LT3590: 48V Buck Mode LED Driver in SC70 and 2mm × 2mm DFN Data Sheet8/20/2007231K
Features and Benefits
- 4.5V to 55V Input Voltage Range
- Up to 50mA LED Current
- 80mA, 55V Switch
- Internal Schottky Diode
- 15µA Supply Current in Shutdown
- 500µA Supply Current Operating, Not Switching
- Switching Frequency: 850kHz
- 200mV Feedback Voltage with ±5% Accuracy
- CTRL Input Performs Dimming and Shutdown
- 91% Efficiency (10 LEDs, 50mA)
- Requires Only 1µF Output Capacitor
- 8-Lead SC70 Package
- 6-Lead 2mm × 2mm DFN Package
The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series from a 48V DC source. Series connection of the LEDs provides identical LED currents of up to 50mA, resulting in uniform brightness and eliminating the need for ballast resistors. A fixed frequency, current mode architecture results in stable operation over a wide range of input voltage and output voltage.
The high switching frequency of 850kHz permits the use of tiny, low profile inductors and capacitors. A single pin performs both shutdown and accurate LED dimming control. The power switch, Schottky diode and control circuitry are all contained inside a space saving SC70 package or 2mm × 2mm DFN package to allow a small converter footprint and lower parts cost.
- LED Fixed Signage
- Traffic Signs
- Neon Sign Replacement
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 1166 is a 48V Buck-Mode LED Driver featuring the LT3590. The LT3590 is a fixed frequency buck mode converter specifically designed to drive up to 10 LEDs in series at up to 50mA LED current. Series connection of the LEDs results in uniform LED brightness, eliminating the need for ballast resistors. The demo board targets 48V power applications but has a wide 4.5V to 54V (55V absolute max) input voltage range.
Documentation & Resources
R518 Reliability Data3/26/201834 K
DC1166A - Demo Manual9/28/2016430K
Efficient 48V Buck Mode LED Driver Delivers 50mA1/1/2008 LT Journal
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|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT3590EDC#TRMPBF||Material Declaration||Reliability Data||6-Lead DFN (2mm x 2mm w/ EP)|
|LT3590EDC#TRPBF||Material Declaration||Reliability Data||6-Lead DFN (2mm x 2mm w/ EP)|
|LT3590ESC8#TRMPBF||Material Declaration||Reliability Data||8-Lead SC70|
|LT3590ESC8#TRPBF||Material Declaration||Reliability Data||8-Lead SC70|
|Wafer Fabrication Data||R518 Reliability Data|
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