Dc-dc Step-down Module 5a Constant Voltage/current Charger Power 4-38v 75w New

US $8.71

suzhou, China
Jul 6th

Open on mobile:
QR code

Product Description DC-DC Step-Down Module 5A Constant Voltage/Current Charger Power 4-38V 75W NEW Features: 5A DC-DC Constant Current for LED Driver Lithium-ion Battery Power Supply Module Step-down Type Use as an ordinary module with overcurrent protection Used as a charger for lithium battery, nickel-cadmium nickel-metal hydride battery (battery pack) Use as a high-power LED constant current driver module Two modes: constant voltage and constant current, indicator display When used as a lithium battery charger, you can set the float voltage and the charging current. High power, high efficiency, low ripple, current limit protection Specifications: Input voltage: 4-38V Output voltage: 1.25-36V (continuously adjustable) Output current: Max. 5A (adjustable) Output power: Max. 75W Working temperature: -40degree Celsius~+85degree Celsius Operating frequency: 180KHz Conversion efficiency: up to 96% Short circuit protection: Yes (limited current 8A) Over-temperature protection: Yes (automatic shutdown output if over-temperature) Reverse input protection: No Installation method: 4 *3mm screws Wiring: terminal or soldering terminal, V-IN is input, V-OUT is output Module dimension: approx. 51.2mm *26.2mm *15mm Instructions: 1. Use as an ordinary module with over current protection (1) Adjust the constant voltage leveler so that the output voltage reaches your desired voltage level. (2) Measure the output short-circuit current with the 10A current meter of the multi-meter (directly connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the predetermined over-current protection value. (For example, the current value displayed by the multimeter is 4A, then when you use the module, the maximum current can only reach 4A. When the current reaches 4A, the red constant voltage constant current indicator is on, otherwise the indicator is off). Note: If used in this way, there will be a voltage drop of 0~0.3V after the load is connected because the output has a 0.05 current sampling resistor. This is a normal phenomenon! The voltage drop is not pulled down by your load but drops to the sampling resistor. 2. Use as a battery charger The module without constant current function can not be used to charge the battery. Because the voltage difference between the battery and the charger that consumes electricity is very large, the charging current is too large and the battery is damaged. Therefore, the battery must be used at the beginning. Stream charging, automatically switches back to constant voltage charging when charging to a certain degree. Usage: (1) Make sure you need the float charge voltage and charge current of the rechargeable battery; (if the lithium battery parameter is 3.7V/2200mAh, then the float voltage is 4.2V, the maximum charge current is 1C, ie 2200mA) (2) Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage leveler so that the output voltage reaches the float voltage; (If the 3.7V lithium battery is charged, adjust the output voltage to 4.2V) (3) Measure the output short-circuit current with the multimeter 10A current range (directly connect the two test leads to the output terminal), and adjust the constant current potentiometer to make the output current reach the preset charging current value; (4) The charge turn lamp curent factory default is 0.1 times the charge current; (battery in the charging process, the current is gradually reduced, and gradually from constant current charging to constant voltage charging, if the charging current is set to 1A, then When the charge current is less than 0.1A, the blue light is off and the green light is on. At this point, the battery is fully charged.) (5) Connect the battery and charge it. (Steps 1, 2, 3, and 4: Input is connected to the power supply, output is not connected to the battery) 3. Use as high-power LED constant current drive module 1) Make sure that you need to drive the LED's operating current and maximum operating voltage; 2) Under no-load conditions, the multimeter measures the output voltage and adjusts the constant voltage leveler so that the output voltage reaches the maximum LED operating voltage; 3) Measure the output short-circuit current with the 10A current meter of the multimeter, and adjust the constant-current potentiometer at the same time to make the output current reach the predetermined LED operating current; 4) Connect the LED, test machine. (Steps 1, 2, and 3 are: input power supply, output no-load LED light.) ATTENTION: When this module is used in excess of 3A and 35W, please enhance heat dissipation! Package contents: 1 * Module Note: The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Payment We accept payment via Paypal only. Payment must be completed within 5 days. If you have any problems about payment, please contact us via ebay message. Delivery details We only ship to confirmed Paypal addresses. Please comfirm that your paypal address is in line with your shipping address. Please kindly note that the combined shipping is not provided because the shipping fee is calculated by weight. Also, the each additional item means exactly the the same color and size. It takes about 7-15 working days to US; about 10-30 working days to other countries. Transit time may be a little delayed because of the bad weather and customs inspection. If you do not receive your item within 30 working days since payment finished, please contact us immediately for further assistance. Contact us We strive for 100% customer satisfaction! Positive Feedback is very important to us. If you have any questions, please feel free to contact us via "Ask seller a question" . We will reply your email within 24 working hours.

Condition:	New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. ...	Brand	Unbranded
Output current:	Max. 5A (adjustable)
MPN	Does Not Apply
Output power:	Max. 75W
Input voltage:	4-38V
Operating frequency:	180KHz
Output voltage:	1.25-36V (continuously adjustable)
Package Contents	1 * Module
UPC	Does not apply