BA9755S Ver la hoja de datos (PDF) - ROHM Semiconductor
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BA9755S Datasheet PDF : 10 Pages
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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
Limits
Unit
VCC1
18∗1
V
VCC2
20∗2
V
Pd
600∗1
mW
Operating temperature
Topr
– 25 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗ 1 18pin ∗ 2 3pin
∗ 3 Reduced by 6.0mW for each increase in Ta of 1°C over 25°C.
•Recommended operating voltage (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Applied voltage 1
VCC1
11 ~ 13
V
Applied voltage 2
VCC2
11 ~ 16
V
∗ Used with condition VCC2 м VCC1
1
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