BTS5231GS Datasheet, PDF (18/28 Pages) Infineon Technologies AG – Smart High-Side Power Switch PROFET Two Channels, 140 mΩ

Smart High-Side Power Switch
BTS 5231GS
Diagnosis
4.3
Diagnosis
For diagnosis purpose, the BTS 5231GS 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, 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 Table ¹⁾
Operation Mode
Input
Level
Normal Operation (OFF)
Short Circuit to GND
Over-Temperature
Short Circuit to V_bb
Open Load
L
(OFF-State)
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
Data Sheet
18
V1.0, 2005-12-19