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LT3517

Features: 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 30VTransient Protection to 40V Operates in Boost, Buck Mode and Buck-Boost Mode Gate Dri...

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SeekIC No. : 004401120 Detail

LT3517: Features: 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...

LT3517 Data Sheet

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Part Number:
LT3517
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

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


Application

Display Backlighting
Automotive and Avionic Lighting
Illumination
Scanners


Pinout

Connection Diagram


Specifications

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 ..............................................40 to 125
LT3517I ...............................................40 to 125
LT3517H .............................................40 to 150
Storage Temperature Range
QFN .....................................................65 to 125
TSSOP ................................................65 to 150
Lead Temperature (Soldering, 10 sec)
TSSOP ..............................................................300


Description

The LT®3517 is a current mode DC/DC converter with an internal 1.5A, 45V switch specifi cally 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 effi ciency 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 the16-Pin TSSOP packages.

The LT3517 provides a complete solution for both constant-voltage and constant-current applications.




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