DC20V-70V 30A 800W High Power DC-DC Buck Converter Adjustable Step Down Power Supply Constant Voltage Constant Current Regulator

DC20V-70V 30A 800W High Power DC-DC Buck Converter Adjustable Step Down Power Supply Constant Voltage Constant Current Regulator

Features:

1. High conversion efficiency

2. High-power original device, high-power and high-electricity double iron silicon aluminum magnetic ring

3. Anti-reverse connection of the input MOS tube (the input is not afraid of reverse connection) The output is adjustable with constant voltage and constant current

4. There is an output overcurrent protection indicator. There is an output indicator.

5. High-power profile aluminum radiator, intelligent temperature control fan for heat dissipation, high reliability, stable work

The main parameters:

Input voltage: DC20V-70V

Input current: 20A max

Output voltage: DC 2.5V-58V

Adjustable output current: 30A (MAX)

Output power: 800W (MAX)

Standby current: ≤70mA (input 24V, output 12V)

Output ripple: ≤120mV (input 24V, output 12V/20A)

Conversion efficiency: 92-96% (different voltage and current efficiency are different)

Circuit structure: non-isolated (BUCK)

Working temperature: -20~60℃

Instructions for use:

1. The input and output cannot be reversed, and the positive and negative poles of the output cannot be reversed or short-circuited.

2. The maximum input peak voltage cannot exceed 78V. Too high may damage the module. Please use it within the voltage range.

3. The output voltage and current are continuously adjustable with constant voltage and constant current, which can be adjusted counterclockwise to increase and clockwise to decrease, and the minimum current is 1A.

4. When the input voltage of this module is lower than 30V and the output is lower than 12V, the output can be short-circuited without damaging the module. You can use an ammeter to short-circuit the modulated output current (but try to short-circuit at low voltage).

5. When adjusting the output current, you can adjust the current and measure the reference point voltage of the output current with the mV gear of the multimeter. Every 2mV is 1A of output current. Adjust the reference point voltage as much as the current is needed.

6. The two diodes D9 and D10 can be changed to two LED light-emitting diodes, which can be used as constant voltage and constant current working status indicators (can only be changed on the original position of the board, not leaded by wires).

7. When the voltage and current are adjusted by external analog signals, the external voltage signal is 0-5V. Pay attention to the positive and negative poles when connecting. Note: When the external signal is powered, a separate power supply is required, and it cannot share the ground wire with the module, otherwise the module may be damaged.

8. When you need to adjust the external analog signal, you need to remove two resistors. When you need to adjust the voltage, remove R38 (the second resistor behind the voltage signal port), and when you need to adjust the current, remove R46 (the second resistor behind the current signal port). ), at this time, the two adjustable voltage and current are respectively changed into the adjustment adjustment of voltage and current. If the adjustment adjustment is not needed, the adjustable can be changed to the corresponding fixed resistance

9. This module is not suitable for loads with motors and large starting currents.

10. The maximum output power of this module is 800w. When the output voltage is below 26V, the maximum output current can reach 30A. When the output voltage is higher than 26V, the output current is reduced accordingly. This data is for reference only, and the actual use environment and conditions shall prevail.

11. The MOS tube anti-reverse connection and current detection of this module are at the negative terminal (ground wire). When the output requires constant current and current limiting, the negative terminals of the input and output cannot be shared or short-circuited, and must be separated.

12. When using, please add heat dissipation to the module according to different environments and the size of the load.

13. Description of input and output voltage difference:

A: Input 70V, maximum output 58V. B: Input 60V, maximum output 49V. c: Input 50V, maximum output 40V.

D: Input 40v, maximum output 32V. E: Input 30V, maximum output 24V. F: Input 20V, maximum output 16V.

The main function:

1. High-power solar street lamp driver

2. DIY adjustable constant voltage and constant current power supply

3. Constant current drive for various LED lighting

4. Solar charging power supply

5. Power supply for vehicles and various mobile devices

6. Charge various batteries

Precautions:

1. When the input and output voltage is higher than 36V, please pay attention to the safety of electricity to prevent electric shock.

2. When working with high current, please tighten the screws of the terminal block.

3. When working, the input and output voltage and current can not exceed the maximum value, so as not to damage the power supply.

4. Pay attention to ventilation and heat dissipation when working with full load for a long time to extend the service life of the power supply.

5. Pay attention to dust and moisture.

List:

Step-down power supply module*1