LT3743IUFD#PBF Linear Technology, LT3743IUFD#PBF Datasheet - Page 27

• Manufacturer Part Number: LT3743IUFD#PBF
• Description: IC LED DRVR HP CONST CURR 28QFN
• Manufacturer: Linear Technology
• Type: High Power, Constant Currentr

Specifications of LT3743IUFD#PBF

• Topology: High Side, Low Side, PWM, Step-Down (Buck)
• Number Of Outputs: 1
• Internal Driver: No
• Type - Primary: General Purpose
• Type - Secondary: RGB
• Frequency: 200kHz ~ 1MHz
• Voltage - Supply: 6 V ~ 36 V
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Operating Temperature: -40°C ~ 125°C
• Internal Switch(s): Yes
• Efficiency: 92%
• Led Driver Application: Lighting
• No. Of Outputs: 1
• Output Current: 20A
• Output Voltage: 40V
• Input Voltage: 6V To 36V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +125°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Current - Output / Channel: -

REVISION HISTORY
REV
A
B
DATE
2/10
8/10
DESCRIPTION
Revised Features and Typical Application
Updated Electrical Characteristics values
Revised values on curves G32 and G33 in the Typical Performance Characteristics section
Revised the Block Diagram
Changed value in equation and made minor text edit in the Inductor Selection section
Revised Table 4 values
Added text to Average Current Mode Control Compensation and Board Layout Considerations sections in the
Applications Information section
Revised all Typical Applications drawings
Updated Electrical Characteristics values and conditions
Revised Pin Functions
Revised Block Diagram
Changed soft-start current in Operation section
Revised units for M1 and M2 equations
Removed 0.1MHz switching frequency from Table 4
Added text to Switching Frequency Synchronization, Shutdown and UVLO sections in the Applications Information
section
Corrected M2 and M3 part numbers on Typical Applications drawings
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
LT3743
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