Panel constant voltage current adjustable automatic step-up and step-down power supply board module Buck boost | Обустройство дома

Instructions:

1.Used as a normal buck-boost module with overcurrent protection

Instructions:

(1AdjustmentCVConstant voltage deviceTo make the output voltage reach the voltage you want

(2) with a multimeter10AThe current file measures the output short-circuit current (directly connect the two test leads to the output terminal),Adjust simultaneouslyCCConstant current potentiometerThe output current is brought to a predetermined overcurrent protection value. (For example, the current value displayed by the multimeter is2A, then the maximum current you can only use when using the module2ACurrent to2AWhen the red constant voltage constant current indicator is on, otherwise the indicator is off)

Note: When using in this state, since the output has0.05European current sampling resistor, after the load is connected0~0.3VThe pressure drop, this is normal! This voltage drop is not pulled down by your load, but falls down to the sampling resistor.

2.Used as a battery charger

Modules without constant current function cannot be used to charge the battery. Because the voltage difference between the battery and the charger that consumes electricity is too large, the charging current is too large, causing damage to the battery. Therefore, the battery should be used at the beginning. Stream charging, automatically switch back to constant voltage charging when charging to a certain extent.

Instructions:

(1) Determine the float voltage and charge current you need to charge the battery; (if the lithium battery parameters are3.7V/2200mAh,Then the float voltage is4.2V, maximum charging current1C, which is2200mA)
(2Under no-load conditions, the multimeter measures the output voltage, and adjusts the constant voltage positioner to make the output voltage reach the float voltage;3.7VLithium battery charging, adjust the output voltage to4.2VYes)
(3) with a multimeter10AThe current file measures the output short-circuit current (directly connect the two test leads to the output terminal),Adjust simultaneouslyConstant current potentiometerMaking the output current reach a predetermined charging current value;
(4Charger turn lamp current defaults to factory0.1Double charging current;(The current of the battery is gradually reduced during the charging process, gradually changing from constant current charging to constant voltage charging, if the charging current is set1A, then when the charging current is less than0.1AWhen the blue light is off, the green light is on, and the battery is fully charged.)
(5) Connect the battery and charge.

(step1,2,3,4It is: input terminal power supply, output terminal is not connected to battery)

3.As high powerledConstant current drive module

(1) Make sure you need to driveledOperating current and maximum operating voltage;

(2Under no-load conditions, the multimeter measures the output voltage, and the constant voltage positioner is adjusted to achieve the output voltage.ledMaximum working voltage

(3) with a multimeter10AThe current file measures the output short-circuit current, and adjusts the constant current potentiometer to make the output current reach a predetermined value.ledWorking current;

(4Connectedled,Test machine.

(step1,2,3For: input power, output no load is not connectedledlight. )

Note: This module is over3A,35WWhen using, please strengthen the heat! ! !

Precautions:

1.Module inputIN-Prohibition and outputOUT-ShortOtherwise, the constant current function is invalid.

2.Please ensure the power moment of the power supplymore than theOutput the required power of the load!

3.Module inputNo input anti-reverse functionPlease pay attention to the positive and negative directions of the power supply.

4.If the module wants to fully load the output, the input voltage should be8VAbove, when the input voltage is5VWhen the output power is about15W. Maximum module current value4A,premiseLimited by maximum output power, such as output17V, the current should be no more than2A.

5.ModuleWith output short circuit protectionAfter the short circuit protection, the module automatically turns off the output and restores the module after power-on. If your power supply has no output current limiting protection, it is recommended to connect the fuses in series with the front end of the module to improve the safety factor.

6.ModuleInput undervoltage protectionFunction, default is4.2VLeft and right, below this value, the output will be automatically disconnected, and the module can be restored after power-on (note the voltage at the module port. When the input current is relatively large, do not ignore the voltage divider on the input wire).

7.Module containsThree indicators, constant voltage constant current status indication (red, bright current mode), charging indication (blue), full indication (green, the size of the lamp current is set current1/10).