LNBH25S datasheet(31/37 Pages) STMICROELECTRONICS

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LNBH25S

Electrical characteristics

DocID026736 Rev 2

31/37

Refer to Section 5: "Typical application circuits", TJ from 0 to 85 °C, all dat 1..4 register bits

set to “0”, RSEL = 11.5 kΩ, DSQIN = low, V

IN = 12 V, IOUT = 50 mA, unless otherwise

stated. Typical values are referred to TJ = 25 °C. VOUT = VOUT pin voltage. See Section 6:

"I²C bus interface" and Section 7: "I²C interface protocol".

Table 17: Output voltage diagnostic (VMON bit, status 1 register) characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

VTH-L

Diagnostic low threshold

at VOUT = 13.0 V

VSEL1 =1, VSEL2 =

VSEL3 = VSEL4 = 0

VTH-L

Diagnostic low threshold

at VOUT = 18.15 V

VSEL4 =1, VSEL1 =

VSEL2 = VSEL3 = 0

If the output voltage is lower than the min. value, the VMON I²C bit is set to 1.

If VMON=0 then VOUT > 80% of VOUT typical

If VMON=1 then VOUT < 95% of VOUT typical

Refer to Section 5: "Typical application circuits", TJ from 0 to 85 °C, RSEL = 11.5 kΩ,

DSQIN = low, VIN = 12 V, unless otherwise stated. Typical values are referred to TJ = 25

°C. VOUT = VOUT pin voltage. See Section 6: "I²C bus interface" and Section 7: "I²C

interface protocol".

Table 18: Output current diagnostic (IMON bit, status 2 register) characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

ITH

Minimum current

diagnostic

threshold

EN_IMON = 1 (VOUT is set

to 21 V typ.)

If the output current is lower than the min. threshold limit, the IMON I²C bit is set to

1. If the output current is higher than the max. threshold limit, the IMON I²C bit is

set to 0.

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