Contents

LNBH25LS

2/30

DocID026753 Rev 3

Contents

1

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

2

Application information .................................................................. 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 protections 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, short-circuit protection and diagnostic.................. 9

2.12

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

3

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

4

Maximum ratings ........................................................................... 13

5

Typical application circuits........................................................... 14

6

I²C bus interface ............................................................................ 16

6.1

Data validity..................................................................................... 16

6.2

Start and stop condition .................................................................. 16

6.3

Byte format...................................................................................... 16

6.4

Acknowledge................................................................................... 16

6.5

Transmission without acknowledge................................................. 16

7

I²C interface protocol .................................................................... 18

7.1

Write mode transmission................................................................. 18

7.2

Read mode transmission ................................................................ 18

7.3

Data registers.................................................................................. 19

7.4

Status registers ............................................................................... 22

8

Electrical characteristics .............................................................. 23

9

Package information ..................................................................... 26

9.1

QFN24L (4x4 mm) package information ......................................... 27