STEVAL-CBL014V1
Dual LNB supply and control IC DiSeqC 1.x compliant based on
the LNBH26L
Data brief
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•
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22 kHz tone waveform integrity guaranteed
also at no load
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
RoHS compliant
Description
This product evaluation board implements a DC-
DC converter based on the LNBH26L device
used to power LNB inside dish antennas which
receive satellite TV signals. The LNBH26L is an
integrated solution for supplying/interfacing
satellite LNB modules in accordance with
international standards, offering a complete
solution for dual-tuner satellite receivers and
good performance at low cost using few external
components. The LNBH26L evaluation board
2
includes an I C bus interface and the internal
22 kHz tone generator (factory trimmed) is
controlled by the DSQIN pin (TTL compatible),
permitting immediate DiSEqC™ data encoding. A
fully integrated step-up DC-DC converter allows
operation with a single input voltage supply
source ranging from 8 V to 16 V.
Features
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Complete interface between 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 using an
external resistor
Compliant with main satellite receiver output
voltage specifications (8 programmable
levels)
Accurate built-in 22 kHz tone generator suits
widely-accepted standards
January 2014
DocID025828 Rev 1
1/4
www.st.com
For further information contact your local STMicroelectronics sales
office
STEVAL-CBL014V1
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