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深圳市展嶸電子有限公司 有需要的上帝可聯系小陳：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 FEATURESe Ultra low When standby, Ibat 其次，TWS耳機電池盒電源PCBA還需要對外給TWS藍牙耳機供電，這時又會將鋰離子電池升壓為5V，然后輸出給耳機，耳機通過內部的充電電路完成對內置電池的充電。如此一來，當TWS耳機需要用電的時候，就可以放回充電盒自動補充電量。 充電盒升壓芯片也分為同步和非同步兩種，其中同步架構的效率高、發(fā)熱低，非同步整流效率低一些，和移動電源的道理是一樣的 |
