Daewoo DTL- 25G6F, Service Manual

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21
STR-F6654 (Hybrid IC for a Switching Regulator)
(1) General Description
The STR-F6654 is a Hybrid IC with a built in power transistor and a separate excitation control IC,
designed for converter type switching mode power supply applications.
The IC is capable of quasi-resonant mode and requires small number of external component.
(2) Feature
• Small SIP isolated package : Resin sealed type (transfer mold)
• Lower power dissipation at a lighter load
• Many protection function : - Pulse-by-pulse over current protection
- Over-voltage protection with a latch
- Thermal protection with a latch
• These protection functions are incorporated and can be latched with an external signal.
(3) Block Diagram
(4) Pin Description
Pin
1
2
3
4
5
Symblols
O.C.P/F.B
S
D
VIN
GND
Description
Overcurrent/Feedback terminal
Source terminal
Drain terminal
Power supply terminal
Ground terminal
Functions
Input of overcurrent detection signal and
constant voltage control signal
MOS FET source
MOS FET drain
Input of power supply for control circuit
Ground