ALC5642-VF
Datasheet
7. Function Description
7.1. Power
There are different power types in ALC5642. DBVDD is for digital I/O power, DCVDD is for digital
core power, AVDD and DACREF are for analog power, CPVDD is for charge pump power, MICVDD is
for MICBIAS power and SPKVDD is for speaker amplifier power.
The power supplier limit condition are DBVDD ≧ DCVDD and SPKVDD ≧ MICVDD > AVDD =
DACREF = CPVDD, AVDD ≧ DCVDD, and for the best performance, our design setting is shown as
below.
Table 5. Power Supply for Best Performance
Power
DBVDD
DCVDD
AVDD
DACREF
CPVDD
MICVDD SPKVDD
3.3V 5.0V
Setting
1.8V
1.2V
1.8V
1.8V
1.8V
*1.2V DCVDD can be generated by internal LDO or supplied by external 1.2V power.
To prevent all power down leakage, there are two settings for power supply. At these conditions, the
leakage will be smaller. First setting is to power on all power pin. Second setting is to only power on
SPKVDD and others are removed. The detail setting is shown as following table.
Table 6. Power Supply Condition for Power Down Leakage
Power
DBVDD
DCVDD
AVDD
DACREF
CPVDD
MICVDD SPKVDD
Setting-1
Supplied
Supplied
(or N/A)*
N/A
Supplied
Supplied
Supplied
Supplied
(or N/A)*
N/A
Supplied
Setting-2
Setting-3
N/A
N/A
N/A
N/A
Supplied
N/A
Supplied
Supplied
Supplied
Supplied
Supplied
Supplied
(or N/A)*
(or N/A)*
“*” means DCVDD or MICVDD can be supplied by internal LDO and need to turn off when into power down mode.
Multi-Channel Audio Hub/CODEC with embedded Voice
DSP and SounzRealTM Digital Sound Effect
11
Rev. 0.93
REALTEK [ Realtek Semiconductor Corp. ]
