AW8737S Data Sheet
Nov 2017 V1.1
High efficiency, Low noise, Ultralow distortion, Constant large
volume, Upgrade Seventh generation Class K Audio Amplifier
FEATURES
Low noise：
53μV
Power amplifier overall efficiency 80%
Ultra-low distortion：0.008%
Within Lithium battery voltage range,
output
DESCRIPTION
AW8737S is designed to enhance smart mobile phone
sound quality, which is a new high efficiency, low noise,
ultra-low distortion, constant large volume, upgrading
seventh generation class K audio amplifier. Using a new
generation K-Chargepump technology, efficiency
reaches 93%, power amplifier’s overall efficiency is up to
80%, greatly prolong the mobile phone usage time. The
AW8737S noise floor is as low as to 53μV, with 97dB
high signal-to-noise-ratio(SNR). The ultra-low distortion
0.008% and unique no-crack-noise (NCN) technology
brings high quality music enjoyment.
AW8737S has 0.6W, 0.8W, 1W and 1.2W four selectable
speaker-guard output power levels, recommended using
rated power of 0.5W and above speakers. AW8737S
integrated unique NCN technology, the output power
cannot drop along with lithium battery voltage lower
down. Within lithium battery voltage range (3.3V--4.35V),
output power is constant, preventing the voice becomes
smaller and smaller during usage of cell phone.
The AW8737S uses Awinic proprietary TDD-Noise
suppression technology and EMI suppression
technology, effectively restrain TDD-Noise and EMI
interference.
AW8737S has built-in over current protection,
over-temperature protection and short circuit protection
function, effectively protect the chip. The AW8737S uses
small
0.4mm pitch
1.6mmx1.68mm CSP-14 package.
power is maintained constant
Selectable speaker-guard power level：
0.6w，
0.8W，
1W，1.2W
No-crack-noise (NCN) technology
Super TDD-Noise suppression
Excellent pop-click suppression
One wire pulse control
High PSRR：-68dB（217Hz）
ESD protection：±
6kV (HBM)
Small
0.4mm pitch
1.6mm×1.68mm CSP-14package
APPLICATIONS
Smart phone
APPLICATION DIAGRAM
VBAT
C
S1
4.7uF
C
S2
0.1uF
C
F1
2.2uF
C
F2
2.2uF
A3,B3
VDD
Pulse Input
1
D2
D1
B1
C1
C1P C1N C2P C2N
PVDD
D3
C
OUT
4.7uF
10V
A4
3
4
2
SHDN
Single-End
Input
15nF
Cin
3KΩ
Rin
Cd
220pF
A2
INN
AW8737S
A1
INP
VOP
B4
B1
C2
1nF
SPK
Cin
Rin
15nF
3KΩ
VON
D4
B2
C3
1nF
GND
C2,C4
Figure 1
All trademarks are the property of their respective owners.
AW8737S single-ended input application diagram
www.awinic.com.cn
COPYRIGHT ©2017 SHANGHAI AWINIC TECHNOLOGY CO., LTD.
1
AW8737S Data Sheet
Nov 2017 V1.1
PIN CONFIGURATION AND TOP MARK
AW8737SCSR TOP VIEW
AW8737SCSR MARKING
D
C2P
C1P
PVDD
VON
D
C
C1N
GND
GND
C
B
A
C2N
VDD
VOP
B
A
1
K37S
XXXX
2
3
4
INP
INN
VDD
SHDN
1
2
3
4
Please notice the pin number
K37S–AW8737SCSR
XXXX–Production tracking code
Figure 2
AW8737S pin diagram top view and device marking
PIN DESCRIPTION
Number
Symbol
Description
Positive audio input terminal
Negative audio input terminal
Power supply
Chip power down pin，active low；one wire pulse control；
Negative side of the external charge pump flying capacitor C2
Power supply
Positive audio output terminal
Negative side of the external charge pump flying capacitor C1
Ground
Positive side of the external charge pump flying capacitor C2
Positive side of the external charge pump flying capacitor C1
Boost charge pump output voltage
Negative audio output terminal
A1
A2
A3
A4
B1
B3
B4
C1
C2，C4
D1
D2
D3
D4
INP
INN
VDD
SHDN
C2N
VDD
VOP
C1N
GND
C2P
C1P
PVDD
VON
AWINIC CLASS K FAMILY
ITEM
PVDD(V)
Ouput
noise(μV)
Efficiency(%)
VDD=4.2V
VDD=4.2V，f=20Hz to 20kHz，input ac
grounded，8V/V,A-weighting
V
DD
=3.6V，Po=1.0W，R
L
=8Ω+33μH
TEST CONDITION
AW8736
5.8
125
75
AW8737
6.05
52
80
AW8737S
6.05
53
80
AW8738
6.05
40
83
www.awinic.com.cn
COPYRIGHT ©2017 SHANGHAI AWINIC TECHNOLOGY CO., LTD.
2
AW8737S Data Sheet
Nov 2017 V1.1
Package Thermal Resistance θ
JA
Ambient Temperature Range
Maximum Junction Temperature T
JMAX
Storage Temperature Range T
STG
Lead Temperature（Soldering 10 Seconds）
ESD Rating
（
Note
84.9℃/W
-40℃ to 85℃
165℃
-65℃ to 150℃
260℃
3
）
HBM（human body model）
CDM
MM
Latch-up
Test Condition：JEDEC STANDARD NO.78D NOVEMBER
2011
±6KV
±1.5KV
±250V
+IT：450mA
-IT：-450mA
Note 2
：
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated
under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended
periods may affect device reliability.
Note 3
：
The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Test method:
MIL-STD-883H Method 3015.8
MODE DESCRIPTION
(TA=25℃,VDD=4.2V)
AW8737S audio amplifier outer input capacitor is Cin，outer input resist is Rin，inner input resist is 16.6KΩ，
gain Av is 319.5K/(Rin+16.6K). Recommended typical application is：
1、 Cin=15nF，Rin=3KΩ，Av=16.3V/V；
2、 Cin=15nF，Rin=10KΩ，Av=12V/V；
Gain（V/V）
Mode
Enable
Signal
Rin=3KΩ
16.3
16.3
16.3
16.3
Rin=10KΩ
12
12
12
12
NCN Power（W）
RL=8Ω+
33μH
1.2
1
0.8
0.6
RL=6Ω+
33μH
1.6
1.3
1.0
0.8
NCN
Function
Mode1
Mode2
Mode3
Mode4
www.awinic.com.cn
COPYRIGHT ©2017 SHANGHAI AWINIC TECHNOLOGY CO., LTD.
5
电源技术
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
