DC-DC 9A 300W DC Buck Converter 5-40V to 1.2-35V Power Module 12A BuckItem NO.: DC300W

DC-DC 9A 300W DC Buck Converter

Kind reminder:

(In stock: The maximum current is 8-9A, the highest input voltage is 40V, and the highest output voltage is around 35V)

Due to the discontinuation of the 12A current chip manufacturer, the replacement chip current has been reduced from the previous 12A to 8A (the actual maximum tested current is around 9A), the input voltage has been increased from 32V to 40V, and the output voltage has been increased from 28V to 35V. It can supply power to 10 high-power LED strings. The 12A chip will be notified separately upon arrival

Typical applications:

Adjustable power supply (12A power is sufficient), high-power LED driver, LED display screen driver, lead-acid battery charging, lithium battery charging, car power supply, car laptop power supply (step-down), stabilized power supply, low-voltage system power supply (such as reducing the voltage of 12V battery for children's toy cars to 6V), 24V to 12V 12A \ \ 12V to 5V 12A \ \ 24V to 5V 12A \ \ 24V to 19V20V, and so on, with a wide range of applications.

Module features:

1. The fixed turn signal current is 0.1 times the constant current value (used to identify whether the battery is fully charged during charging);

2. A dedicated reference IC and high-precision sampling resistor are used to make the constant current more stable (with a temperature drift of less than 5% when the constant current is 5A from 20 degrees to 60 degrees). Especially suitable for LED drivers

3. The output current is large, and the maximum output current can reach 12A, meeting most needs.

4. 4 high-frequency capacitors effectively reduce output ripple and improve working stability

5. Dual heat sink design, MOSFET Schottky diode independent heat sink, good heat dissipation, without affecting each other

6. Adopt large-sized iron silicon aluminum magnetic rings at all costs to improve work efficiency, and use pure copper double wires to reduce heat generation and improve efficiency.

7. 3296 multi turn potentiometer with high voltage and current regulation accuracy and good stability.

8. The dedicated current sampling resistor has high sampling accuracy, good stability, and small temperature drift. LED essential.

9. Dual color indicator light, clear working status at a glance. Charging is essential.

10. The voltage and current can be adjusted, making it an effective adjustable power supply. The 12A current is high and the power is sufficient.

Module parameters:

Module nature: Non isolated step-down constant current and constant voltage module (CC CV) charging module

Scope of application: high-power LED constant current drive, lithium battery charging (including ferroelectricity), 4V, 6V, 12V, 14V, 24V battery charging, nickel cadmium nickel hydrogen battery (battery pack) charging, solar panels, wind turbines

Input voltage: 7-32V (without constant current 5-32V)

Output voltage: (1) Continuously adjustable (0.8-28V) (2) Fixed output (any choice between 0.8-28V), please inform the shopkeeper when purchasing. (For bulk customers only, all samples will be sent in adjustable versions) (3) If you need a higher voltage, please contact me directly

Output current: Maximum 12A (If the temperature of the power tube exceeds 65 degrees, please add a fan for heat dissipation. For open environments within 6A from 24V to 12V, a fan is generally not required)

Constant current range: 0.2-12A (adjustable) (not available for devices without constant current)

Rotating lamp current: constant current value * (0.1), the rotating lamp current is linked to the constant current value. For example, if the constant current value is 3A, the rotating lamp current is set to 0.1 times the constant current (0.1 * 3A=0.3A). When the constant current value is adjusted to 2A, the rotating lamp current is 0.1 times the constant current (0.1 * 2A=0.2A)

The second version is a fixed 0.1 times (the actual light current is not very accurate) for indicating whether the charging is fully charged.

Minimum pressure difference: 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: 300KHZ

Output ripple: 20M bandwidth (for reference only)

Input 24V output 12V 5A ripple around 50mV (excluding noise)

Working temperature: Industrial grade (-40 ℃ to+85 ℃) (Please pay attention to the temperature of the power tube during actual use. If the temperature is too high, please strengthen heat dissipation)

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

Load adjustment rate: ± 1% (constant voltage)

Voltage adjustment rate: ± 1%

Constant current accuracy and temperature: In actual testing, the temperature on the module changed from 25 degrees to 60 degrees, and the change in constant current value was less than 5% (constant current value 5A)

Dynamic response speed: 5% 200uS

Direction of potentiometer adjustment: clockwise (increase), counterclockwise (decrease). The potentiometer near the input is voltage regulation (CV), and the potentiometer near the output is current regulation (CC)

Indicator light: Dual color indicator light, red indicator light during charging, green indicator light after charging (green when not connected to load), red indicator light without constant current.

Output short-circuit protection: Yes, constant current (currently set constant current value)

Input reverse protection: none,

Output to prevent backflow: None.

Wiring method: Wiring terminals

Battery charging usage method:

1. Determine the float voltage and charging current of the battery you need to charge, as well as the input voltage of the module;

2. Adjust the constant voltage potentiometer to adjust the output voltage to around 5V.

3. Use a multimeter to measure the output short-circuit current in the 10A current range, and adjust the constant current potentiometer to reach the predetermined charging current value;

4. Adjust the constant voltage potentiometer to achieve a float voltage output voltage;

5. Connect the battery and try charging.

(Steps 1, 2, 3, and 4 are to connect the module input to the power supply and output to no load without connecting to the battery.)

Usage of LED constant current drive:

1. Determine the working current and maximum working voltage that you need to drive the LED;

2. Adjust the constant voltage potentiometer to adjust the output voltage to around 5V.

3. Use a multimeter to measure the output short-circuit current in the 10A current range, and adjust the constant current potentiometer to reach the predetermined LED working current;

4. Adjust the constant voltage potentiometer to reach the maximum operating voltage of the LED;

5. Connect the LED and test the machine.

(Steps 1, 2, 3, and 4 are to connect the module input to the power supply and output to no load without LED lights.)