ZHCSHH4L March 2000 – January 2018 LM317L-N
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1 Application Information
- 8.2
Typical Applications
- 8.2.1 1.25-V to 25-V Adjustable Regulator
- 8.2.2 Digitally-Selected Outputs
- 8.2.3 High Gain Amplifier
- 8.2.4 Adjustable Current Limiter
- 8.2.5 Precision Current Limiter
- 8.2.6 Slow Turnon 15-V Regulator
- 8.2.7 Adjustable Regulator With Improved Ripple Rejection
- 8.2.8 High Stability 10-V Regulator
- 8.2.9 Adjustable Regulator With Current Limiter
- 8.2.10 0-V to 30-V Regulator
- 8.2.11 Regulator With 15-mA Short-Circuit Current
- 8.2.12 Power Follower
- 8.2.13 Adjusting Multiple On-Card Regulators With Single Control
- 8.2.14 100-mA Current Regulator
- 8.2.15 1.2-V to 12-V Regulator With Minimum Program Current
- 8.2.16 50-mA Constant Current Battery Charger for Nickel-Cadmium Batteries
- 8.2.17 5-V Logic Regulator With Electronic Shutdown
- 8.2.18 Current-Limited 6-V Charger
- 8.2.19 Short Circuit-Protected 80-V Supply
- 8.2.20 Basic High-Voltage Regulator
- 8.2.21 Precision High-Voltage Regulator
- 8.2.22 Tracking Regulator
- 8.2.23 Regulator With Trimmable Output Voltage
- 8.2.24 Precision Reference With Short-Circuit Proof Output
- 8.2.25 Fully-Protected (Bulletproof) Lamp Driver
- 8.2.26 Lamp Flasher
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
訂購信息
8.2.18 Current-Limited 6-V Charger
The current in a battery charger application is limited by switching between constant-current and constant-voltage states (see Figure 34). When the battery pulls low current, the drop across the 1-Ω resistor is not substantial and the NPN remains off. A constant voltage is seen across the battery, as regulated by the resistor divider. When current through the battery rises past peak current, the 1 Ω provides enough voltage to turn the transistor on, pulling ADJ close to ground. This results in limiting the maximum current to the battery.
*Sets peak current, IPEAK = 0.6 V/R1
**1000 μF is recommended to filter out any input transients.
Figure 34. Current Limited 6-V Charger
**1000 μF is recommended to filter out any input transients.