1.5V battery powers white-LED driver


Posted on May 18, 2012

Although white LEDs are common in a variety of lighting applications, their 3 to 4V forward-voltage drop makes low-voltage applications challenging. Charge pumps and other ICs are available for driving white LEDs, but they generally don`t work with the low supply voltage of 1.5V in single-cell-battery applications. The low-voltage circuit of Figure 1 provides a current-regulated output suitable for driving white LEDs. The boost converter, IC1, can supply load currents to 62 mA with input voltages as low as 1.2V, making it suitable for use with a 1.5V, single-cell battery.


1.5V battery powers white-LED driver
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Monostable circuit
Pulse-Width Modulator
Strobe Light circuit
Analog and digital electronic thermometer with LM35
15dB UHF Antenna Preamp Circuit
Transistor act as a switch
Radio Jammer
Metal detector 8



Top