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| 型号： | A4988SETTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 4/20页 |
| 文件大小： | 0K |
| 描述： | IC MICROSTEPPER MOTOR DRVR 28QFN |
| 特色产品： | A498x Motor Driver Family |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±2A |
| 电压 - 负载： | 8 V ~ 35 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-VFQFN 裸露焊盘 |
| 供应商设备封装： | 28-QFN/MLP 裸露焊盘（5x5） |
| 包装： | 标准包装 |
| 其它名称： | 620-1343-6 |
A4988
DMOS Microstepping Driver with Translator
And Overcurrent Protection
ELECTRICAL CHARACTERISTICS 1 at T A = 25°C, V BB = 35 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ. 2
Max.
Units
Output Drivers
Load Supply Voltage Range
Logic Supply Voltage Range
Output On Resistance
Body Diode Forward Voltage
Motor Supply Current
Logic Supply Current
V BB
V DD
R DSON
V F
I BB
I DD
Operating
Operating
Source Driver, I OUT = –1.5 A
Sink Driver, I OUT = 1.5 A
Source Diode, I F = –1.5 A
Sink Diode, I F = 1.5 A
f PWM < 50 kHz
Operating, outputs disabled
f PWM < 50 kHz
Outputs off
8
3.0
–
–
–
–
–
–
–
–
–
–
320
320
–
–
–
–
–
–
35
5.5
430
430
1.2
1.2
4
2
8
5
V
V
m Ω
m Ω
V
V
mA
mA
mA
mA
Control Logic
Logic Input Voltage
Logic Input Current
Microstep Select
Logic Input Hysteresis
Blank Time
Fixed Off-Time
Reference Input Voltage Range
Reference Input Current
Current Trip-Level Error 3
Crossover Dead Time
V IN(1)
V IN(0)
I IN(1)
I IN(0)
R MS1
R MS2
R MS3
V HYS(IN)
t BLANK
t OFF
V REF
I REF
err I
t DT
V IN = V DD ? 0.7
V IN = V DD ? 0.3
MS1 pin
MS2 pin
MS3 pin
As a % of V DD
OSC = VDD or GND
R OSC = 25 k Ω
V REF = 2 V, %I TripMAX = 38.27%
V REF = 2 V, %I TripMAX = 70.71%
V REF = 2 V, %I TripMAX = 100.00%
V DD ? 0.7
–
–20
–20
–
–
–
5
0.7
20
23
0
–3
–
–
–
100
–
–
<1.0
<1.0
100
50
100
11
1
30
30
–
0
–
–
–
475
–
V DD ? 0.3
20
20
–
–
–
19
1.3
40
37
4
3
±15
±5
±5
800
V
V
μ A
μ A
k Ω
k Ω
k Ω
%
μ s
μ s
μ s
V
μ A
%
%
%
ns
Protection
Overcurrent Protection Threshold 4
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
I OCPST
T TSD
T TSDHYS
2.1
–
–
–
165
15
–
–
–
A
°C
°C
VDD Undervoltage Lockout
VDD Undervoltage Hysteresis
V DDUVLO
V DDUVLOHYS
V DD rising
2.7
–
2.8
90
2.9
–
V
mV
1 For
input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2 Typical
data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual
units, within the specified maximum and minimum limits.
3 V
ERR = [(V REF /8) – V SENSE ] / (V REF /8).
4 Overcurrent protection (OCP) is tested at T A = 25°C in a restricted range and guaranteed by characterization.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
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