The LT3598 can drive up to six strings of LEDs, each with up to ten 30mA white LEDs in series while delivering efficiencies up to 90%.
Its multichannel capability makes it suitable for medium sized TFT-LCD backlighting applications. It offers an input voltage range of 3V to 30V for automotive and industrial applications. It delivers 1.5% LED current matching to insure uniform brightness of the display. Dimming ratios as high as 3,000:1 can be attained by using True Color PWM dimming. A programmable 200-kHz to 2.5-MHz fixed frequency operation and current mode architecture offers stable operation over a wide range of supply and output voltages while minimizing the size of the external components.
The LT3598EUF is available from stock in a thermally enhanced 24-lead 4mm x 4mm QFN package, 1,000-piece pricing starts at $2.95 each. An industrial grade version, the LT3598IUF is tested and guaranteed to operate from a -40°C to 125°C operating junction temperature and is priced at $3.39 in 1,000-piece quantities.
Datasheet: Click here.
Linear Technology, www.linear.com