8-53
8-16. Second Over Voltage Protection
If some failure occurs and the output voltage of the secondary windings of T651 increase, the voltage of
the auxiliary winding of T651 also increase proportionally. When the voltage of C651 increase about +13V.
This action will stop the oscillator with in IC651.
(Fig.8-17) Second Over Voltage Protection
8-17. Second Over Current Protection
If some failure occurs and the total power of secondary outputs increase, the peak current of IC651 pin3
increases.
And when the peak current of IC651 pin3 reaches about 1.5A,the voltage of IC651 pin 1 decrease.
When the the voltage of IC651 pin 1 decreases below 4.7V, IC651 operation stop.
Next,the charging current flows into C653 and the voltage of IC651 pin 1 increase about 5.7V.
IC651 continues the movement of decreasing and increasing voltages 8 times.
After IC651 repeats the intermittent oscillation.
(Fig.8-18) Second Over Current Protection
R652
Q651
Q652
ZD651
R653
CONTROL
IC651
SOURCE
1
2
PC651
T651
+
-
C651
D601(+)
C609
+
-
T651
R659
R657
R660
C660
C656
D653
IC651
C653
+
-
PWM
Control
Circuit
C
1
S
2
D
3
C610
+
-
Содержание MultiSync FP1370
Страница 13: ...4 4 REMARK SYMBOL Mount the EMF PWB 121E REMARK SYMBOL Clamp the connector ...
Страница 14: ...4 5 REMARK SYMBOL COIL FORMING UPPER SIDE REMARK SYMBOL COIL FORMING LOWER SIDE ...
Страница 23: ...4 14 REMARK SYMBOL REMARK SYMBOL Clamp CN CA CN CC and CN D with CLAMPER WIRE ...
Страница 26: ...4 17 REMARK SYMBOL Clamp the wires SAFETY REMARK SYMBOL Clamp the wires CN ASD CN AF 21 ...
Страница 80: ...5 51 Fig 3 11 CONV PWB Fig 3 12 EMF PWB CN EMF CN LL CN RR CNEM CN CA CN D CN CCB HS8N1 ...
Страница 143: ...8 18 15V 80V AFC D FOCUS Fig 3 1 HIGH VOLTAGE CIRCUIT AND PROTECTOR CIRCUIT ...
Страница 260: ...10 1 ...
Страница 261: ...10 2 ...
Страница 262: ...10 3 ...
Страница 263: ...10 4 ...
Страница 264: ...10 5 ...
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