LT4275CHDD#PBF

Overview

The LT4275CHDD#PBF is a Powered Device (PD) controller from the LT4275 family, designed for IEEE 802.3af compliant PoE applications. It operates in a 10-pin DFN package and supports power levels up to 13W. The device integrates a charge pump to drive an external N-channel MOSFET, minimizing on-resistance and system losses. It features absolute maximum input voltage ratings of 100V and includes built-in signature resistors, undervoltage lockout, and thermal protection mechanisms.

Feature Summary

• Supports IEEE 802.3af Type 1 Powered Device standards
• Integrates charge pump for efficient N-channel MOSFET driving
• Includes onboard signature resistor for standard compliance
• Provides thermal protection and undervoltage lockout

Applications

• High-power wireless data systems
• Outdoor security camera equipment
• Commercial and public information displays
• Industrial applications requiring high temperature operation

Procurement Notes

Verify the specific suffix 'HDD' against official Analog Devices documentation to confirm the exact tape-and-reel or tube packaging configuration. Ensure the component meets RoHS compliance requirements as specified in the manufacturer's datasheet. Cross-reference the part number with authorized distributors to confirm current availability status and lead times.

Selection Notes

Select this controller for designs strictly adhering to IEEE 802.3af standards requiring up to 13W of power. It is suitable for applications needing low RDS(ON) efficiency through external N-channel MOSFETs. Consider the LT4275AHDD#PBF if higher power levels via LTPoE++ are required. Verify that the 10-pin DFN package fits the board layout constraints.

Part Context

The LT4275 series comprises pin-compatible controllers supporting various PoE standards. The LT4275C variant specifically targets IEEE 802.3af Type 1 PDs. This family eliminates the need for larger P-channel MOSFETs by utilizing internal charge pumps. The LT4275CHDD#PBF represents the specific package and tape configuration for the C-series controller.

FAQ

What is the maximum power output supported by the LT4275CHDD#PBF?

The LT4275CHDD#PBF supports up to 13W, consistent with IEEE 802.3af Type 1 Powered Device standards.

Does the LT4275CHDD#PBF support LTPoE++ classification?

No, the LT4275C variant does not support LTPoE++. Only the LT4275A variant supports LTPoE++ classification schemes.