Overview
The LT3761EMSE#TRPBF, produced by Analog Devices Inc., is a versatile DC/DC controller designed to operate as both a constant-current source and a constant-voltage regulator. This device is particularly suited for LED driver applications, offering a range of topologies including Boost, Buck, Buck-Boost, Flyback, and SEPIC configurations. It features programmable parameters, high accuracy, and robust protection mechanisms, making it an ideal choice for various power management needs.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Input Voltage (VIN) | 4.5 | - | 60 | V |
| Operating Frequency | 100 kHz | - | 1 MHz | - |
| Output Voltage | - | - | 100 | V |
| INTVCC Undervoltage Lockout | 3.9 | 4.1 | 4.4 | V |
| INTVCC Current Limit | 30 | 36 | 42 | mA |
| Shutdown Current | - | - | 13 | µA |
| Operating Temperature Range | -40°C | - | 125°C | - |
Key Features
- Programmable switching frequency from 100 kHz to 1 MHz
- Supports multiple topologies: Boost, SEPIC, Inverting, Buck, Buck-Boost, and Flyback
- Accurate current and voltage regulation with ±2% accuracy
- Open LED protection and output short-circuit protection
- Adjustable undervoltage lockout (UVLO) with hysteresis
- Low shutdown current of less than 1 µA
- Thermally enhanced 16-lead MSOP package
- Frequency synchronization (LT3761-1 version)
- High voltage LED strings support with grounded anode LEDs
Applications
The LT3761EMSE#TRPBF is suitable for a wide range of applications, including:
- LED lighting systems, especially those requiring high voltage and current accuracy
- General-purpose DC/DC conversion in industrial and automotive systems
- Battery chargers and power supplies requiring C/10 indication
- Display and backlighting systems in consumer electronics
- Energy harvesting and renewable energy systems
Q & A
- What is the maximum input voltage for the LT3761EMSE#TRPBF?
The maximum input voltage is 60 V. - What are the supported topologies for this DC/DC controller?
The supported topologies include Boost, SEPIC, Inverting, Buck, Buck-Boost, and Flyback. - What is the range of the programmable switching frequency?
The switching frequency can be programmed from 100 kHz to 1 MHz. - Does the LT3761EMSE#TRPBF have overtemperature protection?
Yes, it includes overtemperature protection to safeguard the device during momentary overload conditions. - What is the typical shutdown current of the LT3761EMSE#TRPBF?
The typical shutdown current is less than 1 µA. - What package type is the LT3761EMSE#TRPBF available in?
It is available in a thermally enhanced 16-lead MSOP package. - Does the LT3761EMSE#TRPBF support frequency synchronization?
Yes, the LT3761-1 version supports frequency synchronization. - What is the operating temperature range for the LT3761EMSE#TRPBF?
The operating temperature range is from -40°C to 125°C. - Does the LT3761EMSE#TRPBF have open LED protection?
Yes, it includes open LED protection and output short-circuit protection. - What is the accuracy of the current and voltage regulation?
The accuracy is ±2% for both current and voltage regulation.
