参数资料
型号: A3981KLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 30/43页
文件大小: 0K
描述: IC MOTOR DVR MICROSTEP 28-TSSOP
标准包装: 1
系列: *
应用: *
输出数: *
电流 - 输出: *
电压 - 负载: *
电源电压: *
工作温度: *
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 28-TSSOP 裸露焊盘
包装: 标准包装
其它名称: 620-1458-6
A3981
Automotive, Programmable Stepper Driver
The total power dissipation for each of the four decay modes,
P D(TOT) XX , is the average power for the drive current ramp por-
tion, P D , and the drive current decay portion, P D(XX) of the PWM
cycle. For slow decay the current will be rising for approximately
20% of the cycle and decaying for approximately 80%. For fast
decay the ratio will be approximately 50%. Note that these are
approximate figures and will vary slightly depending on the
motor characteristics and the use of synchronous rectification.
The following formulas may be used to estimate total power dis-
sipation:
? Synchronous slow decay mode
P D(TOT)SS = 0.2 × P D + 0.8 × P D(SS)
P D(TOT)SS = 0.2 ( I 2 [ R DS(on)H + R DS(on)L ]) + 0.8 ( I 2 × 2 × R DS(on)L )
? Non-synchronous slow decay mode
P D(TOT)NS = 0.2 × P D + 0.8 × P D(NS)
P D(TOT)NS = 0.2 ( I 2 [ R DS(on)H + R DS(on)L ]) + 0.8 ( I 2 × R DS(on)L + I × V F )
5
4
3
2
? Synchronous fast decay mode
P D(TOT)SF = 0.5 × P D + 0.5 × P D(SF)
P D(TOT)SF = I 2 ( R DS(on)H + R DS(on)L )
? Non-synchronous fast decay mode
P D(TOT)NF = 0.5 × P D + 0.5 × P D(NF)
P D(TOT)NF = 0.5( I 2 [R DS(on)H + R DS(on)L ] ) + 0.5( I × [ V FH + V FL ] )
An approximation of the total dissipation can be calculated by
summing the total power dissipated in both bridges and adding
the control circuit power due to V BB × I BB and V DD × I DD .
The total power at the required ambient temperature can then be
compared to the allowable power dissipation shown in figure 18.
For critical applications, where the first order power estimate is
close to the allowable dissipation, the power calculation should
take several other parameters into account including: motor
parameters, dead time, and switching losses in the controller.
R θ JA = 28 °C/W
(on 4-layer PCB)
1
R θ JA = 32 °C/W
(on 2-layer PCB)
0
25
50
75
100
125
150
Ambient Temperature (°C)
Figure 18. Allowable power dissipation, on typical PCBs
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
30
相关PDF资料
PDF描述
A3982SLB-T IC MOTOR DRIVER STEPPER 24-SOIC
A3983SLP-T IC MICRO STEPPING DRIVER 24-TSSO
A3984SLP-T IC MICRO STEPPING DRIVER 24-TSSO
A3986SLDTR-T IC DRIVER MICROSTEPPING 38-TSSOP
A3987SLPTR-T IC DRIVER MICROSTEPPING 24-TSSOP
相关代理商/技术参数
参数描述
A3982 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Stepper Motor Driver with Translator
A3982_13 制造商:ALLEGRO 制造商全称:Allegro MicroSystems 功能描述:DMOS Stepper Motor Driver with Translator
A3982SLB 功能描述:IC MOTOR DRIVER STEPPER 24-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器,驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器,步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP(0.295",7.50mm 宽) 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR
A3982SLB-T 功能描述:IC MOTOR DRIVER STEPPER 24-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器,驱动器 系列:- 标准包装:1 系列:- 应用:直流电机驱动器,步进电机驱动器 评估套件:- 输出数:1 或 2 电流 - 输出:750mA 电压 - 负载:10 V ~ 40 V 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 70°C 安装类型:表面贴装 封装/外壳:24-BFSOP(0.295",7.50mm 宽) 供应商设备封装:24-SOP 包装:Digi-Reel® 其它名称:MTS62C19A-HS105DKR
A3982SLB-T 制造商:Allegro MicroSystems 功能描述:Motor Driver IC