
Overmolded 5-Pin Package
2) Circuit Block Diagram
Fig.18