TLE9871QXA20_15 Datasheet, PDF (16/122 Pages) Infineon Technologies AG – Microcontroller with PWM Interface and BLDC MOSFET Driver for Automotive Applications

TLE9871QXA20
Modes of Operation
Sleep Mode is activated after 5 consecutive watchdog failures or in case of supply failure (5 times). In this case,
MON is enabled as the wake source and Cyclic Wake-Up is activated with 1s of wake time.
Sleep Mode with Cyclic Wake-Up
The Cyclic Wake-Up Mode is a special operating mode of the Sleep Mode. The transition to Cyclic Wake-Up Mode
is performed by first setting the corresponding bits in the mode control register followed by the Sleep and Stop
Mode command. In addition to the cyclic wake-up behavior (wake-up after a programmable time period),
asynchronous wake events via the activated sources (PWM interface and/or MON) are available, as in normal Sleep
Mode.
When using Sleep Mode with cyclic wake-up the voltage regulator is switched off and started again with the wake.
A limited number of registers is buffered during sleep, and can be used by SW e.g. for counting sleep/wake cycles.
MCU Slow Down Mode
In MCU Slow Down Mode the MCU frequency is reduced for saving power during operation. PWM communication
is still possible. LS MOSFET can be activated.
Wake-Up Source Prioritization
All wake-up sources have the same priority. In order to handle the asynchronous nature of the wake-up sources,
the first wake-up signal will initiate the wake-up sequence. Nevertheless all wake-up sources are latched in order
to provide all wake-up events to the application software. The software can clear the wake-up source flags. This
is to ensure that no wake-up event is lost.
As default wake-up source, the MON input is activated after power-on reset only. Additionally, the device is in
Cyclic Wake-Up Mode with the max. configurable dead time setting.
The following table shows the possible power mode configurations including the Stop Mode.
Table 3 Power Mode Configurations
Module/Function
Active Mode Stop Mode
VDDEXT
ON/OFF
ON (no dynamic
load)/OFF
Bridge Driver
ON/OFF
OFF
PWM TRx
ON/OFF
wake-up only/
OFF
VS sense
ON/OFF
brownout
detection
brownout detection
GPIO 5V (wake-up)
n.a.
disabled/static
GPIO 5V (active)
ON
ON
WDT1
ON
OFF
CYCLIC WAKE
Measurement
MCU
n.a.
ON¹⁾
ON/slow-
down/STOP
cyclic wake-up/
cyclic sense/OFF
OFF
STOP²⁾
CLOCK GEN (MC)
ON
OFF
Sleep Mode
OFF
OFF
wake-up only/
OFF
POR on VS
OFF
OFF
OFF
cyclic wake-up/
OFF
OFF
OFF
OFF
Comment
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–
brownout det. done in
PCU
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–
–
–
–
–
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Data Sheet
16
Rev. 1.0, 2015-04-30