|
|
|
부품번호 | BA9756FS 기능 |
|
|
기능 | High-voltage control circuit for CRT displays | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 9 페이지수
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
Power supply voltage 1
VCC1
18
Power supply voltage 2
Power dissipation
VCC2
Pd
20
750*1
Operating temperature
Topr
- 25~+80
Storage temperature
Tstg
- 55~+125
*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.
Unit
V
V
mW
˚C
˚C
!Recommended operating conditions (Ta=25°C)
Parameter
Power supply voltage 1
Power supply voltage 2
Symbol
VCC1
VCC2
Min.
11
11
Typ.
-
-
Max.
17
17
Unit
V
V
Multimedia ICs
VCC
VCC2
14
8
VREG9
BA9756FS
12
PWMOUT
Fig.5
VCC
11
PGND
VCC
Fig.6
VCC1
20
15
DTC
Fig.7
19
ERRREF
16
ERROUT
Fig.8
10
GND
Fig.9
4페이지 Multimedia ICs
BA9756FS
!Measurement conditions (unless otherwise noted, Ta=25°C, Vcc=15V)
Parameter
Switch position
Symbol
SW1 SW3 SW4 SW5 SW6 SW9 SW11 SW12 SWa SWb SWc
Conditions
Circuit current
ICC - 1 1 1 1 1 1 - - - -
-
<Error amplifier>
Input bias current
IB 1 1 1 1 1 1 1 1 1 1 1 Vs1 = 6V, IB = - VIN ×10–5
Input offset voltage
VIO 1 1 1 1 1 1 1 1 2 2 2 Vs1 = 6V, VIO = (V12 – 6) × 10–2
Output low level voltage VOL 1 1 1 1 1 1 1 1 2 1 1 Vs1 = 5V, Vs13 = 6V
Output high level voltage VOH 1 1 1 1 1 1 1 1 2 1 1 Vs1 = 7V, Vs13 = 6V
Open voltage gain
Max. output current
AV - 1 1 1 1 1 1 - - - - SG1: f = 1kHz,VIN = 10mVP-P
IOM 1 1 1 1 1 1 1 2 2 1 1 Vs1 = 7V, Vs13 = 6V
*1
<PWM amplifier>
Output high level voltage VOH - 2 1 1 1 2 2 - - - - Vs3 = 6V,Vs11 = 5V, Is9 = - 100mA
Output low level voltage VOL - 2 1 1 1 2 2 - - - - Vs3 = 6V,Vs11 = 7V, Is9 = ± 100mA
Rise time
Tr - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Fall time
Td - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Min. pulse width
TMin - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
<HD input pin>
Input high level voltage VIH - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Input low level voltage
VIL - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Input high level current IIH - 1 1 2 1 1 1 - - - -
-
Input low level current
IIL - 1 1 1 1 1 1 - - - -
-
<Monostable multivibrator>
Delay time
Tdl - 1 2 3 1 1 1 - - - - SG5: f = 90kHz, Vs4 = 9V *2
<SAW GEN>
Output high level
HOS - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Output low level
LOS - 1 1 3 1 1 1 - - - - SG5: f = 90kHz
*2
Output level f
characteristic
fsaw - 1 1 3 1 1 1 - - - - SG5: f = 30kHz
*3
<Reference voltage supply>
Output voltage
VREF9
-
111111
-
-
-
-
-
Max. output current
Irmax9
-
111211
-
-
-
- Is = – 10mA
Output voltage thermal
TREF9
1 1 1 1 1 1 - - - - Ta = 0˚C→ 75 ˚C
characteristic
-
Thermal shutdown
Tdow - 1 1 1 1 1 1 - - - - Ta = 75˚C
*4
*1 The pin 12 output amplitude should be set to VO. AV = 20log (VO / VIN) [dB]
*2 For the method by which the output waveform is determined, refer to Fig. 14.
*3 An input frequency should be measured that produces a level of -1dB for a high output level (HOS) for the sawtooth waveform at an input frequency of
30kHz.
*4 The temperature is measured at the point where the temperature is raised to above Ta = 75˚C and the output level of pin 9 is high.
7페이지 | |||
구 성 | 총 9 페이지수 | ||
다운로드 | [ BA9756FS.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
BA9756FS | High-voltage control circuit for CRT displays | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |