AK7841 Datasheet, PDF (13/21 Pages) Asahi Kasei Microsystems – Monaural Audio Class-D Amp with Power Booster for PiezoSpeaker

ASAHI KASEI
AKM CONFIDENTIAL
[AK7840]
※）Wave forms are overlapping.
5
V_in=2V_pp
4
3
VBAT=4.5V
VBAT=3.6V
VBAT=2.7V
2
1
※）Wave forms are overlapping.
20
V_out=2Vrms
VBAT=4.5V
15
VBAT=3.6V
VBAT=2.7V
10
5
0
0.1001
100.10
11k
Frequency (Hz)
10k 20k 110000k
Figure. 9 Output Amplitude vs. Frequency
0
0.¹0⁰1
1₀0_.10
1₁k
1₁0₀k 20k
Frequency (Hz)
1₁0₀0₀k
Figure. 10 Frequency Response
150
F_in=1kHz
100
VBAT=3.6V
VBAT=2.7V
50
VBAT=4.5V
0
0
1
2
3
4
5
Output Voltage (Vrms)
Figure. 11 Supply Current vs Output Voltage
Rev.08
- 13 -
2008/3