BTS50080-1EGA Datasheet, PDF (24/33 Pages) Infineon Technologies AG – Smart High-Side Power Switch PROFET™

Smart High-Side Power Switch
BTS50080-1EGA
Diagnostic Functions
Table 1 Truth Table
Operation Mode
Input (IN)
Level
Output Level
Diagnostic Output (IS)
DEN = H
DEN = L
Normal Operation (ON)
H
Inverse Operation (-I_L)
Short Circuit to GND
Over Temperature
Short Circuit to V_bb
Open Load
Protective switch-off resulting from
X
Short Circuit to GND or Over
Temperature ¹⁾
~V_bb
I_IS = I_L / k_ILIS
Z
>V_bb
Z
Z
I_IS(fault)
Z
I_IS(fault)
V_bb
I_IS<I_L/k_ILIS
~V_bb
Z
Z
I_IS(fault)
Z
Normal Operation (OFF)
L
Z
Z
Z
Inverse Operation (-I_L)
Short Circuit to GND
>V_bb
Z
I_IS(fault)
I_IS(fault)2), Z³⁾
Over Temperature
Short Circuit to V_bb
Open Load
>V_bb-V_DS(OL)
<V_bb-V_DS(OL)
>V_bb-V_DS(OL)
<V_bb-V_DS(OL)
I_IS(fault)
Z
I_IS(fault)
Z
L = Low Level, H = High Level, Z = high impedance, only leakage provided, potential depends on external circuit
1) Output and fault reporting remains latched until falling DEN edge acknowledge.
2) Before fault acknowledgement and latch reset.
3) After fault acknowledgement and latch reset.
7.2
Diagnosis during ON
During normal operation, an enabled IS pin provides a sense current, which is proportional to the load current as
long as V_b,IS>5V and as long as I_IS*R_IS<V_Z,IS. The ratio of the output current is defined as k_ILIS=I_L/I_IS. During switch-
on sense current is provided after a sense settling time t_sIS(ON). During inverse operation and switch-off no current
is provided.
The output sense current is limited to I_IS,lim. Please refer to Figure 21 for details.
Datasheet
24
V1.0, 2009-04-06