Datasheet > EPC700-CSP6

EPC700-CSP6

更新时间： 2024-02-25 07:00:29

品牌	Logo	应用领域
EPC		驱动器
页数	文件大小	规格书
11页	264K
描述
24V/50mA General-Purpose Output-Driver

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中文翻译

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数据手册

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EPC700-CSP6 数据手册

epc700/epc702

Current Peak at OUT

A short current peak when OUT is turned on, typically generated by a capacitive load, could trigger the short-circuit protection logic. However,

if the current peak is shorter than t_extplus t_del, the over-current peak will be ignored.

Make sure that the energy drawn by such a current peak does not destroy the internal/external output transistor.

OUT

HIGH-Z

STATUS

V_{th sens}

SENS

t_ext

del

Figure 3: Short over-current pulse, i.e., by switching a capacitive load

Over-current Reset Sequence

If there is a permanent short circuit at OUT, such short circuit will be detected and OUT is turned off. After a waiting time t_minOFF, the device tries

to turn on OUT again. If the short circuit is still present, OUT is immediately turned off again. This sequence continues until the short circuit is

removed or IN goes to LOW or power is turned off. This mode is called self-healing since the device tries to self-heal the short circuit end to

switch back into normal operation.

As a consequence in the case of a permanent over-current , short current peaks are issued into the load, respectively short.

The time t_minOFFhas to be set to a value that the internal/external switch cannot be damaged by a too high power dissipation. Without an exter-

nal switch, the time t_minOFFhas to be 1,000 times longer than the time t_del

OUT

SHORT

th sens

SENS

t_del

t_ext

minOFF

STATUS

epc700

HIGH-Z

STATUS

epc702

LED

Figure 4: Over-current reset sequence

If one wants to reduce the waiting time in case of a short circuit situation, it can be done by simply taking IN to a low state and then to high

again. Please refer to the timing diagram in Figure 5. However, make sure that the maximum power dissipation of the chip or the external

switching transistor will never be exceeded above the allowed maximum.

OUT

SHORT

V_{th sens}

SENS

t_del

t_ext

minOFF

HIGH-Z

STATUS

Figure 5: Over-current status reset

Characteristics subject to change without notice

Datasheet epc700_702 - V2.2

www.espros.ch

1 2 3 456 7 8...11

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