LT3496EUFD#TRPBF

Product Overview

• Category: Integrated Circuit (IC)
• Use: LED Driver
• Characteristics:
  • High efficiency
  • Wide input voltage range
  • Dimming capability
  • Compact package
• Package: 28-Lead QFN
• Essence: Power management IC for driving LEDs
• Packaging/Quantity: Tape & Reel, 2500 units per reel

Specifications

• Input Voltage Range: 3V to 30V
• Output Current: Up to 1.5A
• Switching Frequency: Adjustable up to 2MHz
• Dimming Control: Analog/PWM
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3496EUFD#TRPBF has a total of 28 pins. The pin configuration is as follows:

1. VIN: Input voltage
2. GND: Ground
3. SW: Switch node connection
4. FB: Feedback pin for regulating output voltage
5. VOUT: Output voltage
6. CTRL: Dimming control input
7. ADJ: Adjust pin for setting the reference voltage
8. EN: Enable pin for turning on/off the device
9. PGND: Power ground
10. LX: Inductor connection
11. BST: Boost capacitor connection
12. SS: Soft-start capacitor connection
13. RT: External resistor for setting switching frequency
14. COMP: Compensation pin for loop stability
15. VCC: Supply voltage for internal circuitry 16-28. NC: No connect pins

Functional Features

• High efficiency synchronous step-up LED driver
• Wide input voltage range allows operation from various power sources
• Dimming capability enables brightness control
• Adjustable switching frequency for optimization
• Integrated power switch and compensation circuitry
• Internal soft-start reduces inrush current during startup

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power consumption - Wide input voltage range allows versatile applications - Dimming capability provides flexibility in lighting control - Compact package saves board space - Integrated power switch simplifies design

Disadvantages: - Limited output current of up to 1.5A may not be suitable for high-power LED applications - Operating temperature range may restrict usage in extreme environments

Working Principles

The LT3496EUFD#TRPBF is a synchronous step-up LED driver that efficiently drives LEDs from a wide input voltage range. It utilizes a boost converter topology to regulate the output voltage and current. The device incorporates a high-side N-channel power switch and a low-side P-channel synchronous rectifier, ensuring minimal power loss.

The dimming control can be achieved through either an analog or PWM signal applied to the CTRL pin. This allows for precise brightness adjustment according to the application requirements.

The LT3496EUFD#TRPBF also features an adjustable switching frequency, which can be set using an external resistor connected to the RT pin. This enables optimization of efficiency and component size.

Detailed Application Field Plans

The LT3496EUFD#TRPBF is widely used in various applications requiring LED driving. Some of the common application fields include:

1. General lighting:

   • Residential and commercial lighting fixtures
   • Task lighting
   • Architectural lighting

2. Automotive lighting:

   • Interior and exterior lighting
   • Dashboard illumination
   • Headlights and taillights

3. Display backlighting:

   • LCD monitors and TVs
   • Mobile devices (smartphones, tablets)
   • Signage and advertising displays

4. Industrial lighting:

   • Warehouse and factory lighting
   • Streetlights and outdoor area lighting
   • Emergency lighting systems

Detailed and Complete Alternative Models

1. LT3496EUF#TRPBF: Similar to LT3496EUFD#TRPBF, but in a 28-Lead TSSOP package.
2. LT3496HMS#PBF: Higher power version with an output current of up to 3A.
3. LT3496AIMS#TRPBF: Adjustable switching frequency version for further optimization.

These alternative models offer similar functionality and can be considered based on specific design requirements.

In conclusion, the LT3496EUFD#TRPBF is a highly efficient LED driver IC suitable for a wide range of applications. Its compact package, dimming capability, and adjustable features make it a versatile choice for various lighting solutions. However, designers should consider the limited output current and operating temperature range when selecting this device for their specific application.