LNBH26S datasheet(31/35 Pages) STMICROELECTRONICS

31 / 35 page

Contents

Block diagram .....................................................................2

Application information (valid for each section A/B) ................................3

2.1

DISEQC™ data encoding (DSQIN pin) ............................................ 3

2.2

Data encoding by external 22 kHz tone TTL signal .................................. 3

2.3

Data encoding by external DiSEqC envelope control through the DSQIN pin............. 3

2.4

LPM (low power mode).......................................................... 4

2.5

DISEQC™ 2.0 implementation ................................................... 4

2.6

Output current limit selection ..................................................... 4

2.7

Output voltage selection......................................................... 5

2.8

Diagnostic and protection functions ............................................... 5

2.9

Surge protections and TVS diodes ................................................ 5

2.10

FLT: fault FLAG ................................................................ 5

2.11

VMON: output voltage diagnostic ................................................. 6

2.12

TMON: 22 kHz tone diagnostic ................................................... 6

2.13

TDET: 22 kHz tone detection ..................................................... 6

2.14

IMON: minimum output current diagnostic.......................................... 6

2.15

PDO: overcurrent detection on output pull-down stage ............................... 6

2.16

Power-on I²C interface reset and undervoltage lockout ............................... 6

2.17

PNG: input voltage minimum detection ............................................ 6

2.18

ISW: inductor switching current limit ............................................... 6

2.19

COMP: boost capacitors and inductor ............................................. 7

2.20

OLF: overcurrent and short-circuit protection and diagnostic .......................... 7

2.21

OTF: thermal protection and diagnostic ............................................ 7

Pin configuration ..................................................................8

Maximum ratings .................................................................10

Typical application circuits .......................................................11

I²C bus interface ..................................................................14

6.1

Data validity .................................................................. 14

6.2

Start and stop condition ........................................................ 14

LNBH26S

Contents

DS8975 - Rev 5

page 31/35

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