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| 型号： | A3977SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 5/19页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR PWM DUAL 28TSSOP |
| 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： | 620-1147-6 |
A3977
Microstepping DMOS Driver with Translator
ELECTRICAL CHARACTERISTICS at T A = +25°C, V BB = 35 V, V DD = 3.0 V to 5.5V (unless otherwise noted)
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output Drivers
Load Supply Voltage Range
Output Leakage Current
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
0
–
–
–
–
–
–
–
–
–
–
–
<1.0
<1.0
0.45
0.36
–
–
–
–
–
35
35
20
-20
0.57
0.43
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 Input Voltage
Logic Input Current
Maximum STEP Frequency
HOME Output Voltage
Blank Time
Fixed Off Time
Mixed Decay Trip Point
Ref. Input Voltage Range
Reference Input Current
Gain (Gm) Error (note 3)
Crossover Dead Time
V DD
V IN(1)
V IN(0)
I IN(1)
I IN(0)
f STEP
V OH
V OL
t BLANK
t off
PFDH
PFDL
VREF
IREF
EG
tDT
Operating
V IN = 0.7V DD
V IN = 0.3V DD
I OH = -200 μ A
I OL = 200 μ A
R t = 56 k Ω , C t = 680 pF
R t = 56 k Ω , C t = 680 pF
Operating
VREF = 2 V, Phase Current = 38.27%
VREF = 2 V, Phase Current = 70.71%
VREF = 2 V, Phase Current = 100.00%
SR enabled
3.0
0.7V DD
–
-20
-20
500*
0.7V DD
–
700
30
–
–
0
–
–
–
–
100
5.0
–
–
<1.0
<1.0
–
–
–
950
38
0.6VDD
0.21VDD
–
0
–
–
–
475
5.5
–
0.3V DD
20
20
–
–
0.3V DD
1200
46
–
–
VDD
±3.0
±10
±5.0
±5.0
800
V
V
V
μ A
μ A
kHz
V
V
ns
μ s
V
V
V
μ A
%
%
%
ns
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
5
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