Introduction
Paraments
Module model: 800W30A adjustable power supply high-power step-down module
Module color: brand new
Power protection: Input low voltage protection (output is turned off when the input voltage is below 20V)
Input voltage: DC20-70V
Output voltage: DC2.5-58V
Input current: 20AMax
Output current: 30AMax
Output power: 800WMsx
Standby current: ≤ 70mA (input 24V and output 12V), different voltage and current may vary
Output ripple: 120mV, input 24V, output 12V/20A
Conversion efficiency: 0.92-0.96
Circuit structure: non isolated
Working temperature: -20~50 ℃
Module size: length, width, height 154mm * 75mm * 69mm
Product Features
1: This module uses high-performance original electronic components for more stable overall performance
2: Wide input and output voltage range, high output current and power
3: Input low voltage protection (turn off output when input voltage is below 20v)
4: Output constant voltage and current, continuously adjustable voltage and current.
5: There is an output current Test point, and the set value of the output current can be tested with the mv gear of the multimeter
6: There is an external voltage and current analog signal input terminal, which can be controlled by a microcontroller to adjust the voltage and current
7: There is an external output switch signal terminal, and after short circuiting, it becomes a standby switch
8: The input end MOs tube has anti reverse connection function, and the input end is connected to the reverse positive and negative poles without burning out. 9: Intelligent temperature controlled fan, with a module temperature increase of about 55 degrees to start the fan, and a module temperature decrease of about 50 degrees to turn off the fan
Application scope
1: This module can be used to input high voltage batteries to charge low voltage batteries
2: Various occasions that require high voltage drop to low voltage and high current.
3: Solar buck charging.
4: DIY is a step-down Dc adjustable module that can be replaced with external adjustable (voltage 100K, current 1K) for easy use. External adjustable wiring must be wound with high-quality multiple coils of wire, as poor quality can damage the module. The external wiring should not exceed 15cm
Instructions for use
1. The input and output cannot be reversed, and the positive and negative poles of the output cannot be reversed or shorted.
2. The maximum input peak voltage cannot exceed 78V. If it is too high, it may damage this module. Please use it within the voltage range.
3. The output voltage and current are continuously adjustable with constant voltage and current, increasing counterclockwise and decreasing clockwise, with a minimum current of 1A.
4. When the input voltage of the module is lower than 30V and the output voltage is lower than 12V, the output can be short circuited without damaging the module, and the Ammeter can be used for short circuit output to adjust the output current (but try to short circuit at low voltage).
5. When adjusting the output current, the current can be adjusted while measuring the reference point voltage of the output current using the mV range of the multimeter. Every 2mV is an output current of 1A, and the reference point voltage can be adjusted to the desired current.
6. The two diodes D 9 and D 10 can be changed into two LED light emitting diodes, which can be used as constant voltage and constant current working status indicator lights (can only be changed to the original position of the board, cannot be led out with wires)
Attention: Those who do not understand the technology should be cautious in making changes.
7. When adjusting the external analog signal of voltage and current, the external voltage signal is 0-5V, and attention should be paid to the positive and negative poles when connecting. Attention: When supplying power to external signals, a separate power supply is required and cannot share the same ground wire as this module, otherwise it may damage this module.
8. When external analog signal regulation is needed, two resistors need to be removed. When voltage regulation is needed, R38 (the second resistor behind the voltage signal port) needs to be removed. When current regulation is needed, R46 (the second resistor behind the current signal port) needs to be removed. At this time, the voltage and current can be adjusted separately to adjust the voltage and current. If adjustable correction is not needed, it can be replaced with corresponding fixed resistors.