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LTC4253ACUF-ADJ
Product Overview
Category
LTC4253ACUF-ADJ belongs to the category of integrated circuits (ICs) and specifically falls under the power management ICs.
Use
This product is primarily used for power sourcing equipment (PSE) applications in Power over Ethernet (PoE) systems. It provides a complete solution for managing power delivery to powered devices (PDs) over Ethernet cables.
Characteristics
- Integrated power management IC
- Designed for PoE applications
- Supports power delivery to PDs
- Efficient power management features
- Adjustable output voltage
- Compact package size
Package
LTC4253ACUF-ADJ is available in a small form factor QFN (Quad Flat No-Lead) package, which ensures ease of integration into various system designs.
Essence
The essence of LTC4253ACUF-ADJ lies in its ability to efficiently manage power delivery in PoE systems, ensuring reliable and safe operation of powered devices.
Packaging/Quantity
This product is typically supplied in tape and reel packaging, with a quantity of 250 units per reel.
Specifications
- Input Voltage Range: 36V to 57V
- Output Voltage Range: Adjustable from 2.5V to 57V
- Maximum Output Current: 400mA
- Operating Temperature Range: -40°C to 85°C
- Package Type: QFN-32
Detailed Pin Configuration
- VDD: Power supply input
- GND: Ground reference
- VOUT: Adjustable output voltage
- EN: Enable pin for controlling the device operation
- FLT: Fault indicator output
- SENSE: Current sense input
- REF: Reference voltage output
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
- NC: No connection
Functional Features
- Integrated power management functions for PoE systems
- Adjustable output voltage allows flexibility in powering different devices
- Fault indicator output for system monitoring and diagnostics
- Enable pin for controlling device operation
- Current sense input for accurate power delivery control
- Reference voltage output for external circuitry
Advantages and Disadvantages
Advantages
- Efficient power management for PoE systems
- Adjustable output voltage provides versatility
- Compact package size enables easy integration
- Fault indicator enhances system monitoring capabilities
Disadvantages
- Limited maximum output current (400mA)
- Not suitable for high-power PoE applications
Working Principles
LTC4253ACUF-ADJ operates by receiving an input voltage within the range of 36V to 57V from a power source. It then regulates and delivers power to connected PDs over Ethernet cables. The adjustable output voltage feature allows customization according to the specific requirements of the powered devices.
The device incorporates various protection mechanisms to ensure safe and reliable operation, including fault detection and reporting. The enable pin allows control over the device's operation, enabling power delivery when required.
Detailed Application Field Plans
LTC4253ACUF-ADJ finds applications in a wide range of PoE systems, including: 1. IP cameras 2. Wireless access points 3. VoIP phones 4. Network switches 5. Industrial automation equipment 6. Building management systems
These application fields benefit from the efficient power management and adjustable output voltage capabilities of LTC4253ACUF-ADJ, ensuring reliable power delivery to connected devices.
Detailed and Complete Alternative Models
- LTC4253A-1: Similar to LTC4253ACUF-ADJ but without adjustable output voltage feature.
- LTC4253B: Higher maximum output current (800mA) for more demanding PoE applications.
- LTC4253C: Enhanced fault detection and reporting capabilities for improved system monitoring.
These alternative models provide options with varying features and specifications to cater to different requirements within the PoE ecosystem.
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Liệt kê 10 câu hỏi và câu trả lời thường gặp liên quan đến ứng dụng LTC4253ACUF-ADJ trong giải pháp kỹ thuật
Sure! Here are 10 common questions and answers related to the application of LTC4253ACUF-ADJ in technical solutions:
Q: What is LTC4253ACUF-ADJ? A: LTC4253ACUF-ADJ is a specific model of power sourcing equipment (PSE) controller used in Power over Ethernet (PoE) applications.
Q: What is the purpose of LTC4253ACUF-ADJ? A: The LTC4253ACUF-ADJ is designed to provide power and control functions for PoE systems, allowing devices to receive power and data over Ethernet cables.
Q: What are the key features of LTC4253ACUF-ADJ? A: Some key features include adjustable output voltage, integrated MOSFETs for power control, IEEE 802.3af/at compliance, and various protection mechanisms.
Q: How does LTC4253ACUF-ADJ work? A: LTC4253ACUF-ADJ works by converting the input voltage from a power supply into a regulated output voltage suitable for powering PoE devices. It also provides control signals for device detection, classification, and power management.
Q: What are the typical applications of LTC4253ACUF-ADJ? A: LTC4253ACUF-ADJ is commonly used in applications such as IP phones, wireless access points, security cameras, and other network-connected devices that require power over Ethernet.
Q: Can LTC4253ACUF-ADJ support both IEEE 802.3af and 802.3at standards? A: Yes, LTC4253ACUF-ADJ is compliant with both IEEE 802.3af and 802.3at standards, making it compatible with a wide range of PoE devices.
Q: What is the maximum power output of LTC4253ACUF-ADJ? A: The maximum power output depends on the input voltage and the specific implementation, but LTC4253ACUF-ADJ can support up to 25.5W of power for PoE devices.
Q: Does LTC4253ACUF-ADJ provide any protection features? A: Yes, LTC4253ACUF-ADJ includes various protection mechanisms such as overcurrent protection, overvoltage protection, and thermal shutdown to ensure safe operation.
Q: Can LTC4253ACUF-ADJ be used in both standalone and integrated PSE applications? A: Yes, LTC4253ACUF-ADJ can be used in both standalone PSE applications where it functions as a dedicated power sourcing equipment, or in integrated PSE applications where it is part of a larger system.
Q: Is LTC4253ACUF-ADJ available in different package options? A: Yes, LTC4253ACUF-ADJ is available in various package options, including QFN and TSSOP, allowing flexibility in design and integration into different systems.
Please note that these answers are general and may vary depending on the specific implementation and requirements of the technical solution.