2021 DC-DC CC CV Buck Converter Step-down Power Module 7-40V to 1.2V-35V 8A 300W

Description

Description:
Module nature: non-isolated step-down constant current, constant voltage module (CC CV) charging module
Scope of application: high-power LED constant current drive, lithium battery charging (including ferroelectric), 4V, 6V, 12V, 14V, 24V battery charging, nickel-cadmium-nickel-metal hydride battery (battery pack) charging, solar panel, wind generator.
Input voltage: 7-40V
Output voltage: 1.2-35V (continuously adjustable)
Output current: Max. 8A (please add a fan to cool the power tube if the temperature exceeds 65 ° C, within 24V to 12V and 6A, you can generally leave the fan in an open environment)
Constant current range: 0.2-8A (adjustable)
Turn current: constant current value * (0.1), the turn current and constant current value are linked, for example, the constant current value is 3A, the turn current is set to 0.1 times the constant current (0.1 * 3A = 0.3A). When the current value is adjusted to 2A, the current of the turn lamp is 0.1 times of the constant current (0.1 * 2A = 0.2A).
This version is fixed at 0.1 times (the actual turn lamp current is approximate and not very accurate). It is used to indicate whether the battery is fully charged.
Lowest dropout: 1V
Output power: The maximum power is about 300W. If the temperature of the power tube exceeds 65 degrees, please add a fan.
Conversion efficiency: up to about 95% (the higher the output voltage, the higher the efficiency)
Working frequency: 180KHZ
Output ripple: 20M bandwidth (for reference only)
Input 24V output 12V 5A ripple about 50mV (excluding noise) (please pay attention to the temperature of the power tube in actual use, please strengthen heat dissipation if the temperature is too high)
No-load current: 20mA typical (24V to 12V)
Load adjustment rate: ± 1% (constant voltage)
Voltage adjustment rate: ± 1%
Constant current accuracy and temperature: The actual test, the temperature on the module changes from 25 degrees to 60 degrees, and the constant current value changes less than 5% (constant current value 5A)
Dynamic response speed: 5% 200uS
Potentiometer adjustment direction: clockwise (increase), counterclockwise (decrease) Close to the input potentiometer for voltage adjustment (CV), and close to the output potentiometer for current adjustment (CC)
Indicators: two-color indicator, red indicator during charging, green indicator after charging (green without load), indicator without constant current is red.
Output short circuit protection: Yes, constant current (current value of constant current setting)
Input reverse connection protection: None.
Output prevents backflow: None.
Wiring method: terminal
Size: 65 (length) * 47 (width) * 23.5 (height) mm
Weight: 20G Application:
Adjustable power supply, high-power LED driver, LED display driver, lead-acid battery charging, lithium battery charging, car power supply, car notebook power supply (step-down), regulated power supply, low-voltage system power supply, (eg 12V battery for children's toy cars Pressure to 6V), 24V to 12V 12V to 5V24V to 5V24V to 19V 20V and so on.
Battery charging method:
1. Determine the floating voltage and charging current of the battery you need to charge, and the input voltage of the module;
2. Adjust the constant voltage positioner to adjust the output voltage to about 5V.
3. Measure the output short-circuit current with the multimeter 10A current block, and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;
4. Adjust the constant voltage positioner to make the output voltage reach the floating charge voltage;
5. Connect the battery and try charging.
(Steps 1, 2, 3, and 4 connect the module input to the power supply, and the output is not connected to the battery.)
LED constant current drive
1. Determine the working current and maximum working voltage you need to drive the LED;
2. Adjust the constant voltage positioner to adjust the output voltage to about 5V.
3. Use a multimeter 10A current block to measure the output short-circuit current, and at the same time adjust the constant current potentiometer to make the output current reach the predetermined LED working current;
4. Adjust the constant voltage positioner so that the output voltage reaches the maximum LED operating voltage;
5. Connect the LED and test the machine.
(Steps 1, 2, 3, and 4 connect the module input to the power supply, and the output is not connected to the LED light.)
Type:Power Module
Package Included:
1 x Power Module
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