The module adopts a step-by-step rectification scheme, which has extremely high efficiency, and the highest efficiency is as high as 96%. The output voltage and current are continuously adjustable. The input voltage can reach up to 95V, and the output voltage can reach up to 90V. There is an input anti-reverse connection, and the positive and negative connections not burn. With soft start switch. Output current adjustment: set the multimeter or ammeter to 20A or 10A current position, adjust the power supply voltage to 5V, turn the constant current potentiometer counterclockwise for about 10 turns, adjust the current to the minimum, use the multimeter to short-circuit the output, and then adjust clockwise The potentiometer adjusts the current to the required current value; The current detection of the module is a low-end detection. Please do not directly short-circuit the negative pole of the input and the negative pole of the output with a wire. The short-circuited negative power supply not have a constant current, which cause damage to the power supply and electrical equipment that requires constant current. The module is a step-down power supply that can only but not step up, and the input voltage must be higher than the output voltage. Conversion efficiency: up to 96% (efficiency is related to input and output voltage, current, and differential pressure); Short circuit protection: yes (constant current protection); Input reverse connection protection: Yes (MOS tube reverse connection). Output anti-backfeed: None (to charge the battery, the output is connected to an inductive load, such as an anti-backfeed diode must be added to the motor) Module name: 500w step-down constant voltage constant current adjustable power module Module properties: non-isolated step-down module Input voltage: 12-95V Output voltage range: 1.5-90V (can only , not step up, the output voltage can only be lower than the input voltage) Input and output pressure difference: 2V Output constant current: 0.3-18A (continuously adjustable) Output rated current: 15A Output rated power: 400w Input overvoltage protection: None (overvoltage prohibited) Working temperature: -10-+65 degrees Working frequency: 120KHz Precautions: 1. If the input voltage exceeds 36V, first turn the ON/OF switch to OF, and then turn the switch to ON after connecting the wires and powering on (to prevent ignition during wiring) 2. This power supply is a step-down power supply, the output voltage can only be lower than the input voltage 3. In the case of natural heat dissipation, the power does not exceed 400W, and the current does not exceed 15A. There is a power limit. If the output voltage is high and the input and output pressure difference is large, please reduce the current to use 4. If the current exceeds 15A and the power exceeds 400W, please add a fan to dissipate heat Colour:As Shown Material:Metal+Plastic Package Contents: 1 * Power module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.