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TMC249-SA

更新时间： 2024-01-26 02:13:03
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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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,.4Reach Compliance Code：compliant
HTS代码：8542.39.00.01风险等级：5.74
JESD-30 代码：R-PDSO-G28JESD-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

 浏览型号TMC249-SA的Datasheet PDF文件第4页浏览型号TMC249-SA的Datasheet PDF文件第5页浏览型号TMC249-SA的Datasheet PDF文件第6页浏览型号TMC249-SA的Datasheet PDF文件第8页浏览型号TMC249-SA的Datasheet PDF文件第9页浏览型号TMC249-SA的Datasheet PDF文件第10页 
TMC249 / TMC249A DATA SHEET (V2.02 / Aug 12th, 2005)  
7
Using additional Power Drivers  
For higher voltage and higher output current it is possible to add external MOSFET gate drivers. Both,  
dedicated transistor drivers are suitable, as well as a circuit based on standard HCMOS drivers. It is  
important to understand the function of dedicated gate drivers for N-channel transistors: Since the  
chopping also can be stopped in open load conditions, the gate drive circuit for the upper transistors  
should allow for continuous ON conditions. In the schematic below this is satisfied by attaching a weak  
additional charge pump oscillator and pumping the VS up to the high voltage supply. Do not enable  
the TMC249, before the gate driver capacitors are charged to an appropriate voltage. A current  
sensing comparator in the VM line pulling down the VT pin by some 100mV on overcurrent can be  
added, if required. Since the TMC249 in this application can not sense switch-off of the transistor  
gates to ensure break-before-make operation, the break before-make-delays have to be set by  
capacitive loading of its transistor drive outputs. The capacitors CdHS and CdLS are charged /  
discharged with the nominal gate current. The opposite output is not enabled, before the switching-off  
output has been discharged to 0.5V. To calculate the timing, refer to the required logic levels of the  
attached power driver, resp. the attached PMOS. For CdHS and CdLS 470pF give about 100ns. Both  
circuits do not show decoupling capacitors and further details.  
+12V  
VS  
LED  
grn*  
to other  
bridges  
VT  
+VM e.g. 50V  
C-Pump  
20kHz  
ICM7555  
CDHS  
470p  
High current, high  
voltage MOS, e.g.  
SI4450  
1µF  
22K  
HA1  
2n2  
12V  
small signal P-  
MOS, e.g. BSS84  
HS-Driver  
N
N
N
N
390R  
TMC249/  
TMC239  
Coil  
LA1  
LS-  
Driver  
390R  
CDLS  
470p  
IR2101  
SRA  
RS  
100R  
4.7nF  
opt.  
*) The LED increases break-before-make  
time and may be bridged if not desired  
SLP  
10K  
Set HS and LS  
current to 10mA  
+VS 7..15V  
+VM 20..60V  
VS  
VT  
VCC  
1/2 74HC244  
on high side  
High voltage logic  
level MOS bridge  
1K  
120R  
ADJ  
P
P
1K  
100R  
CDHS  
390R  
HA1  
/OE  
LM337  
HV  
GND  
VCC  
55V low current  
N-MOS  
OUT  
VM-5.2V  
+5V  
Coil  
IN  
TMC249/  
TMC239  
1/2 74HC244  
on low side  
LA1  
N
N
1K  
100R  
CDLS  
/OE  
GND  
SRA  
SLP  
RS  
set to 7 mA high-  
side drive current  
15K  
Copyright © 2005, TRINAMIC Motion Control GmbH & Co KG  
1...45678910...25

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