A4926 Datasheet, PDF (26/36 Pages) Allegro MicroSystems – Automotive Half-Bridge MOSFET Driver

A4926
Automotive Half-Bridge MOSFET Driver
SERIAL REGISTER REFERENCE
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
DT5
DT4
DT3
DT2
DT1
DT0
0: Config 0
0
0
0
0
WR
P
0
0
0
0
1
0
0
0
0
0
VT5
VT4
VT3
VT2
VT1
VT0
1: Config 1
0
0
0
1
WR
P
0
0
0
0
0
1
1
0
0
0
VDQ
2: Config 2
0
0
1
0
WR
P
0
0
0
0
0
0
0
0
0
0
TVD5 TVD4 TVD3 TVD2 TVD1 TVD0
3: Config 3
0
0
1
1
WR
P
0
0
0
0
0
1
0
0
0
0
VRG
4: Config 4
0
1
0
0
WR
P
0
0
0
1
0
0
0
0
0
0
Config 0
DT[5:0] Dead time.
t_DEAD = n × 50 ns
where n is a positive integer defined by
DT[5:0],
e.g. for the power-on-reset condition
DT[5:0] = [10 0000] then t_DEAD = 1.6 µs.
The range of t_DEAD is 100 ns to 3.15 µs.
Selecting a value of 1 or 2 will set the
dead time to 100 ns. A value of zero
disables the dead time.
Config 1
VT[5:0] VDS overvoltage threshold.
V_DST = n × 50 mV
where n is a positive integer defined by VT[5:0],
e.g. for the power-on-reset condition
VT[5:0] = [01 1000] then V_DST = 1.2 V.
The range of V_DST is 0 to 3.15 V.
Config 2
VDQ
VDQ
0
1
VDS Fault qualifier mode.
VDS Fault Qualifier
Debounce
Blank
Default
D
Config 3
TVD[5:0] VDS verification time.
t_VDQ = n × 100 ns
where n is a positive integer defined by TVD[5:0],
e.g. for the power-on-reset condition.
TVD[5:0] = [01 0000] then t_VDQ = 1.6 µs.
The range of t_VDQ is 0 to 6.3 µs.
Config 4
VRG
VRG
0
1
V_REG Voltage Level.
VREG Voltage
8V
11 V
Default
D
Allegro MicroSystems, LLC
26
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com