TLE75620-EST datasheet(52/81 Pages) INFINEON

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Datasheet

Rev. 1.0

2017-11-23

TLE75620-EST

SPIDER+ 12V

Diagnosis

– 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 29 shows the timing in case of channels driven directly by micro-controller, while Figure 30 represents

the case with channels driven by internal PWM Generators.

Figure 29 Open Load at ON timings (diagnosis loop - channels driven by micro-controller directly)

IL0

OpenLoadON_loop_ext_8ch.emf

DIAG_OLONEN.MUX

1111

1010

tOLONSET

DIAG_OLON.OUT0

tOLONSW

DIAG_OLON.OUT1

IL1

1111

DIAG_OLON.OUT7

IL7

Ch. 0

(ON)

Ch. 1 (ON in

Open Load)

Ch. 7 (OFF)

tOLONSW tOLONSW tOLONSW tOLONSW tOLONSW tOLONSW

IL(OL)

TLE75620-EST Datasheet(PDF) 52 Page - Infineon Technologies AG