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부품번호 | BA7755A 기능 |
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기능 | High-voltage audio head selection switch | ||
제조업체 | ROHM Semiconductor | ||
로고 | |||
전체 4 페이지수
Video ICs
High-voltage audio head selection
switch
BA7755A / BA7755AF
The standard audio circuits of video cassette recorders and the recording circuits of tape decks use AC bias record-
ing to record the audio signal onto the tape. This bias voltage is some tens of volts, and a high-capacity bias-side
switch is required to electronically switch the head when in playback or record mode.
The BA7755A and BA7755AF are high-voltage switching ICs designed to switch voltages as high as ± 65VDC or
AC120VP-P (f = 70Hz).
Two control systems, one for current control, and one for voltage control are provided, so the ICs can be used in cir-
cuits that employ either method.
By combining the BA7755A or BA7755AF with the BA7751ALS recording / playback amplifier, it is possible to con-
struct a compact recording / playback audio circuit. In addition, the BA7755A and BA7755AF are an excellent choice
for a wide variety of other high-voltage switching applications.
•Applications
Video cassette recorders and tape decks
•Features
1) High withstanding voltage ( ± 65VDC (Min.),
AC120VP-P (Min.), f = 70Hz).
2) Circuits for either current control or voltage control
are provided on the chip.
3) Compact SIP 5pin or SOP 8pin package.
•Block diagram
BA7755A
12345
VCC SW GND CTRL2 CTRL1
BA7755AF
8
N.C.
7
N.C.
CTRL1
6
N.C.
5
1234
VCC HEAD GND CTRL2
SWITCH
1
Video ICs
BA7755A / BA7755AF
•Application example
2
VCC LINE IN
R6
5.6 k
+
C10
+
46
+
+
8 10
BIAS
LINE OUT PB
EE
REC EP
EE SP
R8 10k
++
+
12 14 16 18 20 22
BUFF.
CTRL VCC
MUTE ON
MUTE OFF
24
BA7751ALS
BIAS
R
SW1
P
PB
ALC DET.
ALC VR.
SW5
LINE
40dB
SW3
1
R1 47
SW7
35 7
R2 R3
330k 12k
R5
18k
C4
+ 0.01µ
+
9
11 13
+
+
15
17
SW4
REC
SW8
19 21 23
R15 51k
+
L1 R19
3.9mH 470
+
PB IN REC OUT
BA7755A
12345
R / P HEAD
VR2
AC BIAS
Note:
R13, C16, R16 and C18 prevent switching
noise. These are not required if external
muting or some other method is used to
eliminate switching noise.
•External dimensions (Units: mm)
BA7755A
Fig.4
BA7755AF
11.8 ± 0.2
2.4 ± 0.2
5.0 ± 0.2
85
1
2.54
5
0.6 0.6
0.8
1.3
0.3 ± 0.1
SIP5
4
14
1.27
0.4 ± 0.1
0.3Min.
SOP8
0.15
4페이지 | |||
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다운로드 | [ BA7755A.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 |
BA7755 | High-voltage audio head selection switch | ROHM Semiconductor |
BA7755A | High-voltage audio head selection switch | ROHM Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |