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reference designLT8365 | Demoboard DC2840A

Analog Devices LT8365 | Demoboard DC2840A

Low IQ Boost/SEPIC/Inverting Converter with 1.5A, 150V Switch

Overview

TopologySEPIC Buck-Boost Topology
Input voltage9-30 V
Output 1255 V / 0.01 A
IC revisionRev. 0

Description

Demonstration circuit 2840A features the LT®8365 in aBoost inverting configuration. It operates with a switchingfrequency of 400kHz and is designed to convert a 9V to 30Vsource to −250V, with 10mA output current.The demo board contains an optional third charge pumpstage for applications requiring higher output voltages.If needed, remove R14 and install optional components.Output voltage sensing connections remain the same.The LT8365 can be used for different topologies withinput voltages up to 60V. However, component selectionin this demo circuit restrict the input voltage to 30V.The demo board contains a selectable jumper, JP1, to aidin the selection of the desired Sync pin mode of operation.The default setting is Burst Mode® operation.This layout is optimized for good EMI performance andsmall solution size. Input and output filters are necessaryfor CISPR 25 Class 5 emissions. Radiated emissions plotsare included in this manual.

Features

  • Wide Input Voltage Range: 2.8V to 60V
  • Ultralow Quiescent Current and Low Ripple Burst Mode® Operation: IQ = 9µA
  • 1.5A, 150V Power Switch
  • Positive or Negative Output Voltage Programming with a Single Feedback Pin
  • Programmable Frequency (100kHz to 500kHz)
  • Synchronizable to an External Clock
  • Spread Spectrum Frequency Modulation for Low EMI
  • BIAS Pin for Higher Efficiency
  • Programmable Undervoltage Lockout (UVLO)
  • Thermally Enhanced 16-lead MSOP Package
  • AEC-Q100 Qualification in Progress

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
fres(MHz)
Pins
Type
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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74437324100
SPECWE-LHMI SMT Power Inductor, 10 µH, 1.95 A
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-LHMI SMT Power Inductor
Inductance10 µH
Performance Rated Current1.95 A
Saturation Current @ 10%1.5 A
Saturation Current @ 30%3.15 A
DC Resistance243 mΩ
Self Resonant Frequency23 MHz
Pins2 
–
MountSMT 
Length4.45 mm
Height1.8 mm
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Operating Temperature -40 °C up to +125 °C
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62001021121
SPECWR-PHD Pin Header, –, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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Pins10 
TypeStraight 
MountTHT 
Length10 mm
–
Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
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60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Pins2 
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–
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Rated Current3 A
Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
–Check availability