Datasheet > TMC249-SA

TMC249-SA

更新时间： 2024-01-26 18:08:58

品牌	Logo	应用领域
其他 - ETC		驱动器传感器电机
页数	文件大小	规格书
25页	206K
描述
High Current Microstep Stepper Motor Driver with sensorless stall detection, protection / diagnostics and SPI Interface

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技术参数
数据手册

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TMC249-SA 技术参数

是否Rohs认证：	符合	生命周期：	Contact Manufacturer
包装说明：	SOP, SOP28,.4	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.74
JESD-30 代码：	R-PDSO-G28	JESD-609代码：	e3
湿度敏感等级：	2	端子数量：	28
最高工作温度：	125 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP28,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	电源：	3.3/5,7/30 V
认证状态：	Not Qualified	子类别：	Motion Control Electronics
最大供电电流 (Isup)：	1.35 mA	表面贴装：	YES
技术：	CMOS	温度等级：	AUTOMOTIVE
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
Base Number Matches：	1

TMC249-SA 数据手册

TMC249 / TMC249A DATA SHEET (V2.02 / Aug 12th, 2005)

Selecting Power Transistors

Selection of power transistors for the TMC249 depends on required current, voltage and thermal

conditions. Driving transistors directly with the TMC249 is only limited by the gate capacity of these

transistors. If the total gate charge is too high, slope time increases and leads to a higher switching

power dissipation. Typical applications can reach a current in excess of 4A, while the maximum

voltage is limited to 30V. A total gate charge of below 10nC per transistor is recommended. The table

below shows a choice of transistors which can be driven directly by the TMC249. The maximum

application current mainly is a function of cooling and environment temperature. The given values are

more conservative. Peak currents typically can be higher by a factor of 1.5 for a limited time.

List of recommended transistors

Manufacturer Package

Volts N-type RDS_ONTotal gate

Typical maximum

Remark

and type

Siliconix

SI 7501DN

Siliconix

SI 4539ADY

Siliconix

SI 5504

IRF 9952

(/ IRF 7509)

Siliconix

(#Trans)

PPack

(1N,1P)

SO8

(1N,1P)

1206-8

(1N,1P)

SO8

Volts P-type [Ohm] charge [nC] application current

30V

0.03

0.05

0.04

0.06

0.09

0.17

0.10

0.25

0.48

5.0

8.0

7.5

9.0

3.0

3.2

4.5

4.0

0.8

4000mA

(1)

3500mA

2000mA

2500mA

(1N,1P)

SOT363-6 30V

(2P)

200mA unipolar

SI 1901

Fairchild Semi SO8

FDS 8333C (1N,1P)

30V

0.08

0.13

2.9

3.0

3000mA

6000mA (2 devices

in parallel)

(1) These transistor types have a very high drain to gate capacity (P-channel), which may introduce

destructive current impulses into the HA/HB outputs by forcing them above the power supply level,

depending on the low-side slope. To ensure reliability, connect one ZHCS1000 SOT23 or an SS16 1A

schottky diode or similar to both HA and HB outputs against VS to protect them.

Layout Considerations

For optimal operation of the circuit a careful board layout is important, because of the combination of

high current chopper operation coupled with high accuracy threshold comparators. Please pay special

attention to massive grounding. Depending on the required motor current, either a single massive

ground plane or a ground plane plus star connection of the power traces may be used. The schematic

shows how the high current paths can be routed separately, so that the chopper current does not flow

through the system’s GND-plane. Tie the TMC249’s AGND and GND to the GND plane. Additionally,

use enough filtering capacitors located near to the board’s power supply input and small ceramic

capacitors near to the power supply connections of the TMC249. Use low inductance sense resistors,

or add a ceramic capacitor in parallel to each resistor to avoid high voltage spikes. In some

applications it may become necessary to introduce additional RC-filtering into the SRA / SRB line, as

optional voltage

shown in the schematic, to prevent spikes from

divider

triggering the short circuit protection or the

chopper comparator. If you want to take

advantage of the thermal protection and

diagnosis, ensure, that the power transistors

are very close to the package, and that there is

a good thermal contact between the TMC249

and the external transistors. Please be aware,

that long or thin traces to the sense resistors

may add substantial resistance and thus

reduce output current. The same is valid for the

high side shunt resistor.

100nF

R_DIV

100R

+VM

GND

TMC249/

TMC239A

Bridge A Bridge B

optional filter

SRA

SRB

C_VM

100R

R_SA

R_SB

100R

3.3 -

10nF

AGND

GND-

Plane

1...3 4 567 8 9...25

中文翻译

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与TMC249-SA相关器件

型号	品牌	描述	获取价格	数据表
TMC-25-.178-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.178ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格
TMC-25-.215-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.215ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格
TMC-25-.221-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.221ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格
TMC-25-.348-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.348ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格
TMC-25-.365-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.365ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格
TMC-25-.383-1%	VISHAY	Fixed Resistor, Wire Wound, 25W, 0.383ohm, 550V, 1% +/-Tol, -50,50ppm/Cel,	获取价格

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