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LT3756

Features: 3000:1 True Color PWMTM DimmingWide Input Voltage Range: 6V to 100VOutput Voltage Up to 100V Constant-Current and Constant-Voltage Regulation 100mV High Side Current Sense Drives LEDs in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology Adjustable Frequency: 100kHz to 1MHz Ope...

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SeekIC No. : 004401152 Detail

LT3756: Features: 3000:1 True Color PWMTM DimmingWide Input Voltage Range: 6V to 100VOutput Voltage Up to 100V Constant-Current and Constant-Voltage Regulation 100mV High Side Current Sense Drives LEDs in B...

LT3756 Data Sheet

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Part Number:
LT3756
Supply Ability:
5000

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

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Product Details

Description



Features:

3000:1 True Color PWMTM Dimming
Wide Input Voltage Range: 6V to 100V
Output Voltage Up to 100V
Constant-Current and Constant-Voltage Regulation
100mV High Side Current Sense
Drives LEDs in Boost, Buck Mode, Buck-Boost Mode, SEPIC or Flyback Topology
Adjustable Frequency: 100kHz to 1MHz
Open LED Protection
Programmable Undervoltage Lockout with Hysteresis
Open LED Status Pin (LT3756)
Frequency Synchronization (LT3756-1)
PWM Disconnect Switch Driver
CTRL Pin Provides Analog Dimming
Low Shutdown Current: <1A
Programmable Soft-Start
Thermally Enhanced 16-Lead QFN (3mm * 3mm) and MSOP Packages


Application

High Power LED Applications
Industrial
 Automotive


Pinout

Connection Diagram




Specifications

VIN .......................................................................100V
SHDN/UVLO ...................................... 100V, VIN + 0.3V
ISP, ISN ...............................................................100V
INTVCC ................................................. 8V, VIN + 0.3V
GATE, PWMOUT .....................................INTVCC + 0.3V
CTRL, PWM, OPENLED ...........................................12V
VC, VREF , SS, FB .....................................................3V
SYNC .......................................................................8V
RT ........................................................................1.5V
SENSE ..................................................................0.5V
Operating Junction Temperature Range
(Note 2) ............................................. 40to 125
Maximum Junction Temperature........................ 125
Storage Temperature Range ............. 65 to 125


Description

The LT®3756 and LT3756-1 are DC/DC controllers designed to operate as a constant-current source for driving high current LEDs. They drive a low side external N-channel power MOSFET from an internal regulated 7V supply. The fi xed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. A ground referenced voltage FB pin serves as the input for several LED protection features, and also makes it possible for the converter to operate as a constant-voltage source. A frequency adjust pin allows the user to program the frequency from 100kHz to 1MHz to optimize effi ciency, performance or external component size.

The LT3756/LT3756-1 sense output current at the high side of the LED string. High side current sensing is the most fl exible scheme for driving LEDs, allowing boost, buck mode or buck-boost mode confi guration. The PWM input provides LED dimming ratios of up to 3000:1, and the CTRL input provides additional analog dimming capability.

Both parts are available in the 16-lead QFN (3mm × 3mm) and MSOP packages.




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