A4940 View Datasheet(PDF) - Allegro MicroSystems
Part Name
Description
MFG CO.
'A4940' PDF : 14 Pages View PDF
A4940
Automotive Full Bridge MOSFET Driver
ELECTRICAL CHARACTERISTICS (continued) Valid at TJ = –40°C to 150°C, VBB = 7 to 50 V, VDD = 3 to 5.5 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Logic Inputs and Outputs
FAULT Output (Open drain)
FAULT Output Leakage Current3
RDEAD Current3
Input Low Voltage
Input High Voltage
Input Hysteresis
Input Current (Except RESET)3
Input Pull-down Resistor (RESET)
RESET Pulse Time
Protection
VOL
IOH
IDEAD
VIL
VIH
VIHYS
IIN
RPD
tRES
IFAULTOL = 1 mA, fault present
VFAULTO = 5 V, fault not present
RDEAD = GND
0 V < VIN < VDD
–
–
0.4
V
–1
–
1
μA
–200
–
–70
μA
–
–
0.3 × VDD
V
0.7 × VDD
–
–
V
300
500
–
mV
–1
–
1
μA
–
50
–
kΩ
0.1
3.5
μs
VREG Undervoltage Lockout
VREGUVON VREG rising
VREGUVOFF VREG falling
7.5
8
6.6
7.1
Bootstrap Undervoltage
VBOOTUV VBOOT falling, VCX – VSX
59
–
Bootstrap Undervoltage Hysteresis
VBOOTUVHYS
–
20
VDD Undervoltage Turn-Off
VDDUV VDD falling
2.45
2.7
VDD Undervoltage Hysteresis
VDDUVHYS
50
100
Overtemperature Flag
TJF
Temperature increasing
150
170
Overtemperature Hysteresis
TJFHYS Recovery = TJF – TJFHYS
–
15
1Function is correct, but parameters are not guaranteed below the general limit (7 V).
2See Gate Drive Timing.
3For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
8.5
7.6
69
–
2.85
150
–
–
V
V
%VREG
%VREG
V
mV
ºC
ºC
Gate Drive Timing Diagrams
xHI
xLO
GHx
GLx
tp(off)
tDEAD
tDEAD
tp(off)
Complementary
xHI
xLO
GHx
tp(on)
tp(off)
GLx
High side only
xHI
xLO
GHx
GLx
tp(on)
tp(off)
Low side only
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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