1

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.

CRT displays and HDTV products

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.

Parameter

Symbol

Limits

Unit

Applied voltage 1

V

Applied voltage 2

V

Power dissipation

Pd

mW

Operating temperature

Topr

– 25 ~ + 75

°C

Storage temperature

Tstg

– 55 ~ + 125

°C

Parameter

Symbol

Limits

Unit

Applied voltage 1

V

Applied voltage 2

V