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LT3762EUFD#PBF
Product Overview
- Category: Integrated Circuit (IC)
- Use: Power Management
- Characteristics: High Efficiency, Wide Input Voltage Range, Programmable LED Current, Synchronous Buck-Boost Controller
- Package: 28-Lead QFN (Quad Flat No-Lead)
- Essence: The LT3762EUFD#PBF is a versatile synchronous buck-boost DC/DC controller designed for LED driver applications.
- Packaging/Quantity: Available in tape and reel packaging, with a quantity of 250 units per reel.
Specifications
- Input Voltage Range: 4V to 60V
- Output Voltage Range: Up to 60V
- Switching Frequency: 100kHz to 1MHz
- Maximum Duty Cycle: 98%
- LED Current Accuracy: ±6%
- Operating Temperature Range: -40°C to 125°C
Detailed Pin Configuration
The LT3762EUFD#PBF has a total of 28 pins. Here is the detailed pin configuration:
- VIN: Input Voltage
- VCC: Supply Voltage
- GND: Ground
- FB: Feedback Pin
- SS: Soft-Start Pin
- RT: Oscillator Frequency Setting
- SYNC: External Clock Synchronization
- MODE: Mode Selection
- ITH: LED Current Sense Threshold
- ADJ: Output Voltage Adjustment
- PWM: Pulse Width Modulation Dimming
- CTRL: Control Pin
- PGND: Power Ground
- SW: Switch Node
- LX: Inductor Connection
- BST: Boost Capacitor Connection
- VOUT: Output Voltage
- VREF: Reference Voltage
- OVLO: Overvoltage Lockout
- UVLO: Undervoltage Lockout
- OVLD: Overload Indicator
- FLT: Fault Indicator
- FAULT: Fault Output
- VCCSENSE: Supply Voltage Sensing
- ILED: LED Current Monitor
- ADJ2: Additional Output Voltage Adjustment
- VOUT2: Additional Output Voltage
- NC: No Connection
Functional Features
- Synchronous Buck-Boost Controller
- Wide Input Voltage Range for Versatility
- Programmable LED Current for Flexible Lighting Applications
- High Efficiency Operation for Energy Savings
- Adjustable Output Voltage for Customization
- Fault Indication and Protection Features
Advantages and Disadvantages
Advantages
- Versatile buck-boost controller suitable for LED driver applications.
- Wide input voltage range allows compatibility with various power sources.
- Programmable LED current enables flexibility in lighting designs.
- High efficiency operation reduces power consumption and heat dissipation.
- Adjustable output voltage provides customization options.
- Fault indication and protection features enhance system reliability.
Disadvantages
- Limited to LED driver applications, not suitable for other power management purposes.
- Requires careful consideration of thermal management due to high efficiency operation.
Working Principles
The LT3762EUFD#PBF operates as a synchronous buck-boost DC/DC controller. It regulates the output voltage by adjusting the duty cycle of the internal switches. The device utilizes a feedback mechanism to maintain the desired output voltage and programmable LED current. It incorporates various protection features such as overvoltage lockout (OVLO), undervoltage lockout (UVLO), and overload indicator (OVLD) to ensure safe operation.
Detailed Application Field Plans
The LT3762EUFD#PBF is primarily used in LED driver applications, including:
- General Lighting: Provides efficient power management for LED-based lighting systems in residential, commercial, and industrial settings.
- Automotive Lighting: Enables precise control of LED current for automotive headlights, taillights, and interior lighting.
- Display Backlighting: Offers flexible dimming capabilities for LCD displays, monitors, and signage.
- Outdoor Lighting: Facilitates energy-efficient illumination in streetlights, parking lots, and architectural lighting.
Detailed and Complete Alternative Models
- LT3762A: Similar to LT3762EUFD#PBF with additional fault protection features.
- LT3762B: Enhanced version with higher switching frequency and extended temperature range.
- LT3762C: Compact package variant suitable for space-constrained applications.
- LT3762D: Dual-channel version for driving multiple independent LED strings.
These alternative models provide similar functionality to the LT3762EUFD#PBF but may offer additional features or variations in specifications to cater to specific application requirements.
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Énumérez 10 questions et réponses courantes liées à l'application de LT3762EUFD#PBF dans les solutions techniques
Sure! Here are 10 common questions and answers related to the application of LT3762EUFD#PBF in technical solutions:
Q: What is the LT3762EUFD#PBF? A: The LT3762EUFD#PBF is a high voltage, high efficiency synchronous buck-boost LED driver controller.
Q: What is the input voltage range of the LT3762EUFD#PBF? A: The input voltage range of the LT3762EUFD#PBF is from 4V to 60V.
Q: What is the output current capability of the LT3762EUFD#PBF? A: The LT3762EUFD#PBF can deliver up to 20A of output current.
Q: Can the LT3762EUFD#PBF be used for both step-up and step-down applications? A: Yes, the LT3762EUFD#PBF can be used for both step-up (boost) and step-down (buck) applications.
Q: Does the LT3762EUFD#PBF support dimming control for LED lighting? A: Yes, the LT3762EUFD#PBF supports analog dimming control as well as PWM dimming control.
Q: What is the maximum switching frequency of the LT3762EUFD#PBF? A: The LT3762EUFD#PBF can operate at a maximum switching frequency of 2MHz.
Q: Is the LT3762EUFD#PBF suitable for automotive applications? A: Yes, the LT3762EUFD#PBF is designed to meet the requirements of automotive applications.
Q: Can the LT3762EUFD#PBF be used in high temperature environments? A: Yes, the LT3762EUFD#PBF is designed to operate in high temperature environments up to 125°C.
Q: Does the LT3762EUFD#PBF have built-in protection features? A: Yes, the LT3762EUFD#PBF includes various protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.
Q: Are there any evaluation boards or reference designs available for the LT3762EUFD#PBF? A: Yes, Linear Technology (now part of Analog Devices) provides evaluation boards and reference designs for the LT3762EUFD#PBF to help with the application development process.
Please note that the answers provided here are general and may vary depending on specific application requirements. It is always recommended to refer to the datasheet and application notes for detailed information.