EPC700 EPC [Espros Photonics corp], EPC700 Datasheet - Page 4

• Manufacturer Part Number: EPC700
• Description: 24V/50mA General-Purpose Output-Driver
• Manufacturer: EPC [Espros Photonics corp]

Functional Description
Normal Operation
During typical operation the OUT follows the IN as shown in Figure 1. As long as the output current does not exceed the current threshold,
OUT is stable ON and STATUS is stable HIGH-Z. The delay from IN to OUT is defined as t
respectively.
Please note that the status of the pin OUT is dependent whether the chip is operated with or without external driver transistor. In the
subsequent diagrams, the version with external driver transistor is shown only.
Over-current Sequence
A short on the load side will lead to an over-current through OUT. If an over-current stays longer than the time t
shown in the figure below. At the same time STATUS changes its state to indicate an over-current situation to an external controller. STATUS
can also be used to drive directly an indicator LED due to its 10mA driving capability. epc700 delivers a constant on-signal, whereas epc702
has a flashing output.
Note: The parameter t
© 2011 ESPROS Photonics Corporation
Characteristics subject to change without notice
ext
STATUS
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This document is confidential and protected by law and international trades. It must not be shown to any third party nor be copied in any form without our written permission
File:
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SHORT
STATUS
epc702
used in this paper is described in Figure 7.
SENS
epc700
external Transistor)
external Transistor)
OUT
IN
OUT (without
0
0
0
0
HIGH-Z
HIGH-Z
OUT (with
STATUS
SHORT
SENS
STATUS
epc702
Timing diagram operation mode
epc700
epc700
IN
0
HIGH-Z
V
0
0
HIGH-Z
HIGH-Z
Sat
V
V
th sens
t
th sens
on
V
VDD
Sat
Figure 2: Short circuit detection
Figure 1: Normal operation
t
ext
t
t
t
t
LED
LED
LED
LED
t
del
4
LST
t
off
t
LED
t
t
t
t
LED
LED
LED
LED
ON
and t
OFF
05.01.2011
05.01.2011
Page 1
Page 1
for the rising and the falling edge
del
Datasheet epc700_702 - V2.2
and t
epc700/epc702
ext
, OUT is turned off as
.
.
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