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UC3854BN

Name: UC3854BN
Rating: 4.7 (12 reviews)

IC PFC CTR AV CURR 200KHZ 16DIP

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規格

Part Status	Active
Mode	Average Current
Frequency - Switching	200kHz
Voltage - Supply	10V ~ 20V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Supplier Device Package	16-PDIP
Base Product Number	UC3854
Current - Startup	250 µA

概述

Description

The UC3854BN is a high-performance, integrated control IC designed for use in power converter applications, particularly in off-line switching power supplies and DC-DC converters. It features a voltage mode control architecture, providing precise regulation of output voltage and current.
Key features include a wide input voltage range, adjustable output voltage, and built-in protections such as under-voltage lockout, overvoltage protection, and current limiting. The device operates at high frequency, allowing for smaller magnetic components and improved efficiency. Its PWM architecture enables smooth control of output power, enhancing system performance.
Additionally, the UC3854BN includes a soft-start function, which helps minimize inrush current during startup, and synchronization capabilities to reduce electromagnetic interference. Overall, it is widely used in applications like industrial power supplies, telecommunications, and consumer electronics, where reliable and efficient power management is essential.

Features

The UC3854BN is a high-performance, current-mode pulse width modulation (PWM) controller designed for use in switch-mode power supplies. Key features include:
1. Voltage Regulation: It provides precise output voltage regulation with an adjustable reference voltage.
2. Current Sensing: Incorporates peak current sensing to improve stability and response.
3. Integrated Features: Includes built-in features like soft start, leading-edge blanking, and fault protection.
4. Low Power Consumption: Operates efficiently with low quiescent current, enhancing overall system efficiency.
5. Wide Operating Range: Supports input voltages from 10V to 30V, making it versatile for various applications.
6. Diverse Applications: Suitable for isolated and non-isolated power supply designs, including AC-DC converters and DC-DC converters.
7. Thermal Shutdown: Built-in thermal protection to prevent overheating.
These features make the UC3854BN ideal for applications requiring high efficiency and reliability in power conversion.

Package

The UC3854BN is available in a dual in-line package (DIP) format, specifically a 16-pin DIP package. This package type is designed for through-hole mounting on printed circuit boards.

Pinout

The UC3854BN is a specialized integrated circuit (IC) used for controlling switch-mode power supplies. It features a 16-pin dual-in-line package (DIP).
Pin Count and Functions:
1. Pin 1 (CSN): Current sense negative.
2. Pin 2 (CS): Current sense positive.
3. Pin 3 (CT): Timing capacitor connection.
4. Pin 4 (VREF): Reference voltage output (5V).
5. Pin 5 (VFB): Voltage feedback input.
6. Pin 6 (COMP): Compensation network connection.
7. Pin 7 (GND): Ground.
8. Pin 8 (VCC): Supply voltage input.
9. Pin 9 (DIS): Disable input.
10. Pin 10 (RAMP): Ramp generator output.
11. Pin 11 (PWM): Pulse width modulation output.
12. Pin 12 (SW): Switch node connection.
13. Pin 13 (ST): Soft-start function.
14. Pin 14 (DTC): Dead-time control.
15. Pin 15 (PLLOUT): Output for phase-locked loop.
16. Pin 16 (PHASE): Phase input.
These pins collectively enable the UC3854BN to effectively manage power supply operations, offering features like voltage regulation and current limiting.

Manufacturer

The UC3854BN is manufactured by Texas Instruments (TI), a leading semiconductor company. Texas Instruments is known for designing and producing a wide range of analog, embedded processing, and digital signal processing (DSP) solutions. Founded in 1930, TI specializes in various markets, including automotive, communications, industrial, and consumer electronics. The UC3854BN specifically is a voltage-mode controller used in power supply applications, showcasing TI's focus on providing innovative solutions for energy efficiency and high-performance circuits.

Application

The UC3854BN is primarily used in power management applications, including off-line and DC-DC converters, switch-mode power supplies (SMPS), and power factor correction (PFC) circuits. Its features support applications such as battery chargers, industrial power supplies, and renewable energy systems. Additionally, it is suited for high-efficiency power conversion in telecom and automotive systems.

Equivalent

The UC3854BN is a current mode PWM controller. Equivalent products include the TL494, LM5022, and UC3842. Additionally, the LM3478 and MCP16331 can be considered for similar applications, though they may have different features or specifications. Always verify specific requirements and features when selecting alternatives.