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A3924 Datasheet(PDF) 14 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) 14 Page - Allegro MicroSystems

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Automotive, Full-Bridge MOSFET Driver
A3924
14
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Table 1: Control Logic Table: Control by Logic Inputs
Phase A
Phase B
HA
LAn
GHA
GLA
SA
HBn
LB
GHB
GLB
SB
0
1
LO
LO
Z
1
0
LO
LO
Z
0
0
LO
HI
LO
1
1
LO
HI
LO
1
1
HI
LO
HI
0
0
HI
LO
HI
1
0
LO
LO
Z
0
1
LO
LO
Z
HI ≡ high-side FET active, LO ≡ low-side FET active.
Z ≡ high impedance, both FETs off.
All control register bits set to 0, RESETn = 1, ENABLE = 1.
Table 2: Control Logic Table: Control by Serial Register
Phase A
Phase B
AH
AL
GHA
GLA
SA
BH
BL
GHB
GLB
SB
0
0
LO
LO
Z
0
0
LO
LO
Z
0
1
LO
HI
LO
0
1
LO
HI
LO
1
0
HI
LO
HI
1
0
HI
LO
HI
1
1
LO
LO
Z
1
1
LO
LO
Z
HI ≡ high-side FET active, LO ≡ low-side FET active.
Z ≡ high impedance, both FETs off.
Logic 0 input on HA,LB. Logic 1 input on LAn, HBn, RESETn = 1, ENABLE = 1.
Table 3: Control Combination Logic Table: Control by Logic Inputs & Serial Register
Phase A
Phase B
HA
AH
LAn
AL
GHA
GLA
SA
HBn
BH
LB
BL
GHB
GLB
SB
0
0
1
0
LO
LO
Z
1
0
0
0
LO
LO
Z
0
0
X
1
LO
HI
LO
1
0
X
1
LO
HI
LO
0
0
0
X
1
0
1
X
X
1
1
0
HI
LO
HI
X
1
0
0
HI
LO
HI
1
X
1
0
0
X
0
0
X
1
X
1
LO
LO
Z
X
1
X
1
LO
LO
Z
X
1
0
X
X
1
1
X
1
X
X
1
0
X
X
1
1
X
0
X
0
X
1
X
X ≡ don’t care, HI ≡ high-side FET active, LO ≡ low-side FET active, Z ≡ high impedance, both FETs off.
RESETn = 1; ENBLE = 1.
LOGIC TRUTH TABLES



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