- Block diagram
- Design considerations
- Product listing
- Support
Block diagram
Transient Voltage Suppressors (TVS)
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Reverse battery protection
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Pull-in transistor
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Hold current transistor
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Freewheeling diode
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Cylinder select transistor
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Avalanche diodes
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DC-DC boost low side switch
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ESD bus protection
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DC-DC freewheeling diode
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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