“The three-phase TLE995x for brushless dc motors is ideal for pumps and fans in thermal management systems, while the two-phase TLE994x for brushed dc motors targets comfort functions such as electric seats and power windows,” according to the company. “All devices comply with ISO 26262 ASIL B for functional safety. Additionally, the integrated Arm TrustZone provides a foundation for improved system security.”
There are currently only two ICs in these families – replace the ‘x’ with ‘4’ – each in two temperature ranges, at lease one of which can run with junctions from -40 and 175°C.
A 40MHz Arm Cortex-M23 provides processing, backed by 72kbyte of flash and 6kbyte of ram, which, according to the company, is sufficient for field-oriented control – indeed there is a 150W water pump example design with field-oriented control software*.
The main interface is LIN, with automatic message handling to reduce CPU load.
Operation is from a single rail between 5.5 and 29V, and packaging is 9 x 6mm 32pad TSDSO with a heat removal pad.
Drivers are included for two or three external mosfet half-bridges, supported by an on-chip charge pump.
A low-side shunt amplifier is integrated for current sensing, and there is a comparator as well as a 16 input 12bit ADC for analogue voltages.
As well as an on-chip clock, there is a 24bit system timer and 10 16bit timers.
Logic interfacing is through five GPIOs and three inputs.
*Dissapointingly, just about everything to do with these ICs is under NDA, although this limited overview can be downloaded.
It was over 10 years ago when Infineon launched the prececessors of these ICs
