Lithium-Ion Linear Battery Charger with Thermistor Interface By LTC4050
Lithium-Ion Linear Battery Charger with Thermistor Interface LTC4050, pdf file
The LTC® 4050-4.1/LTC4050-4.2 are complete standalone constant-current/constant-voltage linear charge control-lers for lithium-ion (Li-Ion) batteries. Charge current is programmable and final float voltage has ±1% accuracy.
When the input supply is removed, the LTC4050 automatically enters a low quiescent current sleep mode, dropping the battery drain current to 5µA. An internal comparator detects the near-end-of-charge (C/10) condition while a
programmable timer, using an external capacitor, sets the total charge time. Fully discharged cells are automatically trickle charged at 10% of the programmed current until cell voltage exceeds 2.49V. The thermistor interface
suspends charging if the cell temperature is outside of a 0°C to 50°C temperature window.
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