Step down converter with adjustable current and voltage possibility

These step down converters are extremely suitable as a driver for high-power LEDs, and the charging of batteries such as Li-Ion and Ni-Mh. The module has a high input voltage range of up to 32 volts and works according to Step Down principle or also called Buck Converter

The current and voltage can be adjusted by means of 2 Trimmers, a 3rd is for adjusting intervals

The specifications of this module are as follows

Operating voltage: 5 to 35V
Maximum Power: 3A
Output Voltage: Continuously adjustable from 1.25 V to 30 V

• Dropout voltage : 1.5V, there must be 1.5 volt difference between the input and output
  
• Constant Charge current indicator LED, Charge Indicator LED, very fine and continuously adjustable
  
• Dimensions : 48mm (L) X 24mm (W) X 11.4mm (H), Potmeter not included (With potmeters: height 13 mm).

• Module shape : Non-isolated step-down constant current. Constant voltage module (CC CV). Load or Drive module.
  
• Application use : Constant LED Power source driver, Lithium Battery charger (including ferroelectric), 4V, 6V, 12V, 14V, 24V Battery Charger, NiCd and NiMH Batteries, Can be used as a controller for solar panels and wind generators.
  
• Output voltage:
  1. Continuously Adjustable (1.25-30V adjustable) with Load Regulation
  2. Static output required between 1.25-30V.
  
• Adjustable mode : Connect the module (7-35V), measure the voltage at the output (use a multimeter) and set the potentiometers (Clockwise Boost or Step Up, Counter clockwise buck or Step Down).
  
• Maximum output power : 3A, (If you purchase more than 15, a heat sink is recommended.).
  
• Efficiency : 92% (maximum 92% (The higher the voltage, the higher the efficiency)
  
• Output Ripple : 20M bandwidth (only for reference)
  
• Working temperature: industrial grade (-40 ℃ to +85 ℃) (when the ambient temperature exceeds 40 degrees, the use must be reduced, or improved heat dissipation must be ensured
  
• Standby current : 10mA (12V 4.2V)
  
• Load Regulation rate : + 1%
  
• Voltage regulation : 0.5%
  
• Response time : 5% 200uS
  
• Indicator s: Constant power indicator LED is red, Charge LED is red, Charging complete indicator LED is blue.
  
• Output Short circuit protection : YES, constant current setting
  
• Connection : Wires can be soldered directly to the PCB
  
  
  
  Download here the Specsheet of the step down converter