Data Sheet

17

Rev.3.3, 2010-02-15

TLE6240GP

Smart 16-Channel Low-Side Switch

Electrical and Functional Description of Blocks

5.4

Diagnostic Functions and FAULT-Pin

The device provides diagnosis information about the device and about the load. There are following diagnosis

flags implemented for each channel:

•

The diagnosis information of the protective functions, such as “over current” and “over temperature”

•

The open load diagnosis

•

The short to ground information.

For further details, refer to the Chapter “Control of the device”

FAULT - Fault pin. There is a general fault pin (open drain) which shows a high to low transition as soon as an

error occurs for any one of the sixteen channels. This fault indication can be used to generate a

µC interrupt.

Therefore a ‘diagnosis’ interrupt routine need only be called after this fault indication. This saves processor time

compared to a cyclic reading of the SO information.

As soon as a fault occurs, the fault information is latched into the diagnosis register. A new error will overwrite the

old error report. Serial data out pin (SO) is in a high impedance state when CS is high. If CS receives a LOW signal,

all diagnosis bits can be shifted out serially.

Electrical Characteristics: Diagnostic Functions

V

all voltages with respect to ground, positive current flowing into pin

Pos.

Parameter

Symbol

Limit Values

Unit

Conditions

Min.

Typ.

Max.

5.4.1

Open Load Detection Voltage

V

DS(OL)

V

V

–

5.4.2

Output Pull-down Current

I

PD(OL)

50

90

150

µA

V

5.4.3

Fault Delay Time

t

d(fault)

50

100

200

µs–

5.4.4

Short to Ground Detection Voltage

V

DS(SHG)

V

–

5.4.5

Short to Ground Detection Current

I

SHG

-50

-100

-150

µA

V

5.4.6

Overload Detection Threshold

I

D(lim) 1-8

11.3

2A

–

I

D(lim) 9-16

34

6A

–

5.4.7

Overtemperature Shutdown

1) Specified by design and not subject to production test.

T

th(sd)

170

–

200

°C–

5.4.8

Overtemperature Hysteresis1)

T

hys

–10

–K

–

5.4.9

FAULT Output Low Voltage

V

faultL

––

0.4

V

I