BA9756FS
Multimedia ICs
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
!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%.
!Block diagram
M / M
GND
9.0V
REF
VCC1VCC2
Buffer
+
+
–
+
–
SAW GEN.
20
1
19
2
18
3
17
4
16
5
15
6
14
7
13
8
12
9
11
10
!Absolute maximum ratings (Ta=25°C)
Parameter Symbol Limits Unit
VCC1
VCC2
Pd
Topr
Tstg
- 25~+80
Power supply voltage 1
Power supply voltage 2
Power dissipation
Operating temperature
Storage temperature
*1
*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.
18
20
750
- 55~+125
V
V
˚C
˚C
mW
!Recommended operating conditions (Ta=25°C)
Parameter Symbol UnitMax.Typ.Min.
VCC1
VCC2
11
11
-
-
V
V
17
17
Power supply voltage 1
Power supply voltage 2