TLE6240GP Datasheet, PDF (14/23 Pages) Infineon Technologies AG – Smart 16-fold Low-Side Switch

Data Sheet TLE 6240 GP
Control words beside No. 1- 10
Not specified Control words are not executed (cause no function) and the shift register (SO
Data) is reset after the CS signal (all “0”).
Example for an access to channel 1 to 8:
LLHH LLLL HLLH LLLH: OR operation between parallel inputs and data bits, i.e channel 1, 5
and 8 will be switched on.
The next command is now: LHHH LLLL HHHH LLLL
LHHH LLLL as command word has no special meaning and will not be accepted. The output
states will not be changed and the shift register will be reset (at the next CS SO Data all “0”).
Diagnostics
FAULT - Fault pin. There is a general fault pin (open drain) which shows a high to low transi-
tion as soon as an error occurs for any one of the sixteen channels. This fault indication can
be used to generate a µC interrupt. Therefore a ‘diagnosis’ interrupt routine need only be
called after this fault indication. This saves processor time compared to a cyclic reading of the
SO information.
As soon as a fault occurs, the fault information is latched into the diagnosis register. A new
error will over-write the old error report. Serial data out pin (SO) is in a high impedance state
when CS is high. If CS receives a LOW signal, all diagnosis bits can be shifted out serially.
For full diagnosis there are two diagnostic bits per channel configured as shown in Figure 1.
Normal function: The bit combination HH indicates that there is no fault condition, i.e. normal
Diagnostic Serial Data OUT SO
15 14 13 12 11 10 9 8 7 6- - - - -
Ch.8 Ch.7 Ch.6 Ch.5
Ch.16 Ch.15 Ch.14 Ch.13
HH
Normal function
HL
Overload, Shorted Load or Overtemperature
LH
Open Load
LL
Shorted to Ground
Figure 1: Two bits per channel diagnostic feedback
function.
Overload, Short Circuit to Battery (SCB) or Overtemperature: HL is set when the current
limitation gets active, i.e. there is a overload, short to supply or overtemperature condition.
Open load: An open load condition is detected when the drain voltage decreases below 3 V
(typ.). LH bit combination is set.
V3.1
Page 14
26.Aug 2002