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| 型号： | A4979GLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/44页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR DRVR MICRO STEP 28TSSOP |
| 特色产品： | A4979 Series |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 电机驱动器，步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | 1.5A |
| 电压 - 负载： | 7 V ~ 50 V |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 105°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 |
| 其它名称： | 620-1463-6 |
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A4979
Selection Guide
Part Number
Microstepping Programmable Stepper Motor Driver
With Stall Detect and Short Circuit Protection
Packing*
A4979GLPTR-T
4000 pieces per reel
4.4 mm × 9.7 mm, 1.2 mm nominal height TSSOP
with exposed thermal pad
*Contact Allegro ? for additional packing information.
Absolute Maximum Ratings Wi th respect to GND
Characteristic
Load Supply Voltage
Logic Supply Voltage
Pin CP1
Pins CP2, VCP
Pins STEP, DIR, ENABLE, DIAG
Pin VREG
Pin RESETn
Pin OSC
Pins MS0, MS1
Pins SDI, SDO, SCK, STRn
Pin REF
Pins OAP, OAM, OBP, OBM
Pins SENSA, SENSB
Ambient Operating Temperature
Range
Maximum Continuous Junction
Temperature
Symbol
V BBx
V DD
T A
T J (max)
Notes
Applies to V BBA and V BBB
Can be pulled to V BB with 38 k Ω
Range G; limited by power dissipation
Rating
–0.3 to 50
–0.3 to 6
–0.3 to V BB
–0.3 to V BB +8
–0.3 to 6
–0.3 to 8.5
–0.3 to 6
–0.3 to 6
–0.3 to 6
–0.3 to 6
–0.3 to 6
–0.3 to V BB
–0.3 to 1
–40 to 105
150
Unit
V
V
V
V
V
V
V
V
V
V
V
V
V
°C
°C
Overtemperature event not exceeding 10 s,
Transient Junction Temperature
Storage Temperature Range
T tJ
T stg
lifetime duration not exceeding 10 hours,
guaranteed by design and characterization
175
–55 to 150
°C
°C
Thermal Characteristics may require derating at maximum conditions
Characteristic
Package Thermal Resistance
(Junction to Ambient)
Package Thermal Resistance
(Junction to Pad)
Symbol
R θ JA
R θ JP
Test Conditions*
4-layer PCB based on JEDEC standard
2-layer PCB with 3.8 in. 2 of copper area each side
Value
28
32
2
Unit
oC/W
oC/W
oC/W
*Additional thermal information available on the Allegro website.
Table of Contents
Functional Block Diagram
Pin-out Diagram
Functional Description
Pin Functions
Driving a Stepper Motor
Diagnostics
Serial Interface Description
Phase Table Load Register
Diagnostic Registers
3
4
9
9
10
12
16
17
18
Application Information
Motor Movement Control
Using the Phase Table Load Capability
Power Dissipation
Layout
Package Drawing
Appendix A. Driving a Stepper Motor
Allegro MicroSystems, LLC
115 Northeast Cutoff
22
22
27
31
33
34
A-1
2
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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| A4980 | 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:The A4980 is a flexible microstepping motor driver with built-in translator for easy operation. |
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