bh7272kv ROHM Co. Ltd., bh7272kv Datasheet - Page 2

• Manufacturer Part Number: bh7272kv
• Description: Two-channel Amplifier Digital Vcrs
• Manufacturer: ROHM Co. Ltd.

•
•
2
Video ICs
Make sure that the voltages at V
Be especially careful of the V
The playback system has high gain, so take care to ensure that the output does not find its way back to the input.
Block diagram
V
CC
Pin No.
/ GND pins
14
19
20
26
38
37
47
16
8
5
REC BTL A I0adj
HEAD SW CTRL
PB 2nd OUT A
PB 2nd OUT B
PB SW – OUT
PB SW + OUT
PB 2nd IN A
PB 2nd IN B
Vcc 4.9V
Vcc 4.9V
PB “H”
Pin name
V
V
V
V
V
GND
CC
CC
CC
CC
CC
GND
GND
GND
GND
GND
4.9V
4.9V
4.9V
4.9V
3.0V
CC
37
38
39
40
41
42
43
44
45
46
47
48
and GND for the first-stage amplifier.
CC
and GND pins does not sway.
36
1
IAMP
2nd
3rd
REC current amplifier
As above
Bias, REC limiter amplifier
Bias, control logic
REC limiter amplifier
PB amplifier, PB AGC, peak amplifier
As above
PB first-stage amplifier
PB first-stage amplifier, REC current amplifier
Control logic
35
2
PRE
34
3
IAMP
33
4
32
5
BH7272KV
31
6
AGC
10k
1k
30
7
DET
10k
1k
29
Balance
8
28
9
Function
VAMP
IAMP
27
10
Bias
PRE
Balance
BF
26
11
LIMIT
IAMP
25
12
24
23
22
21
20
19
18
17
16
15
14
13
LIMIT LEVEL adj
LIMIT Vth adj
REC LIMIT – OUT
REC LIMIT + OUT
GND
Vcc 4.9V
REC GATE
REC “H”
Vcc 3.0V
BIAS FILTER
Vcc 4.9V
REC BTL B I0adj
BH7272KV