Linear LTC4120无线充电接收和发送解决方案

Linear公司的LTC4120是无线电源接收器和 400mA 降压型电池充电器,具有动态协调控制可优化宽耦合范围内的无线充电,宽输入电压从4.3V 至 40V,可调电池浮动电压从3.5V 至 11V,采用单个电阻器设置的 50mA 至 400mA 充电电流, ±1%反馈电压准确度, 准确度为 5% 的可编程充电电流,以及无需微处理器和无变压器磁芯等特性,主要用在手持仪表,工业/军用传感器,手持医疗设备以及电隔离设备.本文介绍了LTC4120主要特性,框图,典型应用电路以及演示板DC1969A主要特性,电路图和材料清单.

The LTC.4120 is a constant-current/constant-voltage wireless receiver and battery charger. An external programming resistor sets the charge current up to 400mA. The programmable float voltage of the LTC4120 accommodates several battery chemistries. 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.
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