Texas Instruments
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UCC2817ADG4
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UCC2817ADG4

Product Overview

Category

UCC2817ADG4 belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in power management applications.

Characteristics

  • UCC2817ADG4 is a high-performance current-mode PWM controller.
  • It operates with a wide input voltage range, making it suitable for various power supply designs.
  • The device offers excellent line and load regulation, ensuring stable output voltages.
  • It features a low start-up current, enabling efficient power management.
  • UCC2817ADG4 incorporates protection features such as overvoltage and overcurrent protection.

Package

The UCC2817ADG4 comes in a standard 8-pin SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of UCC2817ADG4 lies in its ability to regulate and control power supply systems efficiently.

Packaging/Quantity

UCC2817ADG4 is typically packaged in reels or tubes, containing a quantity of 250 units per package.

Specifications

  • Input Voltage Range: 10V - 30V
  • Output Voltage Range: 0.8V - 5V
  • Operating Temperature Range: -40°C to +85°C
  • Switching Frequency: 100kHz - 1MHz
  • Maximum Duty Cycle: 90%
  • Supply Current: 2mA

Detailed Pin Configuration

  1. VREF: Reference voltage input pin.
  2. COMP: Error amplifier output pin.
  3. CS: Current sense input pin.
  4. RT/CT: Timing resistor/capacitor connection pin.
  5. GND: Ground pin.
  6. VCC: Power supply input pin.
  7. OUT: Output pin.
  8. SYNC: Synchronization input pin.

Functional Features

  • Current-Mode Control: UCC2817ADG4 utilizes current-mode control to regulate the output voltage accurately.
  • Error Amplifier: The built-in error amplifier compares the feedback voltage with the reference voltage, adjusting the duty cycle accordingly.
  • Overvoltage Protection: The IC incorporates overvoltage protection, preventing damage to the power supply system during voltage spikes.
  • Overcurrent Protection: UCC2817ADG4 includes overcurrent protection, safeguarding the system from excessive current flow.

Advantages and Disadvantages

Advantages

  • Wide input voltage range allows for versatile power supply designs.
  • Excellent line and load regulation ensure stable output voltages.
  • Low start-up current enables efficient power management.
  • Overvoltage and overcurrent protection enhance system reliability.

Disadvantages

  • Limited maximum duty cycle may restrict certain applications requiring higher duty cycles.
  • Operating temperature range might not be suitable for extreme environments.

Working Principles

UCC2817ADG4 operates based on the current-mode control principle. It compares the sensed current with a reference voltage and adjusts the duty cycle of the PWM signal accordingly. This control mechanism ensures accurate regulation of the output voltage. The error amplifier continuously monitors the feedback voltage and compares it with the reference voltage, making necessary adjustments to maintain the desired output voltage level. The IC also incorporates protection features such as overvoltage and overcurrent protection, which help safeguard the power supply system.

Detailed Application Field Plans

UCC2817ADG4 finds extensive application in various power management systems, including:

  1. Switching Power Supplies: The IC is commonly used in switch-mode power supplies (SMPS) to regulate and control the output voltage efficiently.
  2. Battery Chargers: UCC2817ADG4 can be employed in battery charging circuits to manage the charging process effectively.
  3. LED Lighting Systems: The IC is suitable for driving LED lighting systems, ensuring stable and regulated power supply to the LEDs.
  4. Industrial Automation: UCC2817ADG4 is utilized in industrial automation systems to control and regulate power supply units.

Detailed and Complete Alternative Models

  1. UC3843: This IC offers similar functionality and features as UCC2817ADG4, with a different pin configuration.
  2. TL494: Another alternative with comparable characteristics, widely used in power management applications.
  3. SG3525: This IC provides similar functionality and can be used as an alternative to UCC2817ADG4 in various power supply designs.

(Note: The above list is not exhaustive and there are several other alternative models available in the market.)

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רשום 10 שאלות ותשובות נפוצות הקשורות ליישום של UCC2817ADG4 בפתרונות טכניים

Sure! Here are 10 common questions and answers related to the application of UCC2817ADG4 in technical solutions:

  1. Q: What is UCC2817ADG4? A: UCC2817ADG4 is a high-performance current-mode PWM controller used in power supply applications.

  2. Q: What are the key features of UCC2817ADG4? A: Some key features include adjustable frequency operation, cycle-by-cycle current limiting, soft-start capability, and integrated error amplifier.

  3. Q: How does UCC2817ADG4 help in power supply designs? A: UCC2817ADG4 provides precise control over the power supply output voltage and current, ensuring stable and efficient operation.

  4. Q: Can UCC2817ADG4 be used in both AC-DC and DC-DC power supplies? A: Yes, UCC2817ADG4 can be used in both AC-DC and DC-DC power supply applications.

  5. Q: What is cycle-by-cycle current limiting? A: Cycle-by-cycle current limiting is a feature that protects the power supply by monitoring the current flowing through the power components and limiting it if it exceeds a certain threshold.

  6. Q: How is the frequency of operation adjusted in UCC2817ADG4? A: The frequency of operation can be adjusted by changing the value of an external resistor connected to the RT pin of UCC2817ADG4.

  7. Q: Does UCC2817ADG4 have protection features? A: Yes, UCC2817ADG4 has various protection features like overvoltage protection, undervoltage lockout, and thermal shutdown.

  8. Q: Can UCC2817ADG4 support high-power applications? A: Yes, UCC2817ADG4 can support high-power applications by driving external power MOSFETs or IGBTs.

  9. Q: What is the soft-start capability of UCC2817ADG4? A: Soft-start capability allows for a gradual increase in the output voltage during startup, reducing stress on the power components and preventing overshoot.

  10. Q: Are there any application notes or reference designs available for UCC2817ADG4? A: Yes, Texas Instruments provides application notes and reference designs that help users understand and implement UCC2817ADG4 in various power supply applications.

Please note that these questions and answers are general and may vary depending on specific use cases and requirements.