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RT9553A Datenblatt(PDF) 10 Page - Richtek Technology Corporation

Teilenummer RT9553A
Bauteilbeschribung  High Accuracy Current/Voltage Sensing and Protection IC
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Hersteller  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT9553A Datenblatt(HTML) 10 Page - Richtek Technology Corporation

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RT9553A
10
DS9553A-00
September 2014
www.richtek.com
©
Copyright
2014 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
RESET/Timer
The RESET pin is an open-drain output, and requires to
be connected to a pull-up resistor. When over-voltage or
under-voltage occurs, the RESET pin will be pulled low
and resume to high with a hysteresis.
Users can set the deglitch time of RESET by adjusting
the TIMER pin, and there are two choices of deglitch time,
15
μs and 5μs. When the RTIMER is 375kΩ, the deglitch
time is 15
μs; when the RTIMER is 125kΩ, the deglitch time
is 5
μs. Users can choose a suitable deglitch time to avoid
protection false triggering.
Figure 4. OVP and RESET Indicator Illustrator
VCSP x (1/9)
EN
VCC
3ms
OVSET
RESET
92%_OVSET
Recovery Hysteresis Range
PROCHOT
The PROCHOT pin is an open-drain output, and requires
to be connected to a pull-up resistor. When over-current
is detected, PROCHOT will be pulled low within 50
μs for
15ms. If over-current condition keeps longer than 15ms,
PROCHOT maintains low status until over-current
protection is released.
Figure 3, Figure 4, Figure5 illustrates RESET and
PROCHOT indicator signals.
Figure 3. RESET and PROCHOT Indicator Illustration
EN
VCC
3ms
ILIM
ISENSE
15ms
>15ms
PROCHOT


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