You just got a big product out the door and are enjoying some well-deserved downtime when your product manager decides to swing by. Surprise, surprise: he wants the next-generation product to have more features and a smaller form factor. Luckily, you may be able to squeeze out some area from your Power over Ethernet (PoE) powered device (PD) solution.
If you’re after power density, consider the following when choosing a new PoE PD controller:
TI’s newly released TPS23755 is a Type 1 (limited to 13W of input power) PoE PD device that checks all of the above boxes.
Figure 1 shows a visual comparison between a 12-V, 1-A solution for the TPS23753A vs. the new TPS23755 solution. Note that the figure does not include the EMI filter. The TPS23753A operates in CCM mode and integrates the PoE PD (integrated FET) with a DC/DC controller. The TPS23755 adds the integrated switching FET, PSR, advanced startup and SSFD.
Figure 1: Board Space comparison for TPS23755 vs. TPS23753
To appease your product manager and squeeze out some area from your PoE PD solution, consider evaluating TI’s TPS23755 evaluation module for IEEE 802.3at Type 1 PoE PD applications and “IEEE 802.3at Type-1 PoE and 12-V adapter input to point of load reference design for IP network camera” to get started with your Type 1 PoE design. For applications requiring 5V output consider evaluating TI’s TPS23758 evaluation module for IEEE 802.3at Type 1 PoE PD applications.
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