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A4964 Datasheet(PDF) 16 Page - Allegro MicroSystems |
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A4964 Datasheet(HTML) 16 Page - Allegro MicroSystems |
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16 / 92 page  Sensorless Sinusoidal Drive BLDC Controller A4964 16 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com GHx GLx tDEAD tVDQ tDEAD tVDQ disabled Low-side VDS monitor active Low-side VDS monitor disabled High-side VDS monitor active High-side VDS monitor disabled HS monitor disabled Figure 4: VDS Fault Monitor Activation – Blank Mode Timing (VDQ = 1) tVDQ tVDQ Gate Active VDS Fault Bit MOSFET turn on No fault present MOSFET turn on Fault present MOSFET on Transient disturbance No fault present MOSFET on Fault occurs Figure 5a: VDS Fault Detection - Blank Mode Timing (VDQ = 1) Figure 5b: VDS Fault Detection - Debounce Mode Timing (VDQ = 0) Gate Active VDS Fault Bit MOSFET turn on No fault present MOSFET turn on Fault present MOSFET on Transient disturbance No fault present MOSFET on Fault occurs tVDQ tVDQ tVDQ tVDQ |
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