ZHCSJ10B September 2006 – November 2018 TPS2376-H
PRODUCTION DATA.
The TPS2376-H incorporates an undervoltage lockout (UVLO) circuit that monitors line voltage to determine when to apply power to the downstream load and allow the PD to power up. The IEEE 802.3af specification dictates a maximum PD turn on voltage of 42 V and a minimum turn-off voltage of 30 V shown in Figure 12. The UVLO pin provides the flexibility to adjust the turn on and turn off to the IEEE 802.3af limits, or a custom set. Design the turn-on for 39.5 V if a design which uses the IEEE 802.3af limits is desired.