TA84005F/FG

2004-08-10

8

<Synchronous rectification PWM>

Connecting the TA84005F/FG to the TB6548F/FG controls the synchronous rectification PWM.

At chopping OFF, power dissipation is reduced by operating the Pch-MOS in reverse and regenerating the

motor’s current.

<Timing Chart>

When controlling synchronous rectification PWM

VM

ON

Pch-MOS

OFF

<Coil current route>

When chopping is ON

When chopping is OFF

IN-P

IN-N