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LTC4245IUHF

Name: LTC4245IUHF
Rating: 4.7 (12 reviews)

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資料表 LTC4245IUHF DataSheet
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規格

Brand	Analog Devices
Shipping Restrictions	Mouser does not presently sell this product in your region.
Operating Supply Current	3 mA
Mounting Style	SMD/SMT
Package / Case	QFN-38
Product Type	Hot Swap Voltage Controllers
Series	LTC4245
Subcategory	PMIC - Power Management ICs

概述

Description

The LTC4245IUHF is a power management device designed for Power over Ethernet (PoE) applications. It facilitates the safe and efficient delivery of power over Ethernet cables to network devices like IP cameras, VoIP phones, and wireless access points. This integrated circuit supports both IEEE 802.3af and 802.3at PoE standards, allowing it to deliver up to 30W of power.
The LTC4245 includes features such as an integrated power discovery process, current limiting, and thermal protection. It also has a unique signature detection mechanism to identify powered devices, ensuring compatibility with a wide range of PoE devices. Its small package size and low thermal resistance make it suitable for compact designs.
The device operates over a wide input voltage range and is designed to enhance efficiency and reliability in network installations. Overall, the LTC4245IUHF simplifies PoE system design while providing robust protection and performance features.

Features

The LTC4245IUHF is a Power over Ethernet (PoE) powered device controller from Analog Devices. Key features include:
1. Power Sourcing Equipment (PSE) Compatibility: Supports IEEE 802.3af/at/bt standards for PoE.
2. Power Management: Capable of delivering up to 60W output power, with efficient power management functions.
3. Integrated MOSFETs: Contains integrated high-voltage MOSFETs to minimize external component count.
4. Programmable Current Limit: Offers adjustable output current limit for safe operation.
5. Detection and Classification: Features detection of powered devices (PDs) and classification to ensure proper power allocation.
6. Thermal Protection: Includes thermal shutdown to prevent overheating.
7. Flexible Interface: Provides an I²C interface for configuration and status monitoring.
8. Compact Package: Available in a small 32-lead QFN package, facilitating space-efficient designs.
These features make the LTC4245IUHF suitable for a range of PoE applications, ensuring reliable power delivery and management.

Package

The LTC4245IUHF is packaged in a 28-lead HTSSOP (Thermal Enhanced Thin Shrink Small Outline Package) with a 4mm x 5mm footprint. This package type is designed for enhanced thermal performance and is suitable for compact applications.

Pinout

The LTC4245IUHF is a Power Over Ethernet (PoE) powered device interface with a pin count of 16. Its primary function is to manage the detection and classification of PoE devices, providing power management capabilities and facilitating the safe connection of powered devices (PDs) to Power Sourcing Equipment (PSE).
Key functions include:
- Detecting the presence of a powered device.
- Classifying the device to determine power requirements.
- Enabling power through internal switches.
- Offering a fault protection feature to ensure safe operation.
The LTC4245IUHF is ideal for applications in IP phones, wireless access points, and security cameras, ensuring efficient power delivery and management in PoE systems.

Manufacturer

The LTC4245IUHF is manufactured by Analog Devices, Inc. Analog Devices is a multinational semiconductor company that specializes in data conversion, signal processing, and power management solutions. Founded in 1965, the company designs and manufactures analog, mixed-signal, and digital signal processing (DSP) integrated circuits used in a variety of applications, including communications, automotive, industrial, and consumer electronics. Analog Devices is known for its innovation in high-performance technology and plays a significant role in enabling the Internet of Things (IoT), automation, and advanced sensing capabilities in modern electronic devices.

Application

The LTC4245IUHF is a power management IC used primarily for hot-swap applications in enterprise and telecommunications systems. It enables safe insertion and removal of circuit boards while maintaining power integrity. Key application areas include server power supplies, data center equipment, and industrial automation systems. It also supports power distribution units (PDUs) and other high-reliability systems that require fault tolerance and efficient power management during dynamic load conditions.

Equivalent

Equivalent products to the LTC4245IUHF chip include the TI TPS23861, Analog Devices ADM1166, and the Maxim Integrated MAX5970. These alternatives also manage Power over Ethernet (PoE) applications, offering similar features such as PD detection and power management. Always verify specifications and compatibility for your specific application.