LNBH24 datasheet(21/30 Pages) STMICROELECTRONICS

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LNBH24

Electrical characteristics

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NB: if the output voltage is lower than the min. value the VMON I²C bit is set to 1.

When VSEL=0: If VMON=0 then VO>85% of VO typ.; If VMON=1 then VO<95% of VO typ.

When VSEL=1: If VMON=0 then VO>84% of VO typ.; If VMON=1 then VO<96% of VO typ.

NB: 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.

Table 10.

Address pins characteristics (TJ from 0 to 85 °C, VI = 12 V)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Section “A” address selection

VADDR-A1

"0001000(R/W)" Address pin

voltage range for section A

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

00.8

VADDR-A2

"0001001(RW)" Address pin

voltage range for section A

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

Section “B” address selection

VADDR-B1

"0001010(R/W)" Address pin

voltage range for section B

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

00.8

VADDR-B2

"0001011(RW)" Address pin

voltage range for section B

R/W bit determines the transmission

mode: read (R/W=1) write (R/W=0)

Table 11.

Output voltage diagnostic (VMON bit) characteristics of sections A/B

(refer to the typical application circuit in Figure 4, TJ from 0 to 85 °C, EN=1,

VSEL=LLC=TEN=PCL=ITEST=TTX=AUX=0, RSEL = 11 kΩ, DSQIN=LOW, VI=12 V, IO = 50

mA, unless otherwise stated. Typical values are referred to TJ = 25 °C. VO=VoRX pin voltage.

See software description section for I²C access to the system register)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

VTH-L

Diagnostic low threshold at

VO=13.4V typ.

EN=1, VSEL=0

LLC=0

VTH-L

Diagnostic low threshold at

VO=18.5V typ.

EN=VSEL=1

LLC=0

Table 12.

Minimum output current diagnostic (IMON bit) characteristics of sections A/B

(refer to the typical application circuit in Figure 4, TJ from 0 to 85 °C, EN=1,

VSEL=LLC=TEN=PCL=TTX=0, DSQIN=LOW, RSEL = 11 kΩ, VI = 12 V, IO = 50 mA, unless

otherwise stated. Typical values are referred to TJ = 25 °C. VO=VoRX pin voltage. See

software description section for I²C access to the system register)

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

ITH

Minimum current diagnostic

threshold

ITEST=1, AUX=0/1

ITEST=0, AUX=0/1

2.5

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