Datasheet

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1 Description
The TPS23756EVM allows reference circuitry evaluation of the TPS23756. It contains input and output
power connectors and an array of onboard test points for circuit evaluation.
1.1 Features
• High-power PD and DC-DC converter controllers
– IEEE 802.3at-compliant PD controller with adapter preference support
– Converter controller supports high-efficiency, isolated converter topologies
• Wide-input voltage range DC-DC converter
– Active clamp forward converter design using self-driven synchronous rectifiers
– End-to-end efficiency at full load: 89% (12 V), 91% (24 V), 88% (48 V), 85% (PoE)
– Converter efficiency at full load: 91% (12 V), 91% (24 V), 88% (PoE or 48 V)
– 5-V, 5-A output (25 W) over a 10- to 57-V input voltage range
• Operates from PoE or external adapters
– Integrated 1000base-T RJ-45 jack including transformer and cable terminations
– Operates from 12-V, 24-V, and 48-V wall adapters
– Onboard, “efficient diode” (replaces standard adapter diode) circuit when operating from 12-V
adapters
– Selection of option 1 (PD input using PPD pin) or option 2 (converter input using APD pin) adapter
input power using jumpers
– Selection of PPD1 or PPD2 mode using jumpers
– Supports option 2 adapter input with either PoE or adapter preference
– Onboard “smooth handoff” circuit for 48-V adapter using PoE as a hot backup
1.2 Applications
• Voice over Internet Protocol – IP telephones
• Wireless LAN – Wireless Access Points
• Security – Wired IP cameras
2
TPS23756EVM SLVU329A–September 2009–Revised March 2010
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