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参数资料
| 型号： | TB62214FTG |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 2 A, PQCC48 |
| 封装： | 7 X 7 MM, 0.50 MM PITCH, ROHS COMPLIANT, PLASTIC, QFN-48 |
| 文件页数： | 11/27页 |
| 文件大小： | 687K |
| 代理商： | TB62214FTG |
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TB62214FG/FTG
2010-06-10
19
Overcurrent Shutdown (ISD) Circuitry
ISD Masking Time and ISD On-Time
The overcurrent shutdown (ISD) circuitry has a masking time to prevent current spikes during Irr and
switching from erroneously tripping the ISD circuitry. The masking time is a function of the chopper
frequency obtained by CR:
masking_time
= 4 × CR_frequency
The minimum and maximum times taken to turn off the output transistors since an overcurrent flows into
them are:
Min: 4
× CR_frequency
Max: 8
× CR_frequency
It should be noted that these values assume a case in which an overcurrent condition is detected in an ideal
manner. The ISD circuitry might not work, depending on the control timing of the output transistors.
Therefore, a protection fuse must always be added to the VM power supply as a safety precaution. The
optimal fuse capacitance varies with usage conditions, and one that does not adversely affect the motor
operation or exceed the power dissipation rating of the TB62214FG/FTG should be selected.
Calculating OSCM Oscillating Frequency
The OSCM oscillating frequency can be approximated using the following equation:
Where:
C = Capacitor capacity
R1= Resistance
Assigning C = 270
× 1012 [F], R1= 3600 [] to get:
fOSCM = 1.61 × 106 1.6 MHz
OSC_M oscillation
(chopper waveform)
An overcurrent starts flowing into the output transistors
Disabled (reset state)
ISD masking time
min
max
min
max
1 chopping cycle
ISD on-time
)
R
(
C
.
fOSCM
500
56
0
1
1 +
×
=
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TB62215AFG(O,8,EL) | 功能描述:马达/运动/点火控制器和驱动器 PWM Method Clock BiCD 40V 3.0A RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TB62215AFNG(OC8,EL | 功能描述:马达/运动/点火控制器和驱动器 PWM Method Clock BiCD 40V 3.0A RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TB62215AFTG(O,8,EL | 功能描述:马达/运动/点火控制器和驱动器 PWM Method Clock BiCD 40V 3.0A RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TB62215AHQ(O) | 功能描述:马达/运动/点火控制器和驱动器 PWM Method Clock BiCD 40V 3.0A RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| TB62215SM1 | 制造商:THOMAS & BETTS 功能描述: |
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