ZHCSKH8C
December 2009 – December 2019
BQ24072T
,
BQ24075T
,
BQ24079T
PRODUCTION DATA.
1
特性
2
应用
3
说明
简化电路
4
修订历史记录
5
说明 (续)
6
Device Options
7
Pin Configuration and Functions
Pin 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
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Undervoltage Lockout (UVLO)
9.3.2
Overvoltage Protection (OVP)
9.3.3
Dynamic Power-Path Management
9.3.4
Battery Charging
9.3.5
Charge Current Translator
9.3.6
Battery Detection and Recharge
9.3.7
Termination Disable (TD Input, BQ24072T)
9.3.8
Battery Disconnect (SYSOFF Input)
9.3.9
Dynamic Charge Timers (TMR Input)
9.3.10
Status Indicators (PGOOD, CHG)
9.3.11
Thermal Regulation and Thermal Shutdown
9.3.12
Battery Pack Temperature Monitoring
9.4
Device Functional Modes
9.4.1
Input Source Connected (Adapter or USB)
9.4.1.1
Input DPM Mode (VIN-DPM)
9.4.1.2
DPPM Mode
9.4.1.3
Battery Supplement Mode
9.4.2
Input Source Not Connected
10
Applications and Implementation
10.1
Application Information
10.2
Typical Applications
10.2.1
Using the BQ24075T, BQ24079T to Disconnect the Battery from the System
10.2.1.1
Design Requirements
10.2.1.2
Detailed Design Procedure
10.2.1.2.1
Program the Fast Charge Current (ISET):
10.2.1.2.2
Program the Input Current Limit (ILIM):
10.2.1.2.3
Program 6.25-hour Fast-Charge Safety Timer (TMR):
10.2.1.2.4
TS Function:
10.2.1.2.5
CHG and PGOOD LED Status:
10.2.1.2.6
Processor Monitoring Status:
10.2.1.2.7
System ON/OFF (SYSOFF):
10.2.1.2.8
Selecting IN, OUT and BAT Capacitors
10.2.1.3
Application Curves
10.2.2
BQ24072T in a Host Controlled Charger Application
10.2.2.1
Design Requirements
10.2.2.2
Detailed Design Procedures
10.2.2.2.1
Termination Disable:
10.2.2.3
Application Curves
11
Power Supply Recommendations
11.1
Power On
11.1.1
Half-Wave Adapters
12
Layout
12.1
Layout Guidelines
12.2
Layout Example
12.3
Thermal Package
13
器件和文档支持
13.1
器件支持
13.1.1
第三方产品免责声明
13.2
相关链接
13.3
接收文档更新通知
13.4
支持资源
13.5
商标
13.6
静电放电警告
13.7
Glossary
14
机械、封装和可订购信息
1
特性
完全符合 USB 充电器标准
最大输入电流可选 100mA 和 500mA
100mA 最大电流限制可确保充电符合 USB-IF 标准
基于输入的动态电源管理 (V
IN
-DPM),用于保护免受不良 USB 电源损害
28V 输入额定值,具有过压保护功能
集成动态电源路径管理 (DPPM) 功能可同时独立进行系统供电和对电池充电
系统输出跟踪电池电压 (BQ24072T)
借助电流监控输出 (ISET) 功能可支持高达 1.5A 的充电电流
针对墙上适配器的高达 1.5A 的可编程输入电流限制
通过 SYSOFF 输入实现的电池断开功能
反向电流、短路和热保护
基于电压的 NTC 热敏电阻灵活输入
专有启动序列可限制浪涌电流
具有充电中/充电完成和电源正常的状态指示
小型 3mm × 3mm 16 引线 VQFN 封装