DC-DC 12V to 5V step-down module USB port with adjustable voltage and current 3A/5A constant current with display

Module highlights

The 1 onboard the voltage， current， power meter， you do not have a multimeter can easily use the module， more convenient， more intuitive.

2 onboard USB interface， can be easy to your digital products charge. (Note: the output voltage of the USB agreement， and the output voltage is not fixed 5V output module， charging of USB devices before you confirm to 5V， or else it may damage your equipment)

3 large power， high efficiency， 5A， low ripple;

4 the three functions:

(1) as with ordinary reducing module flow protection ability to use;

(2) as a variety of voltage of lithium battery， storage battery， NiCd and NiMH batteries (battery) charger use， used for solar panels， wind turbines and other occasions;

(3) as the high-power LED constant current driving module using;

5 with constant voltage and constant current two modes， there are indicator light module currently in which mode;

6 as the lithium battery charger when in use， you can set the floating charge voltage and the charging current， the indication lamp is refers to

Shown are the charge or have been filled;

7 with a current limiting protection function， even if the output short circuit can not be burnt out module.

The 8 onboard voltage， current meter can be self calibration， never do not exist the problem of accurate!

9 with fins， giving the pillars!

Module parameters

Input voltage: 5-36V

Output voltage: 1.25-32V continuous adjustable (can only do step-down module use， the input must be greater than the output of more than 2V)

Output current: adjustable， maximum 5A (recommended in 4.5A)

The maximum output power: 75W (recommended， in the 50W high pressure difference use please reduce power)

Working temperature: -40~+85 degrees

Operating frequency: 180KHz

The highest conversion efficiency: 96%

Short circuit protection:

Over temperature protection: (automatic shutdown output ultra temperature after)

Input reverse connection protection: No， (such as the need to please in the input string into the high current diode)

Installation: 4 3mm screws

Connection: connecting terminal or welding terminal， V-IN input， V-OUT output

Module size: length 68.2mm width 38.8mm high 15mm

Weight: 35g TB2ocbvXVXXXXakXpXXXXXXXXXX-13099402

Note that receive module， due to the delivery test the default is 20 v output， such as low voltage， to need to counterclockwise to lower voltage， probably more than 10 laps around.

Range of application

1. As a general step-down module USES with over-current protection ability

Method of use:

(1) according to the right key， digital table adjustment to display output voltage interface， adjust the constant-voltage potentiometer， reach you want to make the output voltage of the voltage value;

(2) digital table adjustment to display output current interface， direct the output of the sub module (find a thick wire sub output)， regulating the constant current potentiometer on digital over-current protection value of the current value reaches; (such as on-board ammeter displays the current value is 4 a， the module maximum current are limited to 4 a， current to the 4 a red indicator)

(3) connected to the load， and work.

2. Used as a battery charger

Without constant current function module can\'t be used to recharge the battery， due to the consumption of the battery and charger of the pressure difference is very big， cause the charging current is too large， causing cell damage， so start to use constant current charging the battery， when charging to a certain degree of automatic switch back to the constant voltage charging.

Method of use:

(1) to determine the battery float charging voltage and charging current; (if 3.7 V / 2200 mah lithium battery parameters， then float charging voltage of 4.2 V， 1 c， maximum charging current is 2200 ma)

(2) the no-load condition， the module of digital table regulating interface display output voltage to adjust the "constant pressure potentiometer" to make the output voltage float charging voltage;

(3) digital table adjustment to display output current interface， direct the output of the sub module (find a thick wire sub output)， regulating the constant current potentiometer to digital current value from the list of predetermined charging current value;

(4) charging lamp current default factory charging current of 0.1 times; (the battery in the process of charging electric current is reduced gradually， and gradually by the constant current charging into constant voltage charging， if charging current setting is 1 A， then when the charging current is less than 0.1 A， blue lights， green lights up， when the battery to complete)

(5) connected to the battery and charging.

(steps 1， 2， 3， 4 is: input power， output light don\'t pick up the battery)

3. Used as LED constant current driver module

(1) make sure you need to drive the LED working current and highest working voltage;

(2) under the condition of no-load， digital table adjustment to display output voltage interface， adjust the "constant pressure potentiometer" make the output voltage at the LED working voltage;

(4) connected to the LED， commissioning.

(step 1， 2， 3: input power， output light does not meet the LED light)

Matters needing attention

Module of the input fields， and output don\'t together， this will cause bypass module current sampling resistance， so that the module can\'t adjust the size of the output current， load cases easy to burn the module.

Module series with the output current sampling resistance， when load is connected will be 0 ~ 0.2 V voltage drop， as normal.

Have customers reflect the module can not adjust output voltage， when you encounter this problem， please the potentiometer 10 counterclockwise circle above， using the module can be normal to adjust the voltage. Because of the module factory， the default output voltage at 17 v.

More than 3 a， 35 w output， please strengthen the cooling!

Onboard voltage， ampere meter from calibration method:

1. The onboard digital table shows that the output voltage， long press the right button 2 seconds to loosen， voltmeter， and the output voltage indicator light "OUT" synchronous flash， at this time into the output voltage calibration mode; Similarly， when the input voltage IN the voltmeter display， long press the right button 2 seconds to loosen， voltmeter， and the input voltage indicator light "IN" synchronous flash， at this time into the input voltage calibration mode; When voltmeter display output current， long press the right button 2 seconds to loosen， current meter， this time into the output current calibration mode;

2. Touch the right key， higher voltage (current) a unit， a light touch on the left key， voltage (current) reduce a unit; Due to a unit of voltage is less than 0.1 V， so you need to press the 1-5 consecutive can see the voltmeter change 0.1 V， the concrete continuous button several times depends on the current display voltage， current shows that the higher the voltage， the fewer the number of pedestrian.

3. The voltage (current) after the adjustment， long press the right button for 2 seconds after releasing， can exit the calibration model at this time， all the parameters set up automatic electricity saving.

Note: this function is used to display the precision of calibration of voltage， current， not to adjust output voltage， current value. This feature is designed to meet your higher accuracy requirement， calibrated once you just can get accurate values on the whole range， please feel free to use.