一. Product highlights:
1.1 LCD input and output voltage, output current, output power;
1.2. input anti-reverse protection, reverse connection does not burn;
1.3. Can be step-up and step-down, the output voltage 0.5-30V arbitrary regulation, current limit 0-4A arbitrary regulation;
1.4 output anti-intrusion, the battery charge without additional anti-reflux diodes;
1.5. The status of the button control output is ON / OFF, and you can set the power on default to ON or OFF.
1.6. Ascending and descending chip as main controller, external 60V 75A MOS tube as switch, dual 60V 5A SS56 Schottky rectification, 60V voltage value, better than marketable XL6009/LM2577 program (a lot of device pressure value is not enough, MOS tube and Schottky diode pressure value must be larger as the value of input plus input voltage);
1.7. output ripple small, LC filter;
1.8. With the heatsink, send the insulation pillar for the module bracket.
二. Product parameters:
Input voltage: 5.5-30V (input voltage 5V, usually you can get a step-down swing, but the voltage and current meter values are not accurate; less than 4.7V, under-voltage protection)
Output voltage: 0.5-30V
Output current: long-term stable work in 3A, strengthen the heat can reach 4A
Output power: 35W natural cooling, heat dissipation to improve 50W
Voltage display resolution: 0.05V
Current display resolution: 0.005A
Conversion efficiency: about 88%
Soft start: Yes (very efficient when loading, start may fail)
Input reverse polarity protection: Yes
Output Protection: Yes
Short circuit protection: yes
Working frequency: 180KHZ
Size: L*W*H 66*48*21mm
Mounting hole: 4mm diameter
Weight: 46g
三. Function description:
3.1. Module has IN / OUT, ON / OFF two buttons: IN / OUT button to switch the display of the input voltage and output voltage, long press to switch the display of the output power of the output current; ON / OFF button to turn on or off the output. Long press. Default output state at power up is ON or OFF.
3.2.CC is the current adjustment potentiometer, clockwise rotation, can increase the set current, when the load current reaches the set current, enter the constant current state, CC constant current indicator (red) lights up; the right CV is the voltage adjustment potentiometer, clockwise rotation, can increase the output voltage. ON indicator is the output status indicator when the output voltage is on, otherwise off.
四. How to use:
4.1. Used as an ordinary buck-boost module with over-current protection function
(1) Adjust the CV constant voltage potentiometer so that the output voltage reaches the desired voltage.
(2) Measure the output short-circuit current with a 10A current meter (connect the two test leads directly to the output end), and adjust the CC constant current potentiometer so that the output current reaches the preset overcurrent protection value. (For example, when the current value displayed by the multimeter is 2A, the maximum current only reaches 2A when you use the module. When the current reaches 2A, the constant voltage and constant current red LED is on, otherwise the LED is off )
Caution: In this state, there will be a voltage drop of 0 to 0.2V at the output due to the current sensing resistor. At the same time, the input and output lines have a certain linear voltage drop. This is a normal phenomenon!
4.2. Used as a charger
Without constant current function, the module cannot be used to charge the battery, because the power of the battery and the charging pressure drop is large, causing the charging current to be too large, causing damage to the battery, so the start of charging battery up Switch constant current charge when the charge automatically switches back to constant voltage charge to a certain extent.
(1) Find the floating voltage and charging current you need the battery pack (if the lithium battery parameter is 3.7V/2200mAh, the floating voltage is 4.2V and the maximum charging current is 1C, that is, 2200mA ).
(2) At no load, the multimeter measures the output voltage and adjusts the constant voltage potentiometer so that the output voltage reaches the floating voltage. (When the 3.7V lithium battery is charged, adjust the output voltage to 4.2V.)
(3) Measure the output short-circuit current with a 10A ammeter (connect the two test leads directly to the output terminal), and adjust the constant current potentiometer so that the output current reaches the specified charging current value.
(4) Connect the battery to charge it.
(Steps 1, 2 and 3 are as follows: input termination power supply, the output is not connected to the battery charge.)
4.3. Used as LED constant current driver module
(1) Make sure you need to drive the LED working current and maximum working voltage;
(2) At no load, the multimeter measures the output voltage and adjusts the constant voltage potentiometer so that the output voltage reaches the maximum working voltage of the LED.
(3) with a multimeter 10A current measurement output short-circuit curren
t, while adjusting the constant current potentiometer so that the output current reaches the predetermined LED driving current;
(4) connected to the led testing machine.
(Steps 1, 2 and 3 are as follows: input the power and output the LED with no load.)
Note: this module is more than 3A, use 35W, please boost the heat! ! !
五. A notice:
5.1. Prevent module input IN- short circuit with output OUT-, otherwise the constant current function is invalid.
5.2. Please make sure the power of the power supply is larger than the power the output load needs!
5.3. If the module is to be fully loaded with output, the input voltage should be above 8V. When the input voltage is 5V, the output power is about 15W, and the voltage ammeter fails. Module current value 4A, the requirement for the maximum output power, such as the output 17V, the current should not exceed 2A.
a notice
- Please allow minor errors due to manual measurement. Thank you for your understanding.
- Monitors are not calibrated, item color displayed in photos may be showing slightly different from the real object. Please take the real one as the standard.
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