This reference design represents a PoE Class 8 converter designed for high efficiency conversion over a wide load range. It is based on the PM8805 PoE-PD interface compliant with the IEEE802.3bt standard, and a DC-DC forward active clamp converter driven by the PM8804 PWM controller.
The PM8805 system on package device embeds two active bridges and an IEEE802.3bt compliant Powered Device (PD) interface. It can be used in all medium-to-high power 2P and 4P high efficiency PoE and PoE+ applications such as point of sales and retail logistics devices.
The PM8804 PWM controller represents an integrated solution for a smart and efficient 48 V converter, including a programmable oscillator for the switching frequency, adjustable slope compensation, dual complementary low-side drivers with programmable dead time, programmable soft start, soft turn off and a programmable current sense blanking time.
主要特性
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| 器件 | 类型 | 描述 | 数据手册 |
|---|---|---|---|
| PM8804 | 以太网供电IC | PoE和电信系统的PWM峰值电流模式控制器 | 点击下载 |
| PM8805 | 以太网供电IC | 具有嵌入式双有源桥的IEEE 802.3bt PoE-PD接口 | 点击下载 |
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