BD6971FS datasheet(2/16 Pages) ROHM

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Datasheet

BD6971FS

TSZ02201-0H1H0B100160-1-2

28.JUL.2012 Rev.002

www.rohm.com

TSZ22111・15・001

●Pin configuration

●Pin description

P/No.

T/Name

Function

Speed pulse signal output terminal

H–

Hall – input terminal

Hall bias terminal

H+

Hall + input terminal

Output current detection terminal

N.C.

Non-connecting terminal

OUT2

Motor output terminal 2

RNF

Output current detecting resistor

connecting terminal (motor ground)

N.C.

Non-connecting terminal

OUT1

Motor output terminal 1

Vcc

Power supply terminal

REF

Reference voltage output terminal

Output duty controllable input terminal

MIN

Minimum output duty setting terminal

OSC

Oscillating capacitor connecting

terminal

GND

Ground terminal (signal ground)

N.C. must open on the substrate pattern, because this is a

non-connecting terminal in IC.

●Block diagram

●I/O truth table

Hall input

Driver output

H+

H–

OUT1

OUT2

Hi-Z

H; High, L; Low, Hi-Z; High impedance

FG output is open-drain type.

OSC

MIN

CURRENT

LIMIT COMP

Vcl

REF

OUT2

H+

H–

OUT1

Vcc

GND

TSD

HALL

BIAS

SIGNAL

OUTPUT

CONTROL

LOGIC

OSC

REF

QUICK

START

RNF

PRE-

DRIVER

PWM

COMP

PWM

COMP

HALL

AMP

HALL

COMP

PWM SOFT

SWITCHING

LOCK

PROTECT

N.C.

Fig.2 Block diagram

MIN

REF

OUT2

H+

H–

OUT1

Vcc

OSC

GND

RNF

N.C.

Fig.1 Pin configuration

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