LINEAR TECHNOLOGY LT3478IFE#PBF 电源控制器-产品快照
- 品牌:
- LINEAR TECHNOLOGY
- 型号:
- LT3478IFE#PBF
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产品介绍
LINEAR TECHNOLOGY LT3478IFE#PBF 电源控制器
LINEAR TECHNOLOGY LT3478IFE#PBF LED Driver, Boost (Step Up), 2.8-36V input, 1 Output, 2.25 MHz switch-freq., 41V/4.5 A out, TSSOP-16
LINEAR TECHNOLOGY
The LT3478IFE#PBF is a 4.5A Monolithic LED Driver designed with true colour PWM Dimming 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 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. Unique circuitry allows a PWM dimming range up to 3000:1 while maintaining constant LED colour. 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. True colour PWM™ dimming delivers constant LED colour with up to 3000:1 range 4.5A, 60mΩ, 42V Internal switch Drives LEDs in boost, buck-boost or buck modes Integrated resistors for inductor and LED current sensing Program LED current de-rating vs. temperature Separate inductor supply input Inrush current protection Programmable soft-start Fixed frequency operation from 200kHz to 2.25MHz Open LED protection (programmable OVP) Accurate shutdown/UVLO threshold with programmable hysteresis Device Topology: Boost (Step Up) No. of Outputs: 1Outputs Output Current: 4.5A Output Voltage: 41V Driver Case Style: TSSOP No. of Pins: 16Pins Input Voltage Min: 2.8V Input Voltage Max: 36V Switching Frequency: 2.25MHz Operating Temperature Min: -40°C Operating Temperature Max: 125°C Packaging: Each Product Range: - Automotive Qualifications Standard: - Dimming Control Type: PWM MSL: MSL 1 - Unlimited Input Voltage: 2.8V to 36V LED Driver Application: High Power LED Driver, Automotive Lighting SVHC: No SVHC (17-Dec-2015) Topology: Boost (Step Up) Find similar products grouped by common attribute
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