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ROHM Semiconductor - High voltage controller for CRT displays

Numéro de référence BA9755S
Description High voltage controller for CRT displays
Fabricant ROHM Semiconductor 
Logo ROHM Semiconductor 





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BA9755S fiche technique
Multimedia ICs
High voltage controller for CRT
displays
BA9755S
The BA9755S is an LSI chip with a chopper voltage controller designed to control the anode voltage of multiscan
monitors and other CRTs. There are two internal high-precision power supplies, each with an output voltage preci-
sion of ±1%. Using a high-precision voltage detection resistor makes it possible to set anode voltage without adjust-
ment. Other internal components include an output voltage error detector and an overcurrent detector, which detects
overcurrent when the power is turned on.
Applications
CRT displays and HDTV products
Features
1) Internal chopper voltage controller.
2) Two internal high-precision power supplies, each
with an output voltage precision of ±1%.
3) Internal output voltage error detector.
4) Internal buffer circuit that directly drives power MOS-
FET for output drive.
Absolute maximum ratings (Ta = 25°C)
Parameter
Applied voltage 1
Applied voltage 2
Power dissipation
Symbol
VCC1
VCC2
Pd
Limits
181
202
6001
Operating temperature
Topr
– 25 ~ + 75
Storage temperature
Tstg – 55 ~ + 125
1 18pin 2 3pin
3 Reduced by 6.0mW for each increase in Ta of 1°C over 25°C.
Unit
V
V
mW
°C
°C
Recommended operating voltage (Ta = 25°C)
Parameter
Symbol
Limits
Applied voltage 1
VCC1
11 ~ 13
Applied voltage 2
VCC2
Used with condition VCC2 м VCC1
11 ~ 16
Unit
V
V
1

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