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reference designNCV78723 | Demoboard Image sensor demo

Onsemi NCV78723 | Demoboard Image sensor demo

High Efficiency Buck Dual LED Driver with Integrated Current Sensing for Automotive Front Lighting

Overview

TopologyBuck Converter
Input voltage8-68 V
Switching frequency8-12 kHz
Output 160 V / 1.79 A
IC revision2

Description

The NCV78723 is a single-chip and high efficient Buck Dual LEDDriver designed for automotive front lighting applications like highbeam, low beam, DRL (daytime running light), turn indicator, foglight, static cornering, etc. The NCV78723 is in particular designed forhigh current LEDs and provides a complete solution to drive 2 LEDstrings of up-to 60 V. It includes 2 independent current regulators forthe LED strings and required diagnostic features for automotive frontlighting with a minimum of external components – the chip doesn’tneed any external sense resistor for the buck current regulation.The available output current and voltages can be customized perindividual LED string. When more than 2 LED channels are requiredon 1 module, then 2, 3 or more devices NCV78723 can be combined;also with NCV78713 device – the derivative of the NCV78723incorporating Buck Single LED Driver. Thanks to the SPIprogrammability, one single hardware configuration can supportvarious application platforms.

Features

Single Chip

  • Buck Topology
  • 2 LED Strings up-to 60 V
  • High Current Capability up to 1.6 A DC per Output
  • High Overall Efficiency
  • Minimum of External Components
  • Integrated High Accuracy Current Sensing
  • Integrated Switched Mode Buck Current Regulator
  • Average Current Regulation through the LEDs
  • High Operating Frequencies to Reduce Inductor Sizes
  • Low EMC Emission for LED Switching and Dimming
  • SPI Interface for Dynamic Control of System Parameters
  • Fail Safe Operating (FSO) Mode, Stand-Alone Mode

Typical applications

  • DRL
  • Low Beam
  • High Beam
  • Turn Indicator
  • Static Cornering
  • Position or Park Light
  • Fog

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Pins
Application
PCB/Cable/Panel
Modularity
Type
IR(A)
ISAT(A)
fres(MHz)
ISAT,10%(A)
ISAT,30%(A)
IR,40K(A)
IRP,40K(A)
RDC max.(mΩ)
C
VR(V (DC))
Endurance(h)
IRIPPLE(mA)
ILeak(µA)
DF(%)
Pitch(mm)
Ø D(mm)
L(mm)
Packaging
xPxC
Variant
Ports
Shielding
Tab
EMI
Application System
Working Voltage(V (AC))
Gender
Version
VIN
VOut1(V)
IOut1(A)
VOut2(V)
IOut2(A)
VOut3(V)
IOut3(A)
L(µH)
n
VT(V (AC))
Size
Mount
SamplesAvailability & Sample
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744043220
SPECWE-TPC SMT Tiny Power Inductor, 2, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
Pins2 
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Rated Current0.925 A
Saturation Current0.7 A
Self Resonant Frequency20 MHz
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DC Resistance185 mΩ
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Length4.8 mm
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ShieldingShielded 
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Inductance22 µH
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Size4828 
MountSMT 
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7447709101
SPECWE-PD SMT Power Inductor, 2, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
Pins2 
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Rated Current2.5 A
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Self Resonant Frequency4.3 MHz
Saturation Current @ 10%3.1 A
Saturation Current @ 30%3.8 A
Rated Current2.5 A
Performance Rated Current3.2 A
DC Resistance110 mΩ
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Length12 mm
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ShieldingShielded 
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VersionStandard 
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Inductance100 µH
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Size1210 
MountSMT 
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691322110003
SPECWR-TBL Series 3221 - 3.50 mm Horizontal PCB Header, 3, PCB Header
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 3221 - 3.50 mm Horizontal PCB Header
Pins3 
ApplicationPCB Header 
PCB/Cable/PanelCable 
ModularityNo 
TypePCB Header 
Rated Current10.5 A
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Pitch3.5 mm
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Length11.9 mm
PackagingBox 
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Working Voltage300 V (AC)
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MountTHT 
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691322310003
SPECWR-TBL Series 322 - 3.81 mm Horizontal PCB Header, 3, PCB Header
Simu­lation–
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 322 - 3.81 mm Horizontal PCB Header
Pins3 
ApplicationPCB Header 
PCB/Cable/PanelCable 
ModularityNo 
TypePCB Header 
Rated Current10.5 A
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Pitch3.81 mm
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Length12.62 mm
PackagingBox 
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Working Voltage300 V (AC)
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MountTHT 
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691322110004
SPECWR-TBL Series 3221 - 3.50 mm Horizontal PCB Header, 4, PCB Header
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 3221 - 3.50 mm Horizontal PCB Header
Pins4 
ApplicationPCB Header 
PCB/Cable/PanelCable 
ModularityNo 
TypePCB Header 
Rated Current10.5 A
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Pitch3.5 mm
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Length15.4 mm
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Working Voltage300 V (AC)
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691322310004
SPECWR-TBL Series 322 - 3.81 mm Horizontal PCB Header, 4, PCB Header
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-TBL Series 322 - 3.81 mm Horizontal PCB Header
Pins4 
ApplicationPCB Header 
PCB/Cable/PanelCable 
ModularityNo 
TypePCB Header 
Rated Current10.5 A
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Pitch3.81 mm
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Length16.43 mm
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Working Voltage300 V (AC)
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MountTHT 
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618009231321
SPECWR-DSUB PCB, 9, –
Simu­lation–
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-DSUB PCB
Pins9 
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TypeAngled 
Rated Current3 A
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Pitch2.77 mm
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Length30.81 mm
PackagingTray 
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Variantwith Hex Screw 
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Working Voltage125 V (AC)
GenderFemale 
VersionStandard 
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749119250
SPECWE-PoE Power over Ethernet Transformer, –, –
Simu­lation–
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PoE Power over Ethernet Transformer
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Saturation Current0.7 A
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Length16.3 mm
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VersionFlyback 
Input Voltage 36 - 57 V (DC)
Output Voltage 15 V
Output Current 10.47 A
Output Voltage 25 V
Output Current 20.47 A
Output Voltage 35 V
Output Current 30.47 A
Inductance210 µH
Turns Ratio6:1:1:1:1.75 
Insulation Test Voltage1500 V (AC)
SizeER14.5/6 
MountSMT 
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860040875003
SPECWCAP-ATUL Aluminum Electrolytic Capacitors, –, –
Simu­lation
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Downloads8 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-ATUL Aluminum Electrolytic Capacitors
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Capacitance68 µF
Rated Voltage100 V (DC)
Endurance 7000
Ripple Current460 mA
Leakage Current68 µA
Dissipation Factor9 %
Pitch5 mm
Diameter10 mm
Length16 mm
PackagingAmmopack 
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615008148521
SPECWR-MJ Cat 3 Modular Jacks – THT, –, –
Simu­lation–
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-MJ Cat 3 Modular Jacks – THT
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TypeHorizontal 
Rated Current1.5 A
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PackagingTray 
Number of Pins (xPxC)8P8C 
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Ports1x1 
ShieldingPlastic 
Tab PositionUp 
EMI FingersNo 
Application SystemCAT 3 
Working Voltage120 V (AC)
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MountTHT 
–Check availability