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STMicroelectronics Electronic Components Datasheet

LNBH26LS Datasheet

Dual LNBS supply and control IC

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LNBH26LS
Dual LNBS supply and control IC with step-up and I²C interface
Datasheet - production data
Features
Complete interface between then LNB and
I²C bus
Built-in DC-DC converter for single 12 V
supply operation and high efficiency (typ.
93% @ 0.5 A)
Selectable output current limit by external
resistor
Compliant with main satellite receiver output
voltage specification (8 programmable
levels)
Accurate built-in 22 kHz tone generator suits
widely accepted standards
22 kHz tone waveform integrity guaranteed
also at no load condition
Low drop post regulator and high efficiency
step-up PWM with integrated power N-MOS
allowing low power losses
Overload and overtemperature internal
protection with I²C diagnostic bits
LNB short-circuit dynamic protection
+/- 4 kV ESD tolerant on output power pins
Applications
STB satellite receivers
TV satellite receivers
PC card satellite receivers
Description
Intended for analog and digital DUAL satellite
receiver/Sat-TV, Sat-PC cards, the LNBH26LS is
a monolithic voltage regulator and IC interface,
assembled in QFN24 (4x4) specifically designed
to provide the 13/18 V power supply and the 22
kHz tone signaling to the LNB down-converter in
the antenna dishes or to the multi-switch box. In
this application field, it offers a complete solution
for dual tuner satellite receivers with extremely
low component count, low power dissipation
together with simple design and I²C standard
interfacing.
Table 1: Device summary
Order code
LNBH26LSPQR
Package
QFN24 (4x4)
Packaging
Tape and reel
December 2013
DocID025504 Rev 1
This is information on a product in full production.
1/33
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STMicroelectronics Electronic Components Datasheet

LNBH26LS Datasheet

Dual LNBS supply and control IC

No Preview Available !

Contents
Contents
LNBH26LS
1 Block diagram.................................................................................. 6
2 Application information (valid for each section A/B).................... 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 protection and TVS diodes ..................................................... 9
2.8 Power-on I²C interface reset and undervoltage lockout .................... 9
2.9
2.10
2.11
PNG: input voltage minimum detection ............................................. 9
COMP: boost capacitors and inductor............................................... 9
OLF: overcurrent and short-circuit protection and diagnostic .......... 10
2.12 OTF: thermal protection and diagnostic .......................................... 10
3 Pin configuration ........................................................................... 11
4 Maximum ratings ........................................................................... 14
5 Typical application circuits........................................................... 15
6 I²C bus interface ............................................................................ 17
6.1 Data validity..................................................................................... 17
6.2 Start and stop condition .................................................................. 17
6.3 Byte format...................................................................................... 17
6.4 Acknowledge................................................................................... 17
6.5 Transmission without acknowledge................................................. 17
7 I²C interface protocol .................................................................... 19
7.1 Write mode transmission................................................................. 19
7.2 Read mode transmission ................................................................ 20
7.3 Data registers.................................................................................. 21
7.4 Status registers ............................................................................... 23
8 Electrical characteristics .............................................................. 25
8.1 Output voltage selection.................................................................. 26
9 Package mechanical data ............................................................. 28
2/33 DocID025504 Rev 1


Part Number LNBH26LS
Description Dual LNBS supply and control IC
Maker STMicroelectronics
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LNBH26LS Datasheet PDF






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