ZHCSNY0B
May 2020 – January 2023
BQ25798
PRODUCTION DATA
1
特性
2
应用
3
说明
4
Revision History
5
说明(续)
6
Device Comparison
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
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
Device Power-On-Reset
9.3.2
PROG Pin Configuration
9.3.3
Device Power Up from Battery without Input Source
9.3.4
Device Power Up from Input Source
9.3.4.1
Power Up REGN LDO
9.3.4.2
Poor Source Qualification
9.3.4.3
ILIM_HIZ Pin
9.3.4.4
Default VINDPM Setting
9.3.4.5
Input Source Type Detection
9.3.4.5.1
D+/D– Detection Sets Input Current Limit
9.3.4.5.2
HVDCP Detection Procedure
9.3.4.5.3
Connector Fault Detection
9.3.5
Dual-Input Power Mux
9.3.5.1
ACDRV Turn On Condition
9.3.5.2
VBUS Input Only
9.3.5.3
One ACFET-RBFET
9.3.5.4
Two ACFETs-RBFETs
9.3.6
Buck-Boost Converter Operation
9.3.6.1
Force Input Current Limit Detection
9.3.6.2
Input Current Optimizer (ICO)
9.3.6.3
Maximum Power Point Tracking for Small PV Panel
9.3.6.4
Pulse Frequency Modulation (PFM)
9.3.6.5
Device HIZ State
9.3.7
USB On-The-Go (OTG)
9.3.7.1
OTG Mode to Power External Devices
9.3.7.2
Backup Power Supply Mode
9.3.7.3
Backup Mode with Dual Input Mux
9.3.8
Power Path Management
9.3.8.1
Narrow VDC Architecture
9.3.8.2
Dynamic Power Management
9.3.9
Battery Charging Management
9.3.9.1
Autonomous Charging Cycle
9.3.9.2
Battery Charging Profile
9.3.9.3
Charging Termination
9.3.9.4
Charging Safety Timer
9.3.9.5
Thermistor Qualification
9.3.9.5.1
JEITA Guideline Compliance in Charge Mode
9.3.9.5.2
Cold/Hot Temperature Window in OTG Mode
9.3.10
Integrated 16-Bit ADC for Monitoring
9.3.11
Status Outputs ( STAT, and INT)
9.3.11.1
Charging Status Indicator (STAT Pin)
9.3.11.2
Interrupt to Host ( INT)
9.3.12
Ship FET Control
9.3.12.1
Shutdown Mode
9.3.12.2
Ship Mode
9.3.12.3
System Power Reset
9.3.13
Protections
9.3.13.1
Voltage and Current Monitoring
9.3.13.1.1
VAC Over-voltage Protection (VAC_OVP)
9.3.13.1.2
VBUS Over-voltage Protection (VBUS_OVP)
9.3.13.1.3
VBUS Under-voltage Protection (POORSRC)
9.3.13.1.4
System Over-voltage Protection (VSYS_OVP)
9.3.13.1.5
System Short Protection (VSYS_SHORT)
9.3.13.1.6
Battery Over-voltage Protection (VBAT_OVP)
9.3.13.1.7
Battery Over-current Protection (IBAT_OCP)
9.3.13.1.8
Input Over-current Protection (IBUS_OCP)
9.3.13.1.9
OTG Over-voltage Protection (OTG_OVP)
9.3.13.1.10
OTG Under-voltage Protection (OTG_UVP)
9.3.13.2
Thermal Regulation and Thermal Shutdown
9.3.14
Serial Interface
9.3.14.1
Data Validity
9.3.14.2
START and STOP Conditions
9.3.14.3
Byte Format
9.3.14.4
Acknowledge (ACK) and Not Acknowledge (NACK)
9.3.14.5
Target Address and Data Direction Bit
9.3.14.6
Single Write and Read
9.3.14.7
Multi-Write and Multi-Read
9.4
Device Functional Modes
9.4.1
Host Mode and Default Mode
9.4.2
Register Bit Reset
9.5
Register Map
9.5.1
I2C Registers
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
PV Panel Selection
10.2.2.2
Inductor Selection
10.2.2.3
Input (VBUS / PMID) Capacitor
10.2.2.4
Output (VSYS) Capacitor
10.2.3
Application Curves
11
Power Supply Recommendations
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
13
Device and Documentation Support
13.1
Device Support
13.1.1
第三方米6体育平台手机版_好二三四免责声明
13.2
Documentation Support
13.2.1
Related Documentation
13.3
接收文档更新通知
13.4
支持资源
13.5
Trademarks
13.6
静电放电警告
13.7
术语表
14
Mechanical, Packaging, and Orderable Information
1
特性
高功率密度、高集成降压
/升压
充电器,用于 1-4 节电池,
支持任何 USB PD 3.0 概要文件
集成
四个
开关 MOSFET、BATFET
集成输入和充电电流检测
高效
750kHz 或 1.5MHz 开关频率
5A
充电电流,精度 10mA
效率高达 96.5%:在 3A 电流下从 20V 输入为 16V 电池充电
支持宽输入源
自主采样开路电压(V
OC
)最大功率点跟踪(MPPT),用于从光伏面板充电
3.6V 至 24V 宽输入工作电压范围,绝对最大额定电压为 30V
检测 USB BC1.2、HVDCP 以及非标准适配器
的双输入电源多路复用器控制器(可选)
窄电压直流 (NVDC) 电源路径
支持超快速切换到可调节电压的备用模式
通过电池给 USB 端口加电 (USB OTG)
2.8V 至 22V
OTG输出电压,分辨率为 10mV,
支持 USB-PD PPS
OTG 输出电流调节高达
3.32A
,
分辨率为 40mA
灵活的自主和 I
2
C 模式,可实现出色系统性能
用于电压、电流和温度监控的集成 16 位 ADC
低电池静态电流
仅使用电池工作时为
17μA
充电器关断模式下为
500nA
高精度
2S-4S 电池充电电压调节范围为 -0.25% 至 +0.65%
充电电流调节范围为 ±5%
输入电流调节范围为 ±5%
安全
热调节和热关断
输入/电池 OVP 和 OCP
转换器 MOSFET OCP
充电安全计时器
封装
29 引脚,4mm × 4mm QFN
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