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UCC28511DW
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UCC28511DW

Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for offline flyback converters - Provides precise regulation of output voltage and current - Offers protection features such as overvoltage, undervoltage, and overcurrent protection

Package: SOIC-16

Essence: The UCC28511DW is a voltage mode PWM controller that is widely used in offline flyback converters. It ensures accurate regulation of output voltage and current while providing various protection features.

Packaging/Quantity: The UCC28511DW is available in a standard SOIC-16 package. It is typically sold in reels or tubes containing multiple units.

Specifications

  • Input Voltage Range: 9V to 20V
  • Output Voltage Range: 0V to 30V
  • Maximum Output Current: 2A
  • Switching Frequency: 100kHz to 1MHz
  • Operating Temperature Range: -40°C to 125°C

Pin Configuration

The UCC28511DW has a total of 16 pins. Here is the detailed pin configuration:

  1. VDD: Power supply input
  2. GND: Ground reference
  3. FB: Feedback input for output voltage regulation
  4. COMP: Compensation node for loop stability
  5. CS: Current sense input for overcurrent protection
  6. SS/TR: Soft-start and tracking control
  7. RT/CT: Timing resistor and capacitor connection
  8. SYNC: Synchronization input for external clock
  9. EN/UVLO: Enable and undervoltage lockout control
  10. VREF: Reference voltage output
  11. DRVH: High-side gate driver output
  12. DRVL: Low-side gate driver output
  13. VSENSE: Voltage sense input for output voltage regulation
  14. VCC: Supply voltage for gate drivers
  15. NC: No connection
  16. NC: No connection

Functional Features

  • Voltage mode control with precise regulation of output voltage and current
  • Adjustable switching frequency for optimal performance
  • Soft-start function for controlled startup and reduced stress on components
  • Overvoltage protection to prevent damage to the load
  • Undervoltage lockout to ensure proper operation under low voltage conditions
  • Overcurrent protection for safe operation and fault detection

Advantages and Disadvantages

Advantages: - High-performance voltage mode controller - Accurate regulation of output voltage and current - Provides various protection features - Suitable for offline flyback converters

Disadvantages: - Limited maximum output current (2A) - Restricted operating temperature range (-40°C to 125°C)

Working Principles

The UCC28511DW operates based on the voltage mode control technique. It compares the feedback voltage from the output with a reference voltage and adjusts the duty cycle of the PWM signal accordingly. This ensures precise regulation of the output voltage and current.

The controller also incorporates various protection features such as overvoltage, undervoltage, and overcurrent protection. These safeguards help prevent damage to the load and ensure safe operation of the converter.

Detailed Application Field Plans

The UCC28511DW is commonly used in offline flyback converters, which are widely employed in various applications including:

  1. Power supplies for consumer electronics
  2. LED lighting systems
  3. Battery chargers
  4. Industrial automation equipment
  5. Telecommunication devices

Due to its high-performance characteristics and protection features, the UCC28511DW is well-suited for these application fields.

Detailed and Complete Alternative Models

  1. UCC28512DW: Similar to UCC28511DW but with higher maximum output current (3A)
  2. UCC28513DW: Similar to UCC28511DW but with wider operating temperature range (-40°C to 150°C)
  3. UCC28514DW: Similar to UCC28511DW but with additional features such as adjustable soft-start time and external synchronization capability

These alternative models offer similar functionality to the UCC28511DW while providing some variations in terms of specifications and additional features.

In conclusion, the UCC28511DW is a high-performance voltage mode PWM controller designed for offline flyback converters. It offers precise regulation of output voltage and current, along with various protection features. With its wide range of applications and availability of alternative models, it is a versatile choice for power supply designs.

قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق UCC28511DW في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of UCC28511DW:

  1. Q: What is UCC28511DW? A: UCC28511DW is a high-performance synchronous flyback controller IC designed for isolated power supply applications.

  2. Q: What are the key features of UCC28511DW? A: Some key features include wide input voltage range, high efficiency, primary-side regulation, and integrated protection features.

  3. Q: What is primary-side regulation (PSR)? A: Primary-side regulation refers to the control of output voltage or current on the primary side of an isolated power supply, eliminating the need for an optocoupler or secondary-side feedback circuitry.

  4. Q: What is the maximum input voltage range supported by UCC28511DW? A: UCC28511DW supports an input voltage range from 4.5V to 65V.

  5. Q: Can UCC28511DW be used in both AC-DC and DC-DC applications? A: Yes, UCC28511DW can be used in both AC-DC and DC-DC applications, making it versatile for various power supply designs.

  6. Q: What is the typical switching frequency of UCC28511DW? A: The typical switching frequency of UCC28511DW is around 100 kHz to 1 MHz, but it can be adjusted using external components.

  7. Q: Does UCC28511DW have any built-in protection features? A: Yes, UCC28511DW has built-in protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.

  8. Q: Can UCC28511DW support multiple outputs? A: Yes, UCC28511DW can support multiple outputs by using external components like transformers and rectifiers.

  9. Q: What is the efficiency range of UCC28511DW? A: UCC28511DW offers high efficiency, typically ranging from 85% to 95%, depending on the application and operating conditions.

  10. Q: Are there any reference designs available for UCC28511DW? A: Yes, Texas Instruments provides reference designs and application notes that can help in implementing UCC28511DW in various technical solutions.

Please note that these answers are general and may vary based on specific design requirements and application scenarios. It's always recommended to refer to the datasheet and application notes provided by the manufacturer for detailed information.