X-Powers AXP209 Schematics
Enhanced single Cell Li-Battery and Power System Management IC
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AXP209
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
目录
1．概述(Summary)............................................................................................................................................ 3
2．特性(Feature)................................................................................................................................................ 4
3．典型应用(Typical Application).................................................................................................................5
4．极限参数(Absolute Maximum Ratings) ...............................................................................................6
5．电气特性(Electrical Characteristics)....................................................................................................... 6
6．典型特性(Typical Characteristics)........................................................................................................... 9
7．管脚定义(Pin Description)....................................................................................................................... 12
8．功能框图(Functional Block Diagram)..................................................................................................14
9．控制和操作(Control and Operating) .................................................................................................... 15
9.1 工作模式和复位(Power On/Off & Reset) ...................................................................................... 15
9.2 电源通路管理(IPS)............................................................................................................................... 17
9.3 自适应 PWM 充电器(Adaptive PWM Charger) ........................................................................... 19
9.4 备用电池(Backup Batttery) .............................................................................................................. 22
9.5 多路电源输出(Multi-Power Outputs)............................................................................................. 23
9.6 默认电压/启动时序的设置(Default Voltage/Timing Setting).................................................... 24
9.7 信号采集系统(Signal Capture)......................................................................................................... 25
9.8 多功能管脚说明(Multi-Function Pin Description) ...................................................................... 25
9.9 定时器(Timer)...................................................................................................................................... 25
9.10 解密(Decryption) ............................................................................................................................. 26
9.11 HOST 接口及中断(TWSI and IRQ)................................................................................................. 26
9.12 寄存器(Registers).............................................................................................................................. 28
10．封装(Package) .......................................................................................................................................... 45
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
1．概述(Summary)
AXP209 是高度集成的电源系统管理芯片，针对单芯锂电池(锂离子或锂聚合物)且需要多路电源转换
输出的应用，提供简单易用而又可以灵活配置的完整电源解决方案，充分满足目前日益复杂的应用处理
器系统对于电源精确控制的要求。
AXP209 集成了一个自适应的 USB-Compatible 的 PWM 充电器，2 路降压转换器(Buck DC-DC
converter)，5 路线性稳压器(LDO)，电压/电流/温度等多路 12-Bit ADC，以及 4 路可配置的 GPIO。为保
证电源系统安全稳定，AXP209 还整合了过/欠压(OVP/UVP)、过温(OTP)、过流(OCP)等保护电路。
AXP209 的智慧电能平衡(Intelligent Power Select, IPS™)电路可以在 USB 以及外部交流适配器、锂电
池和应用系统负载之间安全透明的分配电能，并且在只有外部输入电源而没有电池(或者电池过放/损坏)
的情况下也可以使应用系统正常工作。
AXP209 具有外部适配器和 USB 以及电池等三输入能力，支持可充电备用电池。
AXP209 提供了一个两线串行通讯接口:Two Wire Serial Interface (TWSI)，应用处理器可以通过这个接
口去打开或关闭某些电源输出，设置它们的电压，访问内部寄存器和多种测量数据(包括 Fuel Gauge)。高
精度（1%，主要由 BIAS 电阻的 1%精度决定）的电量测量数据方便消费者更清楚的实时掌握电能使用状
况，给消费者带来前所未有的设备电能使用体验。
AXP209 提供 6mm x 6mm 48-pin QFN 封装。
应用产品
z 手持式移动设备
智能移动电话, PMP/MP4, 数
码相机, 数字摄像机, 手持导
航设备 GPS, PDA, 手持数字
广播电视接收机
z 移动互联网设备 xPad,MID
z 数码相框，便携 DVD 播放器，
超便携移动电脑 UMPC and
UMPC-like，学习机
z 应用处理器电路系统
Application Processor systems
z 其它电池和多电源应用系统
管脚定义
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2．特性(Feature)
• 电源管理 (IPS)
o 宽输入电压范围：
2.9V~6.3V (AMR：-0.3V~11V)
o 可配置的高效智慧电能平衡“IPS™”系统
o 自适应 USB(支持 USB3.0)或交流适配器
限压限流 (4.4V/900mA/500mA/100mA)
o 电池通路的等效内阻小于 75mΩ
• 全集成 PWM 充电器 (PWM Charger)
o 最大充电电流可达 1.8A
o 支持电池温度监测
o 全面支持 USB 充电（含 3.0），符合规范
要求
o 充电精度高，误差小于 0.5%
o 支持 4.1V/4.15V/4.2V/4.36V 等多种电池
o 自动进行充电流程控制
o 可直接驱动 LED 指示充电状态
o 根据系统负载情况自动调节充电电流
• 备用电池 (Backup Battery)
o 可接受备用电池输入供给 RTC 模块
o 支持备用电池充电，可设置充电电流
• 2 路同步降压转换器 (DC-DC)
o
DC-DC2：可在 0.7-2.275V 之间调节,
25mV/step, 驱动能力 1.6A, 支持 VRC
o DC-DC3：可在 0.7-3.5V 之间调节,
25mV/step, 驱动能力 1.2A
• 5 路线性稳压器 (LDO)
o LDO1：30mA，始终有效
o LDO2：低噪声 LDO，1.8V~3.3V 可调节，
100mV/step, 驱动能力 200mA
o LDO3：0.7-3.5V 可调节, 25mV/step, 驱
动能力 200mA
o LDO4：低噪声 LDO，1.8V~3.3V 可调节，
100mV/step, 驱动能力 200mA
o LDO5：低噪声 LDO, 1.8-3.3V 可调节,
100mV/step, 驱动能力 50mA
• 定时器 (Timer)
o 7bit Timer，定时范围 1~127 分钟
o Timer 中断输出
注：VRC，Voltage Ramp Control，电压斜
率控制。
AXP209
Enhanced single Cell Li-Battery and Power System Management IC
• 信号采集系统 (Signal Capture)
o 内建 12 路 12 Bit ADC
o 接受 2 路外部信号输入
o 提供电池和外部输入电源的电流电压数
据
o 内建高精度库仑计及 Fuelgauge 系统
o 提供丰富的电源管理信息，如瞬时耗电
(mA or mW)，剩余电池电量(% or mAh)，
充电状态(%) 和剩余电池使用时间或充
电时间等
o 两级低电警告及保护
o 提供芯片温度数据
• 应用处理器接口 (Host Interface)
o Host 可以通过 TWSI 接口进行数据交换
o 可以灵活配置的中断及休眠管理
o 灵活的管脚功能设置，多路 GPIO 可分别
设置为 IO、ADC 等功能
o 内置可配置计时器
o 提供 12 组寄存器，可用于系统关机时的
数据保存
• 系统管理(System Management)
o 支持软复位和硬复位
o 支持软关机和硬关机
o 支持外部触发源唤醒
o 支持输出电压监测、自诊断功能
o 输出 PWROK，用于系统复位或关机指示
o 外部电源检测(插入/移除/驱动能力不足)
o 所有输入输出都支持软启动
o 过/欠压保护 (OVP/UVP)
o 过流保护 (OCP)
o 过温保护 (OTP)
o 支持 OTG VBUS 电源状态设置/监测
• 高整合度(Fully Integration)
o 内部产生高精度参考电压（0.5%）
o 内置 MOSFET
o 可定制时序和输出电压
• 解密模块 (Decryption)
o 128bit OTP 密码存储
o 动态实时解密算法
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Enhanced single Cell Li-Battery and Power System Management IC
3．典型应用(Typical Application)
AXP209
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
4．极限参数(Absolute Maximum Ratings)
Symbol Description Value Units
ACIN Input Voltage 输入电压 -0.3 to 11 V
VBUS Input Voltage 输入电压 -0.3 to 11 V
TJ Operating Temperature Range 工作温度 -40 to 130 ℃
Ts Storage Temperature Range 储运温度 -40 to 150 ℃
T
Maximum Soldering Temperature (at leads，10sec)
LEAD
锡焊温度
V
Maximum ESD stress voltage，Human Body Model
ESD
抗静电能力
PD Internal Power Dissipation
内部功率消耗耐受
300 ℃
>4000 V
2100 mW
5．电气特性(Electrical Characteristics)
VIN =5V， BAT=3.8V， TA= 25℃
SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS
ACIN
VIN ACIN Input Voltage 3.8 6.3 V
I
V
OUT
V
ACIN Under Voltage Lockout 3.8 V
UVLO
V
IPS Output Voltage 2.9 5.0 V
OUT
R
Internal Ideal Diode On
ACIN
VBUS
VIN VBUS Input Voltage 3.8 6.3 V
I
V
OUT
V
VBUS Under Voltage Lockout 3.8 V
UVLO
V
IPS Output Voltage 2.9 5.0 V
OUT
R
Internal Ideal Diode On
VBUS
Battery Charger
V
BAT Charge Target Voltage -0.5% 4.2 +0.5% V
TRGT
I
Charge Current 1200 1800 mA
CHRG
I
Trickle Charge Current 10% I
TRKL
Current Available Before
OUT
Loading BAT
Resistance
Current Available Before
OUT
Loading BAT
Resistance
500mV Voltage Drop 2500 mA
PIN to PIN, ACIN to
170 mΩ
IPSOUT
500 900 mA
PIN to PIN, VBUS to
300 mΩ
IPSOUT
CHRG
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
V
Trickle Charge Threshold
TRKL
Voltage
ΔV
Recharge Battery Threshold
RECHG
Voltage
T
Charger Safety Timer
TIMER1
Termi n ation Time
T
Charger Safety Timer
TIMER2
Termi n ation Time
I
End of Charge Indication
END
Current Ratio
Backup Battery
V
Backup Battery Charge Target
TRGT
Voltage
I
Backup Battery Charge Current 50 200 400 uA
CHRG
I
Current when use Backup
Backup
Battery
NTC
Threshold Voltage
Voltage
VTE NTC Disable Threshold Voltage Falling Threshold
Ideal Diode
R
On Resistance(BAT to IPSOUT) 75 mΩ
ds(on)
3.0 V
Threshold Voltage
Relative to V
TAR G ET
-100 mV
Trickle Mode 40 Min
CC Mode 480 Min
CV Mode 10% 15% I
2.5 3.0 3.1 V
10 15 uA
Charge 2.112 VTL Cold Temperature Fault
Discharge
Charge 0.397 VTH Hot Temperature Fault Threshold
Discharge
0
3.264
3.226
0
3.264
0.282
0.2 V
Hysteresis
mA
CHRG
mA
V
V
SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS
Off Mode Current
I
OFF Mode Current BAT=3.8V 27 μA
BATOFF
I
SUSPEND
USB VBUS suspend Mode
current
BAT=3.8V，
VBUS=5V，
86 μA
N_VBUSEN=1
Logic
VIL Logic Low Input Voltage 0.3 V
VIH Logic High Input Voltage 2 V
TWSI
VCC Input Supply Voltage 3.3 V
ADDRESS TWSI Address 0x68
f
Clock Operating Frequency 400 1200 kHZ
SCK
tf Clock Data Fall Time 2.2Kohm Pull High 60 ns
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
tr Clock Data Rise Time 2.2Kohm Pull High 100 ns
DCDC
f
Oscillator Frequency Default 1.5 MHz
OSC
DCDC2
I
PMOS Switch Current Limit PWM Mode 2300 mA
LIM2
I
V
DCDC3
I
I
V
SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS
LDO1
V
Available Output Current PWM Mode 1800 mA
DC2OUT
Output Voltage Range
DC2OUT
PMOS Switch Current Limit PWM Mode 1400 mA
LIM3
Available Output Current PWM Mode 1000 mA
DC3OUT
Output Voltage Range
DC3OUT
Output Voltage I
LDO1
LDO1
=1mA
0.7 2.275
0.7 3.5
1.3
-1%
3.3
1%
V
V
V
I
Output Current 30 mA
LDO1
LDO2
V
Output Voltage I
LDO2
I
Output Current 200 mA
LDO2
PSRR Power Supply Rejection Ratio I
=1mA 1.8 3.3 V
LDO2
=60mA，1KHz TBD dB
LDO2
eN Output Noise,20-80KHz Vo=3V , Io=150mA 28 μV
LDO3
V
Output Voltage I
LDO3
I
Output Current 200 mA
LDO3
PSRR Power Supply Rejection Ratio I
=1mA 0.7 3.5 V
LDO3
=10mA， 1KHz TBD dB
LDO3
eN Output Noise,20-80KHz Vo=1.8V , Io=150mA TBD μV
LDO4
V
Output Voltage I
LDO3
I
Output Current 200 mA
LDO3
PSRR Power Supply Rejection Ratio I
=1mA 1.8 3.3 V
LDO3
=10mA， 1KHz TBD dB
LDO3
eN Output Noise,20-80KHz Vo=1.8V , Io=150mA 18 μV
LDO5
V
Output Voltage I
LDO5
I
Output Current 50 mA
LDO5
PSRR Power Supply Rejection Ratio I
=1mA 1.5 3.3 V
LDO5
=10mA，1KHz TBD dB
LDO5
eN Output Noise,20-80KHz Vo=1.8V, Io=30mA 18 μV
RMS
RMS
RMS
RMS
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Enhanced single Cell Li-Battery and Power System Management IC
6．典型特性(Typical Characteristics)
DC-DC Efficiency vs. Load(3.8Vin)
AXP209
DC-DC Load Transient(Typical)
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
DC-DC Ripple
V
vs Temperature
REF
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
V
vs Temperature
TRGT
Off Mode Current vs V
BAT
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AXP209
Enhanced single Cell Li-Battery and Power System Management IC
7．管脚定义(Pin Description)
Num Name Type Condition Function Description
1 SDA IO Data pin for serial interface,normally it connect a 2.2K
resistor to 3.3V I/O power
2 SCK I it is the Clock pin for serial interface,normally it connect
a 2.2K resistor to 3.3V I/O power
3 GPIO3 IO
4 N_OE I Power output on/off switch
5 GPIO2 IO REG92H[2:0] GPIO 2
6 N_VBUSEN I VBUS to IPSOUT Selection
7 VIN2 PI DCDC2 input source
8 LX2 IO Inductor Pin for DCDC2
9 PGND2 G NMOS Ground for DCDC2
10 DCDC2 I DC-DC2 feedback pin
11 LDO4 O Output Pin of LDO4
REG9EH[7]
GPIO 3
GND:on； IPSOUT:off
GND:IPSOUT select VBUS
High:IPSOUT do not select VBUS
12 LDO2 O Output Pin of LDO2
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Enhanced single Cell Li-Battery and Power System Management IC
13 LDO24IN PI Input to LDO2 and LDO4
14 VIN3 PI DCDC3 input source
15 LX3 IO Inductor Pin for DCDC3
16 PGND3 G NMOS GND for DCDC3
17 DCDC3 I Feed back to DCDC3
REG93H[2:0]
19 GPIO0 IO
REG90H[2:0]
20 EXTEN O
21 APS PI Internal Power Input
22 AGND G Analog Ground
23 BIAS IO External 200Kohm 1% resistor
24 VREF O Internal reference voltage
GPIO 1 18 GPIO1 IO
ADC Input
GPIO 0
Low noise LDO/Switch
ADC Input
External Power Enable
AXP209
25 PWROK O Power Good Indication OutPut
26 VINT PO Internal logic power, 2.5V
27 LDO1SET I It set the LDO1 default voltage.
28 LDO1 O LDO1 output，for Host RTC block
29 DC3SET I It set the DCDC3 default voltage
30 BACKUP IO Backup battery pin
31 VBUS PI USB VBUS input
32，33 ACIN PI Adapter input
34，35 IPSOUT IO Main Battery
36 CHGLED O charger status indication
37 TS I Battery Temperature sensor input or an external ADC
input
38，39 BAT PO System power source
40 LDO3IN O LDO3 input source
41 LDO3 I
42 BATSENSE I Current sense port1
43 CHSENSE O Current sense port2
44 VIN1 PI DCDC1 input source
45 LX1 IO Inductor Pin for DCDC1
46 PGND1 G NMOS Ground for DCDC1
47 PWRON I Power On-Off key input，Internal 100k pull high to APS
48 IRQ/
WAKEUP
49 EP G Exposed Pad, need to connect to system ground
IO
Output Pin of LDO3
IRQ output or wakeup
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Enhanced single Cell Li-Battery and Power System Management IC
8．功能框图(Functional Block Diagram)
AXP209
VBUS
BAT
ACIN
N_VBUSEN
BACKUP
LX1
VIN1
PGND1
CHGLED
BATSENSE
CHSENSE
PWRON
N_OE
IRQ
SCK
SDA
TS
BIAS
VREF
VINT
PWM
Charger
Serial Interface
Bat
Temperature
Monitor
Reference
Voltage
IPS
Control Logic
Register
12 bit ADC
Current Monitor
Voltage Monitor
Temperature Monitor
LDO1
LDO2
LDO4
LDO3
DC-DC2
DC-DC3
Output voltage
monitor/LBO
IPSOUT
APS
LDO1
LDO1SET
LDO24IN
LDO2
LDO4
LDO3
LDO3IN
DCDC2
LX2
VIN2
PGND2
DCDC3
LX3
VIN3
PGND3
DC3SET
GPIO3
GPIO2
GPIO1
GPIO0/LDOio0
EXTEN
PWROK
AGND
EP
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