1pc New DC-DC 9A 300W Buck Converter 5-40V To 1.2-35V Step Down Power Module
$3.58
In stock
SKU
ea21007
(Spot: The maximum current is 8-9A, the maximum input voltage is 40V, and the output voltage is up to 35V)
(Because the 12A current chip manufacturer stopped production, the replacement chip current was reduced from the previous 12A to 8A current (the actual test maximum current is around 9A), the input voltage was increased from the previous 32V to 40V, and the output voltage was increased from the previous 28V to 35V. Powering 10 strings of high power LEDs.)
QS-2405CCBD-12A power module
Size: 65 (length) * 47 (width) * 23.5 (height) mm
typical application:
Adjustable power supply (12A power is large enough), high power LED driver, LED display driver, lead battery charging, lithium battery charging, car power supply, car laptop power supply (buck), regulated power supply, low voltage system power supply, (such as children Toy car with 12V battery step down to 6V), 24V to 12V 12A \\\\12V to 5V 12A \\\\24V to 5V 12A \\\\24V to 19V20V, etc., a wide range of applications.
1. The fixed lamp current is 0.1 times of the constant current value (used to identify whether the battery is full when charging);
2. A dedicated reference IC and a high-precision sampling resistor are used to make the constant current more stable (50 degrees to 60 degrees constant current 5A when the temperature is less than 5%). Particularly suitable for LED drivers
3. The output current is large, and the maximum output current can reach 12A, which meets most needs.
4.4 high frequency capacitors to effectively reduce output ripple and improve operational stability
5. Double heat sink design, MOS tube Schottky diode independent heat sink, good heat dissipation, mutual influence
6. At the cost, the large-size iron-silicon-aluminum magnetic ring is used to improve the working efficiency, and the pure copper double wire is used to reduce heat and improve efficiency.
7. 3296 multi-turn potentiometer, high voltage and current regulation accuracy, good stability.
8. Dedicated current sampling resistor The current sampling precision is high, the stability is good, and the temperature is small. LED is a must.
9. Two-color indicator light, the working status is clear at a glance. Rechargeable.
10. The voltage and current are all adjustable, and the adjustable power supply is good. The 12A current is large and the power is sufficient.
Module parameter
Module nature: non-isolated buck 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-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 (arbitrarily selected between 0.8-28V), please tell the shopkeeper when purchasing. (For the time being only for bulk customers, all samples are adjustable)
Output current: up to 12A (power tube temperature exceeds 65 degrees, please add fan cooling, 24V to 12V 6A or less, empty environment can generally be without fan)
Constant current range: 0.2-12A (adjustable) (no such function without constant current)
Turning lamp current: constant current value * (0.1), the lamp current is linked with the constant current value, for example, the constant current value is 3A, and the lamp current is set to 0.1 times of the constant current (0.1*3A=0.3A). When the current value is adjusted to 2A, the lamp current is 0.1 times of the constant current (0.1*2A=0.2A).
The minor version is fixed at 0.1 times (the actual lamp current is approximate or not very accurate).
The lowest voltage difference: 1V
Output power: The maximum power is about 300W. If the power tube temperature 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 (no noise)
Operating temperature: Industrial grade (-40 ° C to +85 ° C) (Please pay attention to the power tube temperature for actual use, please strengthen the heat when the temperature is too high)
No-load current: typical 20mA (24V to 12V)
Load adjustment rate: ±1% (constant voltage)
Voltage regulation rate: ±1%
Constant current accuracy and temperature: In 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 regulation (CV), near the output potentiometer for current regulation (CC)
Indicator light: Two-color indicator light, the indicator light is red during charging, the charging completion indicator is green (no load is green) The indicator without constant current is red.
Output short circuit protection: Yes, constant current (current constant current value is set)
Input reverse connection protection: none,
Output prevents backflow: none.
Wiring method: terminal block
Battery charging How to use:
1. Determine the float voltage and charge current of the rechargeable battery you need, the input voltage of the module;
2. Adjust the constant voltage positioner and adjust the output voltage to about 5V.
3. Use the multimeter 10A current block to measure the output short-circuit current, and adjust the constant current potentiometer to make the output current reach the predetermined charging current value;
4. Adjust the constant voltage position device to make the output voltage reach the float voltage;
5. Connect the battery and try to charge.
(1, 2, 3, 4 steps are connected to the power supply of the module, and the output is not connected to the battery.)
LED constant current drive How to use:
1. Determine the operating current and maximum operating voltage at which you need to drive the LEDs;
2. Adjust the constant voltage positioner and adjust the output voltage to about 5V.
3. Use the multimeter 10A current block to measure the output short-circuit current, and adjust the constant current potentiometer to make the output current reach the predetermined LED operating current;
4. Adjust the constant voltage position device to make the output voltage reach the maximum working voltage of the LED;
5. Connect the LED and test the machine.
(1, 2, 3, 4 steps are connected to the power supply of the module, and the output is not connected to the LED light.)
1pcs（90 days after receipt of order）
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