LT3743EUFD#PBF
ActiveHIGH CURRENT SYNCHRONOUS STEP-DOWN LED DRIVER WITH THREE-STATE CONTROL
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LT3743EUFD#PBF
ActiveHIGH CURRENT SYNCHRONOUS STEP-DOWN LED DRIVER WITH THREE-STATE CONTROL
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LT3743EUFD#PBF |
|---|---|
| Applications | Lighting |
| Dimming | PWM |
| Frequency [Max] | 1 MHz |
| Frequency [Min] | 200 kHz |
| Internal Switch(s) | False |
| Mounting Type | Surface Mount |
| Number of Outputs | 1 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 28-WFQFN Exposed Pad |
| Supplier Device Package | 28-QFN (4x5) |
| Topology | Step-Down (Buck) |
| Type | DC DC Controller |
| Voltage - Supply (Max) [Max] | 36 V |
| Voltage - Supply (Min) [Min] | 6 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tube | 1 | $ 14.82 | |
| 10 | $ 10.56 | |||
| 25 | $ 9.47 | |||
| 100 | $ 8.25 | |||
| 250 | $ 7.65 | |||
| 500 | $ 7.29 | |||
| 1000 | $ 7.15 | |||
Description
General part information
LT3743 Series
The LT3743 is a fixed frequency synchronous step-down DC/DC controller designed to drive high current LEDs. The average current mode controller will maintain inductor current regulation over a wide output voltage range of 0V to (VIN– 2V). LED dimming is achieved through analog dimming on the CTRL_L, CTRL_H and CTRL_T pins and with PWM dimming on the PWM and CTRL_SEL pins. Through the use of externally switched load capacitors, the LT3743 is capable of changing regulated LED current levels within several μs, providing accurate, high speed PWM dimming between two current levels. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin.Additional features include voltage regulation and overvoltage protection set with a voltage divider from the output to the FB pin. Overcurrent protection is provided and set by the CTRL_H pin.ApplicationsDLP ProjectorsHigh Power Architectural LightingLaser Diodes
Documents
Technical documentation and resources