LTC4252-1CMS8#PBF
Product Overview
Category
LTC4252-1CMS8#PBF belongs to the category of integrated circuits (ICs) used in power management.
Use
This product is primarily used for power sourcing equipment (PSE) applications, specifically in Power over Ethernet (PoE) systems.
Characteristics
- Integrated circuit
- Power management functionality
- Designed for PoE systems
- Small form factor
- Low power consumption
Package
LTC4252-1CMS8#PBF comes in an 8-pin MSOP package.
Essence
The essence of this product lies in its ability to efficiently manage power in PoE systems, ensuring reliable and safe operation.
Packaging/Quantity
LTC4252-1CMS8#PBF is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.
Specifications
- Input Voltage Range: 36V to 57V
- Output Voltage Range: 0V to 57V
- Maximum Output Current: 400mA
- Operating Temperature Range: -40°C to 85°C
- Supply Voltage: 4.5V to 5.5V
- Quiescent Current: 200µA
Detailed Pin Configuration
- VDD: Supply voltage input
- GND: Ground reference
- EN: Enable pin for controlling the device's operation
- FLT: Fault indicator output
- POK: Power OK indicator output
- VOUT: Output voltage pin
- VSENSE: Sense resistor connection for current monitoring
- VIN: Input voltage pin
Functional Features
- Integrated IEEE 802.3af-compliant PD interface
- Automatic detection and classification of powered devices
- Programmable current limit and undervoltage lockout
- Fault detection and reporting
- Power good indicator for system monitoring
- Low quiescent current for energy efficiency
Advantages and Disadvantages
Advantages
- Compact size allows for space-saving designs
- Efficient power management for PoE systems
- Comprehensive fault detection and reporting
- Programmable features for customization
- Reliable operation in a wide temperature range
Disadvantages
- Limited maximum output current (400mA)
- Requires additional external components for complete PoE system implementation
Working Principles
LTC4252-1CMS8#PBF operates by integrating the necessary functionality to manage power in PoE systems. It utilizes an IEEE 802.3af-compliant PD interface to automatically detect and classify powered devices. The device incorporates programmable features such as current limit and undervoltage lockout, ensuring safe and reliable operation. Fault detection and reporting mechanisms provide valuable feedback for system monitoring. The low quiescent current of the LTC4252-1CMS8#PBF contributes to energy efficiency.
Detailed Application Field Plans
The LTC4252-1CMS8#PBF is widely used in various PoE applications, including: - IP cameras - Wireless access points - VoIP phones - Network switches - Industrial automation equipment
Its compact size, efficient power management, and comprehensive features make it suitable for these applications.
Detailed and Complete Alternative Models
- LTC4267-2IMS8#PBF: Similar functionality with enhanced fault protection features.
- LTC4274A-1IMS8#PBF: Higher maximum output current (800mA) with integrated hot swap controller.
- LTC4269-2IMS8#PBF: Enhanced power management capabilities with adjustable current limit.
These alternative models offer similar functionality to the LTC4252-1CMS8#PBF, catering to different requirements and specifications.
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技術ソリューションにおける LTC4252-1CMS8#PBF 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 LTC4252-1CMS8#PBF in technical solutions:
Q1: What is LTC4252-1CMS8#PBF? A1: LTC4252-1CMS8#PBF is a specific model number for a power sourcing equipment (PSE) controller IC manufactured by Linear Technology (now part of Analog Devices). It is used in Power over Ethernet (PoE) applications.
Q2: What is the purpose of LTC4252-1CMS8#PBF? A2: The LTC4252-1CMS8#PBF is designed to provide power and control signals to powered devices (PDs) in PoE systems. It enables the PSE to negotiate power levels, monitor PD status, and manage power delivery.
Q3: What are the key features of LTC4252-1CMS8#PBF? A3: Some key features of LTC4252-1CMS8#PBF include IEEE 802.3af-compliant PoE support, programmable current limit, thermal shutdown protection, and fault detection capabilities.
Q4: How does LTC4252-1CMS8#PBF negotiate power levels with PDs? A4: LTC4252-1CMS8#PBF uses a combination of classification and detection methods defined in the IEEE 802.3af standard to negotiate power levels with PDs. It communicates with the PD to determine its power requirements.
Q5: Can LTC4252-1CMS8#PBF be used in both 10/100Mbps and Gigabit Ethernet applications? A5: Yes, LTC4252-1CMS8#PBF is compatible with both 10/100Mbps and Gigabit Ethernet applications. It supports auto-negotiation and can adapt to the specific Ethernet speed.
Q6: What is the maximum power that LTC4252-1CMS8#PBF can deliver to a PD? A6: The maximum power that LTC4252-1CMS8#PBF can deliver to a PD depends on the power supply and the classification of the PD. It supports up to 15.4W (Class 0) or 25.5W (Class 3) power delivery.
Q7: Can LTC4252-1CMS8#PBF detect and protect against fault conditions in the PoE system? A7: Yes, LTC4252-1CMS8#PBF has built-in fault detection capabilities. It can detect overcurrent, overvoltage, and short-circuit conditions, and take appropriate actions to protect the PSE and PDs.
Q8: Is LTC4252-1CMS8#PBF suitable for industrial applications? A8: Yes, LTC4252-1CMS8#PBF is designed to operate in a wide temperature range (-40°C to +85°C) and is suitable for industrial applications where ruggedness and reliability are required.
Q9: Does LTC4252-1CMS8#PBF require external components for operation? A9: Yes, LTC4252-1CMS8#PBF requires external components such as resistors, capacitors, and transformers to complete the PoE circuitry. The datasheet provides detailed application circuit examples.
Q10: Where can I find more information about LTC4252-1CMS8#PBF? A10: You can find more information about LTC4252-1CMS8#PBF, including its datasheet, application notes, and technical support resources, on the Analog Devices website or by contacting their customer support team.
Please note that the answers provided here are general and may vary depending on the specific application and requirements. It is always recommended to refer to the datasheet and consult with technical experts for accurate information.