| Part No.： | LT3478-1 |
| Page： | 24 Pages |
| Size： | 235 KB |
| Manufacturer： | Linear Technology |
| Logo： |  |
| Views： | 1 |
| Update Time： | 2023-12-07 11:22:25 |
| DataSheet： | Download |
| Part No. | Packing | SPQ | Marking | MSL | Pins | Temp Range | Package Description | Buy |
| LT3478EFE-1#PBF | Tube | 95 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP | |
| LT3478EFE-1#TRPBF | Reel | 2500 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP | |
| LT3478EFE-1#TRMPBF | Reel | 500 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP | |
| LT3478IFE-1#PBF | Tube | 95 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP | |
| LT3478IFE-1#TRPBF | Reel | 2500 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP | |
| LT3478IFE-1#TRMPBF | Reel | 500 | 3478FE-1 | 1 | 16 | -40°C ~ 125°C | 16-Lead TSSOP |
The 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. 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 LT3478-1 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.
