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General Description

The MAX5051 evaluation kit (EV kit) is a fully assembled

and tested circuit board that contains a high-efficiency,

50W, isolated, synchronously rectified forward convert-

er in the industry-standard 1/8th brick pinout. The cir-

cuit is configured for a +3.3V output voltage and pro-

vides up to 15A of output current. The circuit can be

powered from either a +36V to +72V or -36V to -72V DC

source used in the telecom/datacom markets (48V

modules), industrial environments, or in automotive 42V

power systems.

Up to 91% high efficiency is achieved at 10A using a

clamped, two-transistor power topology on the primary

side and synchronous rectifiers on the secondary side.

Part of the efficiency improvement is due to the recov-

ery of stored leakage and magnetizing inductance

energy at the primary side. On the secondary side, high

efficiency is achieved through synchronous rectifica-

tion. Up to 500V galvanic isolation is achieved by opto-

couplers and a planar surface-mount transformer.

Operation at 250kHz allows the use of small magnetics

and output capacitors. The EV kit provides cycle-by

cycle current-limit protection. Integrating fault protec-

tion provides additional steady-state fault protection

that reduces average dissipated power during continu-

ous short-circuit conditions. The MAX5051 also has a

programmable undervoltage lockout (UVLO).

Warning: The MAX5051 EV kit is designed to operate

with high voltages. Dangerous voltages are present on

this EV kit and on equipment connected to it. Users

who power up this EV kit or power the sources connect-

ed to it must be careful to follow safety procedures

appropriate to working with high-voltage electrical

equipment.

Under severe fault or failure conditions, this EV kit may

dissipate large amounts of power, which could result in

the mechanical ejection of a component or of compo-

nent debris at high velocity. Operate this EV kit with

care to avoid possible personal injury.

Features

♦ 50W, High-Efficiency, Isolated Forward Converter

♦ Synchronous Rectified

♦ ±36V to ±72V Input Range

♦ +3.3V Output at 15A

♦ V

OUT

Regulation Better than 0.5% Over Line and

Load

♦ 91% Efficiency at 3.3V/10A Output

♦ Cycle-by-Cycle Current-Limit Protection

♦ Programmable Integrating Fault Protection

♦ 1/8th Brick Module Pinout

♦ 250kHz Switching Frequency

♦ Soft-Start

♦ Remote Output Voltage Sense

♦ Output Voltage Trim Pin

♦ Fully Assembled and Tested

Evaluates: MAX5051

MAX5051 Evaluation Kit

________________________________________________________________ Maxim Integrated Products 1

19-2986; Rev 0; 9/03

Component List

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART TEMP RANGE IC PACKAGE

MAX5051EVKIT 0°C to +50°C* 28 TSSOP

DESIGNATION QTY DESCRIPTION

C1 1

100pF ±2%, 50V C0G ceramic

capacitor (0603)

Murata GRM1885C1H101GA01D

C2 1

390pF ±5%, 50V C0G ceramic

capacitor (0603)

Taiyo Yuden UMK107CH391JZ

C3 1

4.7µF ±10%, 10V X5R ceramic

capacitor (0805)

TDK C2012X5R1A475K

C4 1

4.7µF ±10%, 6.3V X5R ceramic

capacitor (0805)

TDK C2012X5R0J475K

C5 1

4700pF ±10%, 50V X7R ceramic

capacitor (0603)

TDK C1608X7R1H472K

*With 100LFM airflow.

1 2 3 4 5 6 ... 10 11

Indice de contenidos

Pagina 1 - MAX5051 Evaluation Kit

General DescriptionThe MAX5051 evaluation kit (EV kit) is a fully assembledand tested circuit board that contains a high-efficiency,50W, isolated, syn

Pagina 2

Evaluates: MAX5051MAX5051 Evaluation Kit10 ______________________________________________________________________________________Figure 15. MAX5051 EV

Pagina 3

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses arei

Pagina 4

Evaluates: MAX5051MAX5051 Evaluation Kit2 _______________________________________________________________________________________Component List (conti

Pagina 5

Quick StartRequired Equipment• ±36V to ±72V power supply capable of providing upto 3A • Voltmeter • A fan to provide at least 100LFM airflow for exten

Pagina 6

Evaluates: MAX50514) Connect a 100µF, 100V bulk storage capacitor tothe top of the +VINand -VINpins.5) Connect the positive terminal of a 36V to 72V p

Pagina 7

The maximum output current should be limited to lessthan 15A. The usable output voltage range for the EVkit is +2.6V to +4.0V. Additionally, U3, U2, a

Pagina 8

Evaluates: MAX5051MAX5051 Evaluation Kit6 _______________________________________________________________________________________6065757085908095EFFIC

Pagina 9

Evaluates: MAX5051MAX5051 Evaluation Kit_______________________________________________________________________________________ 71ms/divVOUT100mV/divI

Pagina 10

Evaluates: MAX5051MAX5051 Evaluation Kit8 _______________________________________________________________________________________00.53.01.53.54.0INPUT

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Evaluates: MAX5051MAX5051 Evaluation Kit_______________________________________________________________________________________ 9-VINC250.047µF100VC35