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A New Approach to Circuit Breaker Design Using Silicon Carbide Switches - Nov 21
Mechanical circuit breakers can be low cost with minimal losses, but they operate slowly and wear out. Solid state versions overcome the problems and are becoming increasing viable as replacements at...
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Power Electronics Europe News
 
AEC-compliant Hall-effect switches have self-diagnostic capability

The AH323xQ/4xQ two-wire unipolar and AH327xQ/8xQ latch switch ICs provide high sensitivity and high stability over wide operating voltage and temperature ranges, says the company. They are for use in automotive proximity- and position-sensing applications, for example seatbelt buckles, power windows, gear selector and seat positioning. Using two-wire Hall switches reduces the number of wires required in the harness, explains Diodes, which saves cost, reduces system complexity and improves robustness to electrical noise.

The AH324xQ and AH328xQ have integrated self-diagnostics which continually monitor the main device blocks, supply voltage, and temperature. A third output state warns of an abnormal condition. The switches are ISO 26262 ASIL-B ready and have been developed with safety analysis conducted in accordance with the ISO 26262 standard.

The company’s choice of advanced chopper stabilised design provides superior stability of the magnetic operating and release points (BOP/BRP) over an operating range of 2.7 to 27V and -40 to 150 degree C temperature range. This stability, coupled with a high ESD rating of 8kV, built-in reverse blocking diode, and supply pin Zener clamp, enables the AH32xxQ series to meet the demands of automotive proximity/position-sensing applications, says Diodes.

All AH32xxQ devices are supplied in the SC59 package. They are qualified to AEC-Q100, manufactured in IATF 16949 certified facilities, and support PPAP documentation.



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