LT1511CSW#PBF

LT1511 is a 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, this device 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. It is widely used in application such as chargers for NiCd, NiMH, lead-acid, lithium, rechargeable batteries, switching regulators with precision current limit etc.

• Precision 0.5% accuracy for voltage mode charging
• High efficiency current mode PWM with 4A internal switch
• 5% charging current accuracy, supply current is 4.5mA typical
• Adjustable undervoltage lockout
• Automatic shutdown when AC adapter is removed
• Low reverse battery drain current is 3µA typical
• Charging current soft-start, shutdown control
• Current sensing can be at either terminal of the battery
• Operating ambient temperature is 0°C to 70°C
• Package style is 24-lead plastic wide SO

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