Fig. 10-2 Current Measurement Channel - ETAS ES930.1 User Manual

ETAS
The power MOSFETs are integrated in the Infineon TLE7182EM driver IC (see
chapter 13.9.8 on page 100).
10.3.3 External operating Voltage
The power stages are not supplied by the internal operating voltage of the
power supply of the module, but by an external operating voltage which must
be connected to the "PS" connection.
10.3.4 Channel for Current Measurement (Current Sense PS n)
10.3.4.1 Overview
Current Sense PS n
Fig. 10-2
The two Half-bridges of each channel group are equipped with one channel
each in the output branch for the current measurement (Current Sense PS n).
The channels for the current measurement feature identical designs in all Half-
bridges and consist of the following assemblies (see block diagram in Fig. 10-2
on page 61):
• Anti-aliasing filter
• A/D converter
• Digital filter
– CIC filter
– IIR filter
– Digital filter jumpered
The functionality of all channels for current measurement can be configured
separately.
NOTE
The six channels for the Current Sense PS n current measurement receive the
same setting of the sampling rate during the configuration.
The Current Sense PS channel measures the current in the output path of the
Half-bridge and transfers the measured value to the application program. The
measured current is used as controlled variable for the control and monitoring
of the Half-bridge.
10.3.4.2 Anti-aliasing Filter
The anti-aliasing filter is a 1st order analog low-pass with a limit frequency of
15 kHz. The filter can be neither configured nor bridged.
ES930.1 - User Guide
14 Bit A/D
Convert er
Ant i
Aliasing
Current Measurement Channel
Half-bridges ("PS" Connection)
Current Input PS n
CIC
IIR
M easure-
ment Unit
61