UC2872NG4

Basic Information Overview

Category: Integrated Circuit (IC)
Use: Power Management
Characteristics: High Efficiency, Low Power Consumption
Package: DIP-16 (Dual In-Line Package with 16 pins)
Essence: Voltage Mode PWM Controller
Packaging/Quantity: Tube/50 pieces per tube

Specifications

Input Voltage Range: 10V to 30V
Output Voltage Range: 0.8V to 5.5V
Maximum Output Current: 3A
Switching Frequency: 100kHz to 1MHz
Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

VCC: Power Supply Input
GND: Ground
COMP: Compensation Pin for Feedback Loop
CS: Current Sense Input
RT/CT: Timing Components Connection
SS/TR: Soft-Start/Shutdown Control
FB: Feedback Voltage Input
INV: Inverting Input of Error Amplifier
EAOUT: Error Amplifier Output
ISENSE: Current Sense Output
SYNC: Synchronization Input
OSC: Oscillator Timing Components Connection
DRVH: High-Side Gate Driver Output
DRVL: Low-Side Gate Driver Output
VREF: Reference Voltage Output
UVLO: Under-Voltage Lockout Input

Functional Features

Voltage Mode PWM Control
Adjustable Output Voltage and Current Limit
Soft-Start and Shutdown Control
Synchronization Capability
Error Amplifier with External Compensation
Under-Voltage Lockout Protection

Advantages

High Efficiency Power Conversion
Wide Input Voltage Range
Flexible Output Voltage Adjustment
Robust Protection Features
Compact DIP-16 Package for Easy Integration

Disadvantages

Limited Maximum Output Current (3A)
Requires External Compensation Components
Not Suitable for High-Frequency Applications

Working Principles

The UC2872NG4 is a voltage mode PWM controller designed for power management applications. It operates by comparing the feedback voltage with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the power switch, regulating the output voltage. The controller also includes various protection features such as under-voltage lockout and current limiting.

Detailed Application Field Plans

The UC2872NG4 is commonly used in various power management applications, including: - DC-DC Converters - Switching Power Supplies - LED Drivers - Battery Chargers - Industrial Control Systems

Detailed and Complete Alternative Models

UC3842: Similar voltage mode PWM controller with higher maximum output current (5A).
UC2842: Voltage mode PWM controller with lower maximum output current (1A).
UC3872: Voltage mode PWM controller with additional features for power factor correction.

Note: These alternative models may have different pin configurations and specifications. Please refer to their respective datasheets for detailed information.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací UC2872NG4 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of UC2872NG4 in technical solutions:

Q: What is UC2872NG4? A: UC2872NG4 is a specific model of integrated circuit (IC) used for power management applications.
Q: What are the typical applications of UC2872NG4? A: UC2872NG4 is commonly used in various power supply designs, including offline flyback converters and LED lighting systems.
Q: What is the input voltage range supported by UC2872NG4? A: UC2872NG4 can handle a wide input voltage range, typically from 85V AC to 265V AC.
Q: What is the output power range that UC2872NG4 can handle? A: UC2872NG4 can support output power ranging from a few watts up to several tens of watts, depending on the specific design and application requirements.
Q: Does UC2872NG4 have built-in protection features? A: Yes, UC2872NG4 incorporates various protection features such as overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
Q: Can UC2872NG4 operate in continuous or discontinuous conduction mode? A: UC2872NG4 can operate in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), providing flexibility in different load conditions.
Q: Is UC2872NG4 suitable for high-efficiency power supply designs? A: Yes, UC2872NG4 is designed to achieve high efficiency in power supply applications, thanks to its advanced control algorithms and low-power consumption.
Q: Does UC2872NG4 support dimming control for LED lighting applications? A: Yes, UC2872NG4 offers various methods for implementing dimming control in LED lighting systems, such as pulse width modulation (PWM) and analog dimming.
Q: Can UC2872NG4 operate in a wide temperature range? A: Yes, UC2872NG4 is designed to operate reliably in a wide temperature range, typically from -40°C to 125°C.
Q: Are there any reference designs or application notes available for UC2872NG4? A: Yes, the manufacturer of UC2872NG4 provides reference designs and application notes that can help engineers in implementing the IC effectively in their designs.

Please note that the specific details and answers may vary depending on the manufacturer's documentation and the application requirements.