LB1997 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB1997

Three-Phase Brushless Motor Driver for CD-ROM Spindle Drive

SANYO -> Panasonic 

LB1997

Pin Descriptions

Pin number Pin name Pin voltage

17

VCC2

4V to 13.6V

18

VCC3

4V to 13.6V

21

VCC1

4V to 6V

1

RS

2

FG

23

UIN1

22

UIN2

25

VIN1

1.2V to

24

VIN2

VCC1–1V

27

WIN1

26

WIN2

28

VH

4

S/S

0V to VCC1

Equivalent circuit

Pin function

Source side predrive voltage supply

pin

Constant current control amplifier

voltage supply pin

Power supply pin for all circuits

except output transistors, source

predriver, and low current control

amplifier

100µA

10 kΩ

VCC1

14 15

Reverse detector pin

Forward rotation: High

Reverse rotation: Low

1 Hall element waveform Schmitt

comparator composite output

8

200Ω

10

12

25µA

A11184

U phase Hall element input and

reverse detector U phase Schmitt

VCC1 comparator input pin

25µA

Logic High indicates UIN1 > UIN2.

7

9

200Ω 11

V phase Hall element input and

reverse detector V phase Schmitt

comparator input pin

Logic High indicates VIN1 > VIN2.

25µA

W phase Hall element input and

reverse detector W phase Schmitt

A11185

comparator input pin

Logic High indicates WIN1 > WIN2.

VCC1

Hall element lower side bias voltage

75µA

supply pin

13

30 kΩ

2 kΩ

75 kΩ

17

50 kΩ

A11186

VCC1

When this pin is at 0.7V or lower, or

when it is open, all circuits are

inactive. When driving motor, set

this pin to 2V or higher.

7

SIG GND

9

FC

A11187

VCC1

2 kΩ

20

20 kΩ

5 kΩ

A11188

GND pin for all circuits except

output

Control loop frequency compensa-

tor pin. Connecting a capacitor

between this pin and GND prevents

closed loop oscillation in current

limiting circuitry.

Continued on next page

No. 5978-7/9

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