Linear Technology LT3497
The LT3497 features a unique high side LED current sense that enables the part to function as a “one wire current source;” one side of the LED string can be returned to ground anywhere, allowing a simpler 1-wire LED connection. The 2.3MHz switching frequency allows the use of tiny inductors and capacitors. With such a high level of integration, the LT3497 provides a high efficiency dual white LED driver solution in the smallest of spaces.| Part No. | LT3497 |
|---|---|
| Datasheet | LT3497 Download |
| Manufacturer |  Linear Technology |
| Description | Dual Full Function White LED Driver |
| Buy | Stock & Price |
FEATURES
● Drives Up to 12 White LEDs (6 in Series per Converter) from a 3V Supply● Two Independent Boost Converters Capable of Driving Asymmetric LED Strings
● Independent Dimming and Shutdown Control of the Two LED Strings
● High Side Sense Allows “One Wire Current Source” per Converter
● Internal Schottky Diodes
● Open LED Protection (32V)
● 2.3MHz Switching Frequency
● ±5% Reference Accuracy
● VIN Range: 2.5V to 10V
● Dual Wide 250:1 True Color PWMTM Dimming
● Requires Only 1µF Output Capacitor per Converter
● Available in a 3mm × 2mm 10-Pin DFN Package
APPLICATIONS
● Cellular Phones● PDAs, Handheld Computers
● Digital Cameras
● MP3 Players
● GPS Receivers LT3497 Dual Full Function White LED Driver with Integrated Schottky Diodes
DESCRIPTION
The LT®3497 is a dual full function step-up DC/DC converter specifically designed to drive up to 12 white LEDs (6 white LEDs in series per converter) from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors and expensive factory calibration.
