of digital audio converter IC’s
Low Power Class-D
Stereo Piezo Speaker Class-D Amp With Power Converter, ALC
AK7840
• Class-D stereo piezo speaker amp:
• Low power consumption
• High output power efficiency
• Filter-less solution
• Selectable ALC function
• Small size: .mm
chip-scale package
• Integrated power converter
• Output:
• 7.5Vpp stereo, 8.75Vpp mono
• Up to 90dB SPL (speaker dependent)
Stereo 1.8W Class-D Amp With Integrated ALC
AK7832
• Stereo Class-D speaker amp:
• 0.9W per channel into 8W
• Filter-less solution
• THD+N: 0.1% at 00mW
• Pop-noise free architecture
• Integrated pre-amp and ALC function
• Can be bypassed with I
C control
• Low power operation:
• .7V to 5V, .7mA I
dd
• Small 4-pin CSP package (.5mm
)
Speaker
Type
8W
8W
4 or 8W
4 or 8W
Piezo
Piezo
Piezo
Channels
AK7830
AK7832A
AK7833
AK7834
AK7840
AK7841
AK7845
Stereo
Stereo
Mono
Stereo
Stereo
Mono
Mono
Output
Power
1.8W
1.8W
2W
2W
Gain
(dB)
0 to +20
-26.5 to +20
-26.5 to + 20
-26.5 to + 20
SINAD
(dB)
50
50
50
50
40
40
40
ALC
Boost
Converter
Y
Power
Supply
3-5
3-5
3-5
3-5
Package
Pins
24
24
9
16
24
24
24
Type
QFN
CSP
CSP
CSP
CSP
CSP
CSP
Y
90dB SPL -26.5 to + 20
90dB SPL
90dB SPL
-4 to +8
-4 to +8
Y
Y
Y
Y
2.7 to 4.5
2.7 to 4.5
2.7 to 4.5
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