This reference design implements a Power-over-Ethernet (PoE) power device (PD) active-clamp forward converter with 24V and 3A output. A TPS23730 PD with integrated pulse-width modulator (PWM) controller provides the necessary functions for the PoE PD and PWM control for the active-clamp forward converter. This design uses secondary-side regulation (SSR) with an optocoupler feedback. An external hot swap is added to enable Class-7 and 8 PD applications. INA237 is used on the primary side to monitor the DC/DC input voltage and current, and the power information is sent to the secondary side by either I2C isolator or optocoupler-based circuits.
| Output voltage options | PMP23365.1 |
|---|---|
| Vin (Min) (V) | 37 |
| Vin (Max) (V) | 57 |
| Vout (Nom) (V) | 24 |
| Iout (Max) (A) | 3 |
| Output Power (W) | 72 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Forward- Active Clamp |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
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Design file that contains information on physical board layer of design PCB
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Class 8 PoE PD Reference Design (24V, 3A) with External Hotswap and Telemetry | PDF | HTML | Mar. 04, 2024 |
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