ZHCSRG2G May 2001 – December 2022 BQ2057C
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 说明（续）
- 6 Device Comparison Table
- 7 Pin Configuration and Functions
- 8 Specifications
- 9 Detailed Description
-
10Application and Implementation
- 10.1
Application Information
- 10.1.1 Functional Description
- 10.1.2 Qualification and Precharge
- 10.1.3 Current Regulation Phase
- 10.1.4 Voltage Regulation Phase
- 10.1.5 Charge Termination and Recharge
- 10.1.6 Battery Temperature Monitoring
- 10.1.7 Charge Inhibit Function
- 10.1.8 Charge Status Indication
- 10.1.9 Low-power Sleep Mode
- 10.1.10 Selecting an External Pass-Transistor
- 10.1.11 Selecting Input Capacitor
- 10.1.12 Selecting Output Capacitor
- 10.1.13 Automatic Charge-rate Compensation
- 10.2 Typical Application
- 10.1
Application Information
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
封装选项
请参考 PDF 数据表获取器件具体的封装图。
机械数据 (封装 | 引脚)
- D|8
- DGK|8
- PW|8
散热焊盘机械数据 (封装 | 引脚)
订购信息
10.1.2 Qualification and Precharge
When power is applied, the BQ2057 starts a charge-cycle if a battery is already present or when a battery is inserted. Charge qualification is based on battery temperature and voltage. The BQ2057 suspends charge if the battery temperature is outside the V(TS1) to V(TS2) range and suspends charge until the battery temperature is within the allowed range. The BQ2057 also checks the battery voltage. If the battery voltage is below the precharge threshold V(min), the BQ2057 uses precharge to condition the battery. The conditioning charge rate I(PRECHG) is set at approximately 10% of the regulation current. The conditioning current also minimizes heat dissipation in the external pass-element during the initial stage of charge. See Figure 10-3 for a typical charge-profile.
Figure 10-4 0.5-A
Charger Using P-Channel MOSFET