Continuing the analysis related to bus shutdown and relevant disconnections, this time we focus on Allegro’s PMIC A81407, which can be combined with A4911/18 for a versatile solution.This combination is also quite effective in applications such as wire control and redundant EPS.
Key features of the chip include:
- ASIL D functional safety level
- Wide input voltage range, operating from 3.8 to 36 VIN
- 2.2 MHz buck or buck-boost pre-regulator (VREG: 5.35 V), low EMI frequency jitter
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Frequency jitter and controllable transition rates help improve electromagnetic compatibility
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Four internal linear regulators with foldback short-circuit protection
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Multiple watchdog mechanisms
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Floating gate drivers (with charge pumps) for external switched load control
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Analog multiplexer (AMUX) reports operational values of multiple important parameters
The design includes a bus shutdown with three related disconnections.
