KD-S7R
1-22
LA6557-X(IC501) : Servo BTL driver
1 2 3 4 5 6 7
8 9 1 0 1 1 1 2 1 3 1 4
28 27 26 25 24 23 22
21 20 19 18 17 16 15
- +
- +
- +
- +
- +
- +
- +
FR
FR
Signal system
power
CH1,2
POWER
POWER
Output
control
MUTE is as follows
High : output ON
Low : output OFF
Input
11k
11k
11k
11k
22k
22k
22k
22k
Mute
Level
shift
Level
shift
Level
shift
Level
shift
CH3,4,5
CH5
CH4
CH3
CH2
CH1
VCC2 V05- V05+ V04+ V04- V03+ V03- FR V02+ V02- V01+ V01- VCC1 VIN1 VIN1G
REW FWD S-GND MUTE VIN4 VING4 VCC-S FR
VREF-IN REG-OUT REG-IN
VIN3G VIN3 VIN2G VIN2
Thermal shutdown
1. Block diagram
2.Pin function
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
VCC2
V05-
V05+
V04+
V04-
V03+
V03-
V02+
V02-
V01+
V01-
VCC1
VIN1
VIN1G
VIN2
VIN2G
VIN3
VIN3G
REG-IN
REG-OUT
VRFE-IN
VCC-S
VIN4G
VIN4
MUTE
S-GND
FWD
REV
Power for channels 3,4, and 5 (VCC1 and VCC-S short-circuited)
Loading output (-)
Loading output (+)
Output pin (+) for channel 4
Output pin (-) for channel 4
Output pin (+) for channel 3
Output pin (-) for channel 3
Output pin (+) for channel 2
Output pin (-) for channel 2
Output pin (+) for channel 1
Output pin (-) for channel 1
Power for channels 1 and 2 (BTL), (VCC-S and VCC2 short-circuited)
Input pin for channel 1
Input pin for channel 1 (for gain control)
Input pin for channel 2
Input pin for channel 2 (for gain control)
Input pin for channel 3
Input pin for channel 3 (for gain control)
Regulator pin (External PNP base)
Regulator pin (External PNP collector)
Reference voltage input pin
Signal system power (VCC1 and VCC2 short-circuited)
Input pin for channel 4 (for gain control)
Input pin for channel 4
Output ON/OFF, channels 1 to 4 (BTL AMP)
Signal system GND
5CH(VL0) Output change pin (FWD), Logic input for loading block
5CH(VL0) Output change pin (REW), Logic input for loading block
Pin
No.
Pin
Name
Description