UCC28700DBVT

Product Overview

Use

This product is commonly used in various power supply systems, including but not limited to AC/DC converters, battery chargers, and LED drivers.

Characteristics

High efficiency: UCC28700DBVT offers excellent power conversion efficiency, reducing energy losses and improving overall system performance.
Wide input voltage range: It can operate with input voltages ranging from 4.5V to 30V, making it suitable for a wide range of applications.
Compact package: The UCC28700DBVT is available in a small SOT-23 package, allowing for space-efficient designs.
Low standby power consumption: This IC features low quiescent current, minimizing power consumption during standby or idle modes.

Package and Quantity

UCC28700DBVT is packaged in a SOT-23-6 package. It is typically sold in reels containing 3000 units per reel.

Specifications

Input Voltage Range: 4.5V to 30V
Output Voltage Range: Adjustable, depending on application requirements
Maximum Output Current: Up to 1A
Switching Frequency: Adjustable, up to 2MHz
Operating Temperature Range: -40°C to 125°C

Pin Configuration

The UCC28700DBVT has six pins arranged as follows:

_______ | | VDD|1 6|GND VIN|2 5|SW FB|3 4|COMP |_______|

VDD: Power supply pin for internal circuitry.
VIN: Input voltage pin.
FB: Feedback pin for regulating the output voltage.
COMP: Compensation pin for stability control.
SW: Switching node pin connected to the power switch.
GND: Ground reference pin.

Functional Features

Constant voltage (CV) and constant current (CC) regulation modes.
Overvoltage protection (OVP) and overcurrent protection (OCP) mechanisms.
Soft-start functionality to limit inrush current during startup.
Frequency dithering to reduce electromagnetic interference (EMI).
Adaptive dead-time control for improved efficiency.

Advantages and Disadvantages

Advantages

High efficiency leads to reduced power losses.
Wide input voltage range enables versatile applications.
Compact package allows for space-saving designs.
Low standby power consumption enhances energy efficiency.

Disadvantages

Limited maximum output current may not be suitable for high-power applications.
Requires external components for complete power supply implementation.
Complex circuit design may require expertise for optimal performance.

Working Principles

The UCC28700DBVT operates as a pulse-width modulation (PWM) controller. It regulates the output voltage by adjusting the duty cycle of the power switch based on feedback from the FB pin. The IC utilizes various control techniques, such as frequency dithering and adaptive dead-time control, to optimize efficiency and minimize EMI.

Application Field Plans

UCC28700DBVT finds applications in a wide range of power management systems, including: 1. AC/DC converters for consumer electronics. 2. Battery chargers for portable devices. 3. LED drivers for lighting applications. 4. Power supplies for industrial equipment. 5. Automotive power management systems.

Alternative Models

Here are some alternative models that can be considered as substitutes for UCC28700DBVT: 1. TPS54332DBVR 2. LM2576T-ADJ 3. LT1370CR#PBF 4. MAX1771ESA+ 5. MC34063ADR

These models offer similar functionality and can be used as drop-in replacements in many applications.

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技術ソリューションにおける UCC28700DBVT の適用に関連する 10 件の一般的な質問と回答をリストします。

Sure! Here are 10 common questions and answers related to the application of UCC28700DBVT in technical solutions:

Q: What is UCC28700DBVT?
A: UCC28700DBVT is a highly integrated primary-side regulated (PSR) flyback controller used in offline AC-DC power supplies.
Q: What are the key features of UCC28700DBVT?
A: Some key features include primary-side regulation, high efficiency, low standby power consumption, and wide input voltage range.
Q: How does UCC28700DBVT achieve primary-side regulation?
A: UCC28700DBVT uses a proprietary control algorithm that eliminates the need for an optocoupler or secondary-side feedback circuitry.
Q: What is the advantage of primary-side regulation?
A: Primary-side regulation simplifies the design, reduces component count, and improves overall system reliability.
Q: What is the typical input voltage range for UCC28700DBVT?
A: The typical input voltage range is from 85VAC to 265VAC, making it suitable for worldwide applications.
Q: Can UCC28700DBVT support multiple output voltages?
A: Yes, UCC28700DBVT can support multiple output voltages by using external components such as transformers and rectifiers.
Q: Does UCC28700DBVT have built-in protection features?
A: Yes, UCC28700DBVT has built-in protection features like overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.
Q: What is the efficiency of UCC28700DBVT?
A: UCC28700DBVT offers high efficiency, typically above 90%, which helps reduce power losses and improve energy efficiency.
Q: Can UCC28700DBVT operate in a wide temperature range?
A: Yes, UCC28700DBVT can operate in a wide temperature range, typically from -40°C to 125°C.
Q: What are some typical applications of UCC28700DBVT?
A: UCC28700DBVT is commonly used in applications such as power adapters, LED lighting, industrial power supplies, and home appliances.

Please note that these answers are general and may vary depending on the specific implementation and requirements of the technical solution.