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参数资料
| 型号： | A4975SLBTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/13页 |
| 文件大小： | 0K |
| 描述： | IC PWM MICROSTEP DVR FULL 16SOIC |
| 特色产品： | A4975 Microstepping Drivers |
| 标准包装： | 1 |
| 应用： | PWM 电机驱动器，步进电机驱动器 |
| 输出数： | 1 |
| 电流 - 输出： | 1.5A |
| 电压 - 负载： | 5 V ~ 50 V |
| 电源电压： | 4.5 V ~ 5.5 V |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 标准包装 |
| 其它名称： | 620-1439-6 |
A4975
Description (continued)
Full-Bridge PWM Microstepping Motor Driver
Internal circuit protection includes thermal shutdown with hysteresis,
an undervoltage monitor, and crossover-current protection. Special
power-up sequencing is not required.
The A4975 is supplied in a choice of two power packages; a 16-pin
dual-in-line plastic package with copper heat-sink tabs (suffix ‘B’),
Selection Guide
and a 16-lead plastic SOIC with internally fused pins (suffix ‘LB’).
For both package styles, the thermally enhanced pins are at ground
potential and need no electrical isolation. Both packages are lead
(Pb) free, with leadframe plating 100% matte tin.
Part Number
A4975SB-T
A4975SLBTR-T
Packing
16-pin DIP with exposed thermal tabs
16-pin SOICW with internally fused pins
Package
25 per tube
1000 per reel
Absolute Maximum Ratings
Characteristic
Load Supply Voltage
Logic Supply Voltage
Logic/Reference Input Voltage Range
Sense Voltage
Symbol
V BB
V CC
V IN
V S
Notes
Rating
50
6
–0.3 to 6
0.5
Units
V
V
V
V
Output current rating may be limited by duty cycle, ambient
Output Current, Continuous
I OUT
temperature, and heat sinking. Under any set of conditions, do
not exceed the speci ? ed current rating or a junction tempera-
±1.5
A
ture of 150 ° C.
Package Power Dissipation
P D
See graph
W
Operating Ambient Temperature
T A
Range S
–20 to 85
oC
Fault conditions that produce excessive junction temperature
Maximum Junction Temperature
Storage Temperature
T J (max)
T stg
will activate the device’s thermal shutdown circuitry. These
conditions can be tolerated but should be avoided.
150
–55 to 150
oC
oC
Thermal Characteristics
Characteristic
Package Thermal Resistance, Junction
to Ambient
Package Thermal Resistance, Junction
to Tab
Symbol
R θ JA
R θ JT
Test Conditions*
2
B Package, single-layer PCB, 1 in. 2 2-oz. exposed copper
LB Package, 2-layer PCB, 0.3 in. 2-oz. exposed copper each
side
Value
43
67
6
Units
oC/W
oC/W
oC/W
*Additional thermal information available on Allegro website.
4
R θ JT = 6.0°C/W
3
SUFFIX 'B', R θ JA = 43°C/W
2
1
SUFFIX 'LB', R θ JA = 67°C/W
0
25
50
75 100
125
150
TEMPERATURE IN °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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