A4910 Datasheet, PDF (27/36 Pages) Allegro MicroSystems – Automotive 3-Phase MOSFET Driver

A4910
Automotive 3-Phase MOSFET Driver
Serial Register Definition
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
CONFIG0
WR BT5 BT4 BT3 BT2 BT1 BT0 DT6 DT5 DT4 DT3 DT2 DT1 DT0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
CONFIG1
WR CSB ESF DIAG1 DIAG0 DBM
–
VT6 VT5 VT4 VT3 VT2
0
1
0
1
1
0
0
0
0
0
1
0
0
0
Configuration Register 0 (Config0)
BT[5..0] Fault blanking time
Assumes 20 MHz clock
t_BL = n × 100 ns
where n is a positive integer defined by
BT[5..0]; for example, for the power-on-
reset condition, BT[5..0] = [1 0 0 0 0 0],
then t_BL = 3.2 μs. t_BL can be between 0 ns
and 6.3 μs. The accuracy of t_BL is defined
by the system clock period as defined in
the Electrical Characteristics table.
Configuration Register 1 (Config1)
CSB Current sense bandwith
CSB Current sense bandwith
0 Reduced bandwidth
1 Full bandwidth
ESF
ESF
0
1
Enable stop on fault
Enable stop on fault
Stop on fault disabled
Stop on fault enabled
VT1 VT0
0
0
Default
D
Default
D
DT[6..0]
Dead time
Assumes 20 MHz clock
t_DEAD = n × 50 ns
where where n is a positive integer
defined by DT[6..0] and t_DEAD has a
minimum value of 100 ns. For example,
for the power-on reset condition,
DT[6..0] = [0 1 0 0 0 0 0], t_DEAD = 1.6 μs.
t_DEAD can be between 100 ns and 6.35μs.
The accuracy of t_DEAD is defined by the
system clock period as defined in the
Electrical Characteristics table. A value of
1 or 2 in DT[6..0] sets the minimum dead
time of 100 ns. A value of all 0s disables
dead time.
DIAG[0..1] Selects signal routed to DIAG output
DIAG1 DIAG0 Signal on DIAG terminal
0
0 General Fault– low true
Clock / 409,600
0
1
(48.828 Hz Nominal)
1
0 V_DS Threshold voltage
1
1 Temperature
Default
D
DBM
DBM
0
1
Disable bootstrap management
Disable Bootstrap Management
Bootstrap management active
Bootstrap management disabled
Default
D
VT[6..0]
V_DS Threshold
Typically: V_DSTH = n × 25 mV
where n is a positive integer defined by
VT[6..0]. For example, for the power-on
reset condition, VT[6..0] = [0 1 0 0 0 0 0],
V_DSTH = 800 mV. V_DSTH can be between
0 and 3.175 V.
Allegro MicroSystems, LLC
27
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com