TI TPS2372具有自动 MPS的IEEE 802．3bt PoE高功率PD接口解决方案
TI公司的TPS2372是有自动 MPS的IEEE 802.3bt PoE高功率PD接口,具有实现 IEEE802.3at 或 IEEE802.3bt（草案）（1-4 类）用电设备 (PD) 所需的所有特性,支持高达 90W和60W 的高功率应用,使用100米CAT5线缆的情况下,这相当于PD 输入端为 71.3W 和 51W, 适用于3类或4类PoE的IEEE 802.3bt(草案)PD 解决方案.主要用在IEEE 802.3bt (Draft)兼容设备,照明,功率模块,4PPOE,安全摄像机,多波段接入系统.本文介绍了TPS2372主要特,功能框图和应用电路,以及评估板TPS2372-3EVM-757主要特性和电性能指标,电路图,材料清单和PCB设计图.
The TPS2372 contains all of the features needed toimplement an IEEE802.3at or IEEE802.3bt (draft)(Type 1-4) powered device (PD). The low internalswitch resistance allows the TPS2372-4 andTPS2372-3 to support high power applications up to90 W and 60 W respectively. Assuming 100-meterCAT5 cable, this translates into 71.3 W and 51 W atPD input.
The TPS2372 operates with enhanced features.The Automatic MPS function enables applicationsrequiring very low power standby modes. TheTPS2372 automatically generates the necessarypulsed current to maintain the PSE power. Anexternal resistor is used to enable this functionalityand to program the MPS pulsed current amplitude.
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