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A3955 PDF预览

A3955

更新时间: 2024-02-28 10:19:17
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器电机
页数 文件大小 规格书
16页 133K
描述
FULL-BRIDGE PWM MICROSTEPPING MOTOR DRIVER

A3955 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:PLASTIC, SOIC-16
针数:16Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.45其他特性:ADDITIONAL 5V TO 50V VBB POWER SUPPLY ALSO REQUIRED
模拟集成电路 - 其他类型:STEPPER MOTOR CONTROLLERJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:10.3 mm
功能数量:1端子数量:16
最高工作温度:85 °C最低工作温度:-20 °C
最大输出电流:1.5 A封装主体材料:PLASTIC/EPOXY
封装代码:SOP封装等效代码:SOP16,.4
封装形状:RECTANGULAR封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):240电源:5 V
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Motion Control Electronics最大供电电流 (Isup):50 mA
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):4.5 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:BIPOLAR温度等级:OTHER
端子面层:TIN LEAD端子形式:GULL WING
端子节距:1.27 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:7.5 mm
Base Number Matches:1

A3955 数据手册

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3955  
FULL-BRIDGE PWM  
MICROSTEPPING MOTOR DRIVER  
The A3955SB and A3955SLB are designed for driving one winding  
of a bipolar stepper motor in a microstepping mode. The outputs are  
rated for continuous output currents to ±1.5 A and operating voltages  
to 50 V. Internal pulse-width modulated (PWM) current control com-  
bined with an internal three-bit nonlinear digital-to-analog converter  
allows the motor current to be controlled in full-, half-, quarter-, or  
eighth-step (microstepping) modes. Nonlinear increments minimize  
the number of control lines necessary for microstepping.  
LOAD  
SUPPLY  
16  
PFD  
REF  
RC  
1
2
3
V
BB  
OUT  
B
15  
14  
D
0
4
5
6
GROUND  
GROUND  
13 GROUND  
LOGIC  
Microstepping provides for increased step resolution, and reduces  
torque variations and resonance problems at low speed.  
12  
11  
GROUND  
SENSE  
LOGIC  
SUPPLY  
V
CC  
Internal circuitry determines whether the PWM current-control  
circuitry operates in a slow (recirculating) current-decay mode, fast  
(regenerative) current-decay mode, or in a mixed current-decay mode  
in which the off time is divided into a period of fast current decay with  
the remainder of the fixed off time spent in slow current decay. The  
combination of user-selectable current-sensing resistor and reference  
voltage, digitally selected output current ratio; and slow, fast, or mixed  
current-decay modes provides users with a broad, variable range of  
motor control.  
10 OUT  
PHASE  
7
8
A
9
D
2
D
1
Dwg. PP-056-2  
Note the A3955SB (DIP) and the A3955SLB  
(SOIC) are electrically identical and share a  
common terminal number assignment.  
Internal circuit protection includes thermal shutdown with hyster-  
esis, transient-suppression diodes, and crossover current protection.  
Special power-up sequencing is not required.  
ABSOLUTE MAXIMUM RATINGS  
Load Supply Voltage, VBB . . . . . . . . . . 50 V  
Output Current, IOUT  
(Continuous) . . . . . . . . . . . . . . ±1.5 A*  
Logic Supply Voltage, VCC . . . . . . . . . 7.0 V  
The A3955S— is supplied in a choice of two power packages; a  
16-pin dual-in-line plastic package with copper heat-sink tabs (suffix  
‘B’), and a 16-lead plastic SOIC with copper heat-sink tabs (suffix ‘LB’).  
For both package styles, the power tab is at ground potential and  
needs no electrical isolation.  
Logic/Reference Input Voltage Range,  
VIN . . . . . . . . . . . -0.3 V to VCC + 0.3 V  
Sense Voltage, VS . . . . . . . . . . . . . . . . 1.0 V  
Package Power Dissipation,  
FEATURES  
±1.5 A Continuous Output Current  
50 V Output Voltage Rating  
Internal PWM Current Control  
3-Bit Non-Linear DAC  
Fast, Mixed Fast/Slow, and Slow Current-Decay Modes  
Internal Transient-Suppression Diodes  
Internal Thermal-Shutdown Circuitry  
Crossover-Current and UVLO Protection  
PD . . . . . . . . . . . . . . . . . . . . See Graph  
Operating Temperature Range,  
TA . . . . . . . . . . . . . . . . . -20˚C to +85˚C  
Junction Temperature, TJ . . . . . . . +150˚C†  
Storage Temperature Range,  
TS . . . . . . . . . . . . . . . . -55˚C to +150˚C  
* Output current rating may be limited by duty  
cycle, ambient temperature, and heat sinking.  
Under any set of conditions, do not exceed the  
specified current rating or a junction temperature  
of 150˚C.  
† Fault conditions that produce excessive junction  
temperature will activate the device’s thermal  
shutdown circuitry. These conditions can be  
tolerated but should be avoided.  
Always order by complete part number:  
Part Number  
Package  
A3955SB  
16-Pin DIP  
A3955SLB  
16-Lead SOIC  

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