Beko K1 CHASSIS Service Manual page 16

7.2)TDA 8357
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
Supplies
Vp Supply voltage
VFB flyback supply voltage
Iq(P)(av) average quiescent supply current
Iq(FB)(av) Iq(FB)(av)
Ptot total power dissipation
Inputs and outputs
Vi(p-p) input voltage (peak-to-peak value)
Io(p-p) output current (peak-to-peak value)
Flyback switch
Io(peak) maximum (peak) output current
Thermal data; in accordance with IEC 60747-1
Tstg storage temperature
Tj junction temperature
7.3)MC14052B
The MC14052B analog multiplexer is a digitally–controlled analog switch.
The MC14052B effectively implements a DP4T solid state switch. This
device's feature low ON impedance and very low OFF leakage current.
Control of analog signals up to the complete supply voltage range can be
achieved.
• Triple Diode Protection on Control Inputs
• Switch Function is Break Before Make
• Supply Voltage Range = 3.0 Vdc to 18 Vdc
CONDITIONS MIN.
7.5
2 x VP
during scan -
during scan -
-
-
-
t ≤ 1.5 ms -
-55
-
15
TYP. MAX UNIT
12 18 V
45 66 V
10 15 mA
- 10 mA
- 8 W
1000 1500 mV
- 2.0 A
- ± 1.2 A
- +150 ºC
ºC
- +150