Datasheet

TLE6288R
Description
Data Sheet 14 Rev. 2.4, 2007-08-08
4.3 Diagnostic
The TLE6288R has a parallel diagnosis via 6 output pind (DIAG1 - DIAG6) and a serial diagnosis functionallity via
SPI.
4.3.1 Parallel Diagnostic Functions
Parallel diagnostic pins (push-pull) change state according to the input signal of the corresponding channel. As
soon as an error occurs at the corresponding channel (overload and overtemperature is detected in on state and
open load/switch bypass in off state) the DIAG output shows the inverted input signal. An fault is detected only if
it lasts for longer than the fault filter time. The fault information is not latched in a register.
If DIAG6 is configured as Overtemperature Flag: This is a general fault pin which shows a high to low transition
as soon as an overtemperature error occurs for any one of the six channels (for longer than the fault filter time) or
the IC logic. This fault indication can be used to differ between overload and overtemperature errors in one of the
six channels or to detect a general IC overtemperature.
4.3.2 Electrical Characteristics: Diagnostic Functions
Electrical Characteristics: Diagnostic Functions
V
CC
= 4.5 V to 5.5 V, T
j
= -40 °C to +150 °C, V
B
= 6 V to 16 V, Reset = H, V
DO
= V
CC
, all voltages with respect to
ground, positive current flowing into pin (unless otherwise specified)
Pos. Parameter Symbol Limit Values Unit Pin/
Comment
Conditions
Min. Typ. Max.
4.3.1 Open Load Detection Voltage
V
DS(OL)
–5.5–V– lowside
configuration,
V
B
= 12 V
4.3.2 Open Load Detection Voltage
V
DS(OL)
–4.5–V– highside
configuration,
V
B
= 12 V
4.3.3 Output Open Load diagnosis
Current
I
d(OL)
-500 -100 -20 µA– V
B
= V
out
= 12
V
4.3.4 Fault Filter Time
t
f(fault)
50 100 200 µs– –
4.3.5 Switch Bypass Detection
Current
I
d(SB)
––250µA– –
4.3.6 Overload Detection Threshold
(Channel 1 to 3)
I
Dd(lim1-3)
4–6A– no regulation
mode
4.3.7 Overload / low inductance
load Detection time
(Channel 1 to 3)
t
li
––t
fo
µssee
Chapter 7.3
current
control mode
4.3.8 Overload Detection Threshold
(Channel 4 to 6)
I
Dd(lim 4-6)
3–6A– –