TLE75620-EST datasheet(50/81 Pages) INFINEON

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Datasheet

Rev. 1.0

2017-11-23

TLE75620-EST

SPIDER+ 12V

Diagnosis

Figure 27 Output Status Monitor - concept (High-Side channels)

In Standard Diagnosis the bit OLOFF represents the OR combination of all DIAG_OSM.OUTn bits for all

channels in OFF state which have the corresponding current source IOLactivated.

9.3

Open Load at ON

Each auto-configurable channel (when used as high-side switch) and each high-side channel has the

possibility of Open Load at ON diagnosis, which can be controlled programming DIAG_OLONEN.MUX bits. By

default after a reset Open Load at ON diagnosis is not active. The device compares IL_Sn with IL(OL) and sets the

DIAG_OLON.OUTn accordingly:

• IL_Sn < IL(OL) → DIAG_OLON.OUTn = “1” if VOUTn_S > VOUT_S(OL)

9.3.1

Open Load at ON - direct channel diagnosis

When DIAG_OLONEN.MUX bits are programmed with a value corresponding to a channel (0000B → 0111B), the

internal multiplexer checks for Open Load at ON condition on the selected channel. It is recommended that

the channel is ON for at least tON before activating the diagnosis. After a time tOLONSET the corresponding

DIAG_OLON.OUTn bit for the selected channel is available. All the other bits in the DIAG_OLON register are

set to default (“0B”). The bits are updated every time the register is read.

When a channel is selected, the corresponding DIAG_OLON.OUTn bit content is mirrored also in the Standard

Diagnosis (bit OLON). In case of several register readouts in sequence the register content is updated at every

read request from micro-controller. See Figure 28 for further details.

OutStatMon_HS.emf

High-side

Channel

GND

VOUTn

VSn

OUTn

VDS

ROL

IOL

VOUT(OL)

DIAG_OSM.OUTn

VOUT > VOUT(OL)

DIAG_OSM.OUTn = „1"

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