DC-DC CC CV Buck Converter Module 7-40V to 1.2-35V 8A 300W For LED Drive&Charging Description Do not want to wait? Click the following link to BUY IT NOW. http://www.ebay.com/itm/DC-DC-CC-CV-Buck-Converter-Step-down-Power-Module-7-40V-to-1-2-35V-8A-300W-/301206315890 Features: Use a dedicated benchmark IC, and high-precision current sensing resistor, make more stable constant current, (when 20℃ to 100℃ constant current 1A, temperature drift less than 1%). Particularly suitable for LED driver. Fixed turn lamp current is 0.1 times the current value (When charging, used to identify whether the battery is fully charged); High output current, the max output current can reach 9A. Low output ripple , high frequency capacitor reduces output ripple. Module parameters: Module Properties: non-isolated step-down module, constant current and constant voltage module (CC CV), charging module Input voltage: 7-40V Output voltage: 1.2-35V (continuously adjustable) Output Current: 8A, 9A the MAX ( power tube temperature exceeds 65℃ please add cooling fan ) Constant current range :0.2-8A ( adjustable ) Turn lamp current : constant current value * ( 0.1 ) , turn lamp current and constant current value linkage.For example, constant current value 3A, turn lamp current is set to 0.1 times constant current(0.1 * 3A = 0.3A). When adjust the constant current to 2A , then turn lamp current is 0.1 times constant current (0.1 * 2A = 0.2A). Turn lamp current is fixed to 0.1 time in this version( actually turn lamp current value is probably not very accurate ), it is for identify whether the battery is fully charged. Dropout voltage: 1V Output Power: Maximum power is about 300W, power tube temperature exceeds 65 degrees please add fan. Conversion efficiency : up to approximately 93% ( the higher output voltage, the higher the efficiency ) Output ripple : 20M bandwidth ( for reference only ) Input 24V Output 12V 5A ripple around 50mV ( excluding noise ) Operating temperature : Industrial grade (-40 ℃ to +85 ℃) No-load current : Typical 20mA (24V step down to 12V) Load regulation : ± 1% ( constant voltage) Voltage regulation : ± 1% Constant accuracy and temperature: the actual test , the module temperature changes from 25 degrees to 60 degrees , the change of the constant current value is less than 5% ( constant current value 5A) Dynamic response speed : 5% 200uS Potentiometer adjustment: clockwise ( increase ) , counterclockwise ( decrease ). The potentiometer close to the input port is for voltage adjust (CV), the potentiometer close to the output port is for current adjust(CC). Indicator : double color indicator. When charging the indicator is RED, fully charged is GREEN( No load is green ). Output short circuit protection : Yes , constant current ( constant current value you set) Input Reverse Polarity Protection: None, Output prevent backflow : None. Wiring: Terminal Applications: High-power LED constant current driver , Lithium battery(or Iron battery) charge, 6V, 12V, 14V, 24V battery charge , Nickel -cadmium nickel-metal hydride battery ( battery pack ) charge , Solar panels and wind turbines Battery charge: Make sure of the battery float voltage and charging current that you need, the input voltage of the module. Adjust the constant voltage potentiometer, adjust the output voltage to about 5V. Use the multimeter in 10A current scale to measure output short-circuit current,and adjust the current potentiometer to make sure the output current to the expected charging current value. Adjust the constant voltage potentiometer make the output voltage reaches the float voltage; Connected to the battery, try to charge. (1,2,3,4 steps to connect the power module input,output no-load does not connect battery.) LED constant current drive: Make sure operating current and Max operating Voltage of the LED you need to drive. Adjust the constant voltage potentiometer, adjust the output voltage to about 5V. Use the multimeter in 10A current scale to measure output short-circuit current, and adjust the current potentiometer to make sure the output current to the expected LED operating current. Adjust constant voltage potentiometer make the output voltage reach the maximum LED operating voltage. Connect LED, test. (1,2,3,4 steps to connect the power module input, output No-load does not connect LED.) Package included: 1 x DC buck converter module 8A Payment We only accept PayPal. Payment must be made within 7 calendar days of the auction end time. We reserve the right to cancel your order if the payment is not made within 7 calendar days of checkout. We will use your Ebay/Paypal shipping address as the delivery address. Please make sure to provide us with correct and detailed shipping address. To Russia, please the receiver name must write your full name as post office required. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility. Shipping Detail All the items to USA will ship via ePacket with tracking number. To UK and Australia the buyer can choose "Expedited Int'l Shipping", we also will ship via ePacket with tracking number, it is better than registered mail,usually delivery time is 7-20 business day. But to Australia ZIP code 2898/2899/6798/6799/7151 can NOT ship via ePacket. Other countries, total price below $30 we will ship your item without tracking number. Otherwise, if you need Registered Mail shipping, please add $2.5(Can choose "Standard Int'l Shipping",we will ship via registered mail). Usually all the items will be shipped via Hong Kong Post Airmail or China Post Airmail. If you need the other express way(EMS/DHL/FedEx/UPS),please contact with us for the correct price. Your order will be dispatched within 2 business days after the full payment is cleared. Airmail Packets' Delivery Time(reference only): USA,Australia,New Zealand,Southeast Asia, East Asia. 7-20 business days. Most European countries (France,Spain,Germany,UK,Sweden, Norway, Denmark,Netherlands,Austria,Portugal, Croatia, Finland, Switzerland, etc.) ,Canada,10-25 business days. Some remote city will take more than 25 business day. Italy,Russia, Brazil, Turkey, Ukraine, India, 14-35 business days, 90% take long time. Eastern Europe,West Asia,Central Asia, 15-30 business days,80% take long time. Africa,Chile,Argentina,Mexico,Other Countries. 15-40 business days,usually long time. Delivery time depends on postal process and other factors(Weather,Vacation,Customs,etc.),it can receive as fast as 7 days,but it can take as long as 4-7 weeks in some cases. If you do not get your item in reference delivery time, please contact us first through ebay message (Please do NOT open any case), we will reply you as soon as possible(within 24 business hours). Return Policy Please contact us before you leave Negative or Neutral Feedback if you are not satisfied with our products,we will resolve it asap. DOA(Dead On Arrival) or Wrong Item will be offered exchange. Refund will be offered if stock is not available Defective goods must be returned within 30 days after receiving it for exchange or refund. Buyer is responsible for return shipping cost in any situations. Contact us Please feel free to contact us from ebay if you have any questions , we will reply you within 48 hours except the weekends and public holidays. Please contact with us before you leaving Negative or Neutral feedback, and please DO NOT open any case, we will try my best to resolve your problems ASAP.
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