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5A CC/CV USB Voltmeter LED Drive Step Down Lithium Charger
Highlights : Contains the voltmeter£¬ ammeter£¬ power meter£¬ USB interface for charging the digital products. Note: 1.When you use the product£¬ the module inputs and outputs to be isolated from ground. 2.USB output voltage is consistent with the module£¬ not a fixed 5V output. When charging for digital equipment£¬ make sure USB output voltage is 5V. 3.Some customers report: “The module can not adjust the output voltage is always equal to the input voltage.” When you encounter this problem£¬ please counterclockwise rotation of the “voltage potentiometer” 10 laps or more£¬ then use the module you can adjust the output voltage. Because the factory default output voltage of about 20V. Specifications 1.Input voltage range:5-36VDC 2.Output voltage range:1.25-32VDC adjustable 3.Output current: 0-5A 4.Output power: 75W 5.High efficiency up to 96% 6.Built in thermal shutdown function 7.Built in current limit function 8.Built in output short protection function 9.Input reverse polarity protection: None (if required£¬ high current diode in series with the input). 10.L x W x H =68.2×38.8×15mm Application 1.Use as a step-down modules with overcurrent protection Usage: (1) Adjust the right button so that “OUT” LED lighted£¬ Digital meter shows the value of output voltage £¬adjust the “voltage potentiometer” so that the output voltage reaches the value you want. (2) Adjust the right button so that Digital meter shows the value of output current;Wire shorted output terminal£¬ then adjust the “current potentiometer” so that the output current reaches a predetermined overcurrent protection value. (For example£¬ the Digital meter displays the current value of 4A£¬ then you can use the module to a maximum current of 4A) (3) Connected to the load. 2.Use as a battery charger Usage: (1) Make sure you need to charge the battery float voltage and charging current; (if lithium parameters 3.7V/2200mAh£¬ then the float voltage is 4.2V£¬ the maximum charging current 1C£¬ ie 2200mA) (2)Under no-load conditions£¬ adjust the “Voltage potentiometer” so that the output voltage reaches the float voltage; (if to 3.7V rechargeable lithium battery£¬ the output voltage can be adjusted to 4.2V) (3)Adjust the right button so that Digital meter shows the value of output current;Wire shorted output terminal£¬ then adjust the “current potentiometer” so that the output current reaches a predetermined Charging current value. (4)Charge turn lamp current factory default is 0.1 times the charging current; (Battery during charging current is gradually reduced£¬ if the charge current setting is 1A£¬ then when the charge current is less than 0.1A£¬ blue lights turned off£¬ the green light is on£¬ which means that the battery is fully charged) (5)connected to the battery charge. (1£¬2£¬3£¬4 steps as: Output is unloaded£¬ do not connect the battery) 3.Use as a LED constant current driver module Usage: (1)Adjust the “voltage potentiometer” so that the output voltage reaches the value you want. (2)Adjust the right button so that Digital meter shows the value of output current;Wire shorted output terminal£¬ then adjust the “current potentiometer” so that the output current reaches a predetermined LED operating current. (3)Connect LED£¬ work. (1£¬2 steps as: Output is unloaded£¬ do not connect LED) Voltmeter and ammeter calibration method: Module with manual calibration function can correct display precision voltage and current£¬ if you think the current voltage and current accuracy to meet the requirements£¬ do not perform the following operations. (1) Output voltage calibration steps Step 1£¬ adjust the right button so that “OUT” LED lighted£¬ Digital meter shows the value of output voltage; Press the right button for more than 2 seconds£¬ release£¬ Digital meter and “OUT” LED flashes in synchronization so that you enter the output voltage calibration mode. Step 2£¬ press the right button (normal speed)£¬ the voltage value is adding up a unit; Press the left button£¬ minus a unit; Due to a unit is less than 0.1V£¬ the minimum voltage display to 0.1V£¬ so you need to continuously press 1-5 times to see the voltmeter change 0.1V£¬ how many times voltmeter change 0.1V by pressing the key£¬ depending on the current display voltage£¬ the higher the voltage£¬ the fewer the number of press. Step 3£¬ press the right button for more than 2 seconds£¬ release£¬ to exit the output voltage calibration mode. All parameters set to automatically power down to save. (2) Input voltage calibration steps Step 1£¬ adjust the right button so that “IN” LED lighted£¬ Digital meter shows the value of input voltage; press the right button for more than 2 seconds£¬ release£¬ Digital meter and “IN” LED flashes in synchronization so that you enter the input voltage calibration mode. Steps 2 and 3£¬ consistent with the output voltage calibration method. (3)Output current calibration steps Step 1£¬ adjust the right button so that Digital meter shows the value of output Current. Press the right button for more than 2 seconds£¬ release£¬ Digital meter flashes in synchronization so that you enter the output current calibration mode. Step 2£¬Connected to the load£¬ ammeter in series£¬ adjust the right and left button to change the display of digital meter£¬ so that is consistent with the ammeter display .