X-Powers AXP171 Schematics

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AXP17

1

V1.2 Dec.26 2011

Enhanced Single Cell Li-Battery and Power System Management IC

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批注 [j1]: 新增

批注 [j2]: 芯智汇改成了 X-POWERS

1

AXP17

Enhanced single Cell Li-Battery and Power System Management IC

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)........................................................................................................................13

8．功能框图(Functional Block Diagram) ...................................................................................................14

9．控制和操作(Control and Operating) .....................................................................................................15

9.1 两种工作模式(Mode Description) .................................................................................................. 15

9.2 开关机和复位(Power On/Off & Reset) .......................................................................................... 15

9.3 电源通路管理(IPS) ............................................................................................................................... 16

9.4 自适应充电器(Adaptive Charger) ................................................................................................... 18

9.5 不同工作模式管脚功能区别(Mode Difference) ............................................................................. 21

9.6 多路电源输出(Multi-Power Outputs) ............................................................................................ 22

9.7 默认电压/启动时序的设置(Default Voltage/Timing Setting) .................................................... 23

9.8 信号采集系统(Signal Capture) ......................................................................................................... 23

9.9 定时器(Timer) ...................................................................................................................................... 24

9.10 Host 接口及中断(TWSI and IRQ) ................................................................................................... 24

9.11 寄存器(Registers) ............................................................................................................................. 26

10. 封装(Package) ............................................................................................................................................40

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

1．概述(Summary)

AXP171 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相对复杂而精确控制的要求。

AXP171 内部集成了一个自适应 USB-Compatible 的充电器，2 路降压转换器(Buck DC-DC converter)， 4 路线性稳压器(LDO)，电压/电流/温度监视等多路 12-Bit ADC。为保证电源系统安全稳定，AXP171 还整合了过/欠压(OVP/UVP)、过温(OTP)、过流(OCP)等保护电路。

AXP171 具有外部适配器和 USB 以及电池等三输入能力，其智慧电能平衡(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。

AXP171 提供了一个与主机通讯的两线串行通讯接口: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（0.5%）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。当应用系统不需要调整 AXP171 的默认输出时，它也可独立工作而无需应用处理器的干预。

AXP171 提供 5mm x 5mm 32-pin QFN 封装。

应用产品

 手持式移动设备

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, 智能移动电话, PMP/MP4

 数码相框，便携 DVD 播放器，

学习机

 应用处理器电路系统

Application Processor systems

 其它电池和多电源应用系统

管脚定义

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2．特性(Feature)

AXP17

Enhanced single Cell Li-Battery and Power System Management IC

 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 或交流适配器限压限流

(4.4V/500mA/100mA)

o 内部理想二极管的等效内阻小于 100mΩ

 全集成充电器 (Charger)

o 最大充电电流可达 1.3A o 支持电池温度监测 o 全面支持 USB 充电，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

 2 路同步降压转换器 (DC-DC)

o DC-DC1：可在 0.7V~3.5V 之间调节,

25mV/step, 驱动能力 800mA

o DC-DC2：可在 0.7-2.275V 之间调节,

25mV/step, 驱动能力 800mA, 支持 VRC

 4 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：低噪声 LDO, 1.8-3.3V 可调节,

100mV/step, 驱动能力 200mA

o LDO4：可在 0.7-3.5V 之间调节,

25mV/step, 驱动能力 500mA

注：VRC，Voltage Ramp Control，电压斜

率控制。

 信号采集系统 (Signal Capture)

o 内建多路 12 Bit ADC o 提供电池和外部输入电源的电流电压数

据

o 低电警告及保护 o 提供芯片温度信息

 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管理 o 内置计时器 o 提供四组寄存器，可用于系统关机时的

数据保存

o 支持无需接口控制的独立工作模式

 系统管理(System Management)

o 可以软复位或硬复位 o 支持软关机或硬关机，支持外部唤醒开

机

o 支持输出电压监测、自诊断功能 o PWROK 用于系统复位 o 外部电源检测(插入/移除/驱动能力不足) o 所有输出电压都支持软启动 o 过/欠压保护 (OVP/UVP) o 过流保护 (OCP) o 过温保护 (OTP)

 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

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Enhanced single Cell Li-Battery and Power System Management IC

3．典型应用(Typical Application)

AXP17

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V

AXP17

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

300 ℃

锡焊温度

V

Maximum ESD stress voltage，Human Body Model

ESD

>4000 V

抗静电能力

PD Internal Power Dissipation

2100 mW

内部功率消耗耐受

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

Current Available Before

OUT

1500

mA

Loading BAT

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

Resistance

PIN to PIN, ACIN to

IPSOUT

200 mΩ

VBUS

VIN VBUS Input Voltage 3.8 6.3 V

I

V

OUT

Current Available Before

OUT

500 900 mA

Loading BAT

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

Resistance

PIN to PIN, VBUS to

IPSOUT

300 mΩ

Battery Charger

V

BAT Charge Target Voltage -0.5% 4.2 +0.5%

TRGT

I

Charge Current Internal 450 1000 mA

CHRG

I

Trickle Charge Current 10%

TRKL

I

CHRG

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

mA

V

Trickle Charge Threshold

TRKL

Voltage

ΔV

Recharge Battery Threshold

RECHG

Voltage

T

Charger Safety Timer

TIMER1

Termination Time

T

Charger Safety Timer

TIMER2

Termination Time

I

End of Charge Indication

END

Current Ratio

NTC

VTL Cold Temperature Fault

Threshold Voltage

VTH Hot Temperature Fault Threshold

Voltage

VTE NTC Disable Threshold Voltage Falling Threshold

Ideal Diode

R

Internal Ideal Diode On

ds(on)

Resistance(BAT to IPSOUT)

SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS

Off Mode Current

I

OFF Mode Current BAT=3.8V 27 μA

BATOFF

I

USB VBUS suspend Mode

SUSPEND

current

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

tr Clock Data Rise Time 2.2Kohm Pull High 100 ns

DCDC

f

Oscillator Frequency Default 1.5 MHz

OSC

DCDC1

I

Input Current PFM Mode 26 μA

VIN1

3.0 V

Threshold Voltage

Relative to V

TARGET

-100 mV

Trickle Mode 40 Min

CC Mode 480 Min

CV Mode 10% 15% I

CHRG

mA

Charge

Discharge 3.226

Charge

Discharge 0.282

2.112

0

0.397

0

3.264

0.2 V

Hysteresis

100 mΩ

BAT=3.8V，

86 μA

VBUS=5V，

N_VBUSEN=1

V

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

I

=0

DC1OUT

I

PMOS Switch Current Limit PWM Mode 1000

LIM1

I

Available Output Current PWM Mode 800 mA

DC1OUT

V

Output Voltage Default 0.7 3.3 3.5 V

DC1OUT

DCDC2

I

Input Current PFM Mode

VIN2

I

=0

DC2OUT

I

PMOS Switch Current Limit PWM Mode 1000

LIM2

I

Available Output Current PWM Mode 800 mA

DC2OUT

V

Output Voltage Range

DC2OUT

20 μA

0.7 1.25 2.275

SYMBOL DESCRIPTION CONDITIONS MIN TYP MAX UNITS

LDO1

V

Output Voltage I

LDO1

=1mA

-1%

1.25

1.8

2.5

3.3

I

Output Current 30 mA

LDO1

LDO2

V

Output Voltage I

LDO2

I

Output Current 200 mA

LDO2

=1mA -1% 3 1% V

LDO2

IQ Quiescent Current 100 μA

PSRR Power Supply Rejection Ratio I

=60mA，1KHz 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

=1mA -1% 3.3 1% V

LDO3

IQ Quiescent Current 100 μA

PSRR Power Supply Rejection Ratio I

eN Output Noise,20-80KHz Vo=1.8V , Io=150mA

=10mA， 1KHz

LDO3

TBD dB

18 μV

LDO4

V

Output Voltage I

LDO4

I

Output Current 500 mA

LDO4

=1mA -1% 2.5 1% V

LDO4

IQ Quiescent Current 20 μA

PSRR Power Supply Rejection Ratio I

=10mA，1KHz TBD dB

LDO4

mA

1%

RMS

V

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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)

AXP17

DC-DC Load Transient

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

DC-DC Ripple

V

vs Temperature

REF

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

V

vs Temperature

TRGT

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AXP17

Enhanced single Cell Li-Battery and Power System Management IC

Off Mode Current vs V

BAT

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Enhanced single Cell Li-Battery and Power System Management IC

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7．管脚定义(Pin Description)

AXP17

Num Name Type

1 IRQ/

N_CHGEN

2 SDA/

N_HOLDEN

3 SCK I TWSI Clock Signal,pull high to 3.3V IO Power through an

4 PWROK O Power good indication

5 VIN2 PI DCDC2 input source

6 LX2 IO Inductor Pin for DCDC2

7 PGND2 G NMOS Ground for DCDC2

8 DCDC2 I DC-DC2 feedback pin

9 LDO3 O Output Pin of LDO3

10 LDO2 O Output Pin of LDO2

11 LDOIN PI Input to LDO2 and LDO3

12 LDO4 I Output Pin of LDO4

13 APS PI Internal Power Input 14 PWRON I Power On-Off key input，Internal 100k pull high to APS

15 BIAS IO External 200Kohm 1% resistor

16 VREF O Internal reference voltage,1.25V

17 VINT PO Internal logic power, 2.5V

18 PWREN I Power Rail Enable Signal 19 LDO1 O LDO1 output，for Host RTC block

20 VBUS PI USB VBUS input

21 ACIN PI Adapter input

22,23 BAT IO Main Battery

24 CHGLED O charger status indication

25 TS I Battery Temperature sensor input or an external ADC input

26,27 IPSOUT PO System power source

28 EXTEN O External power module enable

29 VIN1 PI DCDC1 input source

30 LX1 IO Inductor Pin for DCDC1

31 PGND1 G NMOS Ground for DCDC1

32 DCDC1 I DCDC1 feedback pin

33 GND G Thermal Ground

O SIEN=1 IRQ output

I SIEN=0 It is charger enable pin

IO SIEN=1 TWSI Data Signal,pull high to 3.3V IO Power through an

I SIEN=0 N_HOLDEN: GND-Hold enable; High-not hold

Condition Function Description

GND -charger enable; High-charger disable

2.2K Resistor

批注 [j3]: 新增

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