Output voltage: 9V

Output current: 50ma

The standby quiescent current is less than 10uA.

In the standby state, the boost is started after the load is greater than 2.xmA.

If the battery voltage is lower than 3.5V, reduce the output voltage to remind the device that it needs to be charged in time.

The low-pressure threshold adjustment can be set according to the description in the schematic diagram.

With low battery status output (reduce the output voltage to let the device recognize the low voltage), the threshold is adjustable.

TYPE-C charging interface with 4 lights power display.

TPS61040, load 8ma ripple as shown below, the output current of this chip is relatively small,

but there is no problem with the multimeter.

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MT3608, load 9ma ripple is no problem. The output current is larger.

Bill of materials