DC786A Linear Technology, DC786A Datasheet

DC786A

Manufacturer Part Number

DC786A

Description

LTC4260CGN 200W Positive 48V Hot Swap Controller With Current And Voltage Monitoring (req DC590)

Manufacturer

Linear Technology

Series

-r

Datasheets

1.DC786A.pdf (8 pages)

2.DC786A.pdf (28 pages)

Specifications of DC786A

Main Purpose

Power Management, Hot Swap Controller

Embedded

Utilized Ic / Part

LTC4260

Primary Attributes

200W, 36 ~ 72 V

Secondary Attributes

I²C Interface

Kit Application Type

Power Management

Application Sub Type

Hot-Swap Controller

Kit Contents

Quick Eval Software

Lead Free Status / Rohs Status

Not applicable / Not applicable

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Download datasheet (892Kb)

BOARD LAYOUT

The top of the board contains the core Hot Swap con-

troller and associated components, along with LEDs.

Also on top are various configuration jumpers and all

connection turrets. The large turrets may be removed

to permit installation of up to 12 gauge wire for direct,

low resistance connections to the board. None of the

turrets are swaged.

The bottom of the board contains components for

software identification of the board, provision for A to

D converter input scaling dividers, I2C line LED driv-

FEATURES

APPLICATIONS

Configured for 200W, 36 to 72V

Provision for Short Pin Control of Turn-on

I2C Monitoring of Load Current, Input and Output

Voltage

I2C Control of Device Features and Reporting of

Device Status

Provision for On-Board Input and Output Bypassing

High Voltage Layout Enforces 60 mil Minimum

Spacing

LEDs Indicate +48V Input, +48V/5A Output, Power

Bad, Alert Status, and I2C Port Logic States

Input Clamping Included On Board

Servers, Routers, Switches

Mass Storage

Central Office Computing

Fan Trays

Controller with Current and Voltage

DESCRIPTION

Demonstration Circuit 786 showcases the

LTC

controller with I2C compatible monitoring in a 200W,

36 to 72V application. Included on board is an input

clamp and snubber, input and output voltage dividers

for UV, OV, and PWRGD, LEDs to indicate the

presence of various voltages and signals, high voltage

layout rules and turret terminals for critical signals to

facilitate evaluation in a working system.

A distinct line of demarcation runs the length of the

board, separating high voltage +48V referred

potentials from ground. Input and output connections

are made by 93 mil turrets which if removed,

accommodate insertion of up to 12 gauge wires for

in-situ testing. An I2C port designed to interface with

DC590A allows control of DC786A with LTC's Quick

Eval software.

Design files for this circuit board are available. Call

the LTC factory.

PowerPath are trademarks of Linear Technology Corporation.I2C is a trademark of Philips

Electronics N.V.

ers, and LED current limiting resistors. Also on the

bottom is the LTC4260CGN supply bypass capacitor,

C3, and space for optional input and output bypassing.

Except for C3, the other components are largely unre-

lated to the core application and are included for the

purposes of the demo board itself.

Thermal layout requirements for the FDB3632 MOSFET

are modest, as the maximum, continuous worst-case

dissipation is less than 600mW. Typical dissipation is

less than 150mW, resulting in a temperature rise of

less than 10°C.

, LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT and

4260CGN positive high voltage Hot Swap™

200W Positive 48V Hot Swap

QUICK START GUIDE

DEMO CIRCUIT 786

LTC4260CGN

Related parts for DC786A

DC786A Summary of contents

Page 1

... Input and output connections are made by 93 mil turrets which if removed, accommodate insertion gauge wires for in-situ testing. An I2C port designed to interface with DC590A allows control of DC786A with LTC's Quick Eval software. Design files for this circuit board are available. Call the LTC factory. ...

Page 2

... LTC4260 data sheet). CIRCUIT NOTES DC786A uses an 8mΩ, 5% sense resistor (R5). Cou- pled with the LTC4260's minimum current limit sense voltage threshold of 40mV, this guarantees a minimum current of 4.76A before the onset of current limiting or circuit breaker action. Thus 200W is available down to approximately 42V, dropping to ≅ ...

Page 3

In high current applications do not forget to upgrade Z1. If long leads are present between the LTC4260 and load bypassing, install 10µF or more bypassing at COUT to eliminate the chance of MOSFET oscillation and large negative excursions at ...

Page 4

BD_PRST\ and an I2C command to turn on. (OV and UV conditions must also be satisfied.) JP3 SDA: COM is the normal configuration, shorting SDAO and SDAI together. SPLIT allows adaptation to isolated systems; see data sheet Figure 13. JP4, ...

Page 5

... JP3 SDA: COM JP4 ADR0: LOW JP5 ADR1: LOW JP6 ADR2: LOW JP7 I2C PORT: Connect the DC786A to the DC590A USB controller board via 14-pin rib- bon cable and open the QuickEval software on the PC. Upon first connection, QuickEval will identify the DC786A and open the LTC4260 interface ...

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DC786A Linear Technology, DC786A Datasheet

DC786A

Specifications of DC786A

Related parts for DC786A

DC786A Summary of contents

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