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 ControlMode

 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