12V Automotive Motor Control based on Embedded Power Full Bridge Driver TLE986x/TLE987x - Concept Current Sense Amplifier (CSA)

Open online SPICE simulator circuit link: atv_12V_motor_Embedded_Power_TLE986x_7x_CSA_concept.TSC

12V Automotive Motor Control based on Embedded Power
Full Bridge Driver TLE986x/TLE987x
Concept Circuit Current Sense Amplifier (CSA)

Infineon has combined its wealth of experience in motor control drivers for automotive
applications with all the benefits of an industry-standard core. The unique result, our 3rd
Generation Embedded Power IC based on ARM® Cortex®-M cores, addresses a wide
range of smart 3-phase brushless DC motor control applications like fuel pumps,
HVAC fans, engine cooling fans, electrical water pumps. The TLE987x family offers
scalability in terms of flash memory sizes and MCU system clock frequency
supporting a wide range of motor control algorithms, either sensor-based or sensor-less.
It uses the same MCU and peripherals as the TLE986x family, 2-phase driver, enabling
design synergies between DC and BLDC motor control applications.

The test bench shows a simplified low side current sense application (CSA, current sense
amplifier, including operational amplifier and ADC), where the motor current is emulated
with an ideal current source Iload. This current is sensed as a voltage drop on the shunt
resistor RSH, amplified by the CSA and then provided as an analog voltage at the output.

INPUT:
Programmable gain settings G: 10 / 20 / 40 / 60
Input Resistance RIN @OP1 OP2: 1.0 kΩ – 1.5 kΩ

OUTPUT:
Continuous and Discrete output voltage in range [0 – 1023] (10 bit resolution)