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LNBH29 Datasheet(PDF) 2 Page - STMicroelectronics

Part # LNBH29
Description  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

LNBH29 Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
LNBH29
2/31
DocID023065 Rev 3
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
DiSEqC™ data encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2
LNBH29: data encoding by external DiSEqC envelope control
through the DSQIN pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3
LNBH29E: DISEQC data encoding by external 22 kHz signal
connected to the EXTM pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4
Output current limit selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5
Output voltage selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6
Diagnostic and protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7
Surge protection and TVS diodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.8
VMON: output voltage diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.9
PDO: overcurrent detection on output pull-down stage . . . . . . . . . . . . . . . 6
2.10
Power-on I²C interface reset and undervoltage lockout . . . . . . . . . . . . . . . 6
2.11
PNG: input voltage minimum detection . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.12
COMP: boost capacitors and inductor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.13
OLF: overcurrent and short-circuit protection and diagnostic . . . . . . . . . . . 7
2.14
OTF: thermal protection and diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
I²C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1
Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2
Start and stop condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.3
Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.4
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.5
Transmission without acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13


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