Contents

LNBH26LS

2/33

DocID025504 Rev 1

Contents

1

Block diagram.................................................................................. 6

2

Application information (valid for each section A/B).................... 7

2.1

DISEQC™ data encoding (DSQIN pin)............................................. 7

2.2

Data encoding by external 22 kHz tone TTL signal........................... 7

2.3

Data encoding by external DiSEqC envelope control through the

DSQIN pin...................................................................................................... 8

2.4

Output current limit selection............................................................. 8

2.5

Output voltage selection.................................................................... 8

2.6

Diagnostic and protection functions .................................................. 8

2.7

Surge protection and TVS diodes ..................................................... 9

2.8

Power-on I²C interface reset and undervoltage lockout .................... 9

2.9

PNG: input voltage minimum detection ............................................. 9

2.10

COMP: boost capacitors and inductor............................................... 9

2.11

OLF: overcurrent and short-circuit protection and diagnostic .......... 10

2.12

OTF: thermal protection and diagnostic .......................................... 10

3

Pin configuration ........................................................................... 11

4

Maximum ratings ........................................................................... 14

5

Typical application circuits........................................................... 15

6

I²C bus interface ............................................................................ 17

6.1

Data validity..................................................................................... 17

6.2

Start and stop condition .................................................................. 17

6.3

Byte format...................................................................................... 17

6.4

Acknowledge................................................................................... 17

6.5

Transmission without acknowledge................................................. 17

7

I²C interface protocol .................................................................... 19

7.1

Write mode transmission................................................................. 19

7.2

Read mode transmission ................................................................ 20

7.3

Data registers.................................................................................. 21

7.4

Status registers ............................................................................... 23

8

Electrical characteristics .............................................................. 25

8.1

Output voltage selection.................................................................. 26

9

Package mechanical data ............................................................. 28