Caple C702G Wartungshandbuch PDF herunterladen (Seite 176)

8-51

8-12. Second Auxiliary Power Supply Circuit

The second auxiliary power supply circuit need to activate IC651. When the power switch is turn on, the

current flows into IC651 pin3.

And the current which flowed out from IC651 pin1 charges C653.

Oscillation starts when the voltage of IC651 pin 1 reaches about 6V by this action.

After start of oscillation, the fly-back voltage of the auxiliary winding of T651 is rectified and smoothed by

D651,R651 and C651.

The resulting DC voltage is supplied to IC651 pin 1.(Then current frows in into IC651 pin 1.)

(Fig.8-13) Second Auxiliary Power Supply Circuit

8-13. Second Converter Circuit

The second converter circuit consists of the primary winding of T651,

a switching device MOSFET(internal IC651) and surge absorbers (C656,C660,R659,R660 and D653)

which are connected to the primary winding of T651.The feedback current to control “ON Duty” flows in

into IC651 pin 1. so that the collector-emitter is turned ON and OFF.

IC651 pin 1 is also used as the connection to provide internal bias current.

(Fig.8-14) Second Conveter Circuit

D601(+)

T651

C609

D651

PC651

R658

R657

C653

C654

C651

R651

DRAIN

CONTROL

IC651

SOURCE

C610

D601(+)

C609

T651

R659

R657

R660

C660

C656

D653

IC651

Feedback Current

C653

PWM

Control

Circuit

C610

1 2 ... 171 172 173 174 175 176 177 178 179 180 181 ... 285 286

Kommentare zu diesen Handbüchern

Keine Kommentare

Caple C702G Wartungshandbuch Seite 176

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Kochfelder Caple C702G