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A3979SLPTR PDF预览

A3979SLPTR

更新时间: 2024-02-14 16:09:29
品牌 Logo 应用领域
急速微 - ALLEGRO 驱动器
页数 文件大小 规格书
15页 330K
描述
Stepper Motor Controller, 2.5A, BCDMOS, PDSO28, 1.2 MM HEIGHT, EXPOSED PAD, MO-153AET, TSSOP-28

A3979SLPTR 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:TSSOP
包装说明:HTSSOP, TSSOP28,.25针数:28
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:1.13
模拟集成电路 - 其他类型:STEPPER MOTOR CONTROLLERJESD-30 代码:R-PDSO-G28
JESD-609代码:e3长度:9.7 mm
湿度敏感等级:2功能数量:1
端子数量:28最高工作温度:85 °C
最低工作温度:-20 °C最大输出电流:2.5 A
封装主体材料:PLASTIC/EPOXY封装代码:HTSSOP
封装等效代码:TSSOP28,.25封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
电源:3.3/5,35 V认证状态:Not Qualified
座面最大高度:1.2 mm子类别:Motion Control Electronics
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):3 V
标称供电电压 (Vsup):5 V表面贴装:YES
技术:NMOS温度等级:OTHER
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:4.4 mm
Base Number Matches:1

A3979SLPTR 数据手册

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A3979  
Microstepping DMOS Driver with Translator  
Features and Benefits  
±2.5 A, 35 V output rating  
Description  
The A3979 is a complete microstepping motor driver with  
Low RDS(On) outputs: 0.28 Ω source, 0.22 Ω sink, typical  
Automatic current decay mode detection/selection  
3.0 to 5.5 V logic supply voltage range  
Slow, Fast or Mixed current decay modes  
Home output  
Synchronous rectification for low power dissipation  
Internal UVLO and thermal shutdown circuitry  
Crossover-current protection  
built-intranslator,designedasapin-compatiblereplacementfor  
the successfulA3977, with enhanced microstepping ( /16 step)  
1
precision. It is designed to operate bipolar stepper motors in  
full-, half-, quarter-, and sixteenth-step modes, with an output  
drive capacity of up to 35 V and ±2.5A. TheA3979 includes a  
fixedoff-timecurrentregulatorthathastheabilitytooperatein  
Slow, Fast, or Mixed decay modes. This current-decay control  
scheme results in reduced audible motor noise, increased step  
accuracy, and reduced power dissipation.  
The translator is the key to the easy implementation of the  
A3979. It allows the simple input of one pulse on the STEP  
pin to drive the motor one microstep, which can be either a full  
step, half, quarter, or sixteenth, depending on the setting of the  
MS1andMS2logicinputs.Therearenophase-sequencetables,  
high-frequencycontrollines,orcomplexinterfacestoprogram.  
The A3979 interface is an ideal fit for applications where a  
complex microprocessor is unavailable or is overburdened.  
Package: 28 lead TSSOP (suffix LP) with  
exposed thermal pad  
Internalsynchronous-rectificationcontrolcircuitryisprovided  
to improve power dissipation during PWM operation. Internal  
circuit protection includes: thermal shutdown with hysteresis,  
UVLO (undervoltage lockout), and crossover-current  
protection. Special power-on sequencing is not required.  
Continued on the next page…  
Device Diagram  
1
2
28  
27  
26  
25  
24  
23  
22  
21  
20  
19  
18  
17  
16  
15  
SENSE1  
HOME  
DIR  
VBB1  
SLEEP  
ENABLE  
OUT1B  
CP2  
3
4
OUT1A  
PFD  
5
PWM  
Timer  
Charge  
Pump  
6
RC1  
CP1  
Translator  
and  
Control  
Logic  
7
AGND  
REF  
VCP  
8
÷8  
PGND  
VREG  
STEP  
OUT2B  
RESET  
SR  
9
RC2  
Reg  
10  
11  
12  
13  
VDD  
OUT2A  
MS2  
MS1  
SENSE2 14  
VBB2  
AGND and PGND must be  
connected together externally  
26184.23C  

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