This white LED driver electronic project circuit is designed using the MAX1573 integrated circuit , manufactured by Maxim Semiconductor.
This white led driver circuit circuit drives as many as four white LEDs in parallel from a 3.3V source, and adjusts the total LED current from 1mA to 106mA, in 64 steps of 1dB each .
The LT3754 16 channel LED driver with a step-up DC DC controller designed by Linear Technology is capable of driving up to 45V of LEDs. Each channel of the LT3754 led driver contains an accurate current sink with ±2.8% current matching.
If are used high current Leds channels can be paralleled .
A very simple LED torch circuit 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.