Description:
This is super handy switching buck converter with integrated display for voltage, current and efficiency. With the 4 digit 7-segment display, you can adjust the output voltage and current easily with out multimeter. The constant voltage (output) and maximum current (output) can be adjusted via on board multi-turn potentiometer.
Note: The USB port output voltage is the same as the module output voltage, it is NOT fixed at 5V, please adjust the output voltage accordingly if you need to use it to power up USB devices.
Example applications:
- Step down voltage from Solar panel to Li-po or Li-ion battery charging circuit (Normally is 4.5V to 6.0V)
- Step down switching regulator with current limits to protect your load or power source
- Constant current regulator for LED driver.
- Lithium based battery charger.
The module comes with several LED indicators:
- IN LED, to indicate the present of Input voltage
- OUT LED, to indicate the present of output voltage
- CC/CV: Red color LED, light up means constant current mode
- CHARGE, to indicate charging in process
- FULL, to indicate battery is full
Features:
- Supported input voltage: 5V to 36VDC
- Support output voltage: 1.25V to 32VDC. Again, this is step down voltage, input voltage should be higher than output voltage.
- Output current: Adjustable, maximum is 5A, but practically is 4.2A.
- Maximum output power: 75W, but recommend at 50W because higher output power decrease the efficiency
- Operating temperature: -40 degree C to +85 degree C
- Switching frequency: 180KHz
- Efficiency: 96%
- Output short circuit protection: Yes
- Over temperature protection: Yes, the output will be shutdown when the temperature is over the safe level.
- Reverse Polarity Protection at Vin: NO
- Dimension: 68.2mm x 38.8mm x 15mm
- Weight: 35gram
Guides:
As Normal step down regulator with current limit
- Do not connect any load, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage and vice versa), the value on 7-segment display will vary accordingly.
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current), the value on 7-segment will vary accordingly.
- Now, disconnect the short wire, and connect to your load.
Notes:
- Do not short circuit the output terminal for too long when adjusting the constant current !
- Use thicker wire (instead of jumper wire) when short circuiting the output terminal!
- Only connect load when voltage and current is already adjusted to rated load current and voltage.
Lithium base charger:
- A battery charger must have current limit feature to charge battery. The reason is because when a battery is depleted, the voltage different from charger and battery is huge and this battery will draw a lot of current, but high current will eventually damage the battery.
- 1st, determine the battery charging voltage and charging current.
- DO NOT Connect any load, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage), until the 7-segment display "4.20U".
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current), until 0.65A (0.5C of 1300mA).
- Now, disconnect the short wire, and connect to the Lipo battery, MAKE SURE the polarity of the battery is correct.
- The CHARGE LED (BLUE) and CC LED (RED) will light ON to indicate the charging is in progress.
- Initially, the charging happen in constant current mode, but gradually current will reduce (CC LED will OFF) until constant voltage.
- When the current is 0.1 of constant current, the CHARGE LED will off and FULL LED (GREEN) will light ON.
As constant current LED driver:
- 1st, determine the LED driving current and operating voltage.
- With no load condition, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage), until the 7-segment display the LED operating voltage.
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current) to the driving current of LED.
- Now, disconnect the short wire, and connect to the LED.
Resources:
Description:
This is super handy switching buck converter with integrated display for voltage, current and efficiency. With the 4 digit 7-segment display, you can adjust the output voltage and current easily with out multimeter. The constant voltage (output) and maximum current (output) can be adjusted via on board multi-turn potentiometer.
Note: The USB port output voltage is the same as the module output voltage, it is NOT fixed at 5V, please adjust the output voltage accordingly if you need to use it to power up USB devices.
Example applications:
- Step down voltage from Solar panel to Li-po or Li-ion battery charging circuit (Normally is 4.5V to 6.0V)
- Step down switching regulator with current limits to protect your load or power source
- Constant current regulator for LED driver.
- Lithium based battery charger.
The module comes with several LED indicators:
- IN LED, to indicate the present of Input voltage
- OUT LED, to indicate the present of output voltage
- CC/CV: Red color LED, light up means constant current mode
- CHARGE, to indicate charging in process
- FULL, to indicate battery is full
Features:
- Supported input voltage: 5V to 36VDC
- Support output voltage: 1.25V to 32VDC. Again, this is step down voltage, input voltage should be higher than output voltage.
- Output current: Adjustable, maximum is 5A, but practically is 4.2A.
- Maximum output power: 75W, but recommend at 50W because higher output power decrease the efficiency
- Operating temperature: -40 degree C to +85 degree C
- Switching frequency: 180KHz
- Efficiency: 96%
- Output short circuit protection: Yes
- Over temperature protection: Yes, the output will be shutdown when the temperature is over the safe level.
- Reverse Polarity Protection at Vin: NO
- Dimension: 68.2mm x 38.8mm x 15mm
- Weight: 35gram
Guides:
As Normal step down regulator with current limit
- Do not connect any load, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage and vice versa), the value on 7-segment display will vary accordingly.
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current), the value on 7-segment will vary accordingly.
- Now, disconnect the short wire, and connect to your load.
Notes:
- Do not short circuit the output terminal for too long when adjusting the constant current !
- Use thicker wire (instead of jumper wire) when short circuiting the output terminal!
- Only connect load when voltage and current is already adjusted to rated load current and voltage.
Lithium base charger:
- A battery charger must have current limit feature to charge battery. The reason is because when a battery is depleted, the voltage different from charger and battery is huge and this battery will draw a lot of current, but high current will eventually damage the battery.
- 1st, determine the battery charging voltage and charging current.
- DO NOT Connect any load, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage), until the 7-segment display "4.20U".
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current), until 0.65A (0.5C of 1300mA).
- Now, disconnect the short wire, and connect to the Lipo battery, MAKE SURE the polarity of the battery is correct.
- The CHARGE LED (BLUE) and CC LED (RED) will light ON to indicate the charging is in progress.
- Initially, the charging happen in constant current mode, but gradually current will reduce (CC LED will OFF) until constant voltage.
- When the current is 0.1 of constant current, the CHARGE LED will off and FULL LED (GREEN) will light ON.
As constant current LED driver:
- 1st, determine the LED driving current and operating voltage.
- With no load condition, press the push button on right (under OUT LED), until you see the last digit of 7 segment display "U" which represent "V", and the OUT LED is light up.
- Use a flat screwdriver to adjust the CV (Constant Voltage) multiturn potentiometer (clockwise to increase output voltage), until the 7-segment display the LED operating voltage.
- Now, press the push button on right (under OUT LED) until you see the last digit of 7-segment display "A" which represent "Ampere".
- Short the output terminal (terminal block) with a wire, YES, short it!
- Now the 7 segment will display the output current, adjust the CC (Constant Current) multiturn potentiometer (clockwise to increase maximum output current) to the driving current of LED.
- Now, disconnect the short wire, and connect to the LED.
Resources:
