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参数资料
| 型号： | TA8428K |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 3 A, PSFM7 |
| 封装： | 2.54 MM PITCH, PLASTIC, HSIP-7 |
| 文件页数： | 10/15页 |
| 文件大小： | 439K |
| 代理商： | TA8428K |
TA8428K/FG
2010-02-23
4
OVERCURRENT PROTECTION (ISD)
Basic Operation
When output sink and source currents (TA8428K: at pins 3 and 5; TA8428FG: at pins 15 and 16) are equal to
or lower than the overcurrent threshold, output signals are controlled by input signals. However, when any of
these currents exceed the threshold, outputs are turned on and off periodically as shown in Figure 1.
Figure 1 Basic Operation
Functional Description
The output current is sensed by monitoring the VBE voltage at each output transistor. The current sensor is
connected to each output transistor and to the ISD circuit. If a current higher than the overcurrent threshold
flows through any one of the four output transistors, the ISD circuit is activated. This circuit incorporates a
timer. If the overcurrent condition persists for 20
μs (typ.), the output is switched to a high-impedance state.
Then, it is turned back on after 80 μs (typ.). If the overcurrent condition still persists at this time, the ISD
circuit repeats this overcurrent protection sequence until the overcurrent condition is removed.
This circuit cannot protect the device from all types of over currents. If the outputs are short-circuited to
each other or to ground, the IC may be permanently damaged before the protection circuit is activated.
Therefore, a resistor or fuse should be connected in the supply voltage line.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TA8428K(5,S) | 功能描述:马达/运动/点火控制器和驱动器 BRIDGE DRIVER BRUSHED DC H-SWITCH 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 |
| TA8428K(O,S) | 功能描述:马达/运动/点火控制器和驱动器 BiPolar H-Bridge 1.5A 3.0A 4modes 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 |
| TA8428K(S/5,S) | 制造商:Toshiba 功能描述:Cut Tape |
| TA8428K_07 | 制造商:TOSHIBA 制造商全称:Toshiba Semiconductor 功能描述:FULL BRIDGE DRIVER |
| TA8428K5S | 功能描述:马达/运动/点火控制器和驱动器 Bridge Driver 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 |
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