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参数资料
| 型号： | A3979SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 4/15页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER MICROSTEPPING 28-TSSOP |
| 标准包装： | 1 |
| 应用： | 步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | ±2.5A |
| 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-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1140 (CN2011-ZH PDF) |
| 其它名称： | 620-1148-6 |
A3979
DMOS Microstepping Driver with Translator
ELECTRICAL CHARACTERISTICS at T A = 25°C, V BB = 35 V, V DD = 3.0 to 5.5 V (unless otherwise noted)
Characteristics
Symbol
Test Conditions
Min.
Typ. 1
Max.
Units
Output Drivers
Load Supply Voltage Range
Output Leakage Current 2
Output On Resistance
Body Diode Forward Voltage
Motor Supply Current
V BB
I DSS
R DS(On)
V F
I BB
Operating
During Sleep mode
V OUT = V BB
V OUT = 0 V
Source driver, I OUT = –2.5 A
Sink driver, I OUT = 2.5 A
Source diode, I F = –2.5 A
Sink diode, I F = 2.5 A
f PWM < 50 kHz
Operating, outputs disabled
Sleep mode
8
0
–
–
–
–
–
–
–
–
–
–
–
<1.0
<1.0
0.28
0.22
–
–
–
–
–
35
35
20
–20
0.335
0.265
1.4
1.4
8.0
6.0
20
V
V
μ A
μ A
Ω
Ω
V
V
mA
mA
μ A
Control Logic
Logic Supply Voltage Range
Logic Supply Current
Logic Input Voltage
Logic Input Current 2
Reference Input Voltage Range
V DD
I DD
V IN(1)
V IN(0)
I IN(1)
I IN(0)
V REF
Operating
f PWM < 50 kHz
Outputs off
Sleep mode
V IN = 0.7 × V DD
V IN = 0.3 × V DD
Operating
3.0
–
–
–
0.7 × V DD
–
–20
–20
0
5.0
–
–
–
–
–
<1.0
<1.0
–
5.5
12
10
20
–
0.3 × V DD
20
20
V DD
V
mA
mA
μ A
V
V
μ A
μ A
V
Reference Input Current
HOME Output Voltage
Mixed Decay Mode Trip Point
I REF
V HOME(1) I HOME(1) = –200 μ A
V HOME(0) I HOME(0) = 200 μ A
V PFDH
V PFDL
V REF = 2 V, Phase Current = 38.27%
–
0.7 × V DD
–
–
–
–
0
–
–
0.6 × V DD
0.21 × V DD
–
±3
–
0.3 × V DD
–
–
±10
μ A
V
V
V
V
%
Gain (G m ) Error 3
STEP Pulse Width
Blank Time
Fixed Off-Time
Crossover Dead Time
E G
t W
t BLANK
t OFF
t DT
V REF = 2 V, Phase Current = 70.71%
V REF = 2 V, Phase Current = 100.00%
R T = 56 k Ω , C T = 680 pF
R T = 56 k Ω , C T = 680 pF
Synchronous rectification enabled
–
–
1
700
30
100
–
–
–
950
38
475
±5.0
±5.0
–
1200
46
800
%
%
μ s
ns
μ s
ns
Continued on the next page...
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
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