LB11872H(2002) 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LB11872H
(Rev.:2002)

Three-Phase Brushless Motor Driver for Polygonal Mirror Motors

SANYO -> Panasonic 

Pin Circuits and Functions

Pin No. Pin

Function

LB11872H

Equivalent circuit

Vcc

Hall effect sensor signal inputs

2

IN2+ These inputs are high when IN+ is greater than IN- and

3

IN2– low when IN- is greater than IN+.

4

IN1+ Insert capacitors between the IN+ and IN– pins to

reduce noise.

300Ω

5

IN1–

357

An amplitude of over 50 mA p-p and under 350 mVp-p is

6

IN3+ desirable for the Hall input signals.

7

IN3– Kickback can occur in the output waveform if the Hall

input amplitude is over 350 mVp-p.

300Ω

246

AGC amplifier frequency characteristics correction.

8

AGC Insert a capacitor (about 0.022 µF) between this pin and

ground.

VREG

300Ω

8

9

MN

Monitor pin

This pin should be left open in normal operation.

VREG

Used for both initial reset pulse generation and as the

12

CSD reference time for constraint protection circuits.

Insert a capacitor between this pin and ground.

300Ω

12

FG pulse output.

14

FG

This is an open-collector output.

Start/stop control.

Low: Start 0 to 1.0 V

15

S/S

High: Stop 2.0 V to VREG

This pin goes to the high level when open.

VREG

14

VREG

33kΩ

5kΩ

15

30kΩ

Continued on next page.

No. 7257 -7/13

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