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TLE75242-ESH 数据表(PDF) 54 Page - Infineon Technologies AG |
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TLE75242-ESH 数据表(HTML) 54 Page - Infineon Technologies AG |
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54 / 83 page  Datasheet 54 Rev. 1.0 2017-11-23 TLE75242-ESH SPIDER+ 12V Diagnosis – If one channel is OFF when the diagnosis is performed, the corresponding DIAG_OLON.OUTn is set to “0B” • Diagnosis sequence for channels driven by the internal PWM Generators (see Chapter 7.5) – These channels are diagnosed only after all channels directly driven by micro-controller are checked – Channels mapped to PWM Generator 0 are diagnosed first –After a time tOLONSET the channel activation (switch ON) is the trigger event to perform Open Load at ON diagnosis for the first channel –After a time tONMAX + tOLONSW the diagnosis for the first channel is completed (DIAG_OLON.OUTn bit is updated) – The internal multiplexer is set to the next channel. After a time tOLONSW the diagnosis is completed (DIAG_OLON.OUTn bit is updated) for the currently selected channel. This step is repeated for all remaining PWM generator driven channels. If the channel is in OFF state during the PWM period, the internal logic waits for the ON state to perform the diagnosis. After a time tONMAX + tOLONSW the diagnosis for that channel is completed. – The minimum ON time for a reliable diagnosis is > tONMAX + tOLONSW. If the ON time is < tONMAX + tOLONSW the corresponding DIAG_OLON.OUTn is set to “0B”. When the loop finishes, DIAG_OLONEN.MUX bits are set back to 1111B (default value) and DIAG_OLON.OUTn bits store the last diagnosis loop result. It is necessary to start another diagnosis loop to update the register content. Figure 31 shows the timing in case of channels driven directly by micro-controller, while Figure 32 represents the case with channels driven by internal PWM Generators. Figure 31 Open Load at ON timings (diagnosis loop - channels driven by micro-controller directly) IL2 OpenLoadON_loop_ext_6ch.emf DIAG_OLONEN.MUX 1111 1010 t t tOLONSET DIAG_OLON.OUT2 0 t t tOLONSW DIAG_OLON.OUT3 t 1 IL3 1111 t DIAG_OLON.OUT7 t 0 IL7 Ch. 2 (ON) Ch. 3 (ON in Open Load) Ch. 7 (OFF) tOLONSW tOLONSW tOLONSW tOLONSW IL(OL) |
类似零件编号 - TLE75242-ESH |
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类似说明 - TLE75242-ESH |
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