HT8320MTET [YONGFUKANG]
Built-in high efficiency adaptive dual charge pump boost, anti-sharp distortion function, D/AB switching 2*4.5W dual channel audio power amplifier;
| 型号： | HT8320MTET |
| 厂家： | 
Shenzhenshi YONGFUKANG Technology co.,LTD |
| 描述： | Built-in high efficiency adaptive dual charge pump boost, anti-sharp distortion function, D/AB switching 2*4.5W dual channel audio power amplifier |
| 文件： | 总19页 (文件大小：1967K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
HT8320
内置电荷泵升压音频功放
内置高效自适应双电荷泵升压，防削顶失真功能，
D/AB切换的2*4.5W双声道音频功率放大器
◼ 特点
◼ 概述
HT8320是一款D类双通道音频功率放大器，在
VBAT=4.2V、THD+N=10%，4Ω负载条件下能连续输
出2*4.5W功率。该D类功放的电源电压由内置的自适
应双电荷泵升压模块提供。该升压模块在低功率时不
升压，可有效提升电池的播放时间。
・4种防削顶失真功能(Anti-Clipping Function, ACF)
・自适应电荷泵升压功能
・内部固定28dB增益
・输出功率
2*4.5W (VBAT=4.2V, RL=4Ω, THD+N=10%)
2*3.5W (VBAT=3.7V, RL=4Ω, THD+N=10%)
2*2.7W (VBAT=3.3V, RL=4Ω, THD+N=10%)
・效率
81% (VBAT=3.7V, RL=4Ω, 0.4W)
73% (VBAT=3.7V, RL=4Ω, 1W)
・电源
HT8320的最大特点是防削顶失真（ACF）输出
控制功能，可检测并抑制由于输入音乐、语音信号幅
度过大所引起的输出信号削顶失真（破音），也能自
适应地防止在升压电压下降所造成的输出削顶，显著
提高音质，创造非常舒适的听音享受，并保护扬声器
免受过载损坏。其具有4种不同的ACF模式，可针对
不同应用场合。同时芯片还具有ACF-Off 模式。
-升压输入VBAT：2.7V至5.5V
-升压输出CPOUT：6.4V
・静态工作电流：7mA
・关断电流：<1uA
・AB/D类可切换
HT8320具有AB类和D类的自由切换功能，在受
到D类功放EMI干扰困扰时，可随时切换至AB类音频
功放模式（此时电荷泵升压功能关闭）。
・免滤波器数字调制，直接驱动扬声器
・保护功能:过流/过热/欠压异常保护功能
・无铅封装， TSSOP24-PP
HT8320内部集成免滤波器数字调制技术，能够
直接驱动扬声器，并最大程度减小脉冲输出信号的失
真和噪音。输出无需滤波网络，极少的外部元器件节
省了系统空间和成本，是便携式应用的理想选择。
◼ 应用
此外，HT8320内部固定28dB增益，内置的关断
功能使待机电流最小化，还集成了输出端过流保护、
片内过温保护和电源欠压异常保护等功能。
・智能音响
・便携式音频设备
・无线音响
・智能手机
◼ 典型应用图
CFLY1
4.7uF
CFLY2
4.7uF
C1P
C1N
470uF
C2P
C2N
CPOUT1
470uF
VBAT
2*10uF
2*1uF
2*1uF
PVBAT1
CPOUT2
PVDD1
PVDD2
PVBAT2
AVBAT1
AVBAT2
10R
2*1uF
ACF = AVBAT, ACF disabled
Otherwise, ACF enabled
CTRL = L, Shutdown
2*10uF
2*1uF
ACF
CTRL
0-GND
CTRL = 1.1-1.5V, Class AB
CTRL > 1.8V, Class D
BYPASS
1uF
OUT1P
OUT1N
IN1P
IN1N
IN2P
IN2N
OUT2P
OUT2N
GND
RIN
CIN
TEL:0755-82863877 13242913995 E-MAIL:panxia168@126.com http://www.szczkjgs.com
HT8320
Audio Amplifier Integrated with Charge Pump
2*4.5W Anti-Clipping Stereo Class D/AB Audio Amplifier with
Adaptive Charge Pump Regulator
◼ FEATURE
◼ GENERAL DESCRIPTION
HT8320 is a Class D stereo audio amplifier which
can deliver continuous 2*4.5W output power into a
4Ω speaker with 4.2V battery supply when THD+N
= 10%. The class D audio amplifier’s power supply
is adaptively boosted by the integrated charge
pump regulator which only works while the output
power is big enough. This will significantly extend
the playing time in battery supply applications.
HT8320 features Anti-Clipping Function (ACF)
which detects output signal clip due to the over
input signal and suppresses the output signal clip
automatically. Also, it can adapt the output clip
caused by power supply voltage down. It can
significantly improve the sound quality, creating a
very comfortable musical enjoyment, and to protect
the speakers from overload damage. It provides 4
different ACF modes and ACF OFF mode to adjust
different applications.
・4 modes of Anti-Clipping Function (ACF)
・Adaptive Charge Pump Regulator
・Maximum Voltage Gain: 28dB
・Output Power
2*4.5W (VBAT=4.2V, RL=4Ω, THD+N=10%)
2*3.5W (VBAT=3.7V, RL=4Ω, THD+N=10%)
2*2.7W (VBAT=3.3V, RL=4Ω, THD+N=10%)
・Efficiency
81% (VBAT = 3.7V, RL = 4 Ω, Po = 0.4W)
73% (VBAT = 3.7V, RL = 4 Ω, Po = 2.0W)
・Power Supply
-Input VBAT：2.7V to 5.5V
-Output CPOUT：6.4V
・Quiescent Current: 7mA
Class AB amplifier mode is also available for
HT8320. Once the EMI Interference from class D
and Boost Converter becomes an annoying
problem, HT8320 can be changed into Class AB
mode.
HT8320 has a filter-less modulation circuit
which directly drives speakers while realizes low
distortion and low noise characteristics. Thanks to
filter-less, circuit design with fewer external parts
can be made in portable applications.
HT8320 has an internal gain of 28dB and an
independent Shutdown function which can
minimize the power consumption. As for protection
function, over current protection function for
speaker output terminals, over temperature
protection function, and low supply voltage
malfunction preventing function are also prepared.
・Shutdown Current: <1uA
・Class AB / Class D selectable
・Filter-less Modulation, Eliminating Output Filter
・Over Current Protection, Thermal Protection,
Low voltage malfunction prevention function
included
・Pb-Free Packages , TSSOP24-PP
◼ APPLICATIONS
・Smart Speakers
・Wireless Speakers
・Smart Phones
・Portable Audio Devices
◼ TYPICAL APPLICATION
CFLY1
4.7uF
CFLY2
4.7uF
C1P
C1N
470uF
C2P
C2N
CPOUT1
470uF
VBAT
2*10uF
2*1uF
2*1uF
PVBAT1
CPOUT2
PVDD1
PVDD2
PVBAT2
AVBAT1
AVBAT2
10R
2*1uF
ACF = AVBAT, ACF disabled
Otherwise, ACF enabled
CTRL = L, Shutdown
2*10uF
2*1uF
ACF
CTRL
0-GND
CTRL = 1.1-1.5V, Class AB
CTRL > 1.8V, Class D
BYPASS
1uF
OUT1P
OUT1N
IN1P
IN1N
IN2P
IN2N
OUT2P
OUT2N
GND
RIN
CIN
HT8320
Audio Amplifier Integrated with Charge Pump
◼ TERMINAL CONFIGURATION
1
2
3
4
24
PVDD1
OUT1N
PVBAT1
CPOUT1
C1P
OUT1P
23
CTRL
22
21
20
19
18
17
16
15
14
13
IN1N
IN1P
5
6
7
8
AVBAT1
BYPASS
IN2N
C1N
0-GND
OUT2N
OUT2P
IN2P
9
PVDD2
CPOUT2
10
11
12
PVBAT2
C2P
AVBAT2
ACF
C2N
GND
TSSOP24-PP Top View
1
◼ TERMINAL FUNCTION
SOP
Terminal
No.
ESD
Protection
Name
I/O
Description
0
1
2
3
4
5
6
7
GND
PVDD1
OUT1N
PVBAT1
CPOUT1
C1P
GND
--
Ground
POWER
PN
PN
PN
PN
PN
PN
PN
Power supply for audio amplifier 1
O
Negative BTL audio output 1
POWER
Power supply for the charge pump regulator 1
Boosted voltage output of the charge pump regulator 1
Flying capacitor positive terminal for charge pump 1
Flying capacitor negative terminal for charge pump 1
Negative BTL audio output 2
POWER
I
I
C1N
OUT2N
O
8
9
10
11
12
13
OUT2P
CPOUT2
PVBAT2
C2P
C2N
GND
O
PN
PN
PN
PN
PN
--
Positive BTL audio output 2
POWER
POWER
Boosted voltage output of the charge pump regulator 2
Power supply for the charge pump regulator 2
Flying capacitor positive terminal for charge pump 2
Flying capacitor negative terminal for charge pump 2
GND
I
I
GND
ACF selection terminal. ACF is disabled when it is pulled to
VBAT directly.
14
ACF
I
PN
15
16
17
18
AVBAT2
PVDD2
IN2P
POWER
POWER
PN
PN
PN
PN
Analog power supply 2
Power supply for audio amplifier 2
Positive audio input terminal 2
I
I
IN2N
Negative audio input terminal 2
Analog reference terminal, connecting a 1uF capacitor to
ground
19
BYPASS
O
PN
20
21
22
AVBAT1
IN1P
IN1N
POWER
PN
PN
PN
Analog power supply 1
Positive audio input terminal 1
Negative audio input terminal 1
I
I
Mode selection terminal. When it is pulled low, the device
goes into shutdown mode.
Positive BTL audio output 1
23
24
CTRL
I
PN
PN
OUT1P
O
1
I: Input; O: Output
HT8320
Audio Amplifier Integrated with Charge Pump
◼ ORDERING INFORMATION
Operating
Container/MOQ
Part Number
Package Type
Marking
Temperature Range
HT8320MTET
HT8320MTER
TSSOP24-PP
TSSOP24-PP
HT8320MTE
HT8320MTE
-40℃～85℃
-40℃～85℃
Tube/38PCS
Tape and Reel/3000PCS
HT8320
Audio Amplifier Integrated with Charge Pump
⚫ ELECTRICAL CHARACTERISTICS2
⚫ Absolute Maximum Ratings3
PARAMETER
Supply voltage range (PVBAT, AVBAT)
Input voltage range (IN+, IN-)
SYMBOL
VBAT
VIN
MIN
-0.3
－0.6
-40
MAX
UNIT
V
7
AVBAT＋0.6
85
V
Operating temperature range
TA
℃
Operating junction temperature range
Storage temperature range
TJ
-40
150
℃
TSTG
-50
150
℃
⚫ Recommended Operating Conditions
PARAMETER
Supply voltage range (PVBAT, AVBAT)
Operating temperature range
Speaker resistance
SYMBOL
CONDITION
MIN
TYP
3.7
25
MAX
UNIT
VBAT
Ta
2.7
-40
5.5
85
V
℃
Ω
RL
4
⚫ Electrical Specifications
General Specifications
Condition: VBAT = 2.7~5.5V, TA = 25℃, Unless otherwise specified.
PARAMETER
SYMBOL
CONDITION
MIN
2.7
TYP
3.7
MAX
5.5
UNIT
V
Supply voltage range
(PVBAT, AVBAT)
VBAT
Power-up threshold voltage
Power-off threshold voltage
VUVLH
VUVLL
2.5
V
V
2.4
1
3.6V, No input, No load, Class D
3.6V, No input, No load, Class AB
7
mA
mA
uA
dB
kΩ
dB
V
Quiescent current
IBAT
11
Shutdown current
ISD
PSRR
Rin
0.1
-80
20
Power ripple rejection ratio
Input impedance per input pin
Closed-loop voltage gain
VBAT=3.7V，217Hz
Av
28.5
Shutdown mode
0
0.4
1.5
Class AB mode, Charge Pump
disabled
Class D mode, Charge Pump
enabled
CTRL terminal setting
threshold voltage
1.1
V
VCTRL
1.8
AVBAT
V
Start-up time4
tON
120
160
ms
℃
Over temperature protection
point
OTP
Charge Pump Specifications
Condition: VBAT = 2.7~5.5V, TA = 25℃, Unless otherwise specified.
PARAMETER
SYMBOL
CPOUT
fSW_CH
CONDITION
MIN
6.2
TYP
6.4
MAX
6.6
UNIT
V
Charge pump output voltage
Switching frequency
Max output current
1600
3
kHz
A
ICPOUT
VBAT=4.2V
2
3
Depending on parts and PCB layout, characteristics may be changed.
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.
4
Power on, shutdown release, or the switching between Class AB and Class D
HT8320
Audio Amplifier Integrated with Charge Pump
Class D Audio Amplifier Specifications
Condition: VBAT = 3.7V, TA = 25℃, CIN = 1uF, RIN = 0k, Av = 28.5dB, RL = 4Ω, fIN = 1kHz, CVBAT = 2*1uF//2*10uF//470uF,
COUT = 2*1uF//2*10uF//470uF, CFLY1 = CFLY2 =4.7uF, ACF off, Unless otherwise specified.
PARAMETER
SYMBOL
CONDITION
THD+N = 10%
MIN
TYP
2*4.5
2*3.9
2*3.5
2*3.3
2*2.7
2*2.5
MAX
UNIT
VBAT=4.2V
VBAT=3.7V
VBAT=3.3V
THD+N = 1%
THD+N = 10%
THD+N = 1%
THD+N = 10%
THD+N = 1%
Output Power
PO
W
Total Harmonic Distortion +
Noise
THD+N
VN
PO=1W RL=4Ω, f=1kHz
0.07
120
84
%
µV rms
dB
f=20Hz~20kHz, A weighted,
Av=28.5dB
f=20Hz~20kHz, A weighted,
Av=28.5dB, Po = 1W
Output Noise
Signal to Noise Ratio
Offset Voltage
SNR
VOS
±10
81
mV
%
VBAT=3.7V, Po=2*0.4W
VBAT=3.7V, Po=2*2W
Efficiency
η
73
%
Switching frequency
fSW_D
330
kHz
Class AB Audio Amplifier Specifications
Condition: VBAT = 3.7V, TA = 25℃, CIN = 1uF, RIN = 0k, Av = 28.5dB, RL = 4Ω, fIN = 1kHz, CVBAT = 2*1uF//2*10uF//470uF,
COUT = 2*1uF//2*10uF//470uF, CFLY1 = CFLY2 =4.7uF, ACF off, Unless otherwise specified.
PARAMETER
SYMBOL
CONDITION
VBAT=4.2V
MIN
TYP
2*2
MAX
UNIT
f=1kHz, RL=4Ω,
VBAT=3.7V
VBAT=3.3V
VBAT=4.2V
VBAT=3.7V
VBAT=3.3V
2*1.5
2*1.2
2*1.6
2*1.2
2*0.9
THD+N=10%
Output Power
PO
W
f=1kHz, RL=4Ω,
THD+N=1%
Total Harmonic Distortion +
Noise
THD+N
VN
PO=1W
RL=4Ω, f=1kHz
0.1
120
84
%
µV rms
dB
f=20Hz~20kHz, A weighted,
Av=28.5dB
f=20Hz~20kHz, A weighted,
Av=28.5dB, Po = 1W
Output Noise
Signal to Noise Ratio
SNR
Offset Voltage
Efficiency
VOS
±10
mV
%
η
Po = 2*1W
60
HT8320
Audio Amplifier Integrated with Charge Pump
◼ TYPICAL OPERATING CHARACTERISTICS
Class D Mode
HT8320
Audio Amplifier Integrated with Charge Pump
HT8320
Audio Amplifier Integrated with Charge Pump
Class AB Mode
HT8320
Audio Amplifier Integrated with Charge Pump
◼ APPLICATION INFORMATION
The HT8320 is a highly efficient 2*4.5W stereo Class-D audio power amplifier with anti-clipping function
(ACF) for applications of battery-powered portable devices. It integrates a filter-less Class-D audio amplifier
with an adaptive dual charge pump regulator. It operates from 2.7V to 5.5V supply. When operating with a
4.2V supply voltage, the HT8320 can deliver into two 4Ω load a maximum output power up to 2*4.5W with
10% THD+N.
In HT8320, the power supply rail of the Class-D amplifier output stage is internally boosted and regulated at
6.4V by an adaptive dual charge pump regulator, allowing for a much louder audio output than a
stand-alone one directly connected to the battery. It makes HT8320 an ideal audio solution for portable
devices, which are powered by a single-cell lithium battery while requiring higher audio loudness.
The HT8320 features ACF to constantly monitor and safeguard the audio outputs against the boosted
supply voltage, preventing output clipping distortion, excessive power dissipation, or hazardous speaker
over-load. Once an over-level condition is detected, the ACF lowers the voltage gain of the audio amplifier
proportionally to eliminate output clipping distortion while maintaining a maximum dynamic range of the
audio outputs allowed by the boosted supply voltage. It provides 4 different ACF modes and ACF OFF
mode to adjust different applications.
Class AB amplifier mode is also available for HT8320. Once the EMI Interference from class D and Boost
Converter becomes an annoying problem, HT8320 can be changed into Class AB mode.
As specifically designed for portable device applications, the HT8320 incorporates a shutdown mode to
minimize the power consumption by holding the CTRL pin to ground. It also includes comprehensive
protection features against various operating faults such as over-current, over-temperature, and
under-voltage for a safe and reliable operation.
1. Dual Charge Pump Regulator
To allow for a much louder audio output, an integrated adaptive dual charge pump regulator is employed to
boost PVDD, the power rail for the Class-D amplifier output stage. Whenever the audio outputs are higher
than a prescribed level, the charge pump regulator will be activated to boost and regulate CPOUT at 6.4V.
In this case, the charge pump regulator operates in the regulation mode. For a proper operation, the
boosted voltage CPOUT generated by the charge pump regulator must be externally shorted to PVDD pins
via a sufficiently wide metal trace on the system board.
On the other hand, when the audio outputs are less than a prescribed level for an extended period of time,
the charge pump regulator will be de-biased and forced into the standby mode. In the standby mode, the
amplifier output stage is powered directly by VBAT, the battery voltage, through an internal power switch.
This adaptive nature of the charge pump regulator can greatly improve the power efficiency of HT8320
when playing audio and thus extends battery life.
1.1. Selection of Charge Pump Flying Capacitor (CFLY
)
A nominal value of 4.7μF is recommended for the flying capacitors (between CxP and CxN) of the charge
pump regulator. A low equivalent-series-resistance (ESR) ceramic capacitor, such as X7R or X5R, is
recommended.
1.2. Selection of Charge Pump Output Capacitor (COUT
)
For best performance, a 10μF low ESR ceramic capacitor in parallel with a tantalum or electrolytic capacitor
(470μF or higher) is recommended for the output capacitor (COUT) of the charge pump regulator.
HT8320
Audio Amplifier Integrated with Charge Pump
2. Anti-Clipping Function (ACF) and Mode Configuration
Once the ACF function is enabled, HT8320 attenuates system gain to an appropriate value when an
excessive input is applied, so as not to cause the clipping at the differential signal output. In this way, the
output audio signal is controlled in order to obtain a maximum output level without distortion. And HT8320
also follows to the clips of the output waveform due to the decrease in the power-supply voltage.
ACF ON
(1) Excessive Inputs
Total
Gain
Av=Av0+Aa
Peak +
Peak -
Initial Gain
Input
Av0
Attack Time
Release Time
Excessive
Inputs
Clipping
Detection
ACF OFF
Peak +
Peak -
ACF
Attenuation
Gain
-10dB≤Aa≤0
ACF ON
(2) Appropriate inputs
+
+
Total
Gain
Av=Av0+Aa
Initial Gain
PVDD
Av0
Decrease
-
-
Power Supply
Decreasing
Clipping
Detection
Attack Time
Release Time
ACF
Attenuation
Gain
-10dB≤Aa≤0
Fig. 1 the ACF Function Operation Outline
The Attack time of ACF Function is a time interval until system gain falls to target attenuation gain -3dB
when a big enough signal input. And, the Release Time is a time from target attenuation gain to not working
of ACF. The maximum attenuation gain is 10dB. There are 4 different ACF modes with different attack time
and release time, and ACF off mode.
Table 1 Attack time and Release time
ACF Terminal
Directly pulled to GND
Pulled to GND with a 51k resistor
Floating
ACF mode
ACF1
Attack time
50ms
4ms
Release time
300ms
2s
ACF2
ACF3
50ms
50ms
-
600ms
75ms
-
Pulled to VBAT with a 51k resistor
Directly pulled to VBAT
ACF4
ACF OFF
Notice that the ACF mode is only available in Class-D mode. If the device goes into Class-AB mode, the
device will work in ACF off mode no matter how the ACF terminal is connecting.
3. Audio Amplifier Input Configuration
HT8320 is an amplifier with analog input (single-ended or differential). For a differential input between INxP
and INxN pins, signals input via DC-cut capacitors (CIN). The input signal gain is calculated by
Av（dB） 20*log(560k (20K+R ))
.
IN
And, the low pass cut-off frequency of input signal, can be calculated by
fc =1 (2πRINC )
IN
.
For a single-ended input at INxP pin, signal input via a DC-cut capacitor (CIN). INxN pin should be
HT8320
Audio Amplifier Integrated with Charge Pump
connected to ground via a DC-cut capacitor (with the same value of CIN). The Gain and low pass Cut-off
frequency are the same as the above case.
Front Circuit
ZOUT
Front Circuit
HT8320
IN+
HT8320
IN+
CIN RIN
CIN RIN
ZOUT
IN-
IN-
CIN RIN
ZOUT
RIN
CIN
Fig. 2 (1) Differential Input;
(2) Single-ended Input
4. Working Mode Selection (CTRL Terminal)
HT8320 can work in different modes by setting the CTRL terminal, shown as follow.
Table. 2 CTRL Terminal Mode Control
CTRL Voltage
MODE
SYMBOL
MIN.
1.8
1.1
0
TYP.
VBAT
1.3
MAX.
UNIT
V
Class D mode with adaptive charge pump
Class AB mode in ACF-Off without charge pump
SD (Shutdown) Mode
VMOD1
VMOD2
VMOD3
VBAT
1.5
V
0
0.4
V
Notice that there’s no internal pull-up or pull-down resistor.
5. Pop-Click Noise Reduction
The Pop-Click Noise Reduction Function of HT8320 works in the cases of Power-on, Power-off, Shutdown
on, and Shutdown off. To achieve a more excellent noise reduction performance, it is recommended to use
a DC-cut capacitor (CIN) of 0.1µF or less.
Besides, POP noise can be minimal according to the following procedure of shutdown control.
・During power-on, Shutdown mode is not cancelled until the power supply is stabilized enough.
・Before Power-off, set Shutdown mode first.
The pop-click noise: Power-on/-off > Shutdown on/off.
tDELAY>tSTUP
tDELAY>50ms
VUVLH
VBAT V
UVLL
ACF-Off
ACF-On
ClassAB
SD
VCTRL_ON
CTRL
OUT
tSTUP
SD
SD
Power off
Operation
Power off
Fig. 3 Pop-Click Noise Reduction by Shutdown
HT8320
Audio Amplifier Integrated with Charge Pump
6. Protection Function
HT8320 has the protection functions such as Over-Current Protection function, Thermal Protection function,
and Low Voltage Malfunction Prevention function.
(1) Over-current Protection function
When a short circuit occurs between one output terminal and Ground, PVDD, or the other output, the
over-current protection mode starts up. In the over current protection mode, the differential output terminal
becomes a high impedance state. Once the short circuit conditions are eliminated, the over current
protection mode can be cancelled automatically.
(2) Thermal Protection function
When excessive high temperature of HT8320 (160℃) is detected, the thermal protection mode starts up. In
the thermal protection mode, the differential output terminal becomes Weak Low state (a state grounded
through high impedance).
(3) Low voltage Malfunction Prevention function
This is the function to establish the low voltage protection mode when AVBAT terminal voltage becomes
lower than the detection voltage (VUVLL) for the low voltage malfunction prevention. And the protection mode
is canceled when AVBAT terminal voltage becomes higher than the threshold voltage (VUVLH). In the low
voltage protection mode, the differential output pin becomes Weak Low state (a state grounded through
high impedance). HT8320 will start up within the start-up time (TON) when the low voltage protection mode
is cancelled
HT8320
Audio Amplifier Integrated with Charge Pump
7. Typical Application Circuits
HT8320
Audio Amplifier Integrated with Charge Pump
8. Typical PCB Layout
HT8320
Audio Amplifier Integrated with Charge Pump
HT8320
Audio Amplifier Integrated with Charge Pump
HT8320
Audio Amplifier Integrated with Charge Pump
Note: Plseae note CPOUT and PVDD layout. CPOUT first filtered, then connect to PVDD. Filter Capacity is
putted close to CPOUT and PVDD pins.
注意：PCB LAYOUT 上，CPOUT 必须先经过电容滤波，再连接到 PVDD。滤波小电容靠近相应管脚摆放。
PVBAT 为电源输入管脚，请走较粗走线，滤波小电容靠近管脚。
HT8320
Audio Amplifier Integrated with Charge Pump
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