MP8020 Datasheet | Monolithic Power Systems

DESCRIPTION The MP8020 is an IEEE 802.3af/at/btpliant, Power over Ethernet (Po E), powered device (PD). The device supports all the functions of IEEE 802.3af/at/bt, including detection, 5-event classification, input current (IIN) control, and an internal 100V hot-swap MOSFET. The MP8020 provides configurable inrush current limiting during start-up and operation current limiting when the internal MOSFET is fully turned on. The GATE1 driver supports the use of an external low on resistance (RDS(ON)) MOSFET for high-power design. A high power good (PG) signal enables the use of a downstream DC/DC converter. The MP8020 also provides automatic maintain power signature functionality under light loads. An auxiliary power input detector (AUX) and GATE2 driver provide a smooth power switch from the power-sourcing equipment (PSE) to an auxiliary wall adapter with low power loss. The MP8020 also features a built-in detection resistor, thermal protection, and a wide input under-voltage lockout (UVLO) hysteresis. The MP8020 is available in a QFN-18 (3mmx5mm) package. TYPICAL APPLICATION From Q2 Adapter C3 From PSE VADP GATE2 GATE1 VOUT C2 SENSE D1 C1 VDD MP8020 TYP1 TYP2 R_MPS CLSA DUTY R5 CLSB ILIM R4 R1 R2 R3 IEEE 802.3af/at/bt-pliant, Po E, Powered Device Interface FEATURES - pliant with 802.3af/at/bt Specifications - Internal Detection Resistor - Supports Up to 71.3W Powered...