APA2036
Stereo 2.6W Audio Power Amplifier
Features
General Description
The APA2036 is a stereo audio power amplifier in a
TQFN4x4-16 package. To simplify the audio system de-
sign in notebook computer applications, the APA2036
combines a stereo bridge-tied mode for speaker drive
and a stereo single-end mode for headphone drive into a
single chip, where both modes are easily switched by the
SE/BTL input control pin signal. When the APA2036 is in
the BTL mode with 5V supply voltage, it is capable of
delivering 2.4W/2.0W/1.3W of continuous output power
per channel into 3Ω/4Ω/8Ω load (Speaker) with less than
1% THD+N respectively. When the APA2036 operates in
the single-ended mode, it is capable of delivering 160mW/
85mW of continuous output power per channel into 16Ω/
32Ω load (Headphone).
The APA2036 also serves low-voltage applications well.
The APA2036, with 3.3V supply voltage, provides 900mW
(at 1% THD+N) per channel into 4Ω load. Both of the
depop circuitry and the thermal shutdown protection cir-
cuitry are integrated in the APA2036. The depop function
reduces pops and clicks noise during power on/off and
enable/shutdown processes. The thermal protection pro-
tects the chip from being destroyed by over-temperature
failure. For power sensitive applications, the APA2036 also
features a shutdown function which reduces the supply
current only 0.5µA (typical).
THD+N vs. Output Power
10
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Operating Voltage: 3.0 ~ 5.5V
Low Shutdown Current
– I
DD
= 0.5µA (typical) at V
DD
= 5V
Selectable Bridge-Tied Load (BTL) or Singled-
Ended (SE) Operation
Output Power (BTL) at 1% THD+N, V
DD
= 5V
– 2.4W at R
L
= 3Ω
– 2.0W at R
L
= 4Ω
– 1.3W at R
L
= 8Ω
Output Power (SE) at 1% THD+N, V
DD
= 5V
– 160mW at R
L
= 16Ω
– 85mW at R
L
= 32Ω
Depop Circuitry Integrated
Thermal and Over-Current Protections
Short Circuit Protection
Space Saving Packaging
– 4mmx4mm 16-Lead Thin QFN Package
(TQFN4X4-16)
Lead Free Available (RoHS Compliant)
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Applications
Handsets
Portable multimedia devices
Notebooks
Simplified Application Circuit
LOUTP
V
DD
=5V
R
L
=4Ω
C
i
=1µF
BW<80KHz
BTL mode
1
THD+N (%)
L-CH
Input
LINN
LBYPASS
F
in
=20KHz
LOUTN
SE-BTL
Signal
APA2036
R-CH
Input
RINN
RBYPASS
ROUTN
ROUTP
0.1
F
in
=20Hz
F
in
=1KHz
0.01
10m
100m
1
2
4
Output Power (W)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Feb., 2008
1
www.anpec.com.tw
ANPEC [ ANPEC ELECTRONICS COROPRATION ]
