LT3478 - 4.5A Monolithic LED Drivers With True Color PWM Dimming

The LT3478 LT3478-1 are 4.5A Step-up DC/DC converters designed to drive LEDs with a constant current over a wide programmable range. Series connection of the LEDs provides identical LED currents for uniform brightness without the need for ballast resistors and expensive factory calibration. The LT3478-1 reduces external component count and cost by integrating the LED Current Sense resistor. The LT3478 uses an external sense resistor to extend the maximum programmable LED current beyond 1A and also to achieve greater accuracy when programming low LED currents. Operating frequency CAN be set with an external resistor from 200kHz up to 2.25MHz. Unique circuitry allows a PWM dimming range up to 3000:1 while maintaining constant LED color. The LT3478 LT3478-1 are ideal for high power LED Driver applications such as automotive TFT LCD backlights, courtesy lighting and heads-up Displays One of two CTRL pins CAN be used to program maximum LED current. The other CTRL pin CAN be used to program a reduction in maximum LED current vs temperature to maximize LED usage and improve reliability.
Additional features include inrush current protection, programmable open LED protection and programmable soft-start. Each part is available in a 16-pin thermally enhanced TSSOP Package.
By Linear Technology Corporation
LT3478 's PackagesLT3478 's pdf datasheet
LT3478EFE-PBF TSSOP
LT3478EFE-TRPBF TSSOP
LT3478EFE-1-PBF TSSOP
LT3478EFE-1-TRPBF TSSOP
LT3478IFE-PBF TSSOP
LT3478IFE-TRPBF TSSOP
LT3478IFE-1-PBF TSSOP
LT3478IFE-1-TRPBF TSSOP




LT3478 Pinout, Pinouts
LT3478 pinout,Pin out
This is one package pinout of LT3478,If you need more pinouts please download LT3478's pdf datasheet.

LT3478 Application circuits
LT3478 circuits
This is one application circuit of LT3478,If you need more circuits,please download LT3478's pdf datasheet.


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