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参数资料
| 型号： | TA8050F |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, PDSO20 |
| 封装： | 0.450 INCH, 1 MM PITCH, HEAT SINK, POWER, PLASTIC, SOP-20 |
| 文件页数： | 4/9页 |
| 文件大小： | 184K |
| 代理商： | TA8050F |
TA8050F
2002-02-27
4
3. Overcurrent protections (ISD)
Basic operation
When the output current (M (
+) or M ()、Isink or Isource) is up to the ISD detection current, the output
is controlled by the input signals. When it exceeds the detection current, the output assumes a
switching waveform as shown in Figure 1.
●
Detailed explanation
The output current is detected by monitoring the VBE from each output transistor. One detection circuit
connects to one of the output transistors and leads to the short-circuit protection circuit. When a
current exceeding the ISD detection current flows through one of the four output transistors, the
short-circuit protection circuit is activated. This circuit contains a timer. When overcurrent condition
continues for 20
s (typically) , the protection circuit places the output in high-impedance mode and, 80
s (typically) later, returns the IC to ON mode. The switching-waveform output is repeated until
overcurrent condition is no longer present.
ON
ISD or more
20
s Typ.
80
s Typ.
ON
OFF
Figure 1 Basic operation
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