A3958SB

更新时间： 2024-01-28 02:52:43

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
12页	177K
描述
DMOS FULL-BRIDGE PWM MOTOR DRIVER

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

A3958SB 数据手册

3958

DMOS FULL-BRIDGE

PWM MOTOR DRIVER

APPLICATIONS INFORMATION

Current Sensing. To minimize inaccuracies in sensing

the I_TRIPcurrent level, which may be caused by ground

trace IR drops, the sense resistor should have an

independent ground return to the ground terminal of the

device. For low-value sense resistors the IR drops in the

PCB sense resistor’s traces can be significant and should

be taken into account. The use of sockets should be

avoided as they can introduce variation in R_Sdue to their

contact resistance.

The maximum value of R_Sis given as R_S≤ 0.5/I_TRIP

Braking. The braking function is implemented by

driving the device in slow-decay mode via serial port bit

D13, enabling synchronous rectification via bit D12, and

chopping with the combination of D14 and the ENABLE

input terminal. Because it is possible to drive current in

either direction through the DMOS drivers, this

configuration effectively shorts out the motor-generated

BEMF as long as the ENABLE chop mode is asserted. It

is important to note that the internal PWM current-control

circuit will not limit the current when braking, because the

current does not flow through the sense resistor. The

maximum brake current can be approximated by V_BEMF

R_L. Care should be taken to ensure that the maximum

ratings of the device are not exceeded in worst-case

braking situations of high speed and high inertial loads.

Thermal Protection. Circuitry turns off all drivers

when the junction temperature reaches 165°C typically. It

is intended only to protect the device from failures due to

excessive junction temperatures and should not imply that

output short circuits are permitted. Thermal shutdown has

a hysteresis of approximately 15°C.

Layout. The printed wiring board should use a heavy

ground plane. For optimum electrical and thermal perfor-

mance, the driver should be soldered directly onto the

board. The ground side of R_Sshould have an individual

path to the ground terminals of the device. This path

should be as short as is possible physically and should not

have any other components connected to it. It is recom-

mended that a 0.1 µF capacitor be placed between SENSE

and ground as close to the device as possible; the load

supply terminal, V_BB, should be decoupled with an

electrolytic capacitor (> 47 µF is recommended) placed as

close to the device as is possible.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

1...5 6 789 10 11 12

中文翻译

下载PDF

与A3958SB相关器件

型号	品牌	获取价格	描述	数据表
A3958SB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLBTR	ALLEGRO	获取价格	DMOS Full-Bridge PWM Motor Driver
A3958SLBTR-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3958SLB-TTR	ALLEGRO	获取价格	Brushless DC Motor Controller, 2A, NMOS, PDSO24, LEAD FREE, BATWING, PLASTIC, SOIC-24
A3959	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3959SB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3959SB-T	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER
A3959SLB	ALLEGRO	获取价格	DMOS FULL-BRIDGE PWM MOTOR DRIVER

与A3958SB相关文章

深入解读IR2103资料手册：引脚说明、电气参数及替换型号推荐
2024-06-06

2
L7805CV手册解读：引脚说明、替代型号推荐、好坏检测
2024-06-06

2
MMBT5551资料手册解读：电气参数、替换型号推荐
2024-06-06

2
APW7073资料手册解读：产品特性、引脚说明、替换型号推荐
2024-06-06

1

产品中心

服务支持

精选活动

关于我们

帮助中心

A3958SB

A3958SB 数据手册

与A3958SB相关器件

与A3958SB相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

A3958SB

A3958SB 数据手册

与A3958SB相关器件

与A3958SB相关文章

您还可以找

您在本页遇到什么问题？