LT1511CSW#PBF | Linear Technology

Battery Charging IC, LT1511CSW#PBF, Linear Technology

The LT1511CSW#PBF current mode PWM battery charger is the 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 3A DC current (4A peak current). Full-charging current can be programmed by resistors or a DAC to within 5%. With 0.5% reference voltage accuracy, the LT1511CSW#PBF meets the critical constant-voltage charging requirement for Li-Ion cells. A third control loop is provided to regulate the current drawn from the AC adapter. This allows simultaneous operation of the equipment and battery charging without overloading the adapter. Charging current is reduced to keep the adapter current within specified levels.

Features

• Adjustable Undervoltage Lockout
• Automatic Shutdown When AC Adapter is Removed
• Current Sensing Can Be at Either Terminal of the Battery
• Charging Current Soft Start
• Shutdown Control

Applications

• Chargers for NiCd, NiMH, Lead-Acid, Lithium
• Rechargeable Batteries
• Switching Regulators with Precision Current Limit