TLE7263E Infineon Technologies, TLE7263E Datasheet - Page 27

• Manufacturer Part Number: TLE7263E
• Description: IC SYSTEM BASIS CHIP DSO-36
• Manufacturer: Infineon Technologies

Specifications of TLE7263E

• Controller Type: System Basis Chip
• Interface: SPI
• Voltage - Supply: 13.5V
• Current - Supply: 1mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: DSO-36
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: SP000075929; TLE7263E; TLE7263EINTR

4.13
The sense comparator (early warning function) compares a voltage defined by the user
to an internal reference voltage. Therefore the voltage to be supervised has to be scaled
down by a voltage divider in order to compare it to the internal sense threshold
feature can be used e.g. to supervise the battery voltage in front of the reverse protection
diode. The microcontroller is given a prewarning before an undervoltage reset due to low
input voltage occurs. The prewarning is flagged by setting the interrupt output INT low in
SBC Active, Standby, and Stop, as well as in CAN Receive - Only Mode, when activated
by SPI. In SBC Sleep Mode the sense function is inactive.
Calculation of the voltage divider can be easily done since the sense input current can
be neglected. An internal blanking time prevents from false triggering due to line
transients. Further improvement is possible by the use of an external ceramic capacitor
at the SI pin (see
4.14
Should the internal supply voltage become lower than the internal threshold
2.5 V) the
condition. All other SPI settings are also reset by this condition. The
also be used to give an indication when the ECU has been changed and therefore a pre-
setting routine of the microcontroller has to be started.
Further there is also a
threshold voltage
monitoring is only available during voltage-regulator operation.
4.15
In addition to a wake-up from SBC Sleep mode via the CAN or LIN bus lines it is also
possible to wake-up the TLE 7263E from low power mode via the monitoring/wake-up
inputs. These inputs are sensitive to a transition of the voltage level, either from high to
low or vice versa. Monitoring is available in Active Mode and indicates the voltage level
of the inputs.
A positive or negative voltage edge at MONx in SBC Sleep or Stop Mode results in
setting the output WKO low to signal a wake-up. After a wake-up via MONx the first
transmission of the SPI diagnosis word in SBC Standby mode indicates the wake-up
source. Further SPI status word transmissions show the logic level of the monitoring
inputs.
When switching the TLE 7263E into SBC Sleep mode (cyclic sense feature activated)
the voltage level at the wake-up inputs is sensed 2 times to initialize the reference
voltage. Should this initialization fail (2 samples are unequal) the device is automatically
Data Sheet
V
Sense Comparator using Sense Input SI and Interrupt Output
INT
V
Monitoring / Wake-Up Inputs MON1/2/3/4 and Wake-Up Output
WKO
INT
INT
-Fail, threshold SPI bit will be reset in order to indicate the low voltage
/ V
Figure
CC
V
CCx-Fail, threshold
Fail Detection via SPI Bit
V
22,
CC
monitor implemented, where the
Application
and the
Circuit).
27
V
CC
SPI bit is reset accordingly. This
V
CCx
Rev. 1.51, 2007-06-22
V
is compared to the
INT
Fail feature can
TLE 7263E
V
V
INT, th
Features
SIth
. This
(typ.