Specification:
Origin: Mainland China
Type: Voltage Regulator
Condition: New
Model Number: Step Down Converter
Features:
1. Fixed turn lamp current 0.1 times of the constant current value (used to identify whether the battery is full when charging);
2. the use of the reference IC, and high-precision sampling resistor, so that the constant current is more stable, (20 degrees to 60 degrees constant current when the temperature drift is less than 5%). Especially suitable for LED driver
3. large output current, is a large output current can be 12A, meet most of the needs.
4. 4 high-frequency capacitors, effectively reduce the output ripple, work stability
5. Double heat sink design, MOS tube Schottky two tubes independent heat sink, good heat dissipation, do not affect each other
6. spared no expense to use large size ferrosilicon aluminium magnetic ring, work efficiency, and with pure copper double line and spare, reduce heat, efficiency.
7. 3296 multi-turn potentiometer, voltage and current adjustment with high precision and good stability.
8. current sampling resistor current sampling precision and stability, temperature drift. LED .
9. dual-colour indicator, working status at a glance. Charging.
10. voltage and current are adjustable, do adjustable power supply effect is good, 12A current, power.
Module Parameters
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-metal hydride batteries (battery packs) charging, solar panels, wind generators
Input voltage: 7-32V
Output voltage: continuously adjustable (0.8-28V)
Output current: 12A (power tube temperature exceeds 65 degrees, please add a fan cooling, 24V to 12V 6A or less in the open environment generally can not add a fan)
Constant current range: 0.2-12A (adjustable)
Turn lamp current: constant current value * (0.1), turn lamp current and constant current value linkage, such as constant current value of 3A, turn lamp current is set to constant current 0.1 times (0.1 * 3A = 0.3A), when the constant current value is adjusted to 2A, this time the turn lamp current for the constant current of 0.1 times (0.1 * 2A = 0.2A).
The second version is fixed 0.1 times (the actual turn lamp current is the approximate value is not very) for charging whether full indication.
Is low voltage difference: 1V
Output power: is high power about 300W, power tube temperature over 65 degrees, please add a fan.
Conversion efficiency: is high about 95% (the higher the output voltage, the higher the efficiency)
Operating frequency: 300KHZ
Output ripple: 20M bandwidth (for reference only)
Input 24V output 12V ripple 50mV or so (excluding noise)
Operating temperature: industrial grade (-40 ° C to +85 ° C) (the actual use of the power tube temperature, the temperature is too high, please strengthen the 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: actual test, the module on the temperature change from 25 degrees to 60 degrees, constant current value change is less than 5% (constant current value)
Dynamic response speed: 5% 200uS
Direction of potentiometer adjustment: clockwise (increase), counterclockwise (decrease) The potentiometer close to the input is for voltage adjustment (CV), and the potentiometer close to the output is for current adjustment (CC).
Indicator light: two-colour indicator light, red during charging, green after charging (green without load), red without constant current.
Output short circuit protection: Yes
Input reverse connection protection: No
Output reverse current: no
Wiring: terminal
Product size: 65x45x20mm/2.56x1.77x0.79inch
Weight: 57g
Battery charging Method of use:
1. Determine the float voltage and charge current of the battery you need to charge, and the input voltage of the module;
2. Adjust the constant voltage potentiometer to adjust the output voltage to about 5V.
3. Measure the output short-circuit current with a multimeter 10A current stop, and adjust the constant current potentiometer to make the output current a predetermined charging current value.
4. Adjust the constant voltage potentiometer to make the output voltage float charging voltage;
5. Connect the battery, test charging.
(1, 2, 3, 4 steps for the module input connected to the power supply, the output no-load not connected to the battery.)
LED constant current driver Usage:
1. Determine the operating current you need to drive the LED and is a high operating voltage;
2. Adjust the constant voltage potentiometer to adjust the output voltage to about 5V.
3. Measure the output short-circuit current with a multimeter 10A current block, and adjust the constant current potentiometer to make the output current predetermined by the LED working current;
4. Adjust the constant voltage potentiometer so that the output voltage LED is high working voltage;
5. Connect the LED, test machine.
(1, 2, 3, 4 steps for the module input to the power supply, the output no-load not connected to the LEDs.)
Note:
Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!
Please allow 1-2cm measuring deviation due to manual measurement.
Package Content:1 x Adjustable Step Down Converter
