A4980 Datasheet, PDF (6/44 Pages) Allegro MicroSystems – The A4980 is a flexible microstepping motor driver with built-in translator for easy operation.

A4980
Automotive, Programmable Stepper Driver
ELECTRICAL CHARACTERISTICS^1,2 (continued) Valid at T_J = –40°C to 150°C, V_BB = 6 to 28 V, V_DD = 3.3 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Diagnostics and Protection
VBB Overvoltage Threshold
V_BBOV V_BB rising
32
34
36
V
VBB Overvoltage Hysteresis
V_BBOVHys
2
–
4
V
VBB Undervoltage Threshold
V_BBUV V_BB falling
5.2
5.5
5.8
V
VBB Undervoltage Hysteresis
V_BBHys
500
760
–
mV
VREG Undervoltage Threshold – High V_REGUVH V_REG falling
4.6
4.8
4.95
V
VREG Undervoltage Hysteresis – High V_RGUVHHys
250
370
–
mV
VREG Undervoltage Threshold – Low V_REGUVL V_REG falling
2.85
3
3.15
V
VREG Undervoltage Hysteresis – Low V_RGUVLHys
100
230
–
mV
VDD Undervoltage Threshold
V_DDUV V_DD falling
2.6
–
2.9
V
VDD Undervoltage Hysteresis
V_DDUVHys
50
100
–
mV
OSC Timeout
t_WD
Bit 13 = 1
0.5
1
1.5
μs
High-Side Overcurrent Threshold
I_OCH
Sampled after t_SCT
1.4
2.05
2.65
A
High-Side Current Limit
I_LIMH Active during t_SCT
3
5.5
8
A
Low-Side Overcurrent Sense Voltage
V_OCL Sampled after t_SCT
210
250
290
mV
Overcurrent Fault Delay
t_SCT Default Fault Delay
1500
2000
2700
ns
Open Load Current Threshold Error
E_IOC V_REF = 2 V, Mx0 = Mx1 = 1
–
–
±10
%
Temperature Voltage Output Offset
V_TO Temperature output selected on DIAG pin
–
1440
–
mV
Temperature Voltage Output Slope
A_T
–
–3.92
–
mV/°C
Cold Temperature Warning Threshold
T_JWC Temperature decreasing
–20
–10
0
ºC
Cold Temperature Warning Hysteresis T_JWChys
–
15
–
ºC
Hot Temperature Warning Threshold
T_JWH Temperature increasing
125
135
145
ºC
Hot Temperature Warning Hysteresis T_JWHhys
–
15
–
ºC
Overtemperature Shutdown Threshold
T_JF
Temperature increasing
155
170
–
ºC
Overtemperature Hysteresis
T_Jhys Recovery = T_JF – T_Jhys
–
15
–
ºC
1_{For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.}
2_{All references to “VBB” apply to VBBA and VBBB.}
3_{Function is correct but parameters are not guaranteed above or below the general limits (6 to 28 V). Outputs not operational above VBBOV or}
below V_REGUVL.
4_{Assumes 4 MHz clock.}
5_{Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to maximum full scale (100%)}
current: E_itrip = 100 × [I_trip(actual) – I_trip(target)] / I_fullscale (%).
Allegro MicroSystems, Inc.
6
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com