UCC28501DW

Basic Information Overview

Category: Integrated Circuit (IC)
Use: Power Management
Characteristics:
- High efficiency
- Wide input voltage range
- Low standby power consumption
Package: SOIC-16
Essence: Voltage Mode PWM Controller
Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

Input Voltage Range: 4.5V to 65V
Output Voltage Range: 0.8V to 60V
Maximum Switching Frequency: 1MHz
Operating Temperature Range: -40°C to 125°C
Output Current: Up to 2A

Detailed Pin Configuration

COMP: Compensation pin for loop stability.
FB: Feedback pin for output voltage regulation.
CS: Current sense pin for current limit protection.
SS/TR: Soft-start and tracking pin.
VREF: Reference voltage output.
GND: Ground reference.
VCC: Supply voltage input.
DRVH: High-side gate driver output.
DRVL: Low-side gate driver output.
SYNC: Synchronization input for multiple ICs.
RT/CT: Timing components connection.
UVLO: Under-voltage lockout threshold pin.
EN/UV: Enable and undervoltage lockout control pin.
PGND: Power ground reference.
VSENSE: Voltage sense input.
VIN: Input voltage supply.

Functional Features

Voltage mode control with adjustable frequency and duty cycle.
Adaptive dead-time control for improved efficiency.
Programmable soft-start and tracking function.
Cycle-by-cycle current limit protection.
Overvoltage and undervoltage lockout protection.
Synchronization capability for multi-phase operation.
Error amplifier with adjustable compensation for stability.

Advantages and Disadvantages

Advantages

High efficiency power management solution.
Wide input voltage range allows for versatile applications.
Low standby power consumption for energy-saving operation.
Comprehensive protection features ensure system reliability.
Synchronization capability enables multi-phase operation.

Disadvantages

Limited output current capacity (up to 2A).
Requires external timing components for frequency control.
Not suitable for high-power applications.

Working Principles

The UCC28501DW is a voltage mode PWM controller designed for power management applications. It operates by comparing the feedback voltage from the FB pin with the reference voltage from the VREF pin. The COMP pin provides compensation for loop stability, ensuring proper regulation of the output voltage.

The IC utilizes adaptive dead-time control to optimize efficiency by minimizing switching losses. It also incorporates cycle-by-cycle current limit protection to prevent excessive current flow. The soft-start and tracking function allow gradual startup and synchronized operation with other devices.

The UCC28501DW features undervoltage and overvoltage lockout protection, safeguarding the system from potential damage. It can be synchronized with multiple ICs using the SYNC pin, enabling multi-phase operation for higher power applications.

Detailed Application Field Plans

The UCC28501DW is widely used in various power management applications, including:

DC-DC Converters: It can be employed in buck, boost, or flyback converters to regulate output voltage efficiently.
LED Lighting: The IC's wide input voltage range and high efficiency make it suitable for LED driver circuits.
Industrial Power Supplies: It can be utilized in industrial equipment requiring stable and efficient power conversion.
Automotive Electronics: The UCC28501DW's robust protection features make it ideal for automotive power systems.
Telecommunications: It finds application in telecom infrastructure equipment, such as base stations and routers.

Detailed and Complete Alternative Models

UCC28501DW-Q1: Automotive-grade version with enhanced reliability for automotive applications.
UCC28502DW: Similar functionality with additional features like adjustable slope compensation.
UCC28503DW: Higher output current capacity (up to 5A) for more demanding applications.
UCC28504DW: Dual-channel version for multi-phase power management solutions.

These alternative models offer similar functionality to the UCC28501DW, catering to different requirements and specifications.

Word count: 570 words

Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням UCC28501DW у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of UCC28501DW in technical solutions:

Q: What is UCC28501DW? A: UCC28501DW is a high-performance, low-power current mode PWM controller used for various power supply applications.
Q: What are the key features of UCC28501DW? A: Some key features include wide input voltage range, adjustable switching frequency, cycle-by-cycle current limit, and integrated soft-start.
Q: What is the typical application of UCC28501DW? A: UCC28501DW is commonly used in offline flyback converters, LED drivers, battery chargers, and other isolated or non-isolated power supply designs.
Q: How does UCC28501DW achieve cycle-by-cycle current limit? A: UCC28501DW utilizes a current sense resistor and an internal comparator to monitor the current flowing through the power MOSFET, enabling precise current limiting.
Q: Can UCC28501DW operate with a wide input voltage range? A: Yes, UCC28501DW can typically operate with input voltages ranging from 9V to 100V, making it suitable for a wide range of applications.
Q: Is UCC28501DW capable of adjustable switching frequency? A: Yes, UCC28501DW allows users to adjust the switching frequency within a specified range, providing flexibility in power supply design.
Q: Does UCC28501DW have integrated protection features? A: Yes, UCC28501DW incorporates various protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.
Q: Can UCC28501DW be used in high-power applications? A: Yes, UCC28501DW can be used in high-power applications by utilizing external power MOSFETs and appropriate circuit design considerations.
Q: What is the purpose of the integrated soft-start feature in UCC28501DW? A: The integrated soft-start feature gradually ramps up the output voltage during startup, reducing stress on components and preventing excessive inrush current.
Q: Are there any application notes or reference designs available for UCC28501DW? A: Yes, Texas Instruments provides application notes and reference designs that offer guidance on using UCC28501DW in various power supply applications.