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Service Manual CP-785F
4-7 STR - F665X
4-7-1 General description
The STR-F665X is an hybrid IC with a build-in MOSFET and control IC, designed for flyback
converter type switch mode power supply applications.
4-7-2 Features
Small SIP fully isolated molded 5 pins package
Many protection functions :
* Pulse-by-pulse overcurrent protection (OCP)
* Overvoltage protection with latch mode (OVP)
* Thermal protection with latch mode (TSD)
4-7-3 Block diagram
4 Vin
Start
Rcg.
T.S.D.
DRV. REC=8.6V
O.V.P.
Latch
OSC
-
+
Tth(min)=1 S
4700pF
T OFF=50 S typ.
STR-F6600 block diagram
-28-
V
DR
Vth1=0.73±0.05V
-
+
OCP/FB comp.
1.35mA
V(h2=1.3~1.6V
1NH comp.
Iconst-trm.
5 GND
3 Drain
Rg2
Rg1
2 Source
1 OCP/FB
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