UC2842AD8

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UC2842AD8

+BOM

IC PWM BOOST FLYBACK CM 8SOIC

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Specifications

Attribute Value
Series UCx84xA
Part Status Obsolete
Applications PWM Controller
Voltage - Input -0.3V ~ 6.3V
Voltage - Supply 10V ~ 30V
Supply Current 11 mA
Operating Temperature -40°C ~ 85°C (TA)
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Base Product Number UC2842

Overview

Description

The UC2842AD8 is a high-performance, fixed-frequency current-mode PWM (Pulse Width Modulation) controller designed for use in switching power supplies and DC-DC converters. It features a wide input voltage range, typically from 10V to 30V, making it suitable for various applications including telecom and industrial power supplies.
Key features include an adjustable output voltage, soft-start capability to minimize inrush current, and comprehensive protection functions such as overvoltage, undervoltage, and thermal shutdown. The UC2842AD8 operates with a programmable frequency, allowing users to optimize power conversion efficiency and minimize electromagnetic interference.
Its current-mode control enhances transient response and simplifies loop compensation, while a built-in voltage reference ensures stable operation. The device is available in an 8-pin DIP package, facilitating easy integration into circuit designs. Overall, the UC2842AD8 is a robust and versatile choice for designers seeking efficient and reliable power management solutions.

Equivalent

The UC2842AD8 is a current-mode PWM controller. Equivalent products include the LM5118, TL5001, and the SG6841. Other alternatives include the LM2596 for applications requiring a voltage regulator. Always consider specifications like input voltage range, output current, and switching frequency when selecting an equivalent.

Features

The UC2842AD8 is a high-performance current mode PWM (Pulse Width Modulation) controller designed for power supply applications. Key features include:
1. Voltage Range: Operates from a wide input voltage range of 10V to 30V.
2. Current Mode Control: Provides improved transient response and inherent current limiting.
3. High Switching Frequency: Capable of operating at frequencies up to 500 kHz, enabling smaller inductors and capacitors.
4. Difficult Load Handling: Features a built-in soft-start to limit inrush current and improve startup behavior.
5. Protection Features: Includes over-voltage protection, under-voltage lockout, and thermal shutdown capabilities.
6. Integrated Circuitry: Combines a high-speed comparator, a precision reference, and a totem-pole output stage for driving external MOSFETs.
7. Applications: Ideal for off-line converters, DC-DC converters, and other power management systems.
Overall, the UC2842AD8 is suitable for efficient and reliable power supply designs in various electronic applications.

Pinout

The UC2842AD8 is an integrated circuit designed for power management applications, specifically as a current-mode PWM (Pulse Width Modulation) controller. It features an 8-pin dual in-line package (DIP) configuration.
Pin Count and Functions:
1. Pin 1 (COMP): Compensation pin for error amplifier.
2. Pin 2 (CS): Current sense input; provides feedback for current limiting.
3. Pin 3 (RAMP): Ramp input for PWM control.
4. Pin 4 (GND): Ground reference.
5. Pin 5 (VC): Voltage control input for PWM.
6. Pin 6 (VCC): Supply voltage input.
7. Pin 7 (OUT): Output pin for driving a power switch.
8. Pin 8 (REF): Reference voltage output, typically 5V.
This IC is commonly used in switch-mode power supplies and offers features like internal frequency compensation and low startup current.

Manufacturer

The UC2842AD8 is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, with a strong focus on analog and embedded processing solutions. Founded in 1930, TI has established itself as a leader in the electronics industry, known for innovations in microcontrollers, digital signal processors, and various types of analog devices. The company serves diverse markets, including automotive, industrial, communications, and personal electronics. Texas Instruments emphasizes research and development, contributing significantly to advancements in technology while maintaining a commitment to sustainability and corporate social responsibility.

Application

The UC2842AD8 is a high-performance current-mode PWM controller commonly used in switch-mode power supplies (SMPS) for applications like AC-DC converters, DC-DC converters, and battery chargers. Its features include low standby power consumption and integrated functions for overcurrent protection and soft start. Specific application areas include consumer electronics, telecommunications, industrial equipment, and renewable energy systems, such as solar inverters. The UC2842 is well-suited for designing efficient power supplies in compact, cost-sensitive applications.

Package

The UC2842AD8 is packaged in an 8-pin DIP (Dual In-line Package). This package type is designed for easy mounting on circuit boards and provides good thermal performance for the integrated circuit.

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