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A3924 Datasheet(PDF) 13 Page - Allegro MicroSystems

Part # A3924
Description  Automotive, Full-Bridge MOSFET Driver
PDF  55 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A3924 Datasheet(HTML) 13 Page - Allegro MicroSystems

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Automotive, Full-Bridge MOSFET Driver
A3924
13
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
GHA
GLA
GHB
GLB
OC Monitor
Blank
Blank
Blank
Blank
Blank
Active
Active
Active
Active
Active
t
OCQ
t
OCQ
t
OCQ
t
OCQ
t
OCQ
Figure 4: Overcurrent Fault Monitor – Blank Mode Timing (OCQ=1)
MOSFET turn on
No fault present
MOSFET turn on
Fault present
MOSFET on
Transient disturbance
No fault present
MOSFET on
Fault occurs
Gxx
VDS
Fault Bit
t
VDQ
t
VDQ
DIAG
Figure 5a: VDS Fault Monitor – Blank Mode Timing (VDQ=1)
MOSFET turn on
No fault present
MOSFET turn on
Fault present
MOSFET on
Transient disturbance
No fault present
MOSFET on
Fault occurs
Gxx
VDS
Fault Bit
DIAG
t
VDQ
t
VDQ
t
VDQ
t
VDQ
Figure 5b: VDS Fault Monitor – Debounce Mode Timing (VDQ=0)
VDS FAULT TIMING DIAGRAMS



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