A3944KLPTR-T Allegro Microsystems Inc, A3944KLPTR-T Datasheet - Page 15

• Manufacturer Part Number: A3944KLPTR-T
• Description: IC PREDRIVER MOSFET 6CH TSSOP
• Manufacturer: Allegro Microsystems Inc

Specifications of A3944KLPTR-T

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A3944
Figures 5 through 10 are channel fault timing diagrams, which
show fault conditions applied to a channel and the results of the
fault latches and the state of the fault register after serial reads
and channel state changes. Each diagram shows the state of
the channel control signal, INx, and the state of the gate drive
output, GATx, for the channel, as well as an approximation of
Figure 5. Fault Sequence: Short to battery during off-state (RT1=1)
Figure 6. Fault Sequence: Short to ground during on-state
DRNx
GATx
Fault register bit
CxSB
Fault
CSN
DRNx
Serial Read
Serial Read Data
GATx
IN
CxSG
Fault register bit
Fault
CSN
Serial Read
Serial Read Data
IN
X
X
N
o
N
n
o
t
e
BL(on)
n
e
0
0
Cxff=0
Cxff=0
t
Applied
BL(off)
Short
Cxff=0
t
BL(on)
Applied
Short
Automotive, Low Side FET Pre-Driver
Output
Disabled
S
1
h
o
CxSB=1
t r
o t
B
the relative voltage, DRNx, at the drain of the external MOSFET.
Beneath this is the latched fault state and the contents of the fault
register bits for the channel. The sequence of serial reads are
shown at the bottom of each figure as the state of the CSN input
and the resulting data bits read for the channel.
a
t
BL(off)
t t
r e
Removed
y
Short
t
S
1
RE
h
o
t r
CxSG=1
o t
G
o r
Removed
CxSB=1
u
Short
n
d
115 Northeast Cutoff
1.508.853.5000; www.allegromicro.com
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 U.S.A.
t
BL(off)
CxSB=1
t
BL(on)
CxSG=1
None
None
CxSB=1
0
CxSG=1
0
Cxff=0
V
V
STB
Cxff=0
STG
15