LT1510IS#PBF

LT1510 current mode PWM battery charger is the smallest, simplest, most efficient solution to fast-charge modern rechargeable batteries including lithium-ion (Li-Ion), nickel metal-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). 0.1ohm onboard current sense resistor makes the charging current programming very simple. One resistor (or a programming current from DAC) is required to set 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. It can charge batteries ranging from 2V to 20V. Ground sensing of current is not required and the battery’s negative terminal can be tied directly to ground. Applications include chargers for NiCd, NiMH and lithium batteries, step-down switching regulator with precision adjustable current limit.

• Saturating switch running at 200KHz gives high charging efficiency and small inductor size
• Charges NiCd, NiMH, lithium-ion batteries, 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 of 3µA, charging current soft start
• Shutdown control
• 16-lead plastic SO package
• Operating ambient temperature range from -40°C to 85°C

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