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MP3924 Datasheet(PDF) 1 Page - Monolithic Power Systems |
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MP3924 Datasheet(HTML) 1 Page - Monolithic Power Systems |
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1 / 56 page  MP3924 Quad-Port, IEEE 802.3af/at PSE Controller for Power over Ethernet MP3924 Rev. 1.0 MonolithicPower.com 1 7/16/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. DESCRIPTION The MP3924 is a quad-port power source equipment (PSE) power controller for IEEE 802.3af/at compliant power over Ethernet (PoE) applications. The device has all the functions of IEEE 802.3af/at, including detection, single-event and two-event classification, current limiting, and disconnected load detection. All of the functions can be configured to work in automatic operation mode or software program mode via the I2C. The MP3924 features a 9-bit analog-to-digital converter (ADC) to monitor the current and voltage, a special I2C interface for isolated controller communication, adjustable current limits, and configurable system functions. These features provide flexibility for PoE applications. The MP3924 is available in a QFN-32 (5mmx5mm) package. FEATURES IEEE802.3af/at Compliant Quad-Port and 4-Bit Configurable I2C Address 0.25Ω Current-Sense Resistor Automatic Mode and I2C Command Control Mode Automatic Input Over-Power Shutdown Internal VCC Power Supply Three-Wire I2C Interface for Isolated Applications Two INT Pins for Interrupt Priority Selection Disconnected DC Load Detection Instantaneous Current/Voltage Readout Thermal Protection Available in a QFN-32 (5mmx5mm) Package APPLICATIONS PSE Switches/Routers PSE Midspan Power Injectors Surveillance NVR and DVRs All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION MP3924 VIN VIN = 54V C1 VCC EN AUTO MID A3 A2 A1 A0 OUTn Output Port x4 GATEn SENSEn SGNDx PGND DGND SCL SDAO SDAI INT1 C2 C3 R1 Q1 D1 PMAX R2 INT2 Note: Only One Port is Shown Here CLS5 CH1: VOUTx - VVIN 20V/div. Start-Up for Class 4 PD 100ms/div. |
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