Lemontree

Handheld Mini Three-speed Fan [Using FM5001H]

Overview

1. Product Introduction:
A low-cost portable fan control board that integrates lithium battery charging management, lithium battery protection, DC-DC boost current limiting, 3-speed adjustable air volume fan drive function, and lithium battery power supply.

2. Application scenario:

portable fan

main control board damaged fan

3. Product Overview:
It integrates the charging methods including trickle charging, constant current charging and constant voltage charging, with charging indication and full power indicator.
Supports fan drive function, built-in 3-speed adjustable air volume control. Supports discharge LED indication. When the battery voltage is less than 2.9V, the system enters the undervoltage state, and the current of the entire system is 30uA; built-in constant constant current charging current is 600mA.

Suitable for homemade fans and fans with damaged main control boards.

4. Product parameters:
1. Power supply: 4.2V, 4.35V lithium battery
2. Can output 5V 7V 9V three-speed fan voltage
3. Two-layer PCB design
4. Board size: 18.977mm x 19.96mm
SMD aluminum electrolytic capacitor 100UF can be replaced with MLCC or omitted

5. Test video

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-23 23:33:26

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