Bipolar transistors

Diodes

ESD protection, TVS, filtering and signal conditioning

MOSFETs

SiC MOSFETs

GaN FETs

IGBTs

Analog & Logic ICs

Automotive qualified products (AEC-Q100/Q101)

Electronic Fuel Injection

One result of the continuing pressure for ever more fuel-efficient vehicles is a greater use of direct electronic fuel injection (EFI) systems. These injector/valve controller systems help ensure the most efficient air-fuel mix within both diesel and gasoline engines regardless of the running conditions of the vehicle. By connecting the fuel injectors to the engine control unit and various sensors, including exhaust gas temperature (EGT), ensure the appropriate and precise spraying of the atomized fuel.

  • Block diagram
  • Design considerations
  • Product listing
  • Support

Block diagram

TVSdiode ESDdiode Signalconditioning BATTERY Sensors incl.EGT, O2,etc. Hold - Vbat Vbat Vboost DC-DC boost (50-70 V) aaa-028523 Engine management sensors Pull-in - Vboost A2 A1 A2 A4 drive 1 injector 1 driverecirc drive 2 current monitoring LS1 LS2 shunt LS3 LS4 injector 2 drive 3 injector 3 drive 4 injector 4 CAN/FlexRay Reverse batteryprotection 12 V ECU Highlighted components are Nexperia focus products.

Transient Voltage Suppressors (TVS)

Recommended products (1)

Reverse battery protection

Recommended products (2)

Pull-in transistor

Recommended products (1)

Hold current transistor

Recommended products (1)

Freewheeling diode

Recommended products (1)

Cylinder select transistor

Recommended products (2)

Avalanche diodes

Recommended products (1)

DC-DC boost low side switch

Recommended products (1)

ESD bus protection

Recommended products (1)

DC-DC freewheeling diode

Recommended products (1)

Select a component

To view more information about the Nexperia components used in this application, please select a component above or click on a component (highlighted in blue) in the block diagram.

Design considerations

  • Controlling coil current is the key to injector fuel accuracy, with ‘pull-in’ requiring large currents while less current is needed to ‘hold’
  • N-channel MOSFETs for switch pull-in, hold current and cylinder select need high current transient robustness
  • Schottky rectifier or PN rectifier for freewheeling and protection of inductive load
  • Ensure adequate suppression and filtering of EMI noise
  • Using 100 V, ultra-low-leakage Schottky technology helps prevent thermal runaway

Product listing

Transient Voltage Suppressors (TVS)

Reverse battery protection

Pull-in transistor

Hold current transistor

Freewheeling diode

Cylinder select transistor

Avalanche diodes

DC-DC boost low side switch

ESD bus protection

DC-DC freewheeling diode

Support

Design handbooks

Boards

Documentation and videos