BA6901F(Old_V) Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BA6901F
(Rev.:Old_V)

2-Phase half-wave motor pre driver for fan motor

ROHM Semiconductor 

Motor driver ICs

BA6901F

!Circuit operation

•Lock detect circuit, automatic restart circuit

Charge and discharge time at motor lock condition varies with the value of external capacitor at LD terminal, and is

given by the following equation.

Ton (Charge time) = C × (VLDCL−VLDCP)

ILDC

Toff (Discharge time) = C × (VLDCL−VLDCP)

ILDD

C : Value of capacitor at LD terminal

VLDCL : Clamp voltage of capacitor

(2.40V

VLDCP : Comparison voltage of capacitor (0.60V

:

ILDC : Charge current of capacitor

(5.0µA

ILDD Discharge current of capacitor (0.5µA

Typ.)

Typ.)

Typ.)

Typ.)

The following value shows charge time and discharge time at C=1.0µF for reference.

Charge time=0.36sec. (Output : ON)

Discharge time=3.60sec. (Output : OFF)

Shows timing chart of LD terminal.

H+

A1

VLDCL

LD

VLDCP

AL

ALB

HO

Toff

Ton

Output Tr. OFF

ON

HIGH(Open collector)

LOW

Depend on the hall output

Motor lock Detect lock

Lock cancel

Reset ordinary motion

5/10

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