USB-C Rechargeable 5/7/9V Fan Speed Controller Board with Boost Output(Type-C)

Boost Board 9V Fan Control Board Key benefits - Compact size allows installation in devices with limited space, making it suitable for portable fan designs and small appliances. - Built-in boost converter raises a 3.7 V battery to selectable 5 V, 7 V, or 9 V outputs, enabling use of motors with different voltage requirements. - Extremely low standby current helps extend battery runtime during idle periods. - Clear LED indicators and a three-stage switch provide simple, reliable control of fan speed and output voltage. - Reverse polarity protection at both battery and fan connectors improves safety and reduces the risk of damage during installation. Main features - Miniaturized control board measuring 35.6 mm by 27 mm for easy integration into compact housings. - Input: USB Type-C 5 V charging input for battery charging and board power. - Output stages: 1 = 5 V, 2 = 7 V, 3 = 9 V, plus a 4th stage that functions as a shutdown cycle. - LED indicators: red LED indicates 5 V (stage 1), green LED indicates 7 V (stage 2), blue LED indicates 9 V (stage 3). - Maximum recommended output current: do not exceed 0.6 A. - Very low standby current (for example 10 microampere), which reduces idle power draw. - Battery connector: PH2.0 jack compatible with 4.2 V ternary lithium battery or polymer lithium battery such as 18650 cells, with reverse polarity protection at the battery end. - Fan connector: PH2.0 jack with reverse polarity protection, suitable for brushless motors of 5 to 8 inch size and rated up to 9 V 600 mA on the highest speed. - Supports simultaneous charging and discharging when connected to a 3.7 V battery and a 5 W charging source. - If no battery is connected, the board can operate only in the lowest output stage. - Mechanical details: button height approximately 6 mm and panel hole diameter approximately 2.5 mm. Compatibility and limitations - Designed for small rechargeable fan applications using 3.7 V lithium cells or similar polymer lithium batteries. - Intended for brushless fan motors between 5 inch and 8 inch, with the highest stage providing 9 V at up to 600 mA. - Total output current should not exceed 0.6 A to avoid damage or shutdown. - Supplied wiring may require red and black leads to be swapped if used to connect to the fan side. Package contents - 1 x 3.7 V fan motor speed controller board with Type-C charging, rechargeable small fan circuit control board and stepless speed regulator module. Typical applications - Handheld rechargeable fans: compact integration with a single 18650 cell to provide multiple speed settings and long standby life. - Small desktop or clip-on fans: boost a low-voltage battery to drive 5 to 8 inch brushless motors while supporting pass-through charging. - DIY portable cooling projects: use the compact board to add selectable voltages and built-in protection to battery-powered prototypes or custom enclosures. This control board offers a space-saving solution for portable fan designs by providing selectable boosted outputs, low standby consumption, reverse polarity protection, and simultaneous charge and discharge support.