BA9756FS Datasheet, PDF (1/9 Pages) Rohm – High-voltage control circuit for CRT displays

Multimedia ICs
BA9756FS
High-voltage control circuit for CRT
displays
BA9756FS
The BA9756FS is LSIs that control CRT anode voltage in multi-scan monitors and similar devices, using
a chopper-type voltage control circuit. The internal sawtooth wave generator circuit uses automatic gain control
(AGC) to enable coverage of a wide range from 30kHz to over 150kHz. The BA9756FS is equipped with an internal
high-precision voltage source featuring an output voltage precision of ± 0.7%.
!Applications
CRT displays, HDTVs, others
!Block diagram
20
19
18
17
16
15
14
13
12
11
VCC1
VCC2
!Features
1) Internal chopper-type voltage
control circuit.
2) Internal buffer circuit enables direct
drive of Power MOSFET for output
drive.
3) Internal high-precision voltage
source offers output voltage
precision of ± 0.7%.
–
+
+
+
–
Buffer
SAW GEN.
M/M
9.0V
REF
GND
1
2
3
4
5
6
7
8
9
10
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage 1
Power supply voltage 2
Power dissipation
VCC1
VCC2
Pd
18
V
20
V
750^*1
mW
Operating temperature
Topr
- 25~+80
˚C
Storage temperature
Tstg
- 55~+125
˚C
*1 ^{When mounted on a 70mm × 70mm × 1.6mm glass epoxy board.}
Reduced by 7.5mW for each increase in Ta of 1˚C over 25˚C.
!Recommended operating conditions (Ta=25°C)
Parameter
Symbol Min. Typ. Max.
Unit
Power supply voltage 1
VCC1
11
-
17
V
Power supply voltage 2
VCC2
11
-
17
V