SA9259 데이터 시트보기 (PDF) - Silan Microelectronics

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SA9259

5-CH BTL DRIVER FOR CD PLAYER WITH 5V OUTPUT VOLTAGE

Silan Microelectronics 

SA9259

(Continued)

Pin No.

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

Pin name

VOSP1

VOSP2

GND2

VILD2

VOLD1

VOLD2

VOSL1

VOSL2

VISL

LD CTL

VCC1

VCC2

VREF

VITK1

VITK2

VOTK1

VOTK2

GND3

Spindle output (+)

Spindle output (-)

Ground 2

Loading input 2

Loading output 1(+)

Loading output 2 (-)

Sled output (-)

Sled output (+)

Sled input

Loading motor speed control

Supply voltage 1

Supply voltage 2

2.5V bias

Tracking input 1 (Adjustable)

Tracking input 2

Tracking output 1 (+)

Tracking output 2 (-)

Ground 3

Pin descriptions

FUNCTION DESCRIPTION

1. MUTE

•This IC has a built in thermal shutdown circuit that mutes the output current when the chip temperature reaches

175°C (typ.). The hysteresis is set to 25°C (typ.), so the driver circuits start up again when the chip temperature

falls to 150°C (typ.).

•The mute circuit logic is active low.

•The circuit is muted during thermal shutdown and during the mute-on state .In each case, only the drivers are

muted. The output pins remain at the internal bias voltage, roughly (Vcc –Vbe) / 2.

•Bias pin (pin23) should be pulled up to more than 1.6V. In case the bias pin voltage is pulled down below 1.4V

(Typ), the output current is muted.

2. Regulator

This is a typical series regulator that generates a reference voltage internally. A PNP low saturation type

transistor must be connected.

VREF

REG

REO

Attached

PNP

VOUT

Oscillation prevention

•VREF BG is the output voltage of the bandgap standard bias circuit and is also the standard voltage of the

regulator.

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:1.3 2007.01.26

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