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reference designLTC2971 | Demoboard DC2875A

Analog Devices LTC2971 | Demoboard DC2875A

High Voltage Two 2-Channel PMBus Power System Managers with Four Power Supply Rails

Overview

TopologyBuck Converter
Input voltage4.5-60 V
Output 10.4 V
Output 20.3 V
Output 30.4 V
Output 40.3 V

Description

The DC2875A is a demonstration system for the LTC2971 Power System Manager that interfaces to various regulators. The board contains all the circuitry needed to demonstrate a power system that utilizes two 2-channel LTC2971 devices that manage four power supplies. The four power supplies include various switching regulators for the purpose of demonstrating a variety of methods to sense voltage and current. The demo board provides a sophisticated 4-channel digitally programmable power supply system.The LTC2971 is a 2-channel I2C/SMBus/PMBus Power System Manager that features accurate input current and energy measurement and is capable of managing ±60V supplies. The device monitors input current and input voltage, and calculates input power and energy. The DC2875A demonstrates the ability of the LTC2971 to sequence, trim, margin, supervise, monitor, and log faults for four power supplies. The LTC2971 monitors each channel’s output voltage and output current and also monitors each channel’s external temperature sensor and its own internal die temperature.The DC2875A board contains four independent power supply rails. All four rails are based on DC/DC switching regulators. The +36V and +32V channels are managed by an LTC2971 and the ±24V channels are managed by an LTC2971-1. The board is pre-configured with these voltages and may be re-configured with feedback resistors.

Features

  • Sequence, Trim, Margin, and Supervise Four Power Supplies
  • Manage Faults, Monitor Telemetry, Create Fault Logs
  • PMBus Compliant Command Set
  • Supported by LTpowerPlay GUI
  • Margin or Trim Supplies to 0.25% Accuracy
  • Four IOUT and Two IIN Monitors
  • Input Power Measurement and Energy Accumulation
  • Fast OV/UV Supervisors per Channel
  • Multi-Channel Fault Management
  • Automatic Fault Logging to Internal EEPROM
  • Operates Autonomously without Additional Software
  • Monitors: Voltage, Current, Power, Temperature
  • 2-Channel Time-Based Output Sequencer
  • I2C/SMBus Serial Interface
  • Powered from 8V to 18V

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
2θ50% typ.(°)
C
Tol. C
VR(V (DC))
Size
DF(%)
RISO
Ceramic Type
W(mm)
Fl(mm)
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
VOP(V)
ISAT(A)
RDC max.(mΩ)
Version
ISAT,10%(A)
L1(µH)
L2(µH)
IR(A)
IR 2(A)
ISAT(A)
RDC1 typ(Ω)
RDC2 typ(Ω)
RDC1 max(Ω)
RDC2 max(Ω)
fres(MHz)
Type
Pins
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
Packaging
SamplesAvailability & Sample
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150060BS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 470 nm, Blue
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Downloads28 files

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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
Dominant Wavelength [typ.]470 nm
Emitting ColorBlue 
Peak Wavelength [typ.]465 nm
Luminous Intensity [typ.]145 mcd
Forward Voltage [typ.]3.2 V
Chip TechnologyInGaN 
Viewing Angle Phi 0° [typ.]140 °
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Size0603 
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Width0.8 mm
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Length1.6 mm
Height0.7 mm
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Operating Temperature -40 °C up to +85 °C
PackagingTape and Reel 
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150060GS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green
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Downloads27 files

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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
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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Size0603 
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Width0.8 mm
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Length1.6 mm
Height0.7 mm
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Operating Temperature -40 °C up to +85 °C
PackagingTape and Reel 
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150060SS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 630 nm, Super Red
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Downloads27 files

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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear
Dominant Wavelength [typ.]630 nm
Emitting ColorSuper Red 
Peak Wavelength [typ.]645 nm
Luminous Intensity [typ.]60 mcd
Forward Voltage [typ.]1.9 V
Chip TechnologyAlInGaP 
Viewing Angle Phi 0° [typ.]140 °
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Size0603 
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Width0.8 mm
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Length1.6 mm
Height0.7 mm
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Operating Temperature -40 °C up to +85 °C
PackagingTape and Reel 
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744777147
SPECWE-PD SMT Power Inductor, –, –
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
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Size7345 
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Width7.3 mm
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Inductance47 µH
Performance Rated Current1.8 A
Saturation Current @ 30%1.35 A
DC Resistance170 mΩ
Operating Voltage120 V
Saturation Current1.1 A
DC Resistance260 mΩ
VersionStandard 
Saturation Current @ 10%1.1 A
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Self Resonant Frequency10.5 MHz
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Pins2 
MountSMT 
Length7.3 mm
Height4.5 mm
Rated Current1.03 A
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Operating Temperature -40 °C up to +125 °C
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–Check availability
7447785133
SPECWE-PD SMT Power Inductor, –, –
Simu­lation
Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
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Size6033 
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Width6.2 mm
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Inductance33 µH
Performance Rated Current1.05 A
Saturation Current @ 30%1.05 A
DC Resistance340 mΩ
Operating Voltage120 V
Saturation Current0.9 A
DC Resistance400 mΩ
VersionRobust 
Saturation Current @ 10%0.9 A
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Self Resonant Frequency17 MHz
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MountSMT 
Length5.9 mm
Height3.3 mm
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Operating Temperature -40 °C up to +125 °C
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–Check availability
74438335330
SPECWE-MAPI SMT Power Inductor, –, –
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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Size3015 
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Width3 mm
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Inductance33 µH
Performance Rated Current0.7 A
Saturation Current @ 30%1.7 A
DC Resistance1210 mΩ
Operating Voltage80 V
Saturation Current1.3 A
DC Resistance1330 mΩ
VersionSMT 
Saturation Current @ 10%0.9 A
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Self Resonant Frequency10 MHz
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Pins2 
MountSMT 
Length3 mm
Height1.5 mm
Rated Current0.5 A
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Operating Temperature -40 °C up to +125 °C
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–Check availability
74437368330
SPECWE-LHMI SMT Power Inductor, –, –
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Availability
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Downloads8 files

Status
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iProduction is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
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Size1040 
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Width10 mm
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Inductance33 µH
Performance Rated Current3.75 A
Saturation Current @ 30%7.4 A
DC Resistance92 mΩ
Operating Voltage120 V
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DC Resistance112 mΩ
VersionSMT 
Saturation Current @ 10%3.3 A
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Self Resonant Frequency6 MHz
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MountSMT 
Length11 mm
Height3.8 mm
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Operating Temperature -40 °C up to +125 °C
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–Check availability
744877101
SPECWE-DD SMT Shielded Coupled Inductor, –, –
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Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
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Product seriesWE-DD SMT Shielded Coupled Inductor
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Size7345 
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Width7.3 mm
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Inductance100 µH
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Operating Voltage80 V
Saturation Current0.9 A
DC Resistance1300 mΩ
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Inductance 1100 µH
Inductance 2100 µH
Rated Current0.65 A
Rated Current 20.65 A
Saturation Current0.9 A
DC Resistance 11.029 Ω
DC Resistance 21.029 Ω
DC Resistance 11.3 Ω
DC Resistance 21.3 Ω
Self Resonant Frequency4 MHz
TypeStraight 
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Length7.3 mm
Height4.8 mm
Rated Current0.65 A
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Operating Temperature -40 °C up to +125 °C
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–Check availability
885012106012
SPECWCAP-CSGP MLCCs 10 V(DC), –, –
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Product seriesWCAP-CSGP MLCCs 10 V(DC)
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Capacitance4.7 µF
Capacitance±20% 
Rated Voltage10 V (DC)
Size0603 
Dissipation Factor10 %
Insulation Resistance0.02 GΩ
Ceramic TypeX5R Class II 
Width0.8 mm
Pad Dimension0.4 mm
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Length1.6 mm
Height0.8 mm
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Operating Temperature -55 °C up to +85 °C
Packaging7" Tape & Reel 
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60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Insulation Resistance1000 MΩ
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Pins2 
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Rated Current3 A
Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
PackagingBag 
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62000311121
SPECWR-PHD Pin Header, –, –
Simu­lation–
Availability
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Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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Insulation Resistance1000 MΩ
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TypeStraight 
Pins3 
MountTHT 
Length6 mm
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Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
PackagingBag 
–Check availability