SNC207S

Direct Drive Speech Controller

Ver: 0.3

Sept 20, 2007

7

PWM: A PWM (pulse width modulation) circuit is built-in SNC207S. PWM can

convert input digital data into pulse trains with suitable different pulse width. The

maximum resolution of PWM is 7 bits. Two huge output stage circuits are designed

in SNC207S. With this advanced circuit, the chip is capable of driving speaker

directly without external transistors.

The recommended application circuit is

illustrated as follows.

PWM Output

BUO1/VO

BUO2