TL2842BD-8

Product Overview

Category

TL2842BD-8 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in power management applications.

Characteristics

• TL2842BD-8 is a high-performance voltage mode PWM controller.
• It operates at a fixed frequency of 250 kHz.
• The device features an error amplifier, precision reference, oscillator, and a PWM comparator with a built-in dead-time control.
• TL2842BD-8 offers excellent line and load regulation, as well as high efficiency.

Package

The TL2842BD-8 comes in a standard SOIC-8 package.

Essence

The essence of TL2842BD-8 lies in its ability to regulate and control power efficiently in various applications.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Input Voltage Range: 7V to 40V
• Output Voltage Range: 5V to 36V
• Maximum Duty Cycle: 100%
• Operating Temperature Range: -40°C to +85°C
• Output Current: Up to 1A

Detailed Pin Configuration

The TL2842BD-8 has the following pin configuration:

1. VCC: Power supply input
2. COMP: Error amplifier output
3. FB: Feedback input for regulating the output voltage
4. GND: Ground reference
5. RT: Timing resistor connection for setting the oscillator frequency
6. CT: Timing capacitor connection for setting the oscillator frequency
7. OUT: Power switch output
8. SS/TR: Soft-start/Shutdown control input

Functional Features

• TL2842BD-8 provides precise voltage regulation through its error amplifier and feedback mechanism.
• The built-in oscillator generates a fixed frequency PWM signal for controlling the power switch.
• The device incorporates dead-time control to prevent shoot-through current in the power switch.
• TL2842BD-8 offers soft-start and shutdown control for smooth power-up and power-down sequences.

Advantages and Disadvantages

Advantages

• High-performance voltage mode PWM controller
• Excellent line and load regulation
• High efficiency
• Precise voltage regulation
• Dead-time control for shoot-through prevention
• Soft-start and shutdown control

Disadvantages

• Limited output current capacity (up to 1A)

Working Principles

TL2842BD-8 operates based on the voltage mode control technique. It compares the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal. By controlling the duty cycle, the output voltage is regulated. The built-in oscillator provides a fixed frequency PWM signal, which drives the power switch. Dead-time control ensures that there is no overlap between the high-side and low-side switches, preventing shoot-through current.

Detailed Application Field Plans

TL2842BD-8 finds applications in various power management systems, including but not limited to: - Switching power supplies - DC-DC converters - LED drivers - Battery chargers - Industrial control systems

Detailed and Complete Alternative Models

Some alternative models to TL2842BD-8 include: - TL494: A similar voltage mode PWM controller with higher output current capacity. - UC3842: Another popular PWM controller with similar features and characteristics. - SG3525: A versatile PWM controller suitable for various power electronics applications.

These alternative models can be considered based on specific requirements and design constraints.

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