TLE8201R Datasheet, PDF (11/45 Pages) Infineon Technologies AG – Door Module Power IC

TLE 8201R
4.2
Monitoring Functions
4.2.1 Power Supply Monitoring
The power supply Voltage V_S is monitored for over- and under voltage.
• Under Voltage
If the supply voltage V_S drops below the switch off voltage V_{UV OFF}, all output
transistors are switched off and the power supply fail bit PSF is set. The error is not
latched, i.e. if V_S rises again and reaches the switch on voltage V_{UV ON}, the power
stages are restarted and the error bit is reset.
• Over Voltage
If the supply voltage V_S rises above the switch off voltage V_{OV OFF}, all output
transistors are switched off and the power supply fail bit (bit 7 of the SPI diagnosis
word) is set. The error is not latched, i.e. if V_S falls again and reaches the switch on
voltage V_{OV ON}, the power stages are restarted and the error is reset.
4.2.1.1 Characteristics Power Supply Monitoring
Electrical Characteristics
8 V < V_S < 20 V; 4.75 V < V_CC < 5.25 V; INH = High; all outputs open;
-40 °C < T_j < 150 °C; unless otherwise specified
Pos. Parameter
Sym- Limit Values Unit
bol _{min. typ. max.}
Conditions
4.2.1
4.2.2
4.2.3
4.2.4
UV-Switch-ON voltage
UV-Switch-OFF voltage
UV-ON/OFF-Hysteresis
OV-Switch-OFF voltage
4.2.5 OV-Switch-ON voltage
4.2.6 OV-ON/OFF-Hysteresis
V_UVON –
–
5.2 V
V_UVOFF 4.0 –
5.0 V
V_UVHY –
0.25 –
V
V_OVOF 21
–
25 V
F
V_OVON 20
–
24 V
V_OVHY 0.5 1
–
V
V_S increasing
V_S decreasing
V_UVON - V_UVOFF
V_S increasing
V_S decreasing
V_OVOFF -
V_OVON
Data Sheet Rev. 2.0
11
2006-06-07