Daewoo DTL- 25G6F Service Manual download pdf (Page 22)

TDA8351 (DC-coupled vertical deflection circuit)

(1) General Description

and 110 color deflection systems for field frequencies of 50 to 120 Hz.

The circuit provides a DC driven vertical deflection output circuit, operating as a high efficient class G system.

(2) Feature

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High efficient fully DC-coupled vertical output bridge circuit

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Vertical fly-back switch

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Guard circuit

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Protection against : - short circuit of the output pins (7 and 4)

- short circuit of the output pins to Vp

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Temperature (thermal) protection

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High EMC immunity because of common mode inputs

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A guard signal in zoom mode.

(3) Block Diagram

(4) Pin Description

PIN SYMBOL DESCRIPTION

1 I drive (pos) input power stage (positive); include Ii(sb) signal bias

2 I drive (neg) input power stage (negative); include Ii(sb) signal bias

3 V p operating supply voltage

4 V o(b) output voltage B

5 GND ground

6 V fb input fly-back supply voltage

7 V o(a) output voltage A

8 V o(guard) guard output voltage (Not used)

9 V I(fb) input feedback voltage

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 57 58

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Daewoo DTL- 25G6F Service Manual Page 22