ZHCS845A March 2012 – July 2015 TPS2379
PRODUCTION DATA.
| PIN | I/O | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| VDD | 1 | I | Connect to positive PoE input power rail. Bypass with 0.1 µF to VSS. |
| DEN | 2 | I/O | Connect 24.9 kΩ to VDD for detection. Pull to VSS disable pass MOSFET. |
| CLS | 3 | O | Connect resistor from CLS to VSS to program classification current. |
| VSS | 4 | — | Connect to negative power rail derived from PoE source. |
| RTN | 5 | O | Drain of PoE pass MOSFET. |
| CDB | 6 | O | Opendrain converter disable output, active low, referenced to RTN. |
| T2P | 7 | O | Active low indicates type 2 PSE connected. |
| GATE | 8 | O | Auxiliary gate driver output. |
| PowerPAD | — | — | The PowerPAD must be connected to VSS. A large fill area is required to assist in heat dissipation. |