L9780 datasheet(48/56 Pages) STMICROELECTRONICS

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Electrical characteristics

L9780

48/56

DocID026356 Rev 3

Table 13. Diagnostic

Parameter

Conditions

Min.

Max.

Unit

Heater diagnostic

HD diagnostic current

Source current, HD = 3 V

160

220

μA

HD diagnostic current

Sink current, HD = 3 V

μA

HG pin voltage threshold for on

state of Heater FET

If HG voltage > specified value, Heater

FET is considered on

3.88

4.12

Heater short to ground threshold

(HSG)

0.715

0.76

VCCA

Heater short to battery threshold

Bit STBHTH = 0

225

275

Bit STBHTH = 1

400

450

Heater open circuit threshold

HSG-0.45

HSG-0.01

INRC, SR, SNS diagnostic

INRC short to ground threshold

175

225

SNS short to ground threshold

SNS_PTH: positive threshold

175

225

SNS_NTH: negative threshold

-250

-150

Sensor short to battery threshold

STBS1: SR pin

175

225

STBS2: INRC pin

0.62

0.66

VCCA

STBS3: SNS pin

2.6

2.8

Table 14. Leakage currents

Parameter

Conditions

Min.

Max.

Unit

Short to battery compatible pins

HD leakage current

HD voltage = 53 V

150

μA

SR + INRC sum of leakage

currents

Applied voltage on pins under test = 0 V,

19 V, T = 150 °

INRC + SR + SNS + TG1 + TG2

+ OUT1 + OUT2 sum of leakage

currents

Applied voltage on pins under test = 0 V,

19 V, 40 V, T = 150 °C

RCT1 + RCT2 sum of leakage

currents

Applied voltage on pins under test = 0 V,

19 V, T = 150 °C

-3

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