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reference designLT8277 | Demoboard EVAL-LT8277-AZ

Analog Devices LT8277 | Demoboard EVAL-LT8277-AZ

High Power Multiphase Step-Up Controller

Overview

TopologyBoost Converter
Input voltage9-36 V
Switching frequency100-2000 kHz
Output 160 V / 3 A

Description

Evaluation circuit EVAL-LT8277-AZ is a dual-phase non-synchronous high-power step-up converter featuring the LT8277. It regulates the output voltage up to 60V and drives up to a 3A load at 60V when the VIN is between 9V and 36V. The EVAL-LT8277-AZ runs at 200kHz switching frequency with the ability to turn on spread spectrum frequency modulation (SSFM) for reduced EMI emission. It can run with or without SPI communications. Multiple EVAL-LT8277-AZ can be paralleled to deliver more output power. A graphic user interface (GUI) is available when connected to a DC2026C Linduino One demo circuit.

Features

  • Wide Input Voltage Range: 3V to 40V
  • 2-Phase Interleaved Operation Reduces Input and Output Capacitance Requirements
  • SPI Interface for Output Voltage Adjustment
  • Low Shutdown Current < 1μA
  • Internal 5V Low Dropout Voltage Regulator Supplied from VIN or VOUT
  • PGOOD Output Status Reporting Pin
  • Programmable Internal Frequency: 100kHz to 2MHz
  • Frequency Synchronization
  • Clock Output for 4- or 8-Phase Operation
  • Spread Spectrum Frequency Modulation (SSFM) for EMI Reduction
  • Available in a 3mm × 4mm 20-Lead Side Solderable QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Typical applications

  • Automotive, Telecom, and Industrial Power Supplies

More information

Parts approved by Analog Devices

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(mm)
f(mm)
C
VR(V (DC))
Endurance(h)
IRIPPLE(mA)
Z(mΩ)
ILeak(µA)
DF(%)
Ø D(mm)
Packaging
Pins
Type
Mount
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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62000621121
SPECWR-PHD Pin Header, 6 mm, –
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
Length6 mm
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PackagingBag 
Pins6 
TypeStraight 
MountTHT 
Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
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702931000
SPECWA-SNSR Self-Retaining Spacer, 6.4 mm, 4.8 mm
Simu­lation–
Availability
–
Downloads3 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWA-SNSR Self-Retaining Spacer
Length6.4 mm
Drilling in Panel4.8 mm
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Operating Temperature -30 °C up to +85 °C
–Check availability
62000821121
SPECWR-PHD Pin Header, 8 mm, –
Simu­lation–
Availability
–
Downloads7 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
Length8 mm
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–
–
–
–
–
–
–
–
PackagingBag 
Pins8 
TypeStraight 
MountTHT 
Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
–Check availability
865080657018
SPECWCAP-ASLI Aluminum Electrolytic Capacitors, 10.5 mm, –
Simu­lation
Availability
–
Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWCAP-ASLI Aluminum Electrolytic Capacitors
Length10.5 mm
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Capacitance220 µF
Rated Voltage50 V (DC)
Endurance 2000
Ripple Current650 mA
Impedance230 mΩ
Leakage Current110 µA
Dissipation Factor12 %
Diameter10 mm
Packaging15" Tape & Reel 
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MountV-Chip SMT 
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Operating Temperature -55 °C up to +105 °C
–Check availability

Additional parts recommended by Würth Elektronik

Recommended parts are Würth Elektronik alternatives that are not formally approved for this reference design. Please verify it is suitable for your application, and contact us if you have any questions.

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Order Code
Data­sheet
Downloads
Status
Product series
L(µH)
ISAT(A)
RDC typ.(mΩ)
IRP,40K(A)
SamplesAvailability & Sample
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784373170100
SPECWE-LHCA Low Profile High Current Inductor, 10 µH, 26 A

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Availability
–
Downloads10 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-LHCA Low Profile High Current Inductor
Inductance10 µH
Saturation Current26 A
DC Resistance10 mΩ
Performance Rated Current16 A
–Check availability