USB CVCC Buck Boost Voltage Converter User Manual

USB CVCC Buck Boost Voltage Converter

Introduction

It is a DC adjustable constant voltage constant current step-up/down power supply module with an LED digital tube display. It supports a fast charger for QC2.0, QC3.0, AFC, FCP, SCP fast charge protocol. The display output voltage, output current, and output power. Adjustable output voltage and current. Set output current to meet the requirements. It can be used as an ordinary buck power supply module, charger, and LED constant current driver. Simple and efficient, practical.

Features

1>. Support fast charger
3>. Support constant voltage constant current adjust
4>. 4-Bit digital tube display
5>. Three input power modes
2>. Support anti-backflow protection
6>. Support over-current protection
7>. Support short circuit Protection
7>. Support over-voltage protection
8>. Support over power protection
9>. Support over-temperature protection
10>. Support charging mode
11>. High resolution
12>. Multiple parameters can be displayed in turn
13>. Comfortable outer casing

Parameters

1>. Package Included: 1pcs USB CVCC Fast Charger Buck Boost Voltage Converter
2>. Size: 833423mm
3>. Input Voltage for Pads: DC 4.0V-13.0V(Note USB input)
4>. Input Voltage for USB: DC 5.0V
5>. Output Voltage: DC 0.5V-30.0V
6>. Output Current: 2A
7>. Output Power: 15W(Max)
8>. Voltage Display Precision: ±0.1V Deviation
9>. Voltage Display Resolution: 0.1V
10>. Current Display Range: 0~2.2A
11>. Current Display Precision: ±0.05A Deviation
12>. Current Display Resolution: 0.001A
13>. Capacity Precision: 0.00W~15.0W
14>. Protection Temperature Threshold: 100℃
15>. Conversion efficiency: 95%
16>. Working current: 30mA
17>. Working Temperature range: -20℃~85℃
18>. Working Humidity Range: 0%-95%RH

Button/Potentiometer/LED Introduction

1>. Long press means need to keep press for more than 3second.
2>. Left Button: ON/OFF button. The short press is used to turn ON or OFF output voltage at display mode or as ‘Minus -’ in calibration mode or trigger fast charge at fast charge protocol selection mode. Long press is used to set default ON or OFF for next re-power at display mod3>. Right Button: SELECT button. Short press to switch display output voltage, output curve output power or display these parameters in turn at display mode or as ‘Plus +’ in calibration or trigger fast charge at fast charge protocol selection mode. A long press is used to enter or exit calibration mode.
4>. TRIG Button: Short press to select fast charging protocol. Long press to enter or exit fast charge protocol selection interface.
5>. CV Potentiometer: Adjust output voltage. Increase the output voltage when rotating clockwise. Please rotate the CV potentiometer 10 turns in counterclockwise if the output voltacannot is adjusted.
6>. CC Potentiometer: Adjust output current. Increase the output current when rotating clockwise. Note: It is not keeping a fixed output current. When the load current reaches the set current value, the module starts to fix output this current value. Short circuit output terminal adjust output current.
7>. ON LED: Green Output indicator. It will turn ON when there is an output at output termOtherwise it is OFF.
8>. CC LED: Red Constant current output indicator. It enters the constant current state wthe load current reaches the set current and CC constant current indicator turns ON.
9>. FC LED: Blue Fast charge deceiving indicator. Fast charge protocol after the succesdeception.
10>. Input terminal: There are three input methods:
10.1. Method 1: Standard Type A USB Male. It just can input DC 5V.
10.2. Method 2: Micro USB Female. It just can input DC 5V.
10.3. Method 3: Type-C USB Female. It just can input DC 5V.
10.4. It can only choose one input method.
11>. Output terminal: KF-301-2P 5.08mm blue terminal. It can output DC 0.5V-30.0V.

Function

1. Fast Charger Function:
   1>. Support intelligent fast charge deception function to solve the problem of insufficient power supply of USB input port.
   2>. Support mainstream fast charging protocol: QC2.0, QC3.0, AFC, FCP, SCP. 3>. Users can choose not to deception or automatically choose the deception mode.

2. Calibration Function:
   1>. It can calibrate output voltage and output current. 2>. Calibrate output voltage: Long press button SELECT’ when displaying output voltage into calibrating output voltage. Then the screen will flash. Short press button ON/OFF’ to decrease the value. Short press the button SELECT’ to increase the value. Long press the buttonSELECT’ again to save and exit setup mode. Note: User deed to press the button multiple times then parameters will change if the voltage is very low.
   3>. Calibrate output current: Long press button SELECT’ when displaying output current into calibrating output current. Then the screen will flash. Short press buttonON/OFF’ to decrease the value. Short press the button `SELECT’ to increase the value. Long press the right button again to save and exit setup mode. Note: User deed to press the button multiple times then parameters will change if the current is very low. The calibration is more accurate when the current is greater than 1A. The display error is large when the output current is less than 0.05A. The module may not be displayed when the output current is less than 10-40mA.

3. Protective Function:
   1>. Over-Voltage Protection: The module will turn OFF output voltage automatically if the output voltage is more than 30.5V.
   2>. Over-Current Protection: The module will turn OFF output automatically if the output current is more than 2A.
   3>. Over-Power Protection: Module will turn OFF output automatically if the output power is more than 15W. It will display -OP-‘. Users need to reduce load power and then press theON/OFF’ button.
   4>. Current error: Large display error when the output current is less than 0.05A. It can not display the output current if the current is 10~40mA.
   5>. Over Temperature Protection: Module will turn OFF output automatically if the temperature is more than 100. It will display -OT-‘. Users need to reduce load power and then press theON/OFF’ button.

Using Steps

1. As an ordinary step down power module:
   1.1. Connect right input voltage at input terminal;
   1.2. Adjust CV constant voltage potentiometer to set output voltage according to require. Rotate CV potentiometer counterclockwise for more than 10 turns if the output voltage can not be adjusted.
   1.3. Rotate CC potentiometer counterclockwise more than 10 turns at first.
   1.4. Test Output short circuit current by multimeter at 10A or 20A(Connect two-Test Probes to the output terminal on module). Or Short circuit output terminal directly.
   1.5. Rotate CC constant current potentiometer clockwise to set output current according to require over-current protection value.
   1.6. Test and use (E. g: Module’s maximum output current is 1A if display 1A on multimeter. Red LED indicator will turn on if output reach to 1A. Otherwise LED is OFF. )
   1.7. The output voltage will decrease due to the current sampling resistor at the output. The higher the current, the more the voltage is reduced. 1.8. The output current can not keep fixed value output. It changes with load. But It can not exceed the set output current value.

2. As a charger:
   2.1. Tops: The power supply module can not be used as a charger module if it does not support the constant current function. The voltage difference between the battery with insufficient voltage and the charger is very large. Causes excessive charging current even damages the battery. So it needs to keep charging in constant current mode to reaching a certain level. Then automatically switch back to constant voltage charging.
   2.2. Make sure floating charge voltage and charge current for the battery. If the lithium battery’s parameter is 3.7V/2200mAh, then the float charge voltage is 4.2V, and the maximum charging current is 1C, which is 2200mA.
   2.3. Connect the right input voltage at the input terminal. (Note: Please don’t connect load during set parameter).
   2.4. Test output voltage by multimeter and adjust CV potentiometer to make sure output voltage reaches to require floating charge voltage. (If charge a 3.7V lithium battery, adjust the output voltage to 4.2V). Or Short circuit output terminal directly.
   2.5. Rotate CC potentiometer counterclockwise more than 10 turns at first. 2.6. Test Output short circuit current by multimeter at 10A or 20A(Connect two-Test Probes to the output terminal on module) 2.7. Rotate CC constant current potentiometer clockwise to set output current according to require to charge current value. 2.8. Connect the battery to the output terminal and start the charge.

3. As a high power LED constant current driver:
   3.1. Make sure LED working current and maximum working voltage.
   3.2. Connect the right input voltage at the input terminal. (Note: Please don’t connect load during set parameter).
   3.3. Test output voltage by multimeter at the output terminal and adjust CV potentiometer to set output voltage to LED’s maximum working voltage.
   3.4. Rotate the CC potentiometer counterclockwise for more than 10 turns.
   3.5. Test Output short circuit current by multimeter at 10A or 20A(Connect two-Test Probes to the output terminal on module)Or Short circuit output terminal directly.
   3.6. Rotate CC constant current potentiometer clockwise to set output current according to require LED working current.
   3.7. Connect LED and test.

Note

1>. It is a DC power module, So it can not connect to AC power.
2>. Please don’t short output.
3>. Please make sure input power is more than load power.
4>. Please step down output power if the module is hot.
5>. Rotate CV potentiometer counterclockwise for more than 10 turns if the output voltage can not be adjusted.
6>. The output current can not keep fixed value output. It changes with load. But It can not exceed the set output current value.
7>. There is a protective film on the surface of the shell. It is recommended to tear it off for a clearer effect.
8>. Please read the user manual and description before use.

Application

1>. Ordinary power supply
2>. Battery charger
3>. LED drive power
4>. Instrument voltage display
5>. Test meter
6>. Circuit test
7>. Power conversion
8>. Fan governor

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