4-Port PoE Manager

Microsemi Proprietary and Confidential. PD69104B1/F Datasheet Revision 2.0

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Product Overview

Microsemi’s PD69104B1/F Power over Ethernet (PoE) Manager enables network devices to share power

and data over a single cable. PD69104B1/F PoE-Manager chip is employed by both Ethernet switches

and midspans. The device integrates power, analog circuitry, and state-of-the-art control logic into a

single 48-pin plastic quad flat no-leads (QFN) package.

PD69104B1/F device is a four-port, mixed-signal, high-voltage PoE Manager. PD69104B1/F supports the

following modes of operation.

MSCC extended auto mode—A stand-alone mode in which the PD69104B1/F detects IEEE 802.3AF-

2003 compliant powered devices (PDs) and IEEE 802.3AT-2009 high-power devices, ensuring safe

power feeding and disconnection of ports based on a power management algorithm while

employing a minimum of external components.

Semi auto mode—Allows the host to control which devices are powered and which are not, as well

as communicate with PD69104B1/F and configuring it.

PD69104B1/F executes all real time functions as specified in IEEE 802.3AF-2003 (AF) and IEEE 802.3AT

high power (AT) standards. This includes load detection, AF and AT classifications. In addition, the

PD69104B1/F device features Multiple Classification Attempts (MCA) port status monitoring.

PD69104B1/F supports detection of legacy/pre-standard PD devices. It also provides PD real-time

protection through the following mechanisms: overload, under-load, over-voltage, over-temperature,

and short-circuit. PD69104B1/F supports supply voltages between 44 V and 57 V, with no need for

additional power supply sources, and has built-in thermal protection.

PD69104B1/F is a low-power device that uses internal MOSFETs and external 0.36 Ω sense resistors.

PD69104B1/F is available in a 48 lead, 8 mm × 8 mm QFN package.

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Features

Supports IEEE 802.3AF and IEEE 802.3AT, including two-event classifications

MSCC extended auto and semi auto

Supports pre-standard PD detection

Supports Cisco device detection

Single DC voltage input (44 V to 57 V)

Wide temperature range: –10 °C to 85 °C

PD69104B1/F version covering –40 °C to 85 °C

Low-power dissipation (0.36 Ω sense resistor)

Drives independent 4/2-pairs power port

Supports Extended PoE Protocol and Register Map

Includes two selectable communication modes (I²C and UART)

Includes reset command pin integrated with an RPD/MRPD mechanism

Continuously monitoring port and system data

Parameter setting using input pins

Parameters setting from external serial EEPROM device

Built-in dynamic power management and emergency power management mechanisms with 3 x

power supply power-good pins

Power soft start mechanism

On-chip thermal protection

On-chip continual thermal monitoring

Voltage/current and temperature monitoring/protection

Built-in 3.3 V and 5 V regulators

Internal power on reset

MSL 3

RoHS compliant