LT3479EDE

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High Efficiency, Step-Up DC/DC Converter
• Package: 16-Lead Plastic TSSOP
• Essence: LT3479EDE is a versatile step-up DC/DC converter designed to efficiently drive up to 10 white LEDs in series. It provides a compact and cost-effective solution for backlighting applications in portable devices such as smartphones, tablets, and handheld gaming consoles.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Input Voltage Range: 2.7V to 16V
• Output Voltage Range: Up to 34V
• Maximum Output Current: 30mA
• Switching Frequency: 1MHz
• Dimming Control: PWM or Analog
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The LT3479EDE package consists of 16 pins arranged as follows:

1. VIN: Input voltage pin
2. SW: Switch node connection
3. GND: Ground reference
4. FB: Feedback pin for regulating output voltage
5. CTRL: Dimming control input
6. EN: Enable pin for turning the device on/off
7. VOUT: Output voltage pin
8. NC: No connection
9. NC: No connection
10. NC: No connection
11. NC: No connection
12. NC: No connection
13. NC: No connection
14. NC: No connection
15. NC: No connection
16. NC: No connection

Functional Features

• High efficiency step-up DC/DC converter
• Drives up to 10 white LEDs in series
• Wide input voltage range allows for versatile applications
• PWM or analog dimming control for brightness adjustment
• Internal soft-start and current limit protection
• Low shutdown current for power-saving operation

Advantages and Disadvantages

Advantages: - High efficiency results in longer battery life - Compact size and cost-effective solution - Versatile input voltage range allows for various applications - Dimming control provides flexibility in brightness adjustment - Built-in protection features ensure safe operation

Disadvantages: - Limited maximum output current may not be suitable for high-power applications - Requires external components for proper operation

Working Principles

The LT3479EDE is a step-up DC/DC converter that utilizes a high-frequency switching regulator to efficiently boost the input voltage to a higher output voltage. It employs a constant frequency, current mode architecture to regulate the output voltage and drive the connected LEDs.

When enabled, the internal switch connects the input voltage to the inductor, storing energy in its magnetic field. The energy is then transferred to the output through the diode and the connected LEDs. The feedback pin monitors the output voltage and adjusts the duty cycle of the internal switch to maintain a stable output.

The dimming control input allows for adjusting the brightness of the LEDs either through pulse width modulation (PWM) or an analog signal. This feature enables dynamic control of the backlight intensity.

Detailed Application Field Plans

The LT3479EDE is primarily designed for backlighting applications in portable devices such as smartphones, tablets, and handheld gaming consoles. It can efficiently drive up to 10 white LEDs in series, providing uniform and adjustable backlighting for displays.

Other potential application fields include: - Automotive interior lighting - LCD monitors and TVs - Industrial control panels - Medical equipment - Signage and advertising displays

Detailed and Complete Alternative Models

1. LT3479EFE: Similar specifications and features, but available in a 16-Lead Plastic TSSOP package.
2. LT3479IFE: Improved efficiency and wider input voltage range, available in a 16-Lead Plastic TSSOP package.
3. LT3479HFE: Higher maximum output current, suitable for high-power applications, available in a 16-Lead Plastic TSSOP package.

These alternative models offer similar functionality with slight variations in specifications to cater to different application requirements.

Word count: 511 words