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
9.3.4 Precharge
On power up, if the battery voltage is below the VLOWV threshold, the BQ2461x applies the precharge current to the battery. This feature is intended to revive deeply discharged cells. If the VLOWV threshold is not reached within 30 minutes of initiating precharge, the charger turns off and a FAULT is indicated on the status pins.
The precharge current is determined by the voltage, VISET2, on the ISET2 pin.
Equation 4. 