DC-DC Buck Converter Adjustable 7-40V to 1.2-3.5V Step Down Power Supply Module 300W Power Supply Board LED Driver for Arduino
Features:
Double fin design, better heat dissipation.
Two-color indicator light, working state at a glance, adjustable voltage, high adjustment precision.
Large size ferrosilicon magnetic ring and pure copper double wire are used to reduce heat and improve efficiency.
With professional reference IC and high precision sampling resistance, the constant current is more stable, especially suitable for LED driver.
The high frequency capacitor can effectively reduce the output ripple and improve the working stability. The output current is up to 8A, which can meet most needs.
Application scope: LED drive, LED display drive, lead battery, lithium battery charging, vehicle power supply, regulated power supply, low voltage system power supply, etc.
Specification:
Input voltage: 7-40V
Output voltage: Continuously adjustable 1.2-35V
Output current: ≤8A(If the power tube temperature exceeds 65 degrees, add fan heat dissipation)
Constant current range: 0.2-8A(" No constant current "does not have this function)
Rotating lamp current: constant current value*(0.1)[Rotating lamp current and constant current linkage, such as the constant current value is 3A, the rotating lamp current is set to 0.1 times of the constant current (0.1*3A=0.3A), when the constant current value is adjusted to 2A, this time to turn the lamp
The current is 0.1 times of the constant current (0.1*2A=0.2A). The fixed rotating lamp current is 0.1 times of the constant current value (charging
Is used to identify if the battery is fully charged.)
Minimum pressure difference: 1V
Output power: <300W
Conversion efficiency: <95%
Operating frequency: 180KHZ
Output ripple: about 50mV (for reference only) [20M band width without noise input 24V output 12V 5A]
Operating temperature: -40° C to +85 C
No-load current: typical 20mA (24V to 12V)
Load adjustment rate: soil 1%(constant pressure)
Voltage adjustment rate: 1%
Dynamic response speed: 5% 200uS
Output short-circuit protection: Yes, constant current (current value set at present)
Input reverse protection: No
Output against countercurrent: No
Instructions for use
Potentiometer adjustment direction:
Clockwise, increase, counterclockwise, decrease
Indicator status:
Charging, red
Charge done, green
No load, green; Those without constant current are red
Battery charging use method:
1. Determine the floating charging voltage and charging current of the battery you need to charge, and the input voltage of the module.
2 Adjust the constant voltage potentiometer, the output voltage to about 5V.
3. Use a multimeter 10A current stop to measure the output short-circuit current, and adjust the constant current potentiometer to make the output current reach the predetermined charging current value.
4. Adjust the constant voltage potentiometer so that the output voltage reaches the floating charging voltage.
5. Connect the battery and test charge it (Step 1, 2, 3, 4: Input power supply, output no battery).
LED constant current driving method
1. Determine the operating current and maximum operating voltage you need to drive the LED.
2 Adjust the constant voltage potentiometer, the output voltage to about 5V.
3. Measure the output short-circuit current with the current stop of table 10A, and adjust the constant current potentiometer to make the output current reach the predetermined LED working current.
4. Adjust the constant voltage potentiometer to make the output voltage reach the highest working voltage of LED.
5. Connect the LED and test the machine (step 1, 2, 3, 4 for the module input power supply, output no load connected to LED lights).
Note:
1. Due to the light and screen difference, the item's color may be slightly different from the pictures.
2. Please allow 1-3cm differences due to manual measurement.
Package Included:
1x Buck Power Supply Board