A3986
Dual Full-Bridge MOSFET Driver
with Microstepping Translator
ELECTRICAL CHARACTERISTICS at T
A
= 25°C, V
DD
= 5 V, V
BB
= 12 to 50V, unless noted otherwise
Characteristics
Supply and Reference
Load Supply Voltage Range
Load Supply Current
Load Supply Idle Current
Logic Supply Voltage Range
Logic Supply Current
Logic Supply Idle Current
Regulator Output
Bootstrap Diode Forward Voltage
Gate Output Drive
Turn-On Rise Time
Turn-Off Fall Time
Turn-On Propagation Delay
Turn-Off Propagation Delay
Crossover Dead Time
Pull-Up On Resistance
Pull-Down On Resistance
Short-Circuit Current – Source
1
Short-Circuit Current – Sink
GHx Output Voltage
GLx Output Voltage
Logic Inputs
Input Low Voltage
Input High Voltage
Input Hysteresis
Input Current
1
RESET Pulse Width
2
Symbol
V
BB
I
BB
I
BBQ
V
DD
I
DD
I
DDQ
V
REG
V
fBOOT
t
r
t
f
t
p(on)
t
p(off)
t
DEAD
R
OSC
= 10 kΩ, C
LOAD
= 1000 pF
ENABLE = High, outputs disabled
RESET = 0
Test Conditions
Min.
12
–
–
–
3.0
–
–
11.25
0.6
80
40
–
–
0.6
30
14
–140
160
V
C
– 0.2
V
REG
–
0.2
–
0.7 V
DD
150
–1
0.2
Typ.
–
–
–
–
–
–
–
–
0.8
120
60
180
180
–
40
19
–110
200
–
–
–
–
300
–
–
Max.
50
10
6
100
5.5
10
300
13
1
160
80
–
–
1.2
55
24
–80
250
–
–
0.3 V
DD
–
–
1
1
Units
V
mA
mA
μA
V
mA
μA
V
V
ns
ns
ns
ns
μs
Ω
Ω
mA
mA
V
V
V
V
mV
μA
μs
RESET = 0
I
REGInt
= 30 mA
I
fBOOT
= 10 mA
C
LOAD
= 1000 pF, 20% to 80%
C
LOAD
= 1000 pF, 80% to 20%
ENABLE low to gate drive on
ENABLE high to gate drive off
R
OSC
= 10 kΩ,
I
GH
= –25 mA
I
GL
= 25 mA
R
DS(on)UP
R
DS(on)DN
I
SC(source)
I
SC(sink)
V
GHx
CBOOTx fully charged
V
GLx
V
IL
V
IH
V
IHys
I
IN
t
wR
Continued on the next page...
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
ALLEGRO [ ALLEGRO MICROSYSTEMS ]
