BCM59011A0KMLG - PoE PSE Controller, 30W, 1-Ch | Broadcom

Enterprise Ethernet Switch Line Cards

The BCM59011A0KMLG fits Ethernet switch line cards that deliver inline power to access points, IP phones, and cameras on each port. As a single-channel PSE controller rated 30W per port with no internal switch FETs, one device supervises one port's detection, classification, and fault protection, and an eight-port card integrates eight devices sharing a common power rail. Because the power path uses an external MOSFET and sense resistor, designers size the FET RDS(on) and copper area for the full 30W continuous budget, typically adding bulk capacitance at the port and fast current-limit response to survive cable shorts. The controller approach also lets the line card's MCU or PoE management FPGA coordinate per-port budgets. Note the part is obsolete - suitable for maintaining existing line cards, not new designs.

PoE Midspan Injectors

Midspan injectors add power to an existing data-only Ethernet link, and the BCM59011A0KMLG serves as the per-port PSE controller governing detection, classification, and delivery of up to 30W into the cable. In a midspan, the controller's external-MOSFET architecture is convenient because the data path remains untouched while the power insertion stage carries only DC - the external FET isolates the 48V-class supply from the PD until a valid detection signature is measured. Designers must observe the required detection and classification timing to avoid damaging legacy non-PoE devices, and the controller's fault monitoring provides overcurrent protection if the cable or PD fails. For midspan products still in production, migrate to the active BCM59141A0KMLG instead of this obsolete device.

IP Surveillance Camera Power Feeds

Network video recorders and surveillance switches use PoE PSE controllers such as the BCM59011A0KMLG to power fixed and PTZ cameras over the Ethernet cable, eliminating separate power cabling at each camera position. The 30W per-port maximum covers the higher draw of PTZ cameras with heaters and zoom mechanisms, while the controller's per-channel supervision isolates a faulty camera without disturbing other ports on the same NVR. Detection and classification ensure cameras are powered only after a valid signature is measured, protecting legacy analog-to-IP transition equipment. Its external power-MOSFET design lets NVR makers spread thermal dissipation across discrete FETs on the chassis. Because the BCM59011A0KMLG is obsolete, new NVR platforms should specify the active BCM59141A0KMLG.

Wireless Access Point Infrastructure

Enterprise and campus Wi-Fi deployments rely on switch ports that deliver power to ceiling-mounted access points, and the BCM59011A0KMLG's 30W single-channel PSE function supports the multi-radio access point class, which draws more than basic 15W telephony loads. The controller performs signature detection and classification before applying power, then supervises current during operation; if an access point is swapped during maintenance, the port re-detects and re-classifies automatically. The external-FET power stage allows the switch designer to optimize efficiency across the many ports of a campus aggregation switch, reducing total heat in the wiring closet. For new aggregation platforms, Broadcom's active BCM59141A0KMLG is the recommended successor to this obsolete device.

VoIP Phone and Office Connectivity

Office Ethernet switches power IP desk phones, door controllers, and lighting sensors over the same Cat5e cabling used for data, and the BCM59011A0KMLG provides the PSE-side control for such ports with its 30W maximum power class. A single controller per port applies power only after valid detection, protecting non-PoE legacy devices that may still be plugged into office jacks, and its fault supervision limits current if a cable is damaged. The external MOSFET arrangement is economical for high-port-count office switches because FET cost and thermal footprint scale with actual port power needs. Distributor inventory indicates the part serves the repair market for deployed office switches; new designs should adopt the active BCM59141A0KMLG.

Industrial Networking Equipment

Industrial Ethernet switches and gateways installed in factories power cameras, wireless nodes, and sensor aggregators over Ethernet, and the BCM59011A0KMLG's 30W PSE controller function supports those port-power requirements. Its controller-only architecture lets industrial equipment makers choose high-reliability external MOSFETs rated for wide temperature operation while the IC supervises detection, classification, overcurrent, and disconnection behavior per port. Per-channel independence is valuable in industrial cabinets where one shorted cable run must not take down the network's power budget. Given the obsolete status confirmed by multiple distributor sources, industrial OEMs should qualify the active Broadcom BCM59141A0KMLG for new platforms and use remaining BCM59011A0KMLG stock only for service spares with full traceability.