Dual 36V Step-Down LED Driver Delivers up to 1.5A/Channel
Linear Technology has announced the LT3475, a dual 36V, up to 2MHz step-down DC/DC converter designed to operate as a two-channel constant- current LED driver. Each channel has an internal sense resistor and dimming control, making it ideal for driving LEDs requiring up to 1.5A of current. One channel switches 180 degrees out-of-phase with the other, reducing input ripple. High output current accuracy is independently maintained for each channel over a wide range of 50mA to 1.5A,while unique True Color PWM circuitry allows a dimming range of 3000:1 without any of the color shift typically associated with LED current dimming.Wit
The LT3475 utilizes a high side sense, enabling a grounded LED cathode connection, eliminating the requirement for an LED return wire in most applications. It also has an integrated boost diode for each channel, further reducing the solution footprint and cost. Additional features include both open LED and short circuit protection.
Available from stock in a thermally enhanced 20-lead TSSOP package, the LT3475EFE is priced starting at $3.50 each in 1,000-piece quantities. An I Grade version, the LT3475IFE is also available from stock, with 1,000-piece pricing starting at $4.20 each.