LTC4120EUD-4.2#PBF

LINEAR TECHNOLOGY  LTC4120EUD-4.2#PBF  电池充电器, 用于1节锂离子, 锂聚合物电池, 40V输入, 4.2V / 421mA充电, QFN-16

The is a wireless Power Receiver and 400mA Buck Battery Charger suitable for charging Li-ion/Polymer batteries. An external programming resistor sets the charge current up to 400mA. The LTC4120 uses a Dynamic Harmonization Control DHC technique that allows high efficiency contactless charging across an air gap. The LTC4120 regulates its input voltage via the DHC pin. This technique modulates the resonant frequency of a receiver tank to automatically adjust the power received as well as the power transmitted to provide an efficient solution for wirelessly charging battery-powered devices. Wireless charging with the LTC4120 provides a method to power devices in harsh environments without requiring expensive failure-prone connectors. This allows products to be charged while locked within sealed enclosures or in moving or rotating equipment or where cleanliness or sanitation is critical.

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Dynamic harmonization control optimizes wireless charging over a wide coupling range

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Wide input voltage range 12.5 to 40V

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Fixed 4.2V float voltage option

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50 to 400mA Charge current programmed with a single resistor

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±1% Feedback voltage accuracy

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Programmable 5% accurate charge current

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No microprocessor required

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No transformer core