300W 12A DCDC Buck Converter Adjustable Power Supply Module with Precise Voltage Control

Nonisolated DC stepdown CC CV charging module designed for precise voltage and current control in compact applications. Key benefits Combines constant current and constant voltage regulation for reliable battery charging and LED or electronic device powering Wide input range accepts DC 732V for compatibility with common DC sources Continuously adjustable output voltage from 0.8 to 28V and adjustable constant current from 0.2 to 12A for flexible use conversion efficiency up to about 95 percent and maximum output power around 300W for efficient energy use Fast dynamic response and low ripple for stable operation in testing and powering sensitive electronics Main features and specifications Module type: nonisolated stepdown constant current constant voltage module Input voltage: DC 732V Output voltage: DC 0.828V continuously adjustable Output current: 9A 12A (note two current ratings listed; please observe thermal limits) Constant current adjustable range: 0.212A Turn lamp current: proportional to constant current setting at 0.1 times the constant current (for example, 3A constant current yields 0.3A turn lamp current) Lowest pressure: 1V Maximum output power: approximately 300W Conversion efficiency: up to about 95 percent Operating frequency: 300 kHz Output ripple: measured over 20 MHz bandwidth; example ripple: input 24V output 12V at 5A around 50 mV excluding noise Output short circuit protection: yes, operates in constant current mode when shorted Input reverse polarity protection: none Output backflow prevention: none Wiring: terminal connections Noload current: typical 20 mA (24V input switching to 12V) Load regulation: plus or minus 1 percent in constant mode Voltage regulation: plus or minus 1 percent Dynamic response: 5 percent within 200 microseconds Potentiometer directions: clockwise increases, counterclockwise decreases; CV potentiometer near input regulates voltage, CC potentiometer near output regulates current Operating temperature: industrial grade minus 40 C to plus 85 C; monitor power transistor temperature and provide forced cooling if the power tube exceeds 65 C Indicator: dual color LED. Red indicates charging, green indicates fully charged or no load Size (approx): 65 x 47 x 22 mm (L x W x H) Package contents 1 Pcs DC Buck Converter Module Practical applications Battery charging: set constant current and constant voltage parameters to charge 12V battery packs from higher voltage DC sources while monitoring the indicator LED LED driving: supply constant current to LED arrays with adjustable current limit and tight voltage control for consistent brightness Bench power and testing: use as an adjustable DC supply for electronics testing, prototyping, and where precise current limiting and fast dynamic response are required Important usage notes This module is nonisolated. Take appropriate safety precautions when connecting to systems that require isolation. There is no input reverse polarity protection and no output backflow prevention. Observe correct polarity and consider external protection if required. If the power transistor temperature exceeds 65 C during use, provide additional cooling such as a fan to maintain reliable operation Follow correct wiring practices when connecting to terminals and verify settings before applying load This module is suited for compact, efficient DC to DC stepdown applications requiring flexible CC and CV control, efficiency, and fast response in industrial temperature ranges.