UCD3138128PFC datasheet(14/80 Pages) TI

Nome de Peças	UCD3138128PFC

Descrição Electrónicos	UCD3138x Highly-Integrated Digital Controller For Isolated Power

PDF	80 Pages

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Fabricante Electrônico	TI [Texas Instruments]

Página de início	http://www.ti.com

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14 / 80 page

POR

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V33D

IReset

3.3 V

VGH

VGL

Vres

Brown Out

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This is the V33A threshold where the internal reset signal is no longer valid.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.

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Product Folder Links: UCD3138128 UCD3138A64

UCD3138128PFC Folha de dados(PDF) 14 Page - Texas Instruments