PD70211 PD Controller with Switching Regulator for AF/AT/UPOE/ HDBaseT/4-pair PoE Applications Product Overview Microchip s PD70211 is an advanced PD interface IC with integrated switching Pulse-Width Modulation (PWM) regulator control for powered devices in PoE applications. It supports IEEE 802.3af, IEEE 802at, HDBaseT, and general 2/4-pair configurations. The PD70211 front-end includes an advanced classification block that supports 2, 3, 4, and 6 event classification. Using the SUPP Sx pins, it also identifies the four pairs of cable that actually receive power and generate appropriate flags. The IC features an internal bleeder for discharging the input capacitor of the DC/DC converter rapidly to ensure fast re-detection and port power-up, in case of a sudden removal and re-insertion of the Ethernet cable into the RJ-45. The advanced PWM current-mode section supports synchronous Flyback and Active Clamp Forward topologies, as well as Buck, Boost, and so on. Features The PD70211 device has the following key features. Supports IEEE 802.3af/at, HDBaseT, and other 2-pair/4-pair configurations Wall adapter support (Rear Aux method) PD detection and programmable classification 2, 3, 4, and 6 event classification Integrated 0.3 isolating (series-pass) FET Inrush current limiting Less than 10 A offset current during detection Advanced PWM section Lead-free QFN-36 (6 mm 6 mm) package Datasheet DS00003672B-page 1 2021 Microchip Technology Inc. and its subsidiaries PD70211 The following table lists the Microchip PD products offerings. Table 1. Microchip Powered Device Products Offerings Part Type Package IEEE IEEE HDBase UPoE 802.3af 802.3at T (PoH) PD70100 Front end 3 mm 4 mm 12L DFN x PD70101 Front end + PWM 5 mm 5 mm 32L QFN x PD70200 Front end 3 mm 4 mm 12L DFN x x PD70201 Front end + PWM 5 mm 5 mm 32L QFN x x PD70210 Front end 4 mm 5 mm 16L DFN x x x x PD70210A Front end 4 mm 5 mm 16L DFN x x x x PD70210AL Front end 5 mm 7 mm 38L QFN x x x x PD70211 Front end + PWM 6 mm 6 mm 36L QFN x x x x PD70224 Ideal Diode Bridge 6 mm x 8 mm 40L QFN x x x x Applications The following are the applications of the PD70211 device. HDBaseT up to 95 W IEEE 802.3af and IEEE 802at Power forwarding Indoor and outdoor PoE DS00003672B-page 2 Datasheet 2021 Microchip Technology Inc. and its subsidiaries