TB6548F

2001-08-28

6

5.

Positional Variation

Since positional detection is performed in synchronization with PWM signal, positional variation occurs

in connection with the frequency of PWM signal. Be especially careful when the IC is used for high-speed

motors.

Variation is calculated by detecting at two consecutive rising edges of PWM signal.

PWM signal

Output voltage

of TA84005F

Pin voltage

Positional signal

Ideal detection timing

Actual detection timing

Reference voltage