ZHCSH33Y September 1997 – April 2020 LM317
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Device Comparison Table
- 6 Pin Configuration and Functions
- 7 Specifications
- 8 Detailed Description
-
9 Application and Implementation
- 9.1 Application Information
- 9.2 Typical Application
- 9.3
System Examples
- 9.3.1 0-V to 30-V Regulator Circuit
- 9.3.2 Adjustable Regulator Circuit With Improved Ripple Rejection
- 9.3.3 Precision Current-Limiter Circuit
- 9.3.4 Tracking Preregulator Circuit
- 9.3.5 1.25-V to 20-V Regulator Circuit With Minimum Program Current
- 9.3.6 Battery-Charger Circuit
- 9.3.7 50-mA Constant-Current Battery-Charger Circuit
- 9.3.8 Slow Turn-On 15-V Regulator Circuit
- 9.3.9 AC Voltage-Regulator Circuit
- 9.3.10 Current-Limited 6-V Charger Circuit
- 9.3.11 Adjustable 4-A Regulator Circuit
- 9.3.12 High-Current Adjustable Regulator Circuit
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
封装选项
机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息
9.3.7 50-mA Constant-Current Battery-Charger Circuit
The current limit operation mode can be used to trickle charge a battery at a fixed current. ICHG = 1.25 V ÷ 24 Ω. VI should be greater than VBAT + 4.25 V. (1.25 V [VREF] + 3 V [headroom])
Figure 18. 50-mA Constant-Current Battery-Charger Circuit