Data brief
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April 2010 Doc ID 15239 Rev 1 1/4
4
STEVAL-CBL004V1
Power supply demonstration board for LNB
based on the LNBH24
Features
■Complete interface between LNBs and I2C bus
■Built-in DC-DC converter for single 12 V supply
operation (8 - 15 volt Vin range) and high
efficiency (typ. 93%@0.5 A)
■Compliant with main satellite receiver output
voltage specifications
■Accurate 22 kHz tone generator supports
bidirectional DiSEqC™ 2.0 and meets widely
accepted standards (patent pending)
■Fast oscillator startup facilitates DiSEqC™
encoding
■Overload and overtemperature internal
protection with I2C diagnostic bits
■Output voltage and output current level
diagnostic feedback through I2C bits
■LNB short-circuit dynamic protection
■+/- 4 kV ESD tolerant on output power pins
■RoHS compliant
Description
The STEVAL-CBL004V1 demonstration board
implements a DC-DC converter based on the
LNBH24 dual LNB supply and control IC with
step-up and I2C interface.
This simple, cost-effective design represents an
integrated solution for supplying/interfacing two
independent LNB down-converters in satellite
antenna dishes. It provides good performance
with a minimum of external components.
The STEVAL-CBL004V1 includes all the functions
needed for the design of dual tuner STBs, with
supplying/interfacing functions that are compliant
with the international standards.
It features an I2C bus interface and, thanks to the
fully integrated step-up DC-DC converter, it works
with a single input voltage supply in the range of
8 V to 15 V.
STEVAL-CBL004V1
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Schematic diagram STEVAL-CBL004V1
2/4 Doc ID 15239 Rev 1
1 Schematic diagram
Figure 1. STEVAL-CBL004V1 circuit schematic
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STEVAL-CBL004V1 Revision history
Doc ID 15239 Rev 1 3/4
2 Revision history
Table 1. Document revision history
Date Revision Changes
26-Apr-2010 1 Initial release.
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STEVAL-CBL004V1
4/4 Doc ID 15239 Rev 1
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