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| 型号： | A4973SLBTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/11页 |
| 文件大小： | 0K |
| 描述： | IC PWM MOTOR DVR FULL 16SOIC |
| 特色产品： | A4973 Motor Driver |
| 标准包装： | 1 |
| 应用： | 直流电机驱动器，PWM 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： | 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： | 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： | 620-1438-6 |
A4973
Description (continued)
When a logic low is applied to the BRAKE input, the braking
function is enabled. This overrides ENABLE and PHASE to turn
off both source drivers and turn on both sink drivers. The brake
function can be used to dynamically brake brush DC motors.
The A4973 is supplied in a choice of two power packages; a
Selection Guide
Full-Bridge PWM Motor Driver
16-pin dual-in-line plastic package with copper heat-sink tabs,
and a 16-pin plastic SOIC with copper heat-sink tabs. For both
package styles, the power tab is at ground potential and needs no
electrical isolation. Each package type is available in a lead (Pb)
free version (100% matte tin plated leadframe).
Part Number
A4973SB-T
A4973SLBTR-T
Package
16-pin DIP with exposed thermal tabs
16-pin SOICW with internally-fused pins
Packing
25 pieces per tube
1000 pieces 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 SENSE
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.
Transient Output Current
Package Power Dissipation
Operating Ambient Temperature
I OUT
P D
T A
t W < 2 μ s
Range S
6
See graph
–20 to 85
A
W
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
BRAKE
1
V BB
16
LOAD
SUPPLY
R θ JT = 6.0°C/W
Note the A4973SB (DIP) and
the A4973SLB (SOIC) are
electrically identical and share
a common terminal number
assignment.
REF
RC
GROUND
2
3
4
LOGIC
15
14
13
OUTB
MODE
GROUND
3
2
SUFFIX 'B', R θ JA = 43°C/W
GROUND
5
12
GROUND
LOGIC
SUPPLY
PHASE
6
7
V CC
11
10
SENSE
OUTA
1
SUFFIX 'LB', R θ JA = 67°C/W
ENABLE
8
V BB
9
LOAD
SUPPLY
0
25
50
75 100
125
150
TEMPERATURE IN °C
Dwg. PP-056
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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