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LNBH24 Datasheet

  • LNBH24

  • STMicroelectronics [Dual LNB supply and control IC with ste...

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LNBH24
Dual LNB supply and control IC with step-up and I
2
C interface
Features
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Complete interface between LNBS and I虏C bus
Built-in DC-DC converter for single 12 V supply
operation and high efficiency (typ. 93%@0.5 A)
Selectable output current limit through external
resistor
Compliant with main satellite receivers output
voltage specification
New accurate built-in 22 kHz tone generator
meets widely accepted standards (patent
pending)
Fast oscillator start-up facilitates DiSEqC
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encoding
Built-in 22 kHz tone detector supports bi-
directional DiSEqC
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2.0
Very low-drop post regulator and high
efficiency step-up PWM with integrated power
N-MOS allow low power losses
Two output pins suitable for bypassing the
output R-L filter and avoiding tone distortion (R-
L filter as per DiSEqC
鈩?/div>
2.0 specs, see typ.
application circuits)
Overload and over-temperature internal
protections with I虏C diagnostic bits
Output voltage and output current level
diagnostic feedback by I虏C bits
LNB short circuit dynamic protection
+/- 4 kV ESD tolerant on output power pins
PowerSSO-36 (ePad)
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鈻?/div>
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monolithic voltage regulator and interface IC,
assembled in PowerSSO-36 ePad, specifically
designed to provide the 13/18 V power supply and
the 22 kHz tone signalling for two independent
LNB down-converters in the antenna dishes
and/or multi-switch box. In this application field, it
offers a dual tuner STBs with extremely low
component count, low power dissipation together
with simple design and I
2
C standard interfacing.
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Description
Intended for analog and digital DUAL Satellite
receivers/Sat-TV, sat-PC cards, the LNBH24 is a
Table 1.
Device summary
Order code
LNBH24PPR
Package
PowerSSO-36 (Exposed pad)
Packaging
Tape and reel
February 2008
Rev 1
1/30
www.st.com
30

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