Adjustable Automatic Buck Boost Power Supply Module Step Up & Step Down Module CV CC Version

Adjustable Automatic Buck Boost Power Supply Module Step Up & Step Down Module CV CC Version

Features:
- Wide voltage input 5-30V, wide voltage output 0.5-30V. It can boost and step down. For example, if you adjust output voltage to 18V, then any change between 5-30V input voltage will always output 18V constant. Input 12V, adjust potentiometer to set any output of 0.5-30V.
- High power, high efficiency and better performance than XL6009 / LM2577 solution. Uses external 60V75A high-power MOS in parallel with a high-current, high-withstand voltage diode SS56. It is better than SS34 of 6009 or 2577 solution, because according to buck-boost principle, the withstand voltage of MOS and SS56 is greater than the sum of input plus output voltage.
- FeSiAl magnetic ring inductor, high efficiency. No inductor howling in constant current mode.
- Current can be set for limiting output current, constant current driving, and charging lamps.
- Built-in output anti-backflow function, no need to add anti-backflow diode when charging.

Specifications:
- Input voltage: 5-30V
- Output voltage: 0.5-30V
- Output current: can work stably at 3A for a long time, and can reach 4A under enhanced heat dissipation
- Output power: natural heat dissipation 35W, enhanced heat dissipation 60W
- Conversion efficiency: about 88%
- Short-circuit protection: Yes
- Working frequency: 180KHZ
- Size: 65*32*21mm (L*W*H)
- Weight: 30g

Package Included:
- 1 x Buck Boost Module

Note: Batteries are not included in the package.

Using Method:
1.Used as a common buck-boost module, with over-current protection capability
(1)Adjust CV constant voltage potentiometer to make output voltage reach the voltage value you want
(2)Measure output short-circuit current with multimeter's 10A current range (just connect two test probes directly to output end), and adjust CC constant current potentiometer to make output current reach predetermined over-current protection value. (For example, the current value displayed by a multimeter is 2A, then the maximum current when you use the module can only reach 2A. When current reaches 2A, red constant voltage and constant current indicator is on, otherwise the indicator is off).

Attention: When used in this state, because output terminal has a 0.05 ohm current sampling resistor, there will be a voltage drop of 0 ~ 0.3V after connecting load. It is normal. This voltage drop is not pulled down by your load, but rather to the sampling resistor.

2.Use as a battery charger
Modules without constant current function cannot be used to charge battery. Due to the large voltage difference between drained battery and charger, when charging current is too large, battery will be damaged. Therefore, at the beginning, battery should be charged with constant current, and it will automatically switch back to constant voltage when charging reaches a certain level.

(1)Determine floating charge voltage and charging current of battery you need to charge. If lithium battery parameter is 3.7V / 2200mAh, then floating charge voltage is 4.2V, and the maximum charging current is 1C, which is 2200mA.
(2)Under no-load conditions, a multimeter measures output voltage and adjusts constant voltage potentiometer to make output voltage reach floating charge voltage. If you charge a 3.7V lithium battery, adjust output voltage to 4.2V).
(3)Use ta multimeter 10A current scale to measure output short-circuit current (just connect two test probes directly to output terminal), and adjust constant current potentiometer to make output current reach predetermined charging current value.
(4)By default, charging lamp current is 0.1 times the charging current. (The current of battery is gradually reduced during charging process, and gradually changes from constant current charging to constant voltage charging. If charging current is set to 1A, then when charging current is less than 0.1A, blue light is off and green light is on. At this time, battery is fully charged.
(5)Connect to battery and charge.

(Steps 1, 2, 3, and 4 are: input terminal is connected to power supply, and output terminal is not connected to battery without load.)

3. Used as a high-power LED constant current driver module
(1) Determine the working current and maximum working voltage you need to drive LED;
(2) Under no-load conditions, a multimeter measures the output voltage and adjusts constant-voltage potentiometer so that the output voltage reaches the maximum working voltage of LED;
(3) Measure output short-circuit current with a multimeter 10A current, and adjust constant current potentiometer to make the output current reach predetermined LED working current;
(4) Connect to LED and test.

(Steps 1, 2, and 3 are: the input is connected to power supply, and the output is not connected to LED light.)

Attention: When this module is used over 3A, 35W, please strengthen heat dissipation.

Precautions:
1.The input IN- of the module is forbidden to be short-circuited with the output OUT-, otherwise the constant current function is invalid.
2.Please ensure that the power of power supply is always greater than the power required by output load.
3.Module input has no input anti-reverse connection function. Please pay attention to the positive and negative directions of power supply.
4.If the module wants to output at full load, input voltage should be above 8V. When input voltage is 5V, output power is about 15W. The maximum current value of the module is 4A, and the premise is limited by the maximum output power. For example, if output is 17V, current should not be greater than 2A.
5.Module with output short-circuit protection. Short-circuit protection is turned on, and the module automatically turns off output. Power on the module to recover. If your power supply does not have output current limit protection, it is recommended to connect a fuse in series with the front end of the module input to improve safety factor.
6.The module has input under-voltage protection function, the default is about 4.2V. Below this value, output is automatically disconnected. Power on the module to recover (it is the voltage at the port of the module. When input current is relatively large, do not ignore the divided voltage on input wire).
7.Three indicators, namely CV and CC status indicator (red light is lit when in CC mode), charging indicator (blue), charging completion indicator (green; light changing current is 1/10 of set current).