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TLE8203E Datasheet(PDF) 9 Page - Infineon Technologies AG |
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TLE8203E Datasheet(HTML) 9 Page - Infineon Technologies AG |
9 / 33 page Final Data Sheet 9 Rev. 1.0, 2009-02-04 TLE 8203E Monitoring Functions 5 Monitoring Functions 5.1 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 VUV 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 VOV 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. 5.1.1 Characteristics Power Supply Monitoring 5.2 Temperature Monitoring Temperature sensors are integrated in the power stages. The temperature monitoring circuit compares the measured temperature to the warning and shutdown thresholds. If one or more temperature sensors reach the warning temperature, the temperature warning bit TW is set to HIGH. This bit is not latched (i.e. if the temperature falls below the warning threshold (with hysteresis), the TW bit is reset to LOW again). If one or more temperature sensors reach the shut-down temperature, the outputs are shut down as described in the next paragraph and the temperature shut-down bit TSD is set to HIGH. The shutdown is latched (i.e. the output stages remain off and the TSD bit set high until a SRR command is sent or a power-on reset is performed). If one or more temperature sensors reaches the shutdown threshold, all outputs are switched off. Electrical Characteristics: Power Supply Monitoring T j = -40 °C to +150 °C; INH = High; all outputs open, all voltages with respect to ground, positive current flowing into pin (unless otherwise specified) Pos. Parameter Symbol Limit Values Unit Conditions Min. Typ. Max. 5.1.1 UV-Switch-ON voltage V UVON –– 5.2 V V S increasing 5.1.2 UV-Switch-OFF voltage V UVOFF 4.0 – 5.0 V V S decreasing 5.1.3 UV-ON/OFF-Hysteresis V UVHY –0.25 – V V UVON - VUVOFF 5.1.4 OV-Switch-OFF voltage V OVOFF 21 – 25 V V S increasing 5.1.5 OV-Switch-ON voltage V OVON 20 – 24 V V S decreasing 5.1.6 OV-ON/OFF-Hysteresis V OVHY 0.5 1 – V V OVOFF - VOVON |
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