ZHCSN83A
june 2020 – january 2021
BQ25731
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics(BQ25731)
8.6
Timing Requirements
8.7
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Power-Up Sequence
9.3.2
Two-Level Battery Discharge Current Limit
9.3.3
Fast Role Swap Feature
9.3.4
CHRG_OK Indicator
9.3.5
Input and Charge Current Sensing
9.3.6
Input Voltage and Current Limit Setup
9.3.7
Battery Cell Configuration
9.3.8
Device HIZ State
9.3.9
USB On-The-Go (OTG)
9.3.10
Converter Operation
9.3.11
Inductance Detection Through IADPT Pin
9.3.12
Converter Compensation
9.3.13
Continuous Conduction Mode (CCM)
9.3.14
Pulse Frequency Modulation (PFM)
9.3.15
Switching Frequency and Dithering Feature
9.3.16
Current and Power Monitor
9.3.16.1
High-Accuracy Current Sense Amplifier (IADPT and IBAT)
9.3.16.2
High-Accuracy Power Sense Amplifier (PSYS)
9.3.17
Input Source Dynamic Power Management
9.3.18
Input Current Optimizer (ICO)
9.3.19
Two-Level Adapter Current Limit (Peak Power Mode)
9.3.20
Processor Hot Indication
9.3.20.1
PROCHOT During Low Power Mode
9.3.20.2
PROCHOT Status
9.3.21
Device Protection
9.3.21.1
Watchdog Timer
9.3.21.2
Input Overvoltage Protection (ACOV)
9.3.21.3
Input Overcurrent Protection (ACOC)
9.3.21.4
System Overvoltage Protection (SYSOVP)
9.3.21.5
Battery Overvoltage Protection (BATOVP)
9.3.21.6
Battery Discharge Overcurrent Protection (BATOC)
9.3.21.7
Battery Short Protection (BATSP)
9.3.21.8
System Undervoltage Lockout (VSYS_UVP)
9.3.21.9
Thermal Shutdown (TSHUT)
9.4
Device Functional Modes
9.4.1
Forward Mode
9.4.2
USB On-The-Go
9.4.3
Pass Through Mode (PTM)-Patented Technology
9.5
Programming
9.5.1
I2C Serial Interface
9.5.1.1
Timing Diagrams
9.5.1.2
Data Validity
9.5.1.3
START and STOP Conditions
9.5.1.4
Byte Format
9.5.1.5
Acknowledge (ACK) and Not Acknowledge (NACK)
9.5.1.6
Target Address and Data Direction Bit
9.5.1.7
Single Read and Write
9.5.1.8
Multi-Read and Multi-Write
9.5.1.9
Write 2-Byte I2C Commands
9.6
Register Map
9.6.1
ChargeOption0 Register (I2C address = 01/00h) [reset = E70Eh]
9.6.2
ChargeCurrent Register (I2C address = 03/02h) [reset = 0080h]
9.6.2.1
Battery Low Voltage Current Clamp
9.6.3
ChargeVoltage Register (I2C address = 05/04h) [reset value based on CELL_BATPRESZ pin setting]
9.6.4
ChargerStatus Register (I2C address = 21/20h) [reset = 0000h]
9.6.5
ProchotStatus Register (I2C address = 23/22h) [reset = B800h]
9.6.6
IIN_DPM Register (I2C address = 25/24h) [reset = 4100h]
9.6.7
ADCVBUS/PSYS Register (I2C address = 27/26h)
9.6.8
ADCIBAT Register (I2C address = 29/28h)
9.6.9
ADCIIN/CMPIN Register (I2C address = 2B/2Ah)
9.6.10
ADCVSYS/VBAT Register (I2C address = 2D/2Ch)
9.6.11
ChargeOption1 Register (I2C address = 31/30h) [reset = 3F00h]
9.6.12
ChargeOption2 Register (I2C address = 33/32h) [reset = 00B7]
9.6.13
ChargeOption3 Register (I2C address = 35/34h) [reset = 0434h]
9.6.14
ProchotOption0 Register (I2C address = 37/36h) [reset = 4A81h(2S~5s) 4A09(1S)]
9.6.15
ProchotOption1 Register (I2C address = 39/38h) [reset = 41A0h]
9.6.16
ADCOption Register (I2C address = 3B/3Ah) [reset = 2000h]
9.6.17
ChargeOption4 Register (I2C address = 3D/3Ch) [reset = 0048h]
9.6.18
Vmin Active Protection Register (I2C address = 3F/3Eh) [reset = 006Ch(2s~5s)/0004h(1S)]
9.6.19
OTGVoltage Register (I2C address = 07/06h) [reset = 09C4h]
9.6.20
OTGCurrent Register (I2C address = 09/08h) [reset = 3C00h]
9.6.21
InputVoltage(VINDPM) Register (I2C address = 0B/0Ah) [reset =VBUS-1.28V]
9.6.22
IIN_HOST Register (I2C address = 0F/0Eh) [reset = 2000h]
9.6.23
ID Registers
9.6.23.1
ManufactureID Register (I2C address = 2Eh) [reset = 40h]
9.6.23.2
Device ID (DeviceAddress) Register (I2C address = 2Fh) [reset = D6h]
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Input Snubber and Filter for Voltage Spike Damping
10.2.2.2
ACP-ACN Input Filter
10.2.2.3
Inductor Selection
10.2.2.4
Input Capacitor
10.2.2.5
Output Capacitor
10.2.2.6
Power MOSFETs Selection
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
12.2.1
Layout Example Reference Top View
12.2.2
Inner Layer Layout and Routing Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
第三方产品免责声明
13.2
Documentation Support
13.2.1
Related Documentation
13.3
支持资源
13.4
Trademarks
13.5
静电放电警告
13.6
术语表
14
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
RSN|32
MPQF194B
散热焊盘机械数据 (封装 | 引脚)
RSN|32
QFND189E
订购信息
zhcsn83a_oa
1
特性
由于没有电池 MOSFET,因此可节省成本并提高效率
400kHz/800kHz 可编程开关频率,可实现高效率/高功率密度
适用于 USB-C 电力输送 (PD) 接口平台的降压/升压充电器
输入范围为 3.5V 至
26V
,可为 1 至
5 节
电池充电
充电电流高达 16.2A/8.1A,分辨率为 128mA/64mA,基于 5mΩ/10mΩ 检测电阻
输入电流限制高达 10A/6.35A,分辨率为 100mA/50mA,基于 5mΩ/10mΩ 检测电阻
支持 USB 2.0、USB 3.0、USB 3.1 和 USB 电力传输 (PD)
输入电流优化器 (ICO),无需过载适配器即可获取最大输入功率
可在降压、降压/升压和升压操作之间进无缝转换
提供输入电流和电压调节(IINDPM 和 VINDPM)以防电源过载
TI 获得专利的开关频率抖动模式,可降低 EMI 噪声
TI 获得专利的直通模式 (PTM),可提高系统功效并实现 99% 的电池快速充电。
通过专用引脚监测输入和电池电流
集成型 8 位 ADC,可监控电压、电流和功率
支持具有专用引脚的独立比较器逻辑
通过电池给 USB 端口加电 (USB OTG)
具有 8mV 分辨率的 3V 至 24V OTG
输出电流限制高达 12.7A/6.35A,分辨率为 100mA/50mA,基于 5mΩ/10mΩ 检测电阻
可通过
I
2
C
主机控制接口实现灵活系统配置
高精度调节和监控
±0.5% 充电电压调节
±3% 充电电流调节
±2.5% 输入电流调节
±2% 输入/充电电流监测
安全
热关断
输入、系统和电池过压保护
输入、MOSFET 和电感器过流保护
封装:32 引脚,4.0mm × 4.0mm WQFN