TLE7230R Datasheet, PDF (7/16 Pages) Infineon Technologies AG – Smart Octal Low-Side Switch

Target Datasheet TLE7230 R/G
Functional Description
The TLE 7230 R/G is an octal-low-side power switch which provides a serial peripheral interface (SPI)
to control the 8 power DMOS switches, as well as diagnostic feedback. The power transistors are pro-
tected⁴⁾ against overload (current limitation), overtemperature and against overvoltage by an active
zener clamp. The diagnostic logic recognizes a fault condition which can be read out via the serial di-
agnostic output (SO).
Output Stage Control: Parallel Control or SPI Control
The Output stages can be controlled by parallel Inputs or by SPI command. The IC can be pro-
grammed (by SPI) to switch the outputs according to the corresponding SPI command bit or to a com-
bination of SPI bit and parallel input signal. The logic combination of parallel and serial signal is pro-
grammable by SPI (Boolean operation) to logic "AND" or "OR" The respective SPI databits are high
active, the parallel Inputs are high or low active according to the PRG pin (see pin description).
Boolean operation:
The logic combination of the parallel and the
serial input signal can be configured by an
SPI command for each of the 8 channels
individually. Logic "AND" or logic "OR" is
possible.
parallel in serial in
off
off
off
on
on
off
on
on
Output "OR"
off
on
on
on
Output "AND"
off
off
off
on
Mappable parallel input (IN 4):
By SPI Command the parallel input 4 (IN4 or IN) can be defined as parallel input for one or more power
outputs. Depending on the Input Map Register this input can be used to controll one up to eight of the
parallel outputs. Default operation: IN4 / IN is the parallel input for channel 4.
Input buffer
IN n (1..3)
Input buffer
IN 4
Input Map register
&
≥1
Boolean register
Input buffer
IN 4
Output Latch
Boolean register
&
≥1
Output Latch
serial controll register
Channel 1 to 3
Signal logic channel 1 to 3
serial controll register
Channel 4 to 8
Input Map register
Signal logic channel 4 to 8
Switching speed / Slew rate:
The switching speed / slew rate of all 8 channels can be configured by SPI for slow or fast switching
speed (1:5) for each channel individually.
Overtemperature Behavior:
Each channel has an overtemperature sensor and is individually protected against overtemperature.
As soon as overtemperature occurs the channel is immediately turned off and the overtmperature in-
formation is reported by diagnosis. In this case there are two different behaviours of the affected chan-
nel that can be selected by SPI (for all channels individually).
Autorestart: as long as the input signal of the channel remains on (e.g. parallel input high) the channel
turns automatically on again after cooling down.
4 _{)The integrated protection functions prevent an IC destruction under fault conditions and may not be used in}
normal operation or permanently.
V1.1
Page 7
12. Oct. 2003