Beko E1 CHASSIS, Руководство по обслуживанию

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14
TDA 8357J
GENERAL DESCRIPTION
The TDA8357J is a power circuit for use in 90
°
and
110
°
colour deflection systems for 25 to 200 Hz 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 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 absence of second breakdown.
FEATURES
•
Few external components required
•
High efficiency fully DC coupled vertical bridge outputcircuit
•
Vertical flyback switch with short rise and fall times
•
Built-in guard circuit
•
Thermal protection circuit
•
Improved EMC performance due to differential inputs
SYMBOL PARAMETERS CONDITIONS MIN. TYP. MAX UNIT
Vp Supply voltage 7.5 12 18 V
VFB flyback supply voltage 2 x VP 45 66 V
Iq(P)(av) average quiescent supply current during scan - 10 15 mA
Iq(FB)(av) Iq(FB)(av) during scan - - 10 mA
Ptot total power dissipation - - 8 W
Vi(p-p) input voltage (peak-to-peak value) - 1000 1500 mV
Io(p-p) output current (peak-to-peak value) - - 2.0 A
Io(peak) maximum (peak) output current t
≤
1.5 ms - - ± 1.2 A
Tstg storage temperature -55 - +150 ºC
Tj junction temperature - - +150 ºC
Supplies
Inputs and outputs
Flyback switch
Thermal data; in accordance with IEC 60747-1
TDA 2822
DESCRIPTION
The TDA2822 is a monolithic integrated circuit in
12+2+2 powerdip, intended for use as dual audio
power amplifier in portable radios and TS sets.