STMicroelectronics
Afbeelding kan een representatie zijn.
Zie specificaties voor productdetails.
UC2843BD1013TR
Details bekijken DataSheets

UC2843BD1013TR

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Voltage Mode PWM Controller
  • Characteristics:
    • High-performance current mode PWM controller
    • Designed for offline and DC-to-DC converter applications
    • Provides necessary features to implement off-line or DC-to-DC fixed-frequency current-mode control schemes
  • Package: SOIC-8
  • Essence: The UC2843BD1013TR is a voltage mode PWM controller that is widely used in various power supply applications.
  • Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

  • Input Voltage Range: 7.6V to 30V
  • Output Voltage Range: 0V to 5.1V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Duty Cycle: 100%
  • Oscillator Frequency Range: 50kHz to 500kHz
  • Output Current: ±1A

Detailed Pin Configuration

The UC2843BD1013TR has 8 pins arranged as follows:

  1. VREF: Reference voltage input pin.
  2. COMP: Error amplifier output and compensation pin.
  3. FB: Feedback pin for regulating the output voltage.
  4. CS: Current sense input pin.
  5. GND: Ground reference pin.
  6. OUT: Output pin for driving external power devices.
  7. RT/CT: Timing resistor and capacitor connection pin.
  8. VCC: Power supply input pin.

Functional Features

  • Voltage mode control with pulse width modulation (PWM)
  • Internal error amplifier and oscillator
  • Adjustable soft-start function
  • Overcurrent protection
  • Under-voltage lockout (UVLO) protection
  • Leading-edge blanking (LEB) for improved noise immunity

Advantages and Disadvantages

Advantages: - High-performance current mode PWM controller - Wide input voltage range - Adjustable frequency and duty cycle - Comprehensive protection features

Disadvantages: - Limited output current capability (±1A) - Requires external components for complete power supply implementation

Working Principles

The UC2843BD1013TR operates as a voltage mode PWM controller, where the output voltage is regulated by adjusting the duty cycle of the PWM signal. It compares the feedback voltage with a reference voltage to generate an error signal, which is then amplified and used to control the switching of the power devices. By adjusting the duty cycle, the output voltage can be maintained at the desired level.

Detailed Application Field Plans

The UC2843BD1013TR is commonly used in various power supply applications, including: - Offline flyback converters - DC-to-DC buck and boost converters - LED drivers - Battery chargers - Industrial power supplies

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the UC2843BD1013TR are: - UC3843A: Similar voltage mode PWM controller with higher output current capability. - TL494: PWM controller with additional features like dead-time control and shutdown function. - SG3525: PWM controller specifically designed for high-frequency applications.

These alternative models offer similar functionality and can be used depending on specific requirements and design constraints.

Word count: 386 words

Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van UC2843BD1013TR in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of UC2843BD1013TR in technical solutions:

  1. Q: What is UC2843BD1013TR? A: UC2843BD1013TR is a specific model of integrated circuit (IC) used for controlling power supply circuits.

  2. Q: What are the main features of UC2843BD1013TR? A: The main features include adjustable frequency operation, soft-start capability, cycle-by-cycle current limiting, and low startup and operating currents.

  3. Q: How does UC2843BD1013TR control power supply circuits? A: It uses pulse width modulation (PWM) technique to regulate the output voltage by adjusting the duty cycle of the switching signal.

  4. Q: What is the input voltage range supported by UC2843BD1013TR? A: UC2843BD1013TR typically supports an input voltage range of 7V to 30V.

  5. Q: Can UC2843BD1013TR handle high current loads? A: No, UC2843BD1013TR is primarily designed for low to medium power applications and may not be suitable for high current loads.

  6. Q: Is UC2843BD1013TR suitable for both step-up and step-down voltage conversion? A: Yes, UC2843BD1013TR can be used for both step-up (boost) and step-down (buck) voltage conversion applications.

  7. Q: Does UC2843BD1013TR have built-in protection features? A: Yes, it has built-in features like overvoltage protection, undervoltage lockout, and thermal shutdown to protect the circuit from damage.

  8. Q: Can UC2843BD1013TR operate in a wide temperature range? A: Yes, UC2843BD1013TR is designed to operate in a temperature range of -40°C to 85°C.

  9. Q: What are the typical applications of UC2843BD1013TR? A: It is commonly used in switch-mode power supplies, battery chargers, LED drivers, and other similar applications.

  10. Q: Are there any recommended external components for using UC2843BD1013TR? A: Yes, typical external components include resistors, capacitors, inductors, and diodes, depending on the specific application requirements.

Please note that these answers are general and may vary based on the specific design and application considerations.