MOSA

MS6330

16-Bit Stereo Audio DAC & HP Driver with PD

REV 1.0

7

www.mosanalog.com

POP NOISE REDUCTION AS POWER-ON-OFF

It is effective to prevent the power-on-off pop noise by controlling /PD and PDPR pins. The better control timing is as

below. Please refer to the circuit diagram in the page 8.

VDD

Power-on sequence

Power-off sequence

PDPR

>350ms

PD

>100ms

Music

>100ms

In power-on sequence, the initial state of /PD is low and PDPR is high, and then PDPR sets low after the /PD sets high

at least 100ms. In power-off sequence, enable PDPR function and delay 100ms, and then sets low to /PD.

POWER DOWN SEQUENCE

control timing is as below.

Disable Power-down

Enable Power-down

PDPR

>350ms

PD

>100ms

Delay time

Music

The delay time is decided by the value of the bypass capacitor. It is 5second for 10uF bypass capacitance.