TLE75620-EST datasheet(48/81 Pages) INFINEON

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Datasheet

Rev. 1.0

2017-11-23

TLE75620-EST

SPIDER+ 12V

Diagnosis

The SPI of TLE75620-EST provides diagnosis information about the device and the load status. Each channel

diagnosis information is independent from other channels. An error condition on one channel has no

influence on the diagnostic of other channels in the device (unless configured to work in parallel, see

Chapter 7.3 for more details).

9.1

Over Load and Over Temperature

When either an Over Load or an Over Temperature occurs on one channel, the diagnosis bit ERRn is set

accordingly. As described in Chapter 8.1 and Chapter 8.2, the channel latches OFF and must be reactivated

setting corresponding HWCR_OCL.OUTn bit to “1”.

9.2

Output Status Monitor

The device compares each channel VDS with VDS(OL) (auto-configurable channels used as Low-Side switches),

VOUT_S with VOUT_S(OL) (auto-configurable channels used as High-Side), VOUT with VOUT(OL) (High-Side channels)

and sets the corresponding DIAG_OSM.OUTn bits accordingly. The bits are updated every time DIAG_OSM

• VOUT_S > VOUT_S(OL) → DIAG_OSM.OUTn = “1” (auto-configurable channels as High-Side)

A diagnosis current IOL in parallel to the power switch can be enabled by programming the DIAG_IOL.OUTn

bit, which can be used for Open Load at OFF detection. Each channel has its dedicated diagnosis current

source. If the diagnosis current IOL is enabled or if the channel changes state (ON → OFF or OFF → ON) it is

necessary to wait a time tOSM for a reliable diagnosis. Enabling IOL current sources increases the current

consumption of the device. Even if an Open Load is detected, the channel is not latched OFF.

See Figure 24 for a timing overview (the values of DIAG_IOL.OUTn refer to a channel in normal operation

properly connected to the load).

Figure 24 Output Status Monitor timing

Output Status Monitor diagnostic is available when VS = VS(NOR) and VDD ≥ VDD(UV).

INn

OutStatMon_timings.emf

OUT.OUTn

tON + tOSM

DIAG_OSM.OUTn

SPI readout of

DIAG_OSM.OUTn

Output voltage

comparator

tOFF + tOSM

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