LT LT1769CGN#PBF

Multi-Chemistry2A0°C ~ 70°C (TA)

Overview

The LT1769CGN current mode PWM battery charger is a simple, 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 2A** DC current (3A peak current). Charge current can be programmed by resistors or a DAC to within 5%. With 0.5% reference voltage accuracy, the LT1769CGN meets the critical constant-voltage charging requirement for Li-Ion cells.

The LT1769CGN can charge batteries ranging from 1V to 20V. Ground sensing of current is not required and the battery’s negative terminal can be tied directly to ground. A saturating switch running at 200kHz gives high charging efficiency and small inductor size. A blocking diode is not required between the chip and the battery because the chip goes into sleep mode and drains only 3µA when the wall adapter is unplugged.

Features

Applications

• Maintenance shops
• Rental fleets
• Truck dealers
• Floor scrubber
• Material handling
• Man lift
• Boat
• Cellphones
• Laptops
• Tablets