AN8481SB データシートの表示（PDF） - Panasonic Corporation

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AN8481SB

Spindle motor driver IC for optical disk

Panasonic Corporation 

AN8481SB

I Block Diagram

FG

comparator

21

REF

VREG 19

Lower

side

VCE

detection

Amp.

Amp.

Upper side

distribution

Lower side

distribution

Thermal

protection

circuit

VTL

13 VCC

PCS 18

SWB 17

16

SWG

GND 14

Amp.

Direction changeover

Direction

detection

12 PCI

Absolute

value

Logic

ER

EP = ER × EA

Start/stop

Triangular

Detection

wave

Hall

EA

bias

Hall amp. matrix

8 S/S

I Pin Descriptions

Pin No. Symbol

Description

Pin No. Symbol

Description

1

H1+ Hall element-1 positive input pin

11

EC Torque command input pin

2

H1− Hall element-1 negative input pin

12

PCI Current feedback phase compensation pin

3

H2+ Hall element-2 positive input pin

13

VCC Supply voltage pin

4

H2− Hall element-2 negative input pin

14

SG Signal GND pin

5

H3+ Hall element-3 positive input pin

15

FC Triangular wave oscillation pin

6

H3− Hall element-3 negative input pin

16 SWG SW-REG system GND pin

7

VH Hall bias pin

17 SWB SW-REG driving pin

8

SS Start/stop changeover pin

18

PCS SW-REG system phase compensation pin

9

FG FG signal output pin

19

VREG Fixed power supply pin

10

ECR Torque command reference input pin 20

VM Motor supply voltage pin

2

SDD00007BEB

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