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reference designLTC7851 | Demoboard DC2380A-C

Analog Devices LTC7851 | Demoboard DC2380A-C

High Output Current 4-Phase Step-Down Converter

Overview

TopologyBuck Converter
Input voltage7-14 V
Output 11.2 V / 120 A
IC revisionA

Description

Demonstration circuit DC2380A features the LTC®7851,a high performance 4-phase voltage mode controller, inthe following high output current step-down converters:DC2380A-A: 1.8V/30A, 1.5V/30A, 1.2V/30A and 1.0V/30ADC2380A-B: 1.8V/60A Dual Phase and 1.2V/60A Dual PhaseDC2380A-C: 1.2V/120A 4-PhaseThe above converters provide a maximum per phasecurrent of 30A while operating at a frequency of 400kHzover an input voltage range of 7V to 14V. The powerstage of each phase consists of a 5mm × 5mm DrMOSand 0.25μH/0.325mΩ inductors. The PWM outputs of theLTC7851 drive each DrMOS and DCR sensing is employedto sense the inductor current. The LTC7851’s integratedcurrent share circuit provides highly accurate currentsharing in the DC2380A-B and DC2380A-C converters.These demo boards use a high density, two sided layoutwhich places the power stage on the top and the controlcircuit on the bottom. The LTC7851 and DrMOS are biasedby an onboard LT3970 buck converter.Additional features of this demo board include:n Remote Sensingn CLKIN and CLKOUT Pinsn PGOOD, RUN and TRACK/SS Pinsn Dynamic Load CircuitThe LTC7851 data sheet provide a complete descriptionof the IC operation and application information. The datasheet must be read in conjunction with the quick start guide.

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Data­sheet
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Product series
f(mm)
VOP(V)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
Pins
Type
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
Packaging
SamplesAvailability & Sample
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744301025
SPECWE-HCM SMT High Current Flat Wire Inductor, –, 80 V
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Availability
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Downloads8 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
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Operating Voltage80 V
Performance Rated Current56 A
Saturation Current @ 10%70 A
Saturation Current @ 30%76 A
DC Resistance0.3 mΩ
Self Resonant Frequency29 MHz
MaterialMnZn 
Pins2 
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MountSMT 
Length11.3 mm
Height8.9 mm
Rated Current38 A
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Operating Temperature -40 °C up to +125 °C
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702936000
SPECWA-SNSR Self-Retaining Spacer, 4.8 mm, –
Simu­lation–
Availability
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Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction 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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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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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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Pins3 
TypeStraight 
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