A4980 데이터 시트보기 (PDF) - Allegro MicroSystems
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A4980 Datasheet PDF : 44 Pages
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A4980
Automotive, Programmable Stepper Driver
ELECTRICAL CHARACTERISTICS1,2 (continued) Valid at TJ = –40°C to 150°C, VBB = 6 to 28 V, VDD = 3.3 V; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Unit
Diagnostics and Protection
VBB Overvoltage Threshold
VBBOV VBB rising
32
34
36
V
VBB Overvoltage Hysteresis
VBBOVHys
2
–
4
V
VBB Undervoltage Threshold
VBBUV VBB falling
5.2
5.5
5.8
V
VBB Undervoltage Hysteresis
VBBHys
500
760
–
mV
VREG Undervoltage Threshold – High VREGUVH VREG falling
4.6
4.8
4.95
V
VREG Undervoltage Hysteresis – High VRGUVHHys
250
370
–
mV
VREG Undervoltage Threshold – Low VREGUVL VREG falling
2.85
3
3.15
V
VREG Undervoltage Hysteresis – Low VRGUVLHys
100
230
–
mV
VDD Undervoltage Threshold
VDDUV VDD falling
2.6
–
2.9
V
VDD Undervoltage Hysteresis
VDDUVHys
50
100
–
mV
OSC Timeout
tWD
Bit 13 = 1
0.5
1
1.5
μs
High-Side Overcurrent Threshold
IOCH
Sampled after tSCT
1.4
2.05
2.65
A
High-Side Current Limit
ILIMH Active during tSCT
3
5.5
8
A
Low-Side Overcurrent Sense Voltage
VOCL Sampled after tSCT
210
250
290
mV
Overcurrent Fault Delay
tSCT Default Fault Delay
1500
2000
2700
ns
Open Load Current Threshold Error
EIOC VREF = 2 V, Mx0 = Mx1 = 1
–
–
±10
%
Temperature Voltage Output Offset
VTO Temperature output selected on DIAG pin
–
1440
–
mV
Temperature Voltage Output Slope
AT
–
–3.92
–
mV/°C
Cold Temperature Warning Threshold
TJWC Temperature decreasing
–20
–10
0
ºC
Cold Temperature Warning Hysteresis TJWChys
–
15
–
ºC
Hot Temperature Warning Threshold
TJWH Temperature increasing
125
135
145
ºC
Hot Temperature Warning Hysteresis TJWHhys
–
15
–
ºC
Overtemperature Shutdown Threshold
TJF
Temperature increasing
155
170
–
ºC
Overtemperature Hysteresis
TJhys Recovery = TJF – TJhys
–
15
–
ºC
1For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2All references to “VBB” apply to VBBA and VBBB.
3Function is correct but parameters are not guaranteed above or below the general limits (6 to 28 V). Outputs not operational above VBBOV or
below VREGUVL.
4Assumes 4 MHz clock.
5Current Trip Point Error is the difference between actual current trip point and the target current trip point, referred to maximum full scale (100%)
current: Eitrip = 100 × [Itrip(actual) – Itrip(target)] / Ifullscale (%).
Allegro MicroSystems, Inc.
6
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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