Datasheet

Introduction

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1 Introduction

This EVM allows reference circuitry evaluation of the TPS23752 PD controller, DC/DC controller, and

sleep mode functionality.

1.1 Features

• High-efficiency synchronous-flyback design including enhanced light-load operation (with synchronous

rectifier disable and variable frequency operation)

• Sleep mode capability including PSE DC and Pulsed MPS signature, wake, and status LED

• 24- and 48-V adapter input capability

• Gigabit Ethernet pass-through interface

• IEEE 802.3at type-2 hardware classification with secondary side status flag (T2P) and LED

• Robust 100-V, 0.5-Ω, internal-hotswap MOSFET

• 5-V, 5-A, 25-W dc output

1.2 Applications

• IEEE 802.3at-compliant devices

• Video and VoIP telephones

• Multiband access points

• Security cameras

• Pico-base stations

2 Electrical Specifications

Table 1. TPS23752EVM-145 Electrical and Performance Specifications

Parameter Test Conditions Min Typ Max Unit

POWER INTERFACE

Input Voltage Applied to the power pins of connectors J1 or J3 0 57 V

Rising input voltage 40

Input UVLO, PoE input J1 V

Falling input voltage 30

Input UVLO, adapter J3 Rising input voltage 18.7 V

Detection voltage At device terminals 1.4 10.1 V

Classification voltage At device terminals 11.9 23.0 V

Classification current Rclass = 63.4 Ω 38 42 mA

Inrush current-limit 100 180 mA

Operating current-limit 850 1200 mA

DC/DC CONVERTER

21.6V ≤ Vin ≤ 57 V,

Output voltage 5-V output 4.85 5.00 5.15 V

ILOAD ≤ ILOAD (max)

Output current 21.6V ≤ Vin ≤ 57 V 5-V output 5.0 A

Output ripple voltage, peak-to-peak Vin = 44 V, ILOAD = 5 A 5-V output 30 mV

Efficiency, dc-dc converter Vin = 54 V, ILOAD = 5 A 5-V output 93%

Efficiency, end-to-end Vin = 54 V, ILOAD = 5 A 5-V output 90%

Switching frequency PWM mode 225 275 kHz

TPS23752EVM-145: Evaluation Module for TPS23752 SLVU753–July 2012

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