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LNBH24PPR Datasheet(PDF) 2 Page - STMicroelectronics

Part # LNBH24PPR
Description  Dual LNB supply and control IC with step-up and I짼C interface
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LNBH24PPR Datasheet(HTML) 2 Page - STMicroelectronics

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


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