D252:DC_DC step-down 10A

Module parameters

Module nature: non-synchronous rectifier non-isolated constant current constant voltage module CC CV charging module

Application: High-power LED constant current driver, lithium battery charging (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, NiCd NiMH battery (battery pack) charging, solar panels,

Input voltage: 7-40V

Output voltage: continuously adjustable (1.25-35V) (for applications where the input voltage is higher than the output voltage can not boost)

Output current: 10A long time 8A (power tube temperature exceeds 65 degrees Please add the fan heat, 24V to 12V 5A within the normal temperature can be used without fan)

Constant current range: 0.3-10A (regulation) module more than 65 degrees please add the fan.

Rotating lamp current: Constant current value * (0.1), Turn lamp current and constant current value linkage, such as constant current value is 3A, Turn current setting is 0.1 times of constant current (0.1 * 3A = 0.3A) When the flow value is adjusted to 2A, the turn-on current is 0.1 times of the constant current (0.1 * 2A = 0.2A).

 The minor version is a fixed 0.1x (the actual turnaround current is probably not very accurate) for full charge indication.

Low dropout: 1V

Conversion efficiency :. About 95% high (the higher the output voltage, the higher the efficiency)

Working frequency: 300KHZ

Output ripple: ripple about 50mV (without noise) 20M bandwidth (for reference only) Input 24V Output 12V 5A Measured

Operating temperature: Industrial (-40 ℃ to +85 ℃) (Please note the actual use of the power tube temperature, high temperature, please strengthen the heat)

No-load current: 20mA typical (24V to 12V)

Load regulation: ± 1% (constant voltage)

Voltage regulation rate: ± 1%

Constant current accuracy and temperature: the actual test, the module temperature changes from 25 degrees to 60 degrees, the constant current value changes less than 5% (constant current value 5A)

Dynamic response speed: 5% 200uS

Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease) 

Indicator: Two-color indicator, charging indicator light red, charging indicator light green (empty for green) 

Output short circuit protection: Yes, constant current (current setting constant current value)

Input reverse protection: None,

Output anti-anti-perfusion: no, for rechargeable batteries need to add 2 pole tube!

Wiring: Terminal

Module Size: 65 * 47 * 23.5MM

Battery charging method:
1. Make sure you need the float voltage and charging current of the rechargeable battery, the module's input voltage;

2. Adjust the constant voltage potentiometer, the output voltage is adjusted to about 5V.

3. With multimeter 10A current block output short-circuit current measurement, while adjusting the constant current potentiometer so that the output current reaches a predetermined charge current value;

4. Adjust the constant voltage potentiometer so that the output voltage reaches the float voltage;

5. Connect the battery, try charging.

(1, 2, 3, 4 steps for the module input power, the output does not load the battery.)

LED constant current driver to use:

1. Make sure that you need to drive LED operating current and high operating voltage;

2. Adjust the constant voltage potentiometer, the output voltage is adjusted to about 5V.

3. With multimeter 10A current block output short-circuit current measurement, while adjusting the constant current potentiometer so that the output current reaches the predetermined LED operating current;

4. Adjust the constant voltage potentiometer so that the output voltage reaches LED. High operating voltage;

5. Connect the LED, test machine.

(1, 2, 3, 4 steps for the module input power, the output does not load the LED lights.) 

Application:

Adjustable power supply (10A high power), high-power LED driver, LED display driver, lead battery charging, lithium battery charging, car power supply, automotive notebook power supply (step-down), regulated power supply, low voltage system power supply 12V battery car down to 6V), 24V to 12V 10A \ 12V to 5V 12A \ 24V to 5V 12A \ 24V to 19V20V, etc., the scope of application is very wide.