AS3412 datasheet(32/85 Pages) AMSOSRAM

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ams Datasheet

Page 31

[v1-00] 2016-Apr-06

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AS3412 − Detailed Description

System

The system block handles the power up and power down

sequencing as well as the mode switching.

Power Up/Down Conditions

The chip powers up when one of the following conditions is

true:

Figure 38:

Power Up Conditions

Power Up Conditions: This table shows the available power up conditions of the AS3412.

The chip automatically shuts off if one of the following

conditions arises:

Figure 39:

Power Down Conditions

Power Down Conditions: This table shows the available power down conditions of the AS3412.

Source

Description

1MODE pin

In stand-alone mode, MODE pin has to be driven high for >2ms to turn on the

device

I²C start

In I²C mode, an I²C start condition turns on the device

Source

Description

1MODE pin

Slider Mode: Mode pin has to be driven low for 10ms to turn off

Push Button Mode: Mode pin has to be driven high for >2.4sec to turn off

2Serial Interface

Power down by serial interface by clearing the PWR_HOLD bit. (Please mind that

the I²C_MODE bit has to be set before clearing the PWR_HOLD bit for security

reasons)

VNEG CP OVC

Power down if VNEG is higher than the VNEG off-threshold

AS3412 Datasheet(PDF) 32 Page - ams-OSRAM AG