AK4213 Datasheet, PDF (25/38 Pages) Asahi Kasei Microsystems – Mono Class-D SPK-Amp with Stereo Cap-less HP-Amp

[AK4213]
2) SPK-Amp
Power Supply
PDN pin
PMVCM bit
PMOSC bit
Clock Input
PMVx bits
Input Volume
Output State
PMMSP bit
PMSPK bit
SPGA bits
(1)
(2)
Don’t care
≥ 0s
Hi-Z
(4)≥ 0s
Default
(3)
VCOM
(8)≥ 500us
(5)≥ 1.6ms
xxH
Default
(5) ≥ 1.6ms
xxH
Don’t care
Hi-Z
Default
ALC bit
(6)
(6)
ALC state
SPP/SPN pins
Disable
Enable
Disable
Enable
(7)
(7)
Hi-Z
Normal
Hi-Z
Normal
Figure 18. SPK-Amp Power-up/down Sequence Example
Disable
Hi-Z
(1) After Power Up, PDN pin = “L” Æ “H”. “L” time of 150ns or more is needed to reset the AK4213.
The power must be ON in the state of PDN pin = “L”. The PDN pin must be set to “H” after power supply
(AVDD, TVDD, PVDD, SVDD) are ON.
(2) Power-up of VCOM and the internal oscillator: PMVCM= PMOSC: “0” Æ “1”
SD3-1 bits must be set during this period.
(3) Power-up of input volume: PMVx bit = “0” Æ “1”
Input volume setting (L1V3-0, L2V3-0, L3V3-0, R1V3-0, R2V3-0, R3V3-0 bits)
Input path setting (SPKL3-1, SPKR3-1 bits)
Input volume block is powered-up within 26.3ms (max.). Input path and volume can be set when input volume
block is powered-up.
(4) Power-up of SPK-Amp and SPK-Amp Mixer & Selector: PMMSP = PMSPK bits =“0”Æ “1”
(5) SPGA5-0 bits setting: The setting of SPKG5-0 and ALC bits is enabled at 1.6ms or more after PMSPK bit is set to
“1”.
(6) ALC setting: ALC is enabled at 30ms (max.). Refer to “Registers set-up sequence at ALC operation”.
(7) Speaker-Amp goes to the normal operation at 48ms (max.) after PMSPK bit is changed to “1”.
(8) Once Speaker-Amp is powered-down, Speaker-Amp can be powered-up again at 500μs or more lately. When
PMMSP, PMSPK bit = “1” Æ “0”, before PMVCM,PMOSC bit = “1” Æ “0”, please wait more than 0.5ms.
MS0949-E-01
- 25 -
2008/07