ZHCSKL0D December 2009 – December 2019 BQ24610 , BQ24617
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 說明 （續）
- 6 Device Comparison Table
- 7 Pin Configuration and Functions
- 8 Specifications
-
9 Detailed Description
- 9.1 Overview
- 9.2 Functional Block Diagram
- 9.3
Feature Description
- 9.3.1 Battery Voltage Regulation
- 9.3.2 Battery Current Regulation
- 9.3.3 Input Adapter Current Regulation
- 9.3.4 Precharge
- 9.3.5 Charge Termination, Recharge, and Safety Timer
- 9.3.6 Power Up
- 9.3.7 Enable and Disable Charging
- 9.3.8 System Power Selector
- 9.3.9 Automatic Internal Soft-Start Charger Current
- 9.3.10 Converter Operation
- 9.3.11 Synchronous and Nonsynchronous Operation
- 9.3.12 Cycle-by-Cycle Charge Undercurrent Protection
- 9.3.13 Input Overvoltage Protection (ACOV)
- 9.3.14 Input Undervoltage Lockout (UVLO)
- 9.3.15 Battery Overvoltage Protection
- 9.3.16 Cycle-by-Cycle Charge Overcurrent Protection
- 9.3.17 Thermal Shutdown Protection
- 9.3.18 Temperature Qualification
- 9.3.19 Timer Fault Recovery
- 9.3.20 PG Output
- 9.3.21 CE (Charge Enable)
- 9.3.22 Charge Status Outputs
- 9.3.23 Battery Detection
- 9.4 Device Functional Modes
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13器件和文檔支持
- 14機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
- RGE|24
散熱焊盤機械數據 (封裝 | 引腳)
- RGE|24
訂購信息
9.3.2 Battery Current Regulation
The ISET1 input sets the maximum fast-charging current. Battery charge current is sensed by resistor RSR connected between SRP and SRN. The full-scale differential voltage between SRP and SRN is 100 mV. Thus, for a 10-mΩ sense resistor, the maximum charging current is 10 A. The equation for charge current is:
VISET1, the input voltage range of ISET1, is from 0 V to 2 V. The SRP and SRN pins are used to sense voltage across RSR with default value of 10 mΩ. However, resistors of other values can also be used. A larger sense resistor gives a larger sense voltage and a higher regulation accuracy, but at the expense of higher conduction loss.