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UCC28730DR
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UCC28730DR

Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High efficiency - Low standby power consumption - Wide input voltage range - Integrated protection features

Package: SOIC (Small Outline Integrated Circuit)

Essence: UCC28730DR is a power management IC designed for efficient power conversion and management in various applications.

Packaging/Quantity: The UCC28730DR is typically sold in reels of 2500 units.

Specifications

  • Input Voltage Range: 4.5V to 75V
  • Output Voltage Range: 0.8V to 60V
  • Maximum Output Current: 1A
  • Switching Frequency: Up to 2 MHz
  • Operating Temperature Range: -40°C to +125°C

Pin Configuration

The UCC28730DR has the following pin configuration:

  1. VDD: Power supply input
  2. GND: Ground reference
  3. FB: Feedback pin for output voltage regulation
  4. COMP: Compensation pin for stability control
  5. CS: Current sense pin for current limit control
  6. EN/UVLO: Enable/Undervoltage lockout pin
  7. SS/CLKOUT: Soft-start/External clock synchronization pin
  8. DRV: Gate driver output for external MOSFET

Functional Features

  • Primary-side regulation for improved efficiency
  • Adaptive feedback compensation for stable operation
  • Cycle-by-cycle current limit protection
  • Programmable soft-start for controlled startup
  • Overvoltage and undervoltage protection
  • Thermal shutdown protection

Advantages and Disadvantages

Advantages: - High efficiency power conversion - Wide input voltage range allows for versatile applications - Integrated protection features enhance system reliability - Compact SOIC package for space-constrained designs

Disadvantages: - Limited maximum output current (1A) - Requires external MOSFET for power switching

Working Principles

The UCC28730DR utilizes primary-side regulation to achieve efficient power conversion. It operates by controlling the duty cycle of an external MOSFET based on the feedback received from the output voltage. The integrated compensation circuitry ensures stable operation and prevents oscillations. The IC also incorporates various protection features such as overvoltage, undervoltage, and thermal shutdown to safeguard the system.

Application Field Plans

The UCC28730DR is suitable for a wide range of applications, including but not limited to: - Power adapters - LED lighting - Industrial power supplies - Telecom equipment - Battery chargers

Alternative Models

Some alternative models that can be considered as alternatives to UCC28730DR are: - UCC28731DR - UCC28732DR - UCC28733DR - UCC28734DR

These models offer similar functionality and characteristics, providing flexibility in design choices.

In conclusion, the UCC28730DR is a highly efficient power management IC with a wide input voltage range and integrated protection features. Its primary-side regulation and compact package make it suitable for various applications. However, it has limitations in terms of maximum output current and requires an external MOSFET for power switching.

Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi UCC28730DR dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of UCC28730DR in technical solutions:

  1. Q: What is UCC28730DR? A: UCC28730DR 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 UCC28730DR? A: Some key features of UCC28730DR include primary-side regulation, high efficiency, low standby power consumption, and support for wide input voltage range.

  3. Q: How does UCC28730DR achieve primary-side regulation? A: UCC28730DR uses a proprietary constant on-time control scheme that eliminates the need for an optocoupler or secondary-side feedback circuitry.

  4. Q: What is the advantage of primary-side regulation? A: Primary-side regulation simplifies the design, reduces component count, and improves overall system reliability.

  5. Q: What is the typical application of UCC28730DR? A: UCC28730DR is commonly used in applications such as USB chargers, adapters, auxiliary power supplies, and small appliances.

  6. Q: What is the maximum output power supported by UCC28730DR? A: UCC28730DR can support output power up to 25W, depending on the specific application and design considerations.

  7. Q: Does UCC28730DR have built-in protection features? A: Yes, UCC28730DR provides various protection features including overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.

  8. Q: Can UCC28730DR operate with both universal input voltage (85VAC-265VAC) and low-line input voltage (85VAC-135VAC)? A: Yes, UCC28730DR is designed to operate with both universal input voltage and low-line input voltage.

  9. Q: Does UCC28730DR support power factor correction (PFC)? A: No, UCC28730DR does not have built-in PFC functionality. However, it can be used in conjunction with an external PFC controller if required.

  10. Q: Are there any evaluation boards or reference designs available for UCC28730DR? A: Yes, Texas Instruments provides evaluation boards and reference designs that can help designers quickly prototype and implement solutions using UCC28730DR.

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