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reference designLT8672HMS | Demoboard DBB Board

Analog Devices LT8672HMS | Demoboard DBB Board

Active Rectifier Controller with Reverse Protection

Overview

TopologyOther Topology
Switching frequency50-100 kHz
IC revision1.0

Description

The LT®8672 is an active rectifier controller for reverse input protection. It drives an external N-channel MOSFET to replace a power Schottky diode. Its very low quiescent current and fast transient response meet the tough requirements in automotive applications where AC input signals of up to 100kHz are present. These signals are rectified with minimum power dissipation on the external FET, simplifying thermal management on the PCB. With a drop of only 20mV, the LT8672 solution eases the minimum input voltage requirement during cold crank and start-stop, allowing simpler and more efficient circuits. If the input power source fails or is shorted, a fast turn-off minimizes reverse current transients. An available shutdown mode reduces the quiescent current to 3.5μA. An integrated auxiliary boost regulator provides the required boost voltage to turn the external FET fully on. A power good pin signals when the external FET is ready to take load current.

Features

  • AEC-Q100 Qualified for Automotive Applications
  • Reverse Input Protection to –40V
  • Improved Performance Compared to a Schottky Diode
  • Reduce Power Dissipation by >90%
  • Reduce Drop to 20mV n Ultrafast Transient Response
  • Rectifies 6VP-P Up to 50kHz n Rectifies 2VP-P Up to 100kHz - Wide Operating Voltage Range: 3V to 42V
  • Low 20µA Quiescent Current in Operation
  • Low 3.5µA Shutdown Current n Accurate 1.21V Enable Pin Threshold n Small 10-Lead MSOP Package, 10-Lead 3mm × 2mm DFN Package and 3mm × 2mm Side-Wettable DFN Package

Typical applications

  • Automotive Battery Protection
  • Portable Instrumentation
  • Industrial Supplies

More information

Products

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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.(°)
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Mount
ISAT(A)
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(Ω)
Type
IR(mA)
Z @ 1 GHz(Ω)
H(mm)
SamplesAvailability & Sample
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150060GS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 525 nm, Green
Simu­lation
Availability
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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
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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MountSMT 
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Height0.7 mm
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150060YS75000
SPECWL-SMCW SMT Mono-color Chip LED Waterclear, 590 nm, Yellow
Simu­lation
Availability
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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
Dominant Wavelength [typ.]590 nm
Emitting ColorYellow 
Peak Wavelength [typ.]595 nm
Luminous Intensity [typ.]120 mcd
Forward Voltage [typ.]2 V
Chip TechnologyAlInGaP 
Viewing Angle Phi 0° [typ.]140 °
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MountSMT 
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Height0.7 mm
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74279268
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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MountSMT 
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Impedance @ 100 MHz15 Ω
Maximum Impedance60 Ω
Maximum Impedance1000 MHz 
Rated Current 21900 mA
DC Resistance0.1 Ω
TypeHigh Speed 
Rated Current500 mA
Impedance @ 1 GHz56 Ω
Height0.8 mm
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742792040
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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MountSMT 
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Impedance @ 100 MHz600 Ω
Maximum Impedance700 Ω
Maximum Impedance150 MHz 
Rated Current 22000 mA
DC Resistance0.15 Ω
TypeHigh Current 
Rated Current1500 mA
Impedance @ 1 GHz193 Ω
Height0.0009 mm
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742792118
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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MountSMT 
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Impedance @ 100 MHz600 Ω
Maximum Impedance650 Ω
Maximum Impedance80 MHz 
Rated Current 22500 mA
DC Resistance0.07 Ω
TypeHigh Current 
Rated Current1500 mA
Impedance @ 1 GHz79 Ω
Height1.1 mm
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74279221100
SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, –
Simu­lation
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MPSB EMI Multilayer Power Suppression Bead
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DC Resistance1 mΩ
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MountSMT 
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Impedance @ 100 MHz10 Ω
Maximum Impedance41 Ω
Maximum Impedance2178 MHz 
Rated Current 210500 mA
DC Resistance0.003 Ω
TypeHigh Current 
Rated Current10500 mA
Impedance @ 1 GHz28 Ω
Height1.1 mm
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74279223560
SPECWE-MPSB EMI Multilayer Power Suppression Bead, –, –
Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MPSB EMI Multilayer Power Suppression Bead
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DC Resistance2.5 mΩ
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MountSMT 
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Impedance @ 100 MHz56 Ω
Maximum Impedance90 Ω
Maximum Impedance1000 MHz 
Rated Current 210000 mA
DC Resistance0.004 Ω
TypeHigh Current 
Rated Current10000 mA
Impedance @ 1 GHz90 Ω
Height2.28 mm
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744028002
SPECWE-TPC SMT Tiny Power Inductor, –, –
Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
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Inductance2.2 µH
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DC Resistance125 mΩ
Self Resonant Frequency100 MHz
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MountSMT 
Saturation Current1 A
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DC Resistance0.155 Ω
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Rated Current1300 mA
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Height1.1 mm
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744383360033
SPECWE-MAPI SMT Power Inductor, –, –
Simu­lation
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
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Inductance0.33 µH
Performance Rated Current8.7 A
Saturation Current @ 30%10.5 A
DC Resistance14 mΩ
Self Resonant Frequency140 MHz
Operating Voltage80 V
MountSMT 
Saturation Current8.3 A
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DC Resistance0.017 Ω
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Rated Current5500 mA
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Height2 mm
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742792117
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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Impedance @ 100 MHz48 Ω
Maximum Impedance90 Ω
Maximum Impedance600 MHz 
Rated Current 26000 mA
DC Resistance0.005 Ω
TypeHigh Current 
Rated Current4000 mA
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Height1.1 mm
–Check availability