Texas Instruments
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UCC28070APWR
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UCC28070APWR

Basic Information Overview

  • Category: Integrated Circuit (IC)
  • Use: Power Management
  • Characteristics: High-performance, low-power, voltage mode PWM controller
  • Package: TSSOP-14
  • Essence: Regulates and controls power delivery in various electronic systems
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Input Voltage Range: 8V to 16V
  • Output Voltage Range: 0.8V to 5.1V
  • Operating Temperature Range: -40°C to 125°C
  • Switching Frequency: Adjustable up to 2MHz
  • Maximum Duty Cycle: 100%
  • Current Limit: Programmable
  • Soft Start Time: Programmable
  • Error Amplifier Bandwidth: 10MHz

Detailed Pin Configuration

  1. VREF: Reference voltage input
  2. COMP: Error amplifier output
  3. FB: Feedback voltage input
  4. CS: Current sense input
  5. SS/TR: Soft start time programming pin
  6. RT/CT: Oscillator frequency programming pin
  7. GND: Ground
  8. DRVH: High-side gate driver output
  9. DRVL: Low-side gate driver output
  10. VDD: Power supply input
  11. UVLO: Undervoltage lockout input
  12. EN/UV: Enable/Undervoltage lockout programming pin
  13. SYNC: Synchronization input
  14. VIN: Input voltage

Functional Features

  • Voltage mode control with adjustable switching frequency
  • Programmable current limit and soft start time
  • Integrated high-side and low-side gate drivers
  • Synchronization capability for multi-phase operation
  • Protection features like undervoltage lockout (UVLO) and overcurrent protection (OCP)

Advantages

  • High-performance power management solution
  • Wide input voltage range for versatile applications
  • Adjustable output voltage and switching frequency for flexibility
  • Integrated gate drivers simplify circuit design
  • Protection features enhance system reliability

Disadvantages

  • Limited to low-power applications
  • Requires external components for complete power supply design
  • Not suitable for high-voltage applications

Working Principles

The UCC28070APWR is a voltage mode PWM controller that regulates power delivery in electronic systems. It operates by comparing the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is amplified and used to control the duty cycle of the power switches, which in turn regulates the output voltage.

The switching frequency can be adjusted using the RT/CT pin, allowing optimization for different applications. The soft start time can also be programmed using the SS/TR pin, enabling controlled startup and preventing excessive inrush current.

The integrated high-side and low-side gate drivers provide the necessary drive signals to control the power switches efficiently. Synchronization capability allows multiple UCC28070APWR controllers to operate in parallel for multi-phase power delivery.

Detailed Application Field Plans

The UCC28070APWR is widely used in various power management applications, including:

  1. Switching Power Supplies: Used in AC-DC converters, DC-DC converters, and LED drivers.
  2. Motor Control: Provides control signals for motor drives in appliances, industrial equipment, and automotive systems.
  3. Battery Charging: Regulates charging currents and voltages in battery-powered devices.
  4. Lighting Systems: Controls power delivery in LED lighting fixtures and fluorescent lamps.
  5. Renewable Energy: Manages power conversion in solar inverters and wind turbine systems.

Detailed and Complete Alternative Models

  1. UCC28070APW: Similar specifications and features, but available in a different package (SOIC-14).
  2. UCC28070APWTR: Tape and Reel packaging with 3000 units per reel.
  3. UCC28070APWG4: RoHS-compliant version of UCC28070APW.

(Note: This list is not exhaustive, and there may be other alternative models available in the market.)

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af UCC28070APWR i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of UCC28070APWR:

  1. Q: What is UCC28070APWR? A: UCC28070APWR is a pulse width modulation (PWM) controller IC used in power supply applications.

  2. Q: What is the operating voltage range of UCC28070APWR? A: The operating voltage range of UCC28070APWR is typically between 8V and 18V.

  3. Q: What is the maximum switching frequency supported by UCC28070APWR? A: UCC28070APWR supports a maximum switching frequency of 1 MHz.

  4. Q: Can UCC28070APWR be used in both flyback and forward converter topologies? A: Yes, UCC28070APWR can be used in both flyback and forward converter topologies.

  5. Q: Does UCC28070APWR have built-in protection features? A: Yes, UCC28070APWR has built-in protection features such as overvoltage protection, overcurrent protection, and thermal shutdown.

  6. Q: What is the maximum duty cycle supported by UCC28070APWR? A: The maximum duty cycle supported by UCC28070APWR is typically 100%.

  7. Q: Can UCC28070APWR operate in continuous or discontinuous conduction mode? A: UCC28070APWR can operate in both continuous and discontinuous conduction mode.

  8. Q: What is the purpose of the soft-start feature in UCC28070APWR? A: The soft-start feature in UCC28070APWR gradually ramps up the output voltage during startup to prevent excessive inrush current.

  9. Q: Can UCC28070APWR be used in high-power applications? A: Yes, UCC28070APWR can be used in high-power applications as it supports a wide input voltage range and has robust protection features.

  10. Q: What are the typical applications of UCC28070APWR? A: UCC28070APWR is commonly used in power supplies for industrial equipment, consumer electronics, and automotive systems.

Please note that the answers provided here are general and may vary depending on specific design considerations and requirements. It is always recommended to refer to the datasheet and application notes for detailed information.