ETA9697蓝牙耳机TWS充电盒5V常开低功耗1UA输入耐压20V兼容全市场耳机方案IC列如：瑞昱、CSR、洛达方案IC
发布时间：2019-4-3 23:20
发布者：missakl
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深圳市展嵘电子有限公司 有需要的上帝可联系小陈：136-6225-3950 : 3412-1522-98 ETA9697 is an ultra low power PMU with 2 channels: a 16/ single cell Libattery linear charger and a 5V Boost synchronous converter with trueshutoff function. The linear charger fully integrated constant Current((O)/Istant voltage(CV)control module and charge FE, With minimalextemal devices. It also has pre-charge funct on for trickle charging deeplydischarged battery and its fast charge current can be programmed by anexternal resistor. When (V Charge stage is entered, charge will beterminated once the charge current drops to 1/10 of the programmed valueA"STAT"pin is also available to indicate the charge status. And the lowpower 5V Boost converters apable of delivering 0.4A current at 5V output.It can be shut down by puling ENBST low, it disconnect the output fromthe BAI to further decrease the system standby power. Its 1. 4MHZswitching frequenc enable a very small external inductor with inductanceas low as 2.2UH The ETA9697, asa whole, is an ideal for the system solutionthat requires very low standby power and compact PCB board size  [size=0.83em]FEATURESe Ultra low When standby, Ibat 其次，TWS耳机电池盒电源PCBA还需要对外给TWS蓝牙耳机供电，这时又会将锂离子电池升压为5V，然后输出给耳机，耳机通过内部的充电电路完成对内置电池的充电。如此一来，当TWS耳机需要用电的时候，就可以放回充电盒自动补充电量。 充电盒升压芯片也分为同步和非同步两种，其中同步架构的效率高、发热低，非同步整流效率低一些，和移动电源的道理是一样的 |
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