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UCC28521DW
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UCC28521DW

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-performance synchronous rectifier controller
  • Package: SOIC-8 (Small Outline Integrated Circuit)
  • Essence: Efficient power conversion and control
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 4.5V to 28V
  • Output Voltage Range: 0V to 28V
  • Maximum Switching Frequency: 1MHz
  • Operating Temperature Range: -40°C to 125°C
  • Features: Adjustable dead-time control, adaptive shoot-through protection, programmable soft-start, cycle-by-cycle current limit, thermal shutdown protection

Detailed Pin Configuration

The UCC28521DW IC has the following pin configuration:

  1. VDD: Power supply input
  2. GND: Ground reference
  3. FB: Feedback voltage input
  4. COMP: Compensation node for error amplifier
  5. CS: Current sense input
  6. RT/CT: Timing resistor/capacitor connection
  7. SD: Shutdown control input
  8. OUT: Output voltage

Functional Features

  • Adjustable Dead-Time Control: Allows precise control over the timing between high-side and low-side MOSFETs to prevent shoot-through current.
  • Adaptive Shoot-Through Protection: Detects and prevents shoot-through current during switching transitions.
  • Programmable Soft-Start: Enables gradual ramp-up of the output voltage during startup to minimize inrush current.
  • Cycle-by-Cycle Current Limit: Protects the circuit by limiting the maximum current through the power switches.
  • Thermal Shutdown Protection: Automatically shuts down the IC when the temperature exceeds a safe threshold.

Advantages and Disadvantages

Advantages: - High-performance synchronous rectifier controller - Wide input and output voltage range - Adjustable dead-time control for precise timing - Adaptive shoot-through protection for enhanced safety - Programmable soft-start for controlled startup - Cycle-by-cycle current limit for circuit protection - Thermal shutdown protection for overtemperature conditions

Disadvantages: - Limited to SOIC-8 package, which may not be suitable for all applications - Requires external components for complete power management solution

Working Principles

The UCC28521DW is a high-performance synchronous rectifier controller IC used in power management applications. It operates by controlling the timing and switching of high-side and low-side MOSFETs to efficiently convert and regulate power. The adjustable dead-time control ensures that there is no overlap between the high-side and low-side switches, preventing shoot-through current. The adaptive shoot-through protection further enhances safety by detecting and preventing any potential shoot-through current during switching transitions. The IC also features programmable soft-start, cycle-by-cycle current limit, and thermal shutdown protection to provide comprehensive power management capabilities.

Detailed Application Field Plans

The UCC28521DW can be used in various power management applications, including:

  1. DC-DC Converters: The IC can be employed in buck, boost, or buck-boost converters to efficiently step down or step up the input voltage to the desired output voltage.
  2. Power Supplies: It can be utilized in AC-DC power supplies to regulate the output voltage and ensure stable power delivery.
  3. LED Lighting: The IC can be integrated into LED drivers to control the current and voltage supplied to the LEDs, ensuring optimal performance and efficiency.
  4. Battery Charging: It can be used in battery charging circuits to regulate the charging voltage and current, protecting the battery from overcharging or damage.

Detailed and Complete Alternative Models

Some alternative models to the UCC28521DW include:

  1. UCC28528D: Similar functionality with additional features such as adjustable frequency and synchronization capability.
  2. UCC28517D: Lower input voltage range but offers higher switching frequency and integrated bootstrap diode.
  3. UCC28510DW: Lower output voltage range but provides higher maximum switching frequency and integrated gate drivers.

These alternative models offer different specifications and features, allowing designers to choose the most suitable option for their specific application requirements.

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Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng UCC28521DW sa mga teknikal na solusyon

Sure! Here are 10 common questions and answers related to the application of UCC28521DW in technical solutions:

  1. Q: What is UCC28521DW? A: UCC28521DW is a high-performance, low-power current mode PWM controller used for various power supply applications.

  2. Q: What are the key features of UCC28521DW? A: Some key features include wide input voltage range, adjustable switching frequency, cycle-by-cycle current limit, and integrated soft-start.

  3. Q: What is the typical application of UCC28521DW? A: UCC28521DW is commonly used in offline flyback converters, LED lighting drivers, and other isolated or non-isolated power supply designs.

  4. Q: How does UCC28521DW achieve high efficiency? A: UCC28521DW incorporates advanced control techniques like valley switching and frequency foldback to optimize efficiency at light loads.

  5. Q: Can UCC28521DW operate with both AC and DC inputs? A: Yes, UCC28521DW can operate with both AC and DC inputs, making it suitable for universal input power supplies.

  6. Q: What is the maximum switching frequency supported by UCC28521DW? A: The maximum switching frequency supported by UCC28521DW is typically around 1 MHz.

  7. Q: Does UCC28521DW have built-in protection features? A: Yes, UCC28521DW provides comprehensive protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.

  8. Q: Can UCC28521DW be synchronized with an external clock source? A: Yes, UCC28521DW supports synchronization with an external clock source for applications requiring precise timing.

  9. Q: What is the operating temperature range of UCC28521DW? A: The operating temperature range of UCC28521DW is typically -40°C to 125°C.

  10. Q: Is UCC28521DW available in different package options? A: Yes, UCC28521DW is available in various package options, including SOIC-8 and WSON-8, providing flexibility for different PCB layouts and designs.

Please note that these answers are general and may vary depending on the specific datasheet and application requirements.