MAX5921AEVKIT Maxim Integrated, MAX5921AEVKIT Datasheet

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MAX5921AEVKIT

Manufacturer Part Number
MAX5921AEVKIT
Description
Hot Swap & Power Distribution Evaluation Kit for the MAX5920 MAX5921 MAX5939
Manufacturer
Maxim Integrated
Datasheet
1.MAX5921AEVKIT.pdf (6 pages)

Specifications of MAX5921AEVKIT

Product
Controllers & Switches
Supply Voltage - Max
80 V
Supply Voltage - Min
20 V
Operating Temperature Range
- 40 C to + 85 C
Power Dissipation
471 mW
Supply Current
0.7 mA
The MAX5921A evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount circuit board that pro-
vides current-limiting and multilevel fault protection
using the MAX5921A hot-swap controller. The EV kit
demonstrates the autoretry, configurable input under-
voltage, overvoltage, and overcurrent monitoring fea-
tures of the MAX5921A. The MAX5921A controls an
external N-channel MOSFET to provide load-current
regulation.
The EV kit circuit undervoltage and overvoltage thresh-
olds are configured to -32V and -80V, respectively, which
makes the EV kit well suited for -48V telecom systems.
The input operating voltage range is -20V to -80V
(-48V rail systems). The EV kit is designed to withstand
-100V input transients. The current-limiting threshold is
configured for 1.8A output current.
The EV kit can also be used to evaluate different ver-
sions of the MAX5920, MAX5921, or MAX5939 hot-
swap controllers after removing the MAX5921A.
The MAX5920A/B are pin- and function-compatible with
the LT4250 hot-swap controllers and pin-compatible
with LT1640.
Warning: The MAX5921A 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 connected 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 kit with care to
avoid possible personal injury.
The EV kit user should not probe the circuit with an
oscilloscope probe and ground clip unless they have
“high-voltage, hot-swap experience.”
19-2971; Rev 0; 8/03
Note: Please indicate that you are using the MAX5921A when contacting these component suppliers.
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.
Central Semiconductor
International Rectifier
IRC
Sanyo USA
TDK
SUPPLIER
________________________________________________________________ Maxim Integrated Products
General Description
631-435-1110
310-322-3331
361-992-7900
619-661-6322
847-803-6100
PHONE
MAX5921A Evaluation Kit
o Evaluates MAX5920A/B
o Withstands -100V Input Transients
o Circuit Breaker Immune to Input Voltage Steps
o Input Undervoltage/Overvoltage Thresholds
o Configured to 1.8A Output Current
o Demonstrates Unique Current Regulation
o Programmable Current Limit
o Programmable Output Undervoltage/Overvoltage
o Evaluates Other MAX5920/MAX5921/MAX5939
o Surface-Mount Components
o Fully Assembled and Tested
Note: To evaluate other versions of the MAX5920, MAX5921,
or MAX5939, request the desired free sample IC with the
MAX5921AEVKIT.
MAX5921AEVKIT
(LT1640/LT4250 Pin-Compatible)
and Current Spikes
Configured for -32V and -80V
Architecture
Monitoring
Hot-Swap Controllers (IC Replacement Required)
631-435-1824
310-726-8721
361-992-3377
619-661-1055
847-390-4405
PART
FAX
Component Suppliers
TEMP RANGE
Ordering Information
0°C to +70°C
www.centralsemi.com
www.irf.com
www.irctt.com
www.sanyovideo.com
www.component.tdk.com
WEBSITE
Features
8 SO
IC PACKAGE
1

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MAX5921AEVKIT Summary of contents

Page 1

... Monitoring o Evaluates Other MAX5920/MAX5921/MAX5939 Hot-Swap Controllers (IC Replacement Required) o Surface-Mount Components o Fully Assembled and Tested PART MAX5921AEVKIT Note: To evaluate other versions of the MAX5920, MAX5921, or MAX5939, request the desired free sample IC with the MAX5921AEVKIT. PHONE FAX 631-435-1110 631-435-1824 310-322-3331 310-726-8721 361-992-7900 361-992-3377 619-661-6322 ...

Page 2

MAX5921A Evaluation Kit Component List DESIGNATION QTY DESCRIPTION C1 0 Not installed, capacitor (0805) 0.015µF ±10%, 100V X7R C2 1 ceramic capacitor (0805) TDK C2012X7R2A153KT C3 0 Not installed, capacitor (16 x 16.5) 100µF ±20%, 100V electrolytic capacitor (16 x ...

Page 3

The EV kit circuit ensures that the input voltage is stable and within the undervoltage and overvoltage thresholds, which are configured to -32V and -80V, respectively. The circuit continually monitors the load current so that it does not exceed the ...

Page 4

MAX5921A Evaluation Kit Disable/Fault Reset The MAX5921A EV kit features a push-button switch SW1 to disable the EV kit output. When pressed, the switch connects the UV pin of the MAX5921A IC to -VIN and disables the EV kit output. ...

Page 5

D2 OPEN R4 604kΩ SW1 1% R5 14.3kΩ 10kΩ 4700pF -VIN -VIN Figure 1. MAX5921A EV Kit Schematic _______________________________________________________________________________________ MAX5921A Evaluation Kit R8 R7 100Ω 100kΩ 0.1µ ...

Page 6

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Figure 3. MAX5921A EV Kit PC Board Layout— ...

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