12ASX2 datasheet(21/147 Pages) INFINEON

21 / 147 page

EiceDRIVER

™ SIL

1EDI2002AS

Functional Description

Datasheet

Rev. 3.1, 2015-07-30

Hardware Description

2.4

Functional Block Description

2.4.1

Power Supplies

On the primary side, the 1EDI2002AS needs a single 5 Vsupply source V

CC1 for proper operation. This makes the

device compatible to most of the microcontrollers available for automotive applications.

On the secondary side, the 1EDI2002AS needs two power supplies for proper operation.

•

The positive power supply V

CC2 is typically set to 15 V (referring to VGND2).

•

The negative supply V

EE2 is typically set to -8 V (referring to VGND2).

Under- and over-voltage monitoring is performed continuously during operation of the device (see Chapter 3.3.1).

A 5V supply for the digital domain on the secondary side is generated internally (present at pin VREG).

2.4.2

Clock Domains

The clock system of the 1EDI2002AS is based on three oscillators defining each a clock domain:

•

One RC oscillator (OSC1) for the primary chip.

•

One RC oscillator (OSC2) for the secondary chip excepting the output stage.

•

One Start-Stop oscillator (SSOSC2) for the output stage on the secondary side.

The two RC oscillators are running constantly. They are also monitored constantly, and large deviations from the

nominal frequency are identified as a system failure (Event Class B, see Chapter 3.3.2.2).

The Start Stop oscillator is controlled by the PWM command.

12ASX2 Datasheet(PDF) 21 Page - Infineon Technologies AG