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UCC28712D
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UCC28712D - English Editing Encyclopedia Entry

Product Overview

Category

UCC28712D belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is primarily used in power supply systems, where it enables efficient and reliable power conversion.

Characteristics

  • High efficiency: UCC28712D offers excellent power conversion efficiency, minimizing energy losses during operation.
  • Compact package: The IC is housed in a small form factor package, making it suitable for space-constrained applications.
  • Versatile: It can be used in various power supply topologies, including flyback and resonant converters.
  • Robust protection features: UCC28712D incorporates comprehensive protection mechanisms to safeguard against overvoltage, overcurrent, and overtemperature conditions.

Package and Quantity

The UCC28712D is available in a compact surface-mount package. It is typically supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

  • Input voltage range: 4.5V to 30V
  • Output voltage range: 0.8V to 24V
  • Maximum output current: 1.5A
  • Switching frequency: 100kHz to 1MHz
  • Operating temperature range: -40°C to 125°C

Pin Configuration

The UCC28712D integrates several pins that serve different functions. The pin configuration is as follows:

  1. VDD: Power supply input for the IC.
  2. GND: Ground reference for the IC.
  3. FB: Feedback pin for regulating the output voltage.
  4. COMP: Compensation pin for stability control.
  5. EN/UVLO: Enable/Undervoltage lockout pin.
  6. CS: Current sense pin for current regulation.
  7. SS/CLKOUT: Soft-start/External clock synchronization pin.
  8. VCC: Auxiliary power supply input for internal circuitry.
  9. DRV: Gate driver output for driving external power switches.
  10. SW: Switch node connection for the power converter.

Functional Features

The UCC28712D offers several functional features that enhance its performance and usability:

  1. Primary-side regulation: The IC employs primary-side feedback control, eliminating the need for an optocoupler or secondary-side feedback components.
  2. Constant voltage/constant current operation: It supports both constant voltage and constant current modes, making it suitable for various load conditions.
  3. Frequency dithering: UCC28712D incorporates frequency dithering to reduce electromagnetic interference (EMI) emissions.
  4. Soft-start and hiccup mode protection: Soft-start functionality ensures a controlled startup, while hiccup mode protection prevents damage in case of faults.
  5. Adaptive dead time control: The IC dynamically adjusts the dead time to optimize efficiency and minimize switching losses.

Advantages and Disadvantages

Advantages

  • High efficiency leads to reduced power consumption and heat dissipation.
  • Compact package enables space-saving designs.
  • Versatility allows for use in different power supply topologies.
  • Robust protection mechanisms ensure system reliability.

Disadvantages

  • Limited maximum output current may not be suitable for high-power applications.
  • Requires careful consideration of component selection and layout to achieve optimal performance.

Working Principles

UCC28712D operates based on the principle of pulse width modulation (PWM). It regulates the output voltage by adjusting the duty cycle of the switching waveform. The feedback loop compares the output voltage with a reference voltage and adjusts the duty cycle accordingly. This control mechanism ensures a stable and accurate output voltage despite variations in input voltage and load conditions.

Application Field Plans

The UCC28712D finds extensive application in various power supply systems, including but not limited to: - AC/DC adapters - LED lighting drivers - Industrial power supplies - Telecom power modules

Alternative Models

For users seeking alternatives to UCC28712D, the following models offer similar functionality and can be considered: - UCC28711D - UCC28713D - UCC28714D - UCC28715D

These alternative models provide comparable features and performance characteristics, allowing designers to choose the most suitable option for their specific application requirements.

In conclusion, UCC28712D is a highly efficient integrated circuit designed for power management applications. Its compact package, versatile nature, and robust protection mechanisms make it an ideal choice for various power supply systems. With its primary-side regulation and advanced features, UCC28712D offers significant advantages while ensuring reliable and stable power conversion.

Noem 10 veelgestelde vragen en antwoorden met betrekking tot de toepassing van UCC28712D in technische oplossingen

Sure! Here are 10 common questions and answers related to the application of UCC28712D in technical solutions:

  1. Q: What is UCC28712D? A: UCC28712D is a highly integrated primary-side regulated (PSR) flyback controller used in offline AC-DC power supplies.

  2. Q: What are the key features of UCC28712D? A: Some key features of UCC28712D include primary-side regulation, high efficiency, low standby power consumption, and comprehensive protection features.

  3. Q: How does UCC28712D achieve primary-side regulation? A: UCC28712D uses a proprietary constant on-time (COT) control scheme that enables accurate regulation without the need for an optocoupler or secondary-side feedback circuitry.

  4. Q: What is the maximum output power that UCC28712D can handle? A: UCC28712D can handle output power up to 25W, making it suitable for a wide range of applications such as adapters, chargers, and auxiliary power supplies.

  5. Q: Can UCC28712D operate in continuous conduction mode (CCM)? A: Yes, UCC28712D supports both discontinuous conduction mode (DCM) and continuous conduction mode (CCM) operation, providing flexibility in design.

  6. Q: Does UCC28712D have built-in protection features? A: Yes, UCC28712D incorporates various protection features like overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown to ensure safe and reliable operation.

  7. Q: What is the standby power consumption of UCC28712D? A: UCC28712D has an ultra-low standby power consumption of less than 40mW, making it compliant with stringent energy efficiency standards.

  8. Q: Can UCC28712D operate in wide input voltage range? A: Yes, UCC28712D can operate in a wide input voltage range of 85VAC to 265VAC, enabling global compatibility.

  9. Q: Does UCC28712D support primary-side regulation for multiple outputs? A: Yes, UCC28712D supports primary-side regulation for multiple outputs, allowing for efficient and cost-effective designs with multiple voltage rails.

  10. Q: Are there any evaluation boards or reference designs available for UCC28712D? A: Yes, Texas Instruments provides evaluation boards and reference designs for UCC28712D, which can help designers quickly prototype and implement their power supply solutions.

Please note that the answers provided here are general and may vary depending on specific design requirements and application scenarios.