STEVAL-CBL011V1 DiSEqC 1.X-compliant dual LNB supply and control IC based... the LNBH26 Features

STEVAL-CBL011V1 DiSEqC 1.X-compliant dual LNB supply and control IC  based... the LNBH26 Features
STEVAL-CBL011V1
DiSEqC 1.X-compliant dual LNB supply and control IC based on
the LNBH26
Data brief
Features
■
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 by external
resistor
■
Compliant with main satellite receiver output
voltage specification (15 programmable levels)
■
Accurate built-in 22 kHz tone generator
compliant with widely accepted standards
■
22 kHz tone waveform integrity guaranteed
also in no load condition
■
Low drop post regulator and high efficiency
step-up PWM with integrated power N-MOS for
low power loss
■
LPM (low power mode) function to reduce
dissipation
■
Overload and overtemperature internal
protection with I2C diagnostic bits
■
LNB short-circuit dynamic protection
■
RoHS compliant
The LNBH26 demonstration board includes an
I2C bus interface and a factory-trimmed internal
22 kHz tone generator which can be controlled
through the DSQIN pin (TTL compatible). This
allows immediate DiSEqC™ data encoding.
Thanks to a fully integrated step-up DC-DC
converter, the STEVAL-CBL011V1 demonstration
board can operate with a single input voltage
supply source, ranging from 8 to 15 V.
Description
The STEVAL-CBL011V1 demonstration board
implements a DC-DC converter based on ST’s
LNBH26 device. It is used to power LNBs in dish
antennas to receive satellite TV signals.
The LNBH26 is an integrated solution for
supplying/interfacing satellite LNB modules in
accordance with international standards.
This single device offers a complete solution for
dual-tuner satellite receivers and provides good
performance at low cost using a low external
component count.
February 2013
Doc ID 024061 Rev 1
For further information contact your local STMicroelectronics sales office.
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www.st.com
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Schematic diagram
STEVAL-CBL011V1
1
Schematic diagram
Figure 1.
STEVAL-CBL011V1 circuit schematic
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Revision history
Revision history
Table 1.
Document revision history
Date
Revision
11-Feb-2013
1
Changes
Initial release.
Doc ID 024061 Rev 1
3/4
STEVAL-CBL011V1
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