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LNBH23QTR Datasheet(PDF) 2 Page - STMicroelectronics

Part # LNBH23QTR
Description  LNBs 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

LNBH23QTR Datasheet(HTML) 2 Page - STMicroelectronics

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Contents
LNBH23
2/32
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
DiSEqCTM data encoding and decoding . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2
DiSEqCTM 2.0 implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3
DiSEqCTM 1.X implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4
Data encoding by external tone generator (EXTM) . . . . . . . . . . . . . . . . . . 6
2.5
I²C interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.6
Output voltage selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.7
Diagnostic and protection functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.8
Output voltage diagnostic - VMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9
22 kHz tone diagnostic - TMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.10
Minimum output current diagnostic - IMON . . . . . . . . . . . . . . . . . . . . . . . . 7
2.11
Output current limit selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.12
Over-current and short circuit protection and diagnostic . . . . . . . . . . . . . . 8
2.13
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
LNBH23 software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.1
Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.2
System register (SR, 1 byte) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16


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