Product name：Vacuum cleaner PCBA
Description：
● Charging soft start
● Balanced charging function
● Charging indication function
● Bad battery detection function
● Low temperature stop charging function
● Fan motor overcurrent protection current
● Brush motor short circuit protection current
● Motor speed regulation

Parameter：
1. The maximum continuous discharge current is 10A +/-1A.
2.Motor start: Press and hold the power button for 2 seconds to start the motor
3. Frequency of high-speed rotation: high level 1900US, low level 100US, 2MS a cycle.
4. Fan motor over-current protection current: 15A +/-2A, over-discharge detection time: 2 seconds.
5. Brush motor short-circuit protection current: 0.9A+/-0.1A, short-circuit protection time is 2 seconds.
6. Press the speed control button once, the fan will change to a slow speed, the motor drive will change to a high level of 500US, a low level of 1500US, and a cycle of 2MS. Press again to change to high speed.
7. When the motor stops, after the high level of forward rotation changes to low level, there is a delay of 1 second before the output of reverse high level is about 500MS to brake.
8. The standby current of the whole machine is 30UA.
9. Working temperature range: -10℃~50℃.
10. Storage temperature range: -20℃~70℃.
11. Battery capacity: 2000MAH.