CXA1372BS View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

View to exact match

CXA1372BS

RF Signal Processing Servo Amplifier for CD Player

Sony Semiconductor 

CXA1372BQ/BS

Tracking Sled Servo

100k

0.022µ

42

TZC

TZC

100k

SSTOP

0.047µ ATSC

45

1k

BPF

1k

ATSC

22µA

TM6

TE

43

100k

TE

22k

470k

44

DFCT

680k

0.1µ TDFCT

TG1

0.033µ

TGU

8

20k

TG2 TG2

9

TM1

TM5 22µA

11µA

680K TM4

TG1

10k 66P

TM3

11µA

Tracking

10k 90k

Phase

Compensation

TM7

470k

FSET

16

100k

1k

18

SSTOP

SLO

14

SLED MOTOR

M

SL–

15

10k SL+

13

TM2

TA–

12

0.015µ

120k 8.2k

3.3µ

22µ

82k 15k

100k

TAO

11

TRACKING

COIL

510k

0.01µ

The above figure shows a block diagram of the tracking and sled servo.

The capacitor connected between Pins 8 and 9 is a time constant to cut the high-frequency gain when TG2 is

OFF. The peak frequency of the tracking phase compensation is approximately 1.2kHz when a 510kΩ

resistance connected to Pin 16.

To jump tracks in FWD and REV directions, turn TM3 or TM4 ON. During this time, the peak voltage applied to

the tracking coil is determined by the TM3 or TM4 current and the feedback resistance from Pin 12. To be

more specific,

Track jump peak voltage = TM3 (or TM4) current × feedback resistance

The FWD and REV sled kick is performed by turning TM5 or TM6 ON. During this time, the peak voltage

applied to the sled motor is determined by the TM5 or TM6 current and the feedback resistance from Pin 15;

Sled kick peak voltage = TM5 ( or TM6) current × feedback resistance

The values of the current for each switch are determined by the resistance connected between Pin 17 and

GND. When this resistance is 120kΩ:

TM3 ( or TM4) = ±11µA, and TM5 (or TM6) = ±22µA.

This current value is almost inversely proportional to the resistance and the variable range is approximately 5

to 40µA at TM3.

SSTOP is the ON/OFF detection signal for the limit SW of the linear motor's innermost track.

As is the case with the FE signal, the TE signal is switched to pass through a low-pass filter formed by the

internal resistance (470kΩ) and the capacitor connected to Pin 44.

TM-1 was ON at DFCT in the CXA1082 and CXA1182, but it does not operate in the CXA1372.

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