HW-514 5A digitális kijelző állandó áram állandó feszültség lelépés DC-DC LED lítium akkumulátor töltő modul USB bak
HW-514 5A Digital Display Constant Current Constant Voltage Step Down Board DC-DC LED Lithum Battery Charger Module USB Buck
1. Onboard voltage, current, power meter, you can easily use this module without a multimeter, which is more convenient and intuitive.
2. The onboard USB interface can easily charge your digital products. (Note: The USB output voltage is the same as the module output voltage, not a fixed 5V output, please confirm before charging the USB device)
3. High power, high efficiency, 5A, low ripple;
4. Three major functions:
(1) Use as an ordinary step-down module with over-current protection capability;
(2) Used as a charger for various voltage values of lithium batteries, batteries, nickel-cadmium nickel-metal hydride batteries (battery packs), used in solar panels, wind generators and other occasions;
(3) Use as a high-power LED constant current drive module;
5. With two modes of constant voltage and constant current, there are indicators to indicate which mode the module is currently in;
6. When used as a lithium battery charger, the float voltage and charging current can be set, and an indicator light indicates
Indicates whether it is charging or fully charged;
7. With current-limiting protection function, the module will not be burnt out even if the output is short-circuited.
8. The onboard voltage and ammeter can be self-calibrated, and there will never be inaccurate problems!
9. With heat sink, free copper pillar!
Module parameters
Input voltage: 5-36V
Output voltage: 1.25-32V continuously adjustable
Output current: adjustable, maximum 5A (recommended to use within 4.5A)
Output power: maximum 75W (recommended to use within 50W, please reduce the power when using large pressure difference)
Working temperature: -40~ 85 degrees
Working frequency: 180KHz
Conversion efficiency: up to 96%
Short circuit protection: Yes
Over-temperature protection: Yes (automatically shut down the output after over-temperature)
Input reverse connection protection: None, (if necessary, please insert a high-current diode in series in the input)
Installation method: 4 3mm screws
Wiring mode: wiring terminal or welding terminal, V-IN is input, V-OUT is output
Module size: length 68.2mm width 38.8mm height 15mm
Weight: 39g
Scope of application
1. Use as an ordinary step-down module with over-current protection capability
Instructions:
(1) Press the button on the right to adjust the digital meter to the [Display output voltage] interface, and adjust the "constant voltage potentiometer" to make the output voltage reach the voltage value you want;
(2) Adjust the digital meter to the [Display output current] interface, and directly short-circuit the output terminal of the module (just find a thick wire to short-circuit the output terminal), at this time adjust the "constant current potentiometer" to make the The current value reaches the preset overcurrent protection value; (for example, the current value displayed by the on-board ammeter is 4A, then the maximum current of the module is limited to 4A, and the red indicator light is on when the current reaches 4A)
(3) Connect the load and work.
2. Use as a battery charger
The module without the constant current function cannot be used to charge the battery. Because the voltage difference between the exhausted battery and the charger is large, the charging current is too large and the battery is damaged. Therefore, the battery must be constant at the beginning. Current charging, when the charging reaches a certain level, it will automatically switch back to constant voltage charging.
Instructions:
(1) Determine the floating voltage and charging current of the battery; (If the lithium battery parameter is 3.7V/2200mAh, then the floating voltage is 4.2V, and the maximum charging current is 1C, which is 2200mA)
(2) Under no-load conditions, adjust the digital meter of the module to the [Display output voltage] interface, and adjust the "constant voltage potentiometer" to make the output voltage reach the float voltage;
(3) Adjust the digital meter to the [Display output current] interface, and directly short-circuit the output terminal of the module (just find a thick wire to short-circuit the output terminal), at this time adjust the "constant current potentiometer" to make the The current value reaches the preset charging current value;
(4) The default charging current of the rechargeable lamp is 0.1 times the charging current; (The current of the battery is gradually reduced during the charging process, and gradually changes from constant current charging to constant voltage charging. If the charging current is set to 1A, then when the charging current is set to 1A, When the charging current is less than 0.1A, the blue light is off and the green light is on, and the battery is fully charged at this time)
(5) Connect the battery and charge it.
(Steps 1, 2, 3, 4 are: the input terminal is connected to the power supply, and the output terminal is not connected to the battery without load)
3. Use as LED constant current drive module
(1) Determine the operating current and maximum operating voltage you need to drive the LED;
(2) Under no-load conditions, adjust the digital meter to the [Display output voltage] interface, and adjust the "constant voltage potentiometer" to make the output voltage reach the LED operating voltage;
(3) Adjust the digital meter to the [Display output current] interface, and directly short-circuit the output terminal of the module (just find a thick wire to short-circuit the output terminal), at this time adjust the "constant current potentiometer" to make the The current value reaches the preset LED working current;

(4) Connect the LED and test the machine.
(Steps 1, 2, and 3 are: the input is connected to the power supply, and the output is no-load without the LED light)
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