AK7841 Datasheet, PDF (16/21 Pages) Asahi Kasei Microsystems – Monaural Audio Class-D Amp with Power Booster for PiezoSpeaker

ASAHI KASEI
AKM CONFIDENTIAL
[AK7840]
Li-ion Battery
TYPICAL APPLICATION CIRCUIT
C1: 10uF
C5: 2.2uF
L1: 1.0uH
C2: 0.1uF
※ Refer to "Pre AMP"
section for details.
C6: 0.1uF
DVDDI
ERRO VFB
Power Booster
SDSEL
PDN
PG0
PG1
PG2
PD
Cont
Gain
Cont
VBAT
VCOIL
VSS2
VDD1
C8: 0.1uF _INN
INP
C7: 0.01uF
VC
VSS3
Pre
AMP
VREF
Class-D
AMP
VCN
VCP
VSS1
D1
C4: 10uF
Piezo Speaker
C3: 0.1uF
Figure. 16 External Components Examples : Single-ended Input
Li-ion Battery
C1: 10uF
C5: 2.2uF
L1: 1.0uH
C2: 0.1uF
C6: 0.1uF
DVDDI
SDSEL
ERRO VFB
Power Booster
※ Refer to "Pre AMP"
section for details.
PDN
PG0
PG1
PG2
PD
Cont
Gain
Cont
VBAT
VCOIL
VSS2
VDD1
C8: 0.1uF _INN
INP
C7: 0.01uF
VC
VSS3
Pre
AMP
VREF
Class-D
AMP
VCN
VCP
VSS1
D1
C4: 10uF
Piezo Speaker
C3: 0.1uF
Figure. 17 External Components Examples :
Differential Input with ac coupling capacitors at input
Rev.08
- 16 -
2008/3