PD39208 Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
The Microchip PD39208 is a Power over Ethernet (PoE) PSE manager IC providing centralized power delivery management for multi-port IEEE 802.3af/at/bt PoE systems with up to 8 ports. It integrates port detection, classification, and power budget management in a compact QFN package. Used in enterprise switches, industrial PoE hubs, and IP camera infrastructure requiring intelligent per-port power control.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 57
- Lifecycle
- ACTIVE
- Datasheet
- PD39208 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-port PoE PSE manager supporting IEEE 802.3af/at/bt for up to 90 W per port under 802.3bt
- Integrated per-port detection, classification, and power budget management reducing external logic
- Compact QFN package enabling dense multi-port PoE controller implementations on switch line cards
- Intelligent power budget allocation preventing overload across connected powered devices
- Compatible with Microchip PD69xxx PSE controller family for scalable PoE system architectures
Applications
The PD39208 manages PoE power delivery across up to 8 Ethernet ports in enterprise switches, industrial PoE injectors, and IP surveillance systems operating at supply voltages from 44 V to 57 V. Its centralized power budget management enables designers to maximize total system PoE capacity while protecting against oversubscription in high-density port configurations. It is also integrated into smart building infrastructure controllers and industrial automation panels where IEEE 802.3bt Type 3 or Type 4 power delivery at up to 90 W per port is required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many PoE ports does the Microchip PD39208 manage and what PoE standards does it support?
The PD39208 manages up to 8 PoE ports with support for IEEE 802.3af (15.4 W), IEEE 802.3at (30 W), and IEEE 802.3bt (up to 90 W per port) standards. Its integrated detection and classification logic handles per-port power negotiation automatically, reducing firmware complexity in managed switch designs.
How does the PD39208's centralized power budget management benefit high-density PoE switch designs?
Centralized power budget management across 8 ports allows the PD39208 to dynamically allocate available power from a shared 44 V to 57 V supply, preventing oversubscription when multiple high-power 802.3bt devices connect simultaneously. This avoids nuisance port shutdowns and allows the total system PoE budget of hundreds of watts to be used efficiently across variable loads.
Which industrial or enterprise infrastructure applications are primary targets for the PD39208 PSE manager?
Enterprise Ethernet switches, industrial PoE hubs, IP camera infrastructure, and building automation controllers are primary deployment targets. The PD39208 enables 8-port PSE designs to power IP cameras at 25 W each, VoIP phones at 15 W each, or high-power access points at up to 90 W under 802.3bt Type 4, within a single managed power domain.
When would a designer choose the PD39208 over individual single-port PSE controllers for an 8-port switch design?
A centralized 8-port PSE manager like the PD39208 reduces IC count from 8 individual single-port controllers to one device, lowering BOM cost, PCB area, and I2C bus traffic. It also provides system-level power budget enforcement across all 8 ports simultaneously, which individual controllers at each port cannot coordinate without additional external arbitration logic operating at bus speeds above 100 kHz.
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