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参数资料
| 型号： | A3984SLPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC DRIVER MICROSTEPPING 24-TSSOP |
| 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： | 24-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 24-TSSOP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 1141 (CN2011-ZH PDF) |
| 其它名称： | 620-1150-6 |
A3984
Description (continued)
DMOS Microstepping Driver with Translator
initially to a fast decay for a period amounting to 31.25% of
the fixed off-time, then to a slow decay for the remainder of the
off-time). This current decay control scheme results in reduced
audible motor noise, increased step accuracy, and reduced power
dissipation.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation.
Selection Guide
Internal circuit protection includes: thermal shutdown with
hysteresis, undervoltage lockout (UVLO), and crossover-current
protection. Special power-on sequencing is not required.
The A3984 is supplied in a low-profile (1.2 mm maximum),
24-pin TSSOP with exposed thermal pad (package LP ). It is lead
(Pb) free, with 100% matte tin leadframe plating.
Part Number
A3984SLPTR-T
Packing
4000 pieces per 13-in. reel
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Symbol
V BB
Notes
Rating
35
Units
V
Output current rating may be limited by duty cycle, ambient
Output Current
I OUT
temperature, and heat sinking. Under any set of conditions,
do not exceed the specified current rating or a junction tem-
±2
A
perature of 150°C.
Logic Input Voltage
Sense Voltage
Reference Voltage
V IN
V SENSE
V REF
–0.3 to 7
0.5
4
V
V
V
Operating Ambient Temperature
Maximum Junction
Storage Temperature
T A
T J (max)
T stg
Range S
–20 to 85
150
–55 to 150
oC
oC
oC
THERMAL CHARACTERISTICS
Characteristic
Symbol
Test Conditions*
Value Units
Package Thermal Resistance
R θ JA
4-layer PCB, based on JEDEC standard
28
oC/W
*Additional thermal information available on Allegro Web site.
5.5
5.0
4.5
4.0
Maximum Power Dissipation, P D (max)
3.5
3.0
2.5
(R
θ J
A
=
28
oC
/W
)
2.0
1.5
1.0
0.5
0.0
20
40
60
80 100 120
140
160
180
Temperature (°C)
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
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