Overview
The LT3744EUHE#PBF, produced by Analog Devices Inc., is a fixed frequency synchronous step-down DC/DC controller. It is specifically designed to drive LED loads with high current capabilities, supporting up to 20A continuous or 40A pulsed current. This controller is ideal for applications requiring precise and efficient LED current regulation.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage Range | 3.3 | 36 | V | |
| Quiescent Current (Non-Switching Operation) | 2.2 | 5.2 | μA | |
| Quiescent Current (Shutdown Mode) | 4.8 | 5.2 | μA | |
| Feedback Regulation Voltage | 1.169 | 1.205 | 1.241 | V |
| Lower Fault Falling VFB Threshold | 240 | 250 | 260 | mV |
| Upper Fault Rising VFB Threshold | 1.06 | 1.100 | 1.14 | V |
| Storage Temperature Range | –65 | 150 | °C | |
| Operating Temperature Range | –40 | 125 | °C |
Key Features
- High Current Capability: Supports up to 20A continuous or 40A pulsed current for LED loads.
- Fixed Frequency Operation: Ensures stable and efficient operation.
- Precision Current Regulation: Accurate regulation of LED current with feedback mechanisms.
- Fault Protection: Includes lower and upper fault thresholds with hysteresis for robust operation.
- Low Quiescent Current: Minimizes power consumption in non-switching and shutdown modes.
- Wide Input Voltage Range: Operates from 3.3V to 36V, making it versatile for various applications.
Applications
- LED Lighting Systems: Suitable for high-power LED lighting applications, including automotive, industrial, and commercial lighting.
- Display and Signage: Ideal for LED display panels and signage where high current and precision are required.
- Automotive Systems: Can be used in automotive LED lighting systems due to its robust fault protection and wide operating temperature range.
- Industrial Control Systems: Applicable in industrial settings where reliable and efficient LED control is necessary.
Q & A
- What is the maximum continuous current the LT3744EUHE#PBF can handle?
The LT3744EUHE#PBF can handle up to 20A continuous current.
- What is the input voltage range of the LT3744EUHE#PBF?
The input voltage range is from 3.3V to 36V.
- What is the operating temperature range of the LT3744EUHE#PBF?
The operating temperature range is from –40°C to 125°C.
- Does the LT3744EUHE#PBF have fault protection features?
Yes, it includes lower and upper fault thresholds with hysteresis for robust operation.
- What is the quiescent current in non-switching operation?
The quiescent current in non-switching operation is typically 2.2μA.
- Can the LT3744EUHE#PBF be used in automotive applications?
Yes, it is suitable for automotive LED lighting systems due to its robust fault protection and wide operating temperature range.
- What is the feedback regulation voltage of the LT3744EUHE#PBF?
The feedback regulation voltage is typically 1.205V.
- How many pins does the LT3744EUHE#PBF have?
The LT3744EUHE#PBF has 36 pins in a 5mm × 6mm Plastic QFN package.
- Is the LT3744EUHE#PBF lead-free?
Yes, the LT3744EUHE#PBF is available in a lead-free finish.
- What is the storage temperature range of the LT3744EUHE#PBF?
The storage temperature range is from –65°C to 150°C.
