LED torch using NSI45090JDT4G constant current regulator


Posted on Feb 7, 2014

A very simple LED torch can be designed using the NSI45090JDT4G adjustable constant current regulator (CCR) designed by ON Semiconductor, using extreme few external components. NSI45090JDT4G device is designed to provide a cost effective solution for regulating current in LEDs. This Constant current regulator is based on patent-pending Self-Biase


LED torch using NSI45090JDT4G constant current regulator
Click here to download the full size of the above Circuit.

d Transistor (SBT) technology and regulates current over a wide voltage range. It is designed with a negative temperature coefficient to protect LEDs from thermal runaway at extreme voltages and currents. The Radj pin allows Ireg(SS) to be adjusted to higher currents by attaching a resistor between Radj (Pin 3) and the Cathode (Pin 4). The Radj pin can also be left open (No Connect) if no adjustment is required.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Ponyprog for AVR & PIC16F84
    "Automatic" Light Bulb Changer
    Motion Detector with PIR Sensor
    A single pulse signal generating circuit



    Top