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参数资料
| 型号： | A3977SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 16/19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
Terminal List
Terminal
LP
ED
Name
GND
SENSE 1
HOME
DIR
OUT 1A
NC
PFD
RC 1
GND
AGND
REF
RC 2
LOGIC SUPPLY
NC
OUT 2A
MS 2
MS 1
SENSE 2
GND
LOAD SUPPLY 2
SR
RESET
OUT 2B
NC
STEP
V REG
PGND
GND
V CP
CP 1
CP 2
NC
OUT 1B
ENABLE
SLEEP
LOAD SUPPLY 1
Terminal Description
Analog and power ground
Sense resistor for bridge 1
Logic output
Logic Input
DMOS H bridge 1 output A
No (internal) connection
Mixed decay setting
Analog Input for ? xed offtime – bridge 1
Analog and power ground
Analog ground
Gm reference input
Analog input for ? xed offtime – bridge 2
V DD , the logic supply voltage
No (internal) connection
DMOS H bridge 2 output A
Logic input
Logic input
Sense resistor for bridge 2
Analog and power ground
V BB2 , the load supply for bridge 2
Logic input
Logic input
DMOS H bridge 2 output B
No (internal) connection
Logic input
Regulator decoupling
Power ground
Analog and power ground
Reservoir capacitor
Charge pump capacitor
Charge pump capacitor
No (internal) connection
DMOS H bridge 1 output B
Logic input
Logic input
V BB1 , the load supply for bridge 1
(TSSOP)
–
1
2
3
4
–
5
6
–
7*
8
9
10
–
11
12
13
14
–
15
16
17
18
–
19
20
21*
–
22
23
24
–
25
26
27
28
(PLCC)
44, 1, 2
3
4
5
6
7, 8
9
10
11, 12, 13
–
14
15
16
17
18
19
20
21
22, 23, 24
25
26
27
28
29, 30
31
32
–
33, 34, 35
36
37
38
39
40
41
42
43
* AGND and PGND on the TSSOP package must be connected together externally.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
16
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