Product Description

DC-DC high-power 10A step down transformer adjustable module

LED drive vehicle power module

Module parameters
Module property: non-synchronous rectification constant current constant pressure module CC CV charging module
Scope of application: high-power LED constant current drive, lithium battery (including ferroelectric), 4 v, 6 v, 12 v, 14 v, 24 v battery rechargeable nimh battery, nickel cadmium battery charging, solar panels, wind turbines
Input voltage: 7-40v
Output voltage: continuous adjustable (1.25-35v) (applicable to an application whose input voltage is higher than the output voltage cannot be promoted)
(power tube temperature over 65 degrees please add fan heat dissipation, 24V to 12V 5A is normally used without fan)
Constant current range: 0.3-10a (regulation) module more than 65 degrees please fan.
Turn lamp current: constant current value (0.1), turn the lamp current and constant current value linkage, such as constant current value of 3 A, turn the lamp current is set to 0.1 times that of the constant current (0.1 * 3 A = 0.1 A), when the value of the constant current regulation into 2 A, turn the lamp current is 0.1 times that of the constant current (0.1 * 2 = 0.2 A) A.
The subversion is fixed 0.1 times (the actual turning of the current is not very accurate) for charging instructions.

. Low pressure difference: 1V
Conversion efficiency:. High about 95% (the higher the output voltage, the higher the efficiency)
Working frequency: 300KHZ
Output ripple: about 50 mv (no noise), 20M bandwidth (for reference only) input 24V output 12V 5A
Working temperature: industrial grade (- 40 ℃ to + 85 ℃) (actual use, please pay attention to the power tube temperature, temperature is too high, please strengthen the cooling)
No-load current: typical 20mA(24V to 12V)
Load adjustment rate: plus or minus 1% (constant pressure)
Voltage adjustment rate: plus or minus 1%
Constant current accuracy and temperature: actual test, the temperature of the module changes from 25 to 60 degrees, and the constant current value change is less than 5% (constant current value 5A).
Dynamic response speed: 5% 200uS
Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease)
Indicator light: double color indicator light, red in charge, green light (no load is green)
Output short circuit protection: yes, constant current (current set constant current value)
Input reverse protection: no,
Output anti-reflux irrigation: no, it is used for charging the battery and the 2 electrode tube!
Connection mode: terminal
Module size: 65*47*23.5MM

Battery charging method:
1. Determine the charging and charging current of the charging battery and the input voltage of the module;
2. Adjust the constant voltage potentiometer and adjust the output voltage to about 5V.
3. Use multimeter 10A current to measure the short-circuit current of the output, and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;
4. Adjust the constant voltage potentiometer to make the output voltage reach the floating charging pressure;
5. Connect the battery and try charging.
(1, 2, 3, 4 steps to input the input power for the module, and the output is free of battery.)

LED constant current drive usage:
1. Determine that you need to drive the LED's working current and the high working voltage;
2. Adjust the constant voltage potentiometer and adjust the output voltage to about 5V.
3. Use multimeter 10A current to measure the short-circuit current of the output, and adjust the constant current potentiometer to make the output current reach the scheduled LED working current;
4. Adjust the constant voltage potentiometer to make the output voltage reach the LED.
5. Connect the LED and try the machine.
(1, 2, 3, 4 steps for the input power of the module, the output is free of LED lights.)

Application scope:
High-power adjustable power supply (10 a), high power LED driver, LED display driver, lead batteries, lithium batteries, car power, on-board laptop power supply (buck), regulated power supply, low voltage system, (such as children's toy car 12 v battery step-down to 6 v) 12 v, 24 v 10 a 12 v to 5 v 12 a 24 v to 5 v 12 a 24 v turn 19 v20v etc, application range is very wide