Large current 5A constant current LED driver power supply lithium-ion battery module
5A Constant voltage constant current module
When you use this product, the module input and output to the ground and do not co-together, this will cause the board high-power current sense resistor is bypassed, so that the module can not adjust the output current size, then the case load is easy to burn power chip module.
The module is easy to use, powerful! ! ! A module has three major features to meet your vast majority of occasions! ! !
1. High power, high efficiency, 5A, low ripple;
1 Use as an ordinary step-down modules with overcurrent protection capabilities;
2 As various voltage lithium batteries, batteries, nickel-cadmium nickel-metal hydride batteries Battery Charger for solar panels, wind turbines and other occasions;
3 Used as high-power LED constant current driver module;
3. Constant voltage and current has two modes, there are light indicates which mode is currently in the module;
4. When used as a lithium battery charger, you can set the float voltage and charge current, it has a light finger
It is shown being charged or has been filled;
5. Current limiting protection, short circuit will not burn even if the output module.
one, Module parameters
Input voltage: 4-38V
Output voltage: 1.25-36V continuously adjustable
Output current: adjustable, 5A
Output Power: 75W maximum
Operating temperature: -40 to + 85 degrees
Operating frequency: 180KHz
Conversion efficiency: up to 96%
Short circuit protection: Limit current 8A)
Overtemperature protection: Automatic shutdown after over-temperature output
Input reverse polarity protection: None, If required, please enter the string into the high-current diode
Installation: four 3mm screws
Connection: terminals or solder terminals, V-IN is the input, V-OUT output
Module Size: Length 51.2mm Width 26.2mm height 15mm
1. Use as an ordinary step-down modules with overcurrent protection capabilities
1 Constant adjustment potentiometer, the output voltage reaches the value you want
2 Measuring the output short-circuit current with a multimeter 10A current file Directly to the two leads to the output to While adjusting the constant current potentiometer allows the output current reaches a predetermined overcurrent protection value. For example, the current value is displayed on the multimeter 4A, then you can use the module to a maximum current of 4A, 4A current to the constant voltage constant current when the red light is on, otherwise the LED is off
Note: When used in this state, since the output of 0.05 ohm current sense resistor, there will be 0 ~ 0.3V voltage drop after connected to the load, this is normal! This drop is not being pulled down your load, but down-sampling resistor.
2. Use as a battery charger
Without constant function module can not be used to charge the battery, due to the complete consumption of the electrical battery charger with big difference between charging current is too large, resulting in damage to the battery, so start to the battery using a constant current charging, when charging to a certain extent automatically switch back to constant voltage charging.
1 Sure you need to charge the battery float voltage and charging current; If the argument is a lithium battery 3.7V / 2200mAh, then float voltage of 4.2V, the maximum charging current 1C, namely 2200mA
2 Under no-load conditions, the multimeter to measure the output voltage, the constant voltage potentiometer to adjust the output voltage reaches the float voltage; If to 3.7V rechargeable lithium battery, the output voltage can be adjusted to 4.2V
3 Measuring the output short-circuit current with a multimeter 10A current file Directly to the two leads to the output to While adjusting the constant current potentiometer allows the output current reaches a predetermined charge current value;
4 Charge turn lamp current default is 0.1 times the charging current; (Battery during charging current is gradually reduced, gradually turned from the constant current charging to constant voltage charging, if the charging current setting is 1A, then when the charge current is less than 0.1A when the blue lights off, the green light is on, then the battery is fully charged)
5 Connected to the battery charge.
1,2,3,4 steps as: input termination power output unloaded battery is not connected
3. Used as high-power LED constant current driver module
1 You need to determine the driving LED current and the maximum operating voltage;
2 Under no-load conditions, the multimeter to measure the output voltage adjustment potentiometer allows the output voltage reaches the constant voltage LED maximum working voltage;
3 10A current file with a multimeter to measure the output short-circuit current, while adjusting the constant current potentiometer allows the output current reaches a predetermined LED operating current;
4 Connected to the LED, the test machine.
Steps 1 through 3 are: power supply input connected to the output load is not connected LED lights.
Note: This module is more than 3A, 35W in use, to enhance heat dissipation! ! !
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