1EDI2002AS_15 Datasheet, PDF (21/147 Pages) Infineon Technologies AG – Single Channel Isolated Driver for Inverter Systems AD Step

2.4
Functional Block Description
EiceDRIVER™ SIL
1EDI2002AS
Functional 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 V_GND2).
• The negative supply V_EE2 is typically set to -8 V (referring to V_GND2).
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.
Datasheet
21
Hardware Description
Rev. 3.1, 2015-07-30