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reference designLTC3887 | Demoboard DC2454A

Analog Devices LTC3887 | Demoboard DC2454A

LTC3887EUJ-1/LTC3870EUF-1 Poly-Phase Step-Down DC/DC Controller with Power System Management

Overview

TopologyBuck Converter
Input voltage7-14 V
Output 11.8 V / 100 A
IC revisionA

Description

Demonstration circuit 2454A is a high current, high efficiency,poly-phase synchronous buck converter featuringthe LTC®3887EUJ-1, a dual-phase current mode controller,and the LTC3870EUF-1, a dual-phase slave controller. TheLTC3887-1 has the PMBus interface and the power systemmanagement functions.The DC2454A uses DrMOS in the power stage and inductorDCR sensing. The input voltage range of this board is from7V to 14V, and the output voltage can be programmedfrom 0.8V to 1.8V. The output current is up to 100A with4-phase operation. The factory default setting for theoutput is 1.0V. This demo board also has an on-boarddynamic load circuit, which makes it easy to evaluate thetransient performances.The DC2454A powers up to default settings and producespower based on configuration resistors or NVM withoutthe need for any serial bus communication. This allowseasy evaluation of the DC/DC converter aspects of the LTC3887-1. To fully explore the extensive power systemmanagement features, download the GUI softwareLTpowerPlay® onto your PC and use LTC’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board.LTpowerPlay allows the user to reconfigure the part on thefly and store the configuration in EEPROM, view telemetryof voltage, current, temperature and fault status.

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Product series
f(mm)
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
2θ50% typ.(°)
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Qty.
Pins
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H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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744355215
SPECWE-HCI SMT Flat Wire High Current Inductor, –, –
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCI SMT Flat Wire High Current Inductor
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Inductance0.15 µH
Performance Rated Current56.4 A
Saturation Current @ 10%20 A
Saturation Current @ 30%60 A
DC Resistance0.58 mΩ
Self Resonant Frequency275 MHz
MaterialWE-PERM 
Packaging Unit800 
Pins2 
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MountSMT 
Length10.5 mm
Height4 mm
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Operating Temperature -40 °C up to +155 °C
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150060GS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, –, 525 nm
Simu­lation
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Downloads27 files

RAY files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
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Dominant Wavelength [typ.]525 nm
Emitting ColorGreen 
Peak Wavelength [typ.]515 nm
Luminous Intensity [typ.]430 mcd
Forward Voltage [typ.]3.2 V
Chip TechnologyInGaN 
Viewing Angle Phi 0° [typ.]140 °
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Packaging Unit4000 
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MountSMT 
Length1.6 mm
Height0.7 mm
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Operating Temperature -40 °C up to +85 °C
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702936000
SPECWA-SNSR Self-Retaining Spacer, 4.8 mm, –
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWA-SNSR Self-Retaining Spacer
Drilling in Panel4.8 mm
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MaterialPA66 
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Length15.9 mm
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Operating Temperature -30 °C up to +85 °C
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60800213421
SPECWR-PHD Jumper, –, –
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Packaging Unit1000 
Pins2 
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Rated Current3 A
Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
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62000311121
SPECWR-PHD Pin Header, –, –
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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Packaging Unit1000 
Pins3 
TypeStraight 
MountTHT 
Length6 mm
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Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
–Check availability