The LTC4008EGN#PBF is a 4A high efficiency Multi-chemistry Battery Charger where the PWM controller uses a synchronous, quasi-constant frequency, constant off-time architecture that will not generate audible noise even when using ceramic capacitors. Charging current can be monitored as a voltage across the programming resistor. An external resistor divider and precision internal reference set the final float voltage. The LTC4008 includes a thermistor sensor input that will suspend charging if an unsafe temperature condition is detected and will automatically resume charging when battery temperature returns to within safe limits, a FAULT pin indicates this condition. A FLAG pin indicates when charging current has decreased below 10% of the programmed current. An external sense resistor programs AC adapter current limiting. The ICL pin indicates when the charging current is being reduced by input current limiting so that the charging algorithm can adapt.
- General purpose charger controller
- High conversion efficiency up to 96%
- Output currents exceeding 4A
- ±0.8% Voltage accuracy
- AC adapter current limiting maximizes charge rate
- Thermistor input for temperature qualified charging
- Wide input voltage range (6 to 28V)
- Wide output voltage (3 to 28V)
- 0.5V Dropout voltage, 98% maximum duty cycle
- Programmable charge current (±4% accuracy)
- Indicator outputs for charging, C/10 current detection, AC adapter present, input current limiting
- Charging current monitor output
计算机和计算机周边, 便携式器材, 电源管理
(EN)
