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With switching frequency as high as 200kHz, The LT1510 current mode PWM battery charger is the smallest, simplest, most efficient solution to fast-charge modern rechargeable batteries including lithium-ion (Li-Ion), nickelmetal-hydride (NiMH)* and nickel-cadmium (NiCd)* that require constant-current and/or constant-voltage charging. The internal switch is capable of delivering 1.5A DC current (2A peak current). The 0.1ohm onboard current sense resistor makes the charging current programming very simple. One resistor (or a programming current from a DAC) is required to set the full charging current (1.5A) to within 5% accuracy. The LT1510 with 0.5% reference voltage accuracy meets the critical constant-voltage charging requirement for lithium cells.
* Charges NiCd, NiMH and Lithium-Ion Batteries — Only One 1/10W Resistor Is Needed to Program Charging Current * High Efficiency Current Mode PWM with 1.5A Internal Switch and Sense Resistor * 3% Typical Charging Current Accuracy * Precision 0.5% Voltage Reference for Voltage Mode Charging or Overvoltage Protection * Current Sensing Can Be at Either Terminal of the Battery * Low Reverse Battery Drain Current: 3uA * Charging Current Soft Start * Shutdown Control
* Chargers for NiCd, NiMH and Lithium Batteries * Step-Down Switching Regulator with Precision Adjustable Current Limit
*NiCD and NiMH batteries require charge termination circuitry.