BTS5236-2GS Datasheet, PDF (18/27 Pages) Infineon Technologies AG – Smart High-Side Power Switch PROFET Two Channels, 50 mΩ

Smart High-Side Power Switch
BTS5236-2GS
4.3
Diagnosis
For diagnosis purpose, the BTS5236-2GS provides an Enhanced IntelliSense signal at
pins IS1 and IS2. This means in detail, the current sense signal I_IS, a proportional signal
to the load current (ratio k_ILIS = I_L / I_IS), is provided as long as no failure mode (see
Table 1) occurs. In case of a failure mode, the voltage V_IS(fault) is fed to the diagnosis pin.
S_OL
VBB
R_OL
IN1
R_IN1
R_lim
IS1
µC
SEN
R_SEN
IN2
R_IN2
R_lim
IS2
R_IS1 R_IS2
GND
I_IS1
gate control
0
1
latch over temperature
over load
0
open load @ off
1 V_IS(fault)
channel 1
V_{OUT( OL )}
gate control
0
1
diagnosis
I_IS2
channel 2
OUT1
OUT2
load
Figure 13 Block Diagram: Diagnosis
Sense.emf
Table 1
Truth Table¹⁾
Operation Mode
Input
Level
Normal Operation (OFF)
L
Short Circuit to GND
Over Temperature
Short Circuit to V_bb
Open Load
Output
Level
GND
GND
Z
V_bb
< V_OUT(OL)
> V_OUT(OL)
Diagnostic Output
SEN = H
SEN = L
Z
Z
Z
Z
Z
Z
V_IS = V_IS(fault)
Z
Z
Z
V_IS = V_IS(fault)
Z
Datasheet
18
V 1.1, 2007-09-07