Daewoo DUB-2850, Руководство по обслуживанию

Страница: 26 / 79

-26-
CP-780 Service Manual
4.3 TDA8358J VERTICAL AMPLIFIER
The TDA8358J are power circuit for use in 90 and 110 colour deflection systems for field
frequencies of 25 to 200Hz field frequencies, and for 4:3 and 16/9 picture tubes. The IC
contains a vertical deflection output circuit, operating as a high efficiency class G system. The
full bridge output circuit allows DC coupling of the deflection coil in combination with single
positive supply
voltages.
The east-west output stage is able to supply the sink current for a diode modulator circuit.
The IC is constructed in a Low Voltage DMOS(LVDMOS) process that combines bipolar, CMOS
and DMOS devices. DMOS transistors are used in the output stage because of the absence of
second breakdown.
4.3.1 TDA8358J
Features :
* Few external components
* Highly efficient fully DC-coupled vertical bridge output circuit
* Vertical flyback switch with short rise and fal times
* Built-in guard circuit
* Thermal protection circuit
* Improved EMC performance due to differential inputs
* East-west output stage