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Product Detailed Parameters
- Description：QUAD-PORT, IEEE 802.3AF/AT-COMPL
- Series：-
- Mfr：Monolithic Power Systems Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：Controller (PSE)
- Number of Channels：4
- Power - Max：-
- Internal Switch(s)：No
- Auxiliary Sense：No
- Standards：802.3at (PoE+), 802.3af (PoE)
- Voltage - Supply：44V ~ 57V
- Current - Supply：2mA
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：32-VFQFN Exposed Pad
- Supplier Device Package：32-QFN (5x5)
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Overview
The MP3924GU-P is a quad-port Power Sourcing Equipment (PSE) controller compliant with IEEE 802.3af/at standards. It operates within a supply voltage range of 44 V to 57 V and supports four independent channels. The device features a quiescent current of 2 mA and a maximum power output of 3.9 W per port. It includes an integrated current limit of 17 mA and functions reliably across an operating temperature range from -40°C to +125°C. The component is housed in a QFN-32 package.
Feature Summary
- Supports four independent PoE ports for simultaneous power delivery
- Complies with IEEE 802.3af/at classification protocols
- Integrates high-voltage startup circuitry for direct connection to PSE bus
- Includes comprehensive protection mechanisms against short circuits and overloads
Applications
- Quad-port PoE switches
- PoE midspan injectors
- Network infrastructure equipment requiring multiple powered endpoints
- Industrial Ethernet controllers
Procurement Notes
Verify the specific suffix 'GU-P' matches the required RoHS-compliant tape-and-reel packaging configuration. Confirm that the QFN-32 footprint aligns with the target PCB layout. Ensure the design accounts for the specified thermal dissipation requirements given the 125°C maximum junction temperature rating. Cross-reference the datasheet revision date to confirm compatibility with latest IEEE standards.
Selection Notes
Select this component when a single IC solution is required to manage four PoE ports efficiently. It is suitable for designs needing strict adherence to IEEE 802.3af/at classification without external complex logic. Consider the QFN-32 package size constraints during layout planning. Evaluate the 2 mA quiescent current impact on overall system standby power consumption.
Part Context
This part belongs to the MP3924 series of PoE controllers from Monolithic Power Systems. It serves as a centralized management unit for powering multiple devices over Ethernet cables. The series is designed to simplify the implementation of multi-port PoE systems by integrating classification, power monitoring, and protection functions into a compact form factor.
Replacement Considerations
MP3924GU-Z is a non-RoHS variant of the same functional controller. Verify if lead-free compliance is mandatory for the target market before substituting.
