1W/2W/3W LED Driver 350mA/700mA PWM Dimming Input 5-35V DC Constant Current Module

 

Item Parameter Limit Input Voltage 7-30V Recommended Voltage 12/24V Input Filtering Capacitor Output Voltage Range 1.2-28V PWM signal limit frequency 20-20000HZ Output Current Accuracy ±2% Temperature Coefficient ±0.015% Full load power 96W Output short circuit protection Continuous Output Current 700mA Module Size 26*15mm

 

 

IN+ Positive terminal of power supply IN- Negative terminal of power supply LED+ Connects to the anode of the LED LED- Connects to the cathode of the LED PWM Dimming control signal (2.8V-6V on) Note: The signal must be connected to a common ground reference, otherwise the signal is unstable

For a certain frequency of PWM dimming, the output current of the driver has a certain relationship with the duty cycle of the PWM signal, the calculation method refers to this formula:
lo_set=(DT/T)lo_norm
Where, lo_set for the desired output current value (mA), D for the PWM signal duty cycle (%), T for the period of the PWM signal (S), lo_norm for the rated output of the driver (mA).
Caution:
The above formula is for reference only, the output current may deviate because of the different loads, the PWM signal can not be less than 0.7ms on-time limit, otherwise the product can not work properly, if you hear a slight sound from the driver when PWM dimming is a normal phenomenon, because the PWM dimming frequency in the range of human ear hearing.

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