ESMT
Preliminary
AD51652
Elite Semiconductor Memory Technology Inc. Publication Date: Mar. 2014
Revision: 0.03
1/18
3W Mono Filter-less Class-D Audio Amplifier
Features
Supply voltage range: 2.5 V to 5.5 V
Support single-ended or differential analog
input
Low Quiescent Current
Low Output Noise
Low shut-down current
Short power-on transient time
Internal pull-low resistor on shut-down pins
Short-circuit protection
Over-temperature protection
Loudspeaker power within 10% THD+N
1.78W/ch into 8Ω loudspeaker
>3W/ch into 4Ω loudspeaker
Loudspeaker efficiency
93% @ 8Ω, THD+N=10%
85% @ 4Ω, THD+N=10%
MSOP-8L, TDFN-8L and 0.4mm ball pitch
WLCSP-9L packages
Integrated Feedback Resistor of 300kΩ
Applications
Monitor audio
PDA
Portable multimedia devices
Notebook computer
Mobile phone
Description
The AD51652 is a 3.0W mono, filter-less
class-D audio amplifier. Operating with 5.0V
loudspeaker driver supply, it can deliver 3.0W
output power into 4 Ω loudspeaker within 10%
THD+N or 2.6W at 1% THD+N.
The AD51652 is a mono audio amplifier with
high efficiency and suitable for the notebook
computer, and portable multimedia device.
Functional Block Diagram
PWM
Generator
Loudspeaker
Driver
+
-
+
-
~150k
~150k
Overload, Voltage
& Thermal
Protection
-wave
Generator
~300k
VDD
INP
INN
VOP
VON
SD
R
in
R
in
C
in
C
in
Differential
input
+
-
Gain=300k /R
in
GND
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