BA6407 Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BA6407

2-phase half-wave motor driver

ROHM Semiconductor 

Motor driver ICs

FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 12V)

BA6407AF

FLock detection

The automatic restart circuit detects a motor lock condi-

tion and automatically turns off the output current. When

the lock condition is cleared, the IC automatically restarts

and allow the motor to run.

In the BA6407AF, automatic restart is performed as fol-

lows.

A motor lock condition is detected when the Hall signal

stops switching.

The output is ON when the LD pin is being charged, and

OFF when the pin is being discharged.

S The AL pin is ON during normal operation, and OFF

when the motor is locked.

S The AL pin is an open collector output.

Output ON time (TON) and OFF time (TOFF) determined by

the LD capacitor

TON (Charge time)= C S (VLDCL*VLDCP)

ILDC

TOFF (Discharge time)=

C S (VLDCL*VLDCP)

ILDD

where

(Typical value)

C is the capacitance of the LD-pin external capacitor,

VLDCL is the LD-pin clamp voltage (2.48V),

VLDCP is the LD-pin comparator voltage (0.99V),

ILDC is the LD-pin charge current (3.4µA),

ILDC is the LD-pin discharge current (0.79µA).

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