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Datasheet Linear Technology LT3517EFE

Manufacturer:Linear Technology
Series:LT3517
Part Number:LT3517EFE

Full-Featured LED Driver with 1.5 A Switch Current

Datasheets

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    LT3517 Full-Featured LED Driver with 1.5A Switch Current FEATURES DESCRIPTION
    The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. Programmable switching frequency allows optimization of the external components for efficiency or component size. The switching frequency of LT3517 can be synchronized to an external clock signal. The LED current is externally programmable with a 100mV sense resistor. The external PWM input provides up to 5000:1 LED dimming. The CTRL pin provides further 10:1 dimming ratio. The LT3517 is available in the tiny footprint 16-lead QFN (4mm 4mm) and the 16-pin TSSOP packages. The LT3517 provides a complete solution for both constantvoltage and constant-current applications.
    L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7199560, 7321203, 7746300. 5000:1 True Color PWMTM Dimming Ratio 1.5A, 45V Internal Switch 100mV High Side Current Sense Open LED Protection Adjustable Frequency: 250kHz to 2.5MHz Wide Input Voltage Range: Operation from 3V to 30V Transient Protection to 40V Operates in Boost, Buck Mode and Buck-Boost Mode Gate Driver for PMOS LED Disconnect Constant-Current and Constant-Voltage Regulation CTRL Pin Provides 10:1 Analog Dimming Low Shutdown Current: <1A Available in (4mm 4mm) 16-Lead QFN and 16-Pin TSSOP Packages APPLICATIONS Display Backlighting Automotive and Avionic Lighting Illumination Scanners TYPICAL APPLICATION
    1A Buck Mode LED Driver
    100 PVIN 24V 100m 2.2F ISP VIN SHDN LT3517 CTRL PWM FB SS 50 40 16.9k 1MHz 0.1F
    3517 TA01a Efficiency
    10F 90 EFFICIENCY (%) CTRL = VREF 1A ISN TG SW 15H 80 70 60 VIN 3.3V 2.2F VREF PWM SYNC RT TGEN VREF VC GND 0.1F 0 20 40 60 80 PWM DUTY CYCLE (%) 100
    3517 TA01b 3517fg For more information www.linear.com/LT3517 1 LT3517 ABSOLUTE MAXIMUM RATINGS
    (Note 1) VIN, SHDN, PWM, TGEN (Note 3).40V SW, ISP ISN, TG .45V , TG Pin Below ISP Pin .10V FB, SYNC, SS, CTRL .6V VC, RT, VREF .3V Operating Junction Temperature Range (Notes 2,4) LT3517E .40C to 125C LT3517I .40C to 125C LT3517H .40C to 150C Storage Temperature Range QFN.65C to 150C TSSOP .65C to 150C Lead Temperature (Soldering ...

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Manufacturer's Classification

  • Power Management > LED Driver ICs > Step-Up (Boost) LED Drivers

Docket:
LT3517 Full-Featured LED Driver with 1.5A Switch Current FEATURES DESCRIPTION
The LT3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifically designed to drive LEDs. The LT3517 operates as a LED driver in boost, buck mode and buck-boost mode. It combines a traditional voltage loop and a unique current loop to operate as a constant-current source or constant-voltage source. Programmable switching frequency allows optimization of the external components for efficiency or component size. The switching frequency of LT3517 can be synchronized to an external clock signal. The LED current is externally programmable with a 100mV sense resistor. The external PWM input provides up to 5000:1 LED dimming. The CTRL pin provides further 10:1 dimming ratio. The LT3517 is available in the tiny footprint 16-lead QFN (4mm 4mm) and the 16-pin TSSOP packages. The LT3517 provides a complete solution for both constantvoltage and constant-current applications.
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks and True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 7199560, 7321203, 7746300. 5000:1 True Color PWMTM Dimming Ratio 1.5A, 45V Internal Switch 100mV High Side Current Sense Open LED Protection Adjustable Frequency: 250kHz to 2.5MHz Wide Input Voltage Range: Operation from 3V to 30V Transient Protection to 40V Operates in Boost, Buck Mode and Buck-Boost Mode Gate Driver for PMOS LED Disconnect Constant-Current and Constant-Voltage...

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