LNBH24 STMicroelectronics, LNBH24 Datasheet - Page 2

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LNBH24

Manufacturer Part Number
LNBH24
Description
Dual LNB supply and control IC with step-up and I2C interface
Manufacturer
STMicroelectronics
Datasheet

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Contents
1
2
3
4
5
6
7
2/30
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
I²C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1
6.2
6.3
6.4
6.5
LNBH24 software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DiSEqC™ data encoding and decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DiSEqC™ 2.0 implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
DiSEqC™ 1.X implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Data encoding through external tone generator (EXTM) . . . . . . . . . . . . . . 6
I²C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Output voltage selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Diagnostic and protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Output voltage diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
22 kHz tone diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Minimum output current diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Output current limit selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Over-current and short-circuit protection and diagnostic . . . . . . . . . . . . . . 8
Thermal protection and diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Start and stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Transmission without acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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