Description
0.8-30V 0.1-5A Variable DC Constant Voltage Constant Current Buck Regulator with PWM DC DC Isolated Buck Converter
Product Description
The newly upgraded 5A step-down constant voltage and constant current module can charge storage batteries, lithium batteries, etc., with turning light control to facilitate observation of the charging status. It can be used as a high-power LED drive module with a PWM control input interface and a switch control interface, which is convenient for using a single-chip microcomputer to control the drive current. The new upgrade and correction of the constant current adjustment circuit make the entire current adjustment process very stable. Let the module work with high current for a long time, the temperature is lower and more stable. TVS_ pole tube is added to the input to make the module more stable. Two 470μF/35V switching power supply dedicated high frequency low resistance capacitors, so that the output ripple is lower, 13mm large magnetic ring 0.7mm all copper enameled wire. The onboard constant current/charging/full LED working indicator light is more intuitive when working. The reserved PWM input and switch control interface can be used to control the output by a switch or single-chip microcomputer and adjust the current through PWM. Four 3mm screw holes are convenient for your installation.
Application
1. DIY a regulated power supply with constant current function, which is not afraid of short circuit during use, which can protect the load; 2. Power your electronic equipment; 3. Charge various batteries, set the charging voltage and charging current according to the batteries of different voltages and capacities, with charging indicator function, convenient to observe the charging status; 4. Use solar panels to supply power to charge various batteries, with constant current function, which can prevent the battery from overcharging and effectively protect the battery; 5. Drive high-power LEDs, which can be freely combined in series and parallel, with PWM control input, and can be controlled by single-chip microcomputer. ED brightness (PWM control frequency range 100Hz~300Hz); 6. As a vehicle power supply, it can supply power to your mobile phone or various digital products.
Specification
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Module nature
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non-isolated step-down module (BUCK)
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Input voltage
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4.5V~30V
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Output voltage
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0.8V~30V continuously adjustable, 0.8V~30V fixed output default delivery is adjustable output
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Output constant current range
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0.1A~5A (default output constant current is 3A)
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Output turn light range
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0.1A~5A (default turn light current is 0.3A) The current range will have a little error due to the difference of part parameters
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Working temperature
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-40°C~+85°C
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Working frequency
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3000KHz
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Output Current
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0.1-5A
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Output Frequency
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3000KHz
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PWM control frequency range
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100Hz~ 300Hz
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Conversion efficiency
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95% higher (efficiency is related to input, output voltage, current, and voltage difference)
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Short circuit protection: Yes (the current limit is the set constant current value) Over temperature protection: Yes (automatically shut down the output after over temperature) Input reverse connection protection: None (if necessary, please put a diode in the input) Output anti-backfill protection: None (if you hesitate about the position of the anti-backfill diode, you can add it yourself if you need it. The method is described below) Charging instructions: red light when charging, green light when fully charged. Turning lamp detection method is current Installation method: 4 3mm screws Wiring mode: terminal (welding wire output when equipped with shell) V-IN is input, V_OUT is output Module size: 60mm*25mm The current detection of the module is low-end detection, please do not short-circuit the negative pole of the input and the negative pole of the output directly with wires!
Installation Instructions
1. Set the output voltage: According to the float voltage value of the battery you want to charge, or the voltage value of the LED after series or parallel connection, adjust the constant voltage potentiometer (CV), and set the output voltage to the required voltage (not Under load); 2. Set the lamp current indication: After setting the output voltage, adjust the CC potentiometer counterclockwise about 20 turns, use a multimeter to short-circuit the output at 20A current, adjust the CC potentiometer to the current you need to turn the lamp, and then adjust the rotation The light potentiometer (LED), adjust to just the green light; 3. Set the constant current value: After adjusting the lamp current, the 20A current range of the multimeter is still short-circuited, and the output of the CC potentiometer is adjusted to the current value you need to set. Note: When setting the constant current, the voltage must be higher than 0.8V, otherwise the constant current function will be invalid.
Details Images