Description: Brand new and high quality Quantity: 1 pc Weight: 13 g Color: as the picture shows Size: 46mmx23mmx10mm/1.81"x0.91"x0.39"(inch) (approx.) Features: 1. Fixed current charging of the lamp to 0.1 times the constant current value (charge when used to identify if the battery is full); 2. Increased input reverse polarity protection diode; 3. Uses a dedicated reference IC and high-precision sampling resistor, making the constant current more stable (20 degrees to 100 degrees, constant current 1A, temperature drift less than 1%). Specially suitable for LED drivers * High-power LED constant current drive * Lithium battery charger (including ferroelectric) * 4V, 6V, 12V, 14V, 24V battery charger * Nickel-cadmium, nickel-metal hydride battery pack charger * Solar panels and wind turbines Specifications: * Module characteristics: non-isolated constant current and voltage module * Rectification: non-synchronous rectification * Input voltage: 7V-35V * Output voltage: 1.25V-30V * Output current: adjustable maximum 3A * Conversion efficiency: 92% (highest) * Switching frequency: 150KHz * Output ripple: 50mV (max) 20M bandwidth * Load regulation: 0.5% * Voltage regulation: 2.5% * Operating temperature: -40 to +85 Battery Usage: * Ensure you know the voltage and current of the battery you need to charge. * Adjust the constant voltage potentiometer to make the output voltage the same as the charging voltage. * Potentiometer adjustment direction: Clockwise (increase), counter-clockwise (decrease). * Use a multimeter on the 10A current scale to measure the output short-circuit current and adjust the current potentiometer to ensure the output current is the expected charging current value. * The charging current of the transfer lamp is standard 0.1 times the charging current (constant current value). * Connect to the battery and attempt to charge (for the previous 5 steps, the module's input terminal is connected to the power source, the output load is NOT connected to the batteries). LED Constant Current Driver Usage: * Ensure you know the operating current and Max operating voltage of the LED you need to drive. * Adjust the constant voltage potentiometer to ensure the output voltage is up to the LED's Max operating voltage. * Use a multimeter on the 10A current scale to measure the output short-circuit current and adjust the current potentiometer to ensure the output current is the expected LED operating current. * Connect the LED, test (For the above 3 steps, the module's input terminal is connected to the power source, the output load is NOT connected to the LED). Application Scope: Charging for lithium-ion batteries: when the lithium-ion battery voltage is low. If you use constant voltage charging directly, the excessive pressure can lead to battery damage. Therefore, start with constant current charging. When charging to a certain point, it will automatically switch back to constant voltage charging. Charging curve as shown below: red is current, blue is voltage. Driving power LED: Due to LED power level limitations, it's usually necessary to drive multiple LEDs to meet brightness demands. Therefore, a dedicated LED driver circuit is needed. This driving method uses constant current drive. Other occasions that require constant current output. Usage/Note: * This is an adjustable step-down voltage module. You can adjust the blue adjustable resistor on the module to change the output voltage. The input and output differential pressure is 2V. It can output a voltage as low as 1.23V. * The module indicates IN- (input negative), IN+ (input positive), OUT- (output negative), OUT+ (output positive). They must be connected correctly, otherwise, it may cause module damage. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1pc DC-DC LM2596 Step-down Adjustable Power Supply Module.