LED Driver Exhibits High Efficiency

Flaunted as the industry's first 125 mA, charge pump designed for driving multiple white LEDs, the LTC3202 employs fractional 2/3, charge-pump topology switching at a fixed frequency of 1.5 MHz. This approach is said to enable efficiencies in excess of 67%. The device requires just two 0.22 µF capacitors and two 1 µF flying capacitors to construct a complete LED driver circuit. An internal two-bit d/a converter provides dimming control and shutdown quiescent current is less than 1 µA. available in a 10-lead MSOP, price is $1.90 each/1,000. LINEAR TECHNOLOGY CORP., Milpitas, CA. (408) 432-1900.