DC-DC 20A 300W ADJUSTABLE STEP DOWN CONSTANT CURRENT LED DRIVER POWER SUPPLY USER GUIDE
MAIN FEATURES
- Constant voltage and constant current output continuously adjustable
- 6-40V wide voltage input
- Output ripple: about 50mV ripple (no noise) 20M bandwidth (For reference only).
- Synchronous rectification 97% high efficiency
- Non-isolated buck converter
- CCCV charging module
- Two 85V 80A high current MOS tubes
- Using 2 aluminum heatsinks and 0.8MM pure copper wires for coil winding
- Working frequency: 150KHZ
- Conversion efficiency: The maximum efficiency is about 96%, which is related to
the voltage difference and the use environment - Wiring method: terminal block
| Product Specifications | |
|---|---|
| Input Voltage | 6V to 40V DC (10V to 40V is suggested |
| Output Voltage | 1.2V to 36V DC (less than 32V suggested) |
| Output Current | 20A (max), 15A (suggested) |
| Efficiency | 95% (24V to 12V, 20A) |
| Output Ripple | <=50mV |
| Wiring Method | Terminal Screws |
| Short Circuit Protect | Self Recovery (cannot short circuit for a long time.) |
| Dimensions | 60 x 53 x 27mm |
LIMITATIONS
- Output voltage is continuously adjustable (1.2-35VDC) (But it is suggested to use below 32V for a longer time)
- Applicable to applications where the input voltage is higher than the output voltage and this module cannot become a boost converter.
- Output current: limited to 20A, for a longer time period it is within 15A (If the temperature of the power tube exceeds 65 degrees please add a fan to dissipate heat, and use derating for high voltage output.
- Current limiting range: 0.2-20A (adjustment) If the module exceeds 65
degrees, please add a fan. - Low Voltage dropout limit: 3V
- Operating temperature: -10°C to +75°C (In actual use, please pay attention to the temperature of the power tube, if the temperature is too high, please strengthen the heat dissipation or derate the use)
- Output short-circuit protection: yes (instantaneous protection) constant current (however, the current set constant current value cannot be short-circuited for a long time)
- Input reverse polarity protection: none
- Output anti-backflow: none
- For self-charged or inductive loads, additional 2-pole diodes are required
PRODUCT APPLICATIONS
- High-power LED constant current drive
- Lithium battery charging (including ferroelectric)
- 4V, 6V, 12V, 14V, 24V battery charging
- NiCd NiMH battery (battery pack) charging
- Solar panels
- Wind turbines
PRODUCT IMAGES
HOW TO USE THIS DEVICE
- Adjust the CV potentiometer and set the output voltage to the voltage value you need according to your load requirements (Adjust the CC potentiometer so that it’s not on the lowest minimum setting at this point)
- Set the CC potentiometer counterclockwise for about 30 turns (that is, set the output current to the minimum value).
For Constant Current LED
- Connect the LED and adjust the CC potentiometer to the current you need.
For Battery Charging
- For battery charging, after the battery is fully discharged, connect to the output and adjust the CC to the current you need.
- The longer you charge your battery in Constant Current mode (CC), the lesser the charging current will be until it is insignificant.
- At this point, your battery should be fully charged.