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UCD3138128 Datasheet(PDF) 14 Page - Texas Instruments

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Part # UCD3138128
Description  UCD3138x Highly-Integrated Digital Controller For Isolated Power
PDF  80 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCD3138128 Datasheet(HTML) 14 Page - Texas Instruments

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t
POR
undefined
V33D
IReset
3.3 V
VGH
VGL
Vres
t
t
Brown Out
t
POR
UCD3138128, UCD3138A64
SLUSBZ8A – JUNE 2014 – REVISED SEPTEMBER 2014
www.ti.com
8.9 Power On Reset (POR) / Brown Out Detect (BOD)
Figure 3. Power On Reset (POR) / Brown Out Reset (BOR)
VGH –
This is the V33A threshold where the internal power is declared good. The UCD3138x comes out
of reset when above this threshold.
VGL –
This is the V33A threshold where the internal power is declared bad. The device goes into reset
when below this threshold.
Vres –
This is the V33A threshold where the internal reset signal is no longer valid. Below this threshold
the device is in an indeterminate state.
IReset –
This is the internal reset signal. When low, the device is held in reset. This is equivalent to holding
the reset pin on the IC low.
tPOR –
The time delay from when VGH is exceeded to when the device comes out of reset.
Brown
This is the V33A voltage threshold at which the device sets the brown out status bit. In addition an
Out –
interrupt can be triggered if enabled.
14
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Copyright © 2014, Texas Instruments Incorporated
Product Folder Links: UCD3138128 UCD3138A64



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