Texas Instruments
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UC3544N
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UC3544N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Mode PWM Controller
  • Characteristics: High-performance, versatile, and reliable
  • Package: DIP-16 (Dual In-line Package with 16 pins)
  • Essence: UC3544N is a voltage mode PWM controller designed for various power electronics applications.
  • Packaging/Quantity: Available in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

  • Input Voltage Range: 10V to 40V
  • Output Voltage Range: 0V to 5V
  • Operating Temperature Range: -40°C to +85°C
  • Switching Frequency: Adjustable from 50kHz to 500kHz
  • Maximum Duty Cycle: 100%
  • Supply Current: 6mA (typical)

Detailed Pin Configuration

The UC3544N IC has the following pin configuration:

  1. VCC: Power supply input
  2. GND: Ground reference
  3. COMP: Error amplifier output
  4. INV: Inverting input of the error amplifier
  5. NONINV: Non-inverting input of the error amplifier
  6. RT/CT: Timing resistor/capacitor connection
  7. OSC: Oscillator timing capacitor connection
  8. SYNC: Synchronization input
  9. CS: Current sense input
  10. SS/TR: Soft-start/Shutdown control
  11. FB: Feedback input
  12. OUT: Output of the PWM controller
  13. NC: No connection
  14. NC: No connection
  15. NC: No connection
  16. NC: No connection

Functional Features

  • Voltage mode control for precise regulation
  • Adjustable switching frequency for flexibility
  • Soft-start and shutdown control for smooth operation
  • Synchronization input for multi-phase operation
  • Error amplifier with high gain and low offset voltage
  • Current sense input for accurate current limiting

Advantages and Disadvantages

Advantages: - High-performance and reliable operation - Versatile functionality for various applications - Precise voltage regulation - Adjustable switching frequency - Soft-start feature for smooth power-up - Synchronization capability for multi-phase operation

Disadvantages: - Limited maximum duty cycle of 100% - Requires external timing resistor and capacitor - Not suitable for high-voltage applications

Working Principles

The UC3544N operates based on the voltage mode control technique. It compares the feedback voltage from the output with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM (Pulse Width Modulation) signal. By adjusting the duty cycle, the UC3544N regulates the output voltage according to the desired setpoint.

Detailed Application Field Plans

The UC3544N finds applications in various power electronics systems, including but not limited to:

  1. Switching Power Supplies
  2. DC-DC Converters
  3. Battery Chargers
  4. LED Drivers
  5. Motor Control Circuits
  6. Inverters

Detailed and Complete Alternative Models

  1. UC3844N: Similar voltage mode PWM controller with enhanced features.
  2. TL494CN: PWM controller with integrated error amplifier and adjustable dead-time control.
  3. SG3525AN: PWM controller with built-in oscillator and dual error amplifiers.

These alternative models offer similar functionality and can be considered as substitutes for the UC3544N in different applications.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق UC3544N في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of UC3544N in technical solutions:

  1. Q: What is UC3544N? A: UC3544N is a voltage mode PWM controller IC used for controlling power supply circuits.

  2. Q: What are the main features of UC3544N? A: The main features of UC3544N include adjustable frequency, soft-start capability, current limiting, and protection against overvoltage and undervoltage conditions.

  3. Q: How does UC3544N control the power supply circuit? A: UC3544N uses pulse width modulation (PWM) technique to regulate the output voltage of the power supply circuit.

  4. Q: Can UC3544N be used in both AC and DC power supply circuits? A: Yes, UC3544N can be used in both AC and DC power supply circuits.

  5. Q: What is the maximum operating voltage range of UC3544N? A: The maximum operating voltage range of UC3544N is typically between 8V and 35V.

  6. Q: Is UC3544N suitable for high-power applications? A: Yes, UC3544N is suitable for high-power applications as it can handle high currents and voltages.

  7. Q: Does UC3544N have built-in protection features? A: Yes, UC3544N has built-in protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  8. Q: Can UC3544N be used in battery charging circuits? A: Yes, UC3544N can be used in battery charging circuits as it provides precise control over the charging voltage.

  9. Q: Are there any specific application notes or reference designs available for UC3544N? A: Yes, the manufacturer of UC3544N provides application notes and reference designs that can help in implementing the IC in various technical solutions.

  10. Q: Where can I purchase UC3544N? A: UC3544N can be purchased from electronic component distributors, online marketplaces, or directly from the manufacturer's website.