ETA9697 lithium battery charging +5V boost module

This is the main function verification module of ETA9697. [ETA9697 official website information portal](http://www.etasolution.com/w-cn/prod_det.html?id=128) ETA9697 is a power management IC designed for Bluetooth headset boxes. It is roughly equivalent to integrating a 4056 for charging lithium batteries and a synchronous DC-DC that boosts the lithium battery voltage to a fixed voltage of 5V. The highlights of this film are: * The standby power consumption is very low when 5V is open circuit, suitable for making something with low power consumption (the manual says 1uA, I I measured four pieces with this board, about 2.0~2.3uA); * And the efficiency curve in the manual shows that they have at least tested it (unlike some manufacturers who claim to have low-power LDOs and only pick the best-looking numbers to write) Go up (?) * The charging input has 16V and the withstand voltage can prevent your PD from being confused by the charging head * Boost output 5V/0.4A, 1.4Mhz switching frequency, the inductor occupies a small area * Easy to buy and relatively cheap, and this board does What's included: * Charge the lithium battery through USB, the charging current is set through the resistor, and there is a light when charging; * Elegant Type-C and elegant 5.1k resistor (? * The battery interface and 5V boost output are led out through the pin header; * 28mm * 12mm size, two-layer board, solder mask with windows in some places; What this board does not do: * The boost part of ETA9697 supports enable control, but I did not lead it out and directly pulled it up to the positive side of the battery; * ETA9697 supports The battery temperature is monitored through the NTC resistor. I did not lead it out and connected it to ground (turned off); * Considering the static power consumption issue, the 5V boost output does not reserve an indicator light position; ![WeChat picture_20220108203623.jpg] When I was filling in other pitfalls, I found this video very interesting, so I took it for a test. I got this board. It was made to replace the 4056 module I always have on Taobao. It also comes with a 5V booster. In addition to the TWS charging box, it probably also It is suitable for use in scenarios where the system is 5V and can be used for several months on a single charge, or in a 1S powered aircraft that integrates charging and a stable 5V for the control part at the same time... Maybe there are others? There is no time to fill in recently. There are too many pitfalls. Bi She has no idea what to do. There are still a bunch of pitfalls that are half-finished. Yuanxia Palace has not been hoeed yet (?). I may not reply to comments, so that’s it.