UC2848DWG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Voltage Mode PWM Controller
• Characteristics:
  • High-performance PWM controller
  • Wide input voltage range
  • Adjustable frequency and duty cycle
  • Protection features for overvoltage, undervoltage, and overcurrent
• Package: SOIC-16
• Essence: The UC2848DWG4 is a voltage mode PWM controller designed for various power supply applications.
• Packaging/Quantity: Available in reels of 2500 units.

Specifications

• Input Voltage Range: 7V to 30V
• Output Voltage Range: 0V to 5.1V
• Operating Temperature Range: -40°C to +85°C
• Switching Frequency Range: 50kHz to 500kHz
• Maximum Duty Cycle: 100%
• Current Limit: Adjustable up to 1A

Detailed Pin Configuration

The UC2848DWG4 has the following pin configuration:

1. COMP: Compensation pin for external compensation network.
2. CS: Current sense input for current limit protection.
3. RT/CT: Timing resistor/capacitor connection for frequency and duty cycle control.
4. GND: Ground reference for the IC.
5. VREF: Reference voltage output for feedback purposes.
6. FB: Feedback pin for regulating the output voltage.
7. VCC: Power supply input for the IC.
8. SYNC: Synchronization input for multiple ICs.
9. SS/TR: Soft-start/Shutdown pin for controlling startup and shutdown operations.
10. OUT: Output pin for driving external power MOSFET.
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

• Voltage mode control for stable and accurate regulation.
• Adjustable frequency and duty cycle for flexible power supply design.
• Protection features such as overvoltage, undervoltage, and overcurrent protection.
• Soft-start function for controlled startup and shutdown operations.
• Synchronization capability for parallel operation of multiple ICs.

Advantages and Disadvantages

Advantages: - High-performance PWM controller for reliable power supply designs. - Wide input voltage range allows for versatile applications. - Adjustable frequency and duty cycle provide flexibility in power supply design. - Protection features ensure safe operation and prevent damage to the system.

Disadvantages: - Limited maximum current limit of 1A may not be suitable for high-power applications. - Requires external compensation network for stability, adding complexity to the design.

Working Principles

The UC2848DWG4 operates on the voltage mode control principle. It compares the feedback voltage (FB) with a reference voltage (VREF) to regulate the output voltage. The timing resistor (RT) and capacitor (CT) connected to the RT/CT pin determine the frequency and duty cycle of the PWM signal. The COMP pin is used to connect an external compensation network for stability and loop control. The CS pin senses the current flowing through the power MOSFET and provides current limit protection.

Detailed Application Field Plans

The UC2848DWG4 is widely used in various power supply applications, including:

1. Switching Power Supplies: Used in AC-DC and DC-DC converters for efficient power conversion.
2. LED Lighting: Provides precise control of LED drivers for lighting applications.
3. Battery Chargers: Enables efficient charging of batteries with adjustable voltage and current limits.
4. Industrial Power Supplies: Used in industrial equipment for reliable and regulated power delivery.
5. Telecom Power Systems: Provides stable power supply for telecom infrastructure and equipment.

Detailed and Complete Alternative Models

1. UC2848DWG3: Similar specifications and features, but with a different package (PDIP-16).
2. UC3848DWG4: Higher current limit of 2A, suitable for higher-power applications.
3. UC2849DWG4: Enhanced version with additional protection features and improved performance.

(Note: This list is not exhaustive and other alternative models may exist.)

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