STEVAL-CBL005V1
LNB power supply demonstration board based on the LNBH23
Data brief
Features
■
Integrated DC-DC converter
■
Single input supply voltage: from 8 V to 15 V
■
I2C™ bus interface for the IC control and
diagnostics
■
Integrated 22 kHz tone generator, factorytrimmed in accordance with widely accepted
standards
■
User-friendly graphical user interface ("LNBxxx
control suite") software included in the kit
■
Implements the LNBH23 in a QFN32 package
Description
STEVAL-CBL005V1
The STEVAL-CBL005V1 LNB power supply
demonstration board implements a DC-DC
converter based on the LNBH23 device. The
LNBH23 is an LNB supply and control IC with
step-up and an I2C interface. It is used to power
an LNB on a dish antenna for reception of satellite
TV signals.
The LNBH23 is an integrated solution for
supplying/interfacing satellite LNB modules in
accordance with international standards.
This solution is simple, inexpensive, shows very
good performance and has a low external
component count.
The LNBH23 demonstration board includes an
I2C™ bus interface and an internal 22 kHz tone
generator that is factory-trimmed to comply with
widely accepted standards, and can be controlled
through the DSQIN pin (TTL compatible). This
allows immediate DiSEqC™ data encoding.
Due to the fully integrated step-up DC-DC
converter, it works with a single input voltage
supply source ranging from 8 V to 15 V.
April 2009
Doc ID 15562 Rev 1
For further information contact your local STMicroelectronics sales office.
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Doc ID 15562 Rev 1
TP
Vup
C6
0.47µF
C4
0.47µF
LX
TTX
EXTM
SDA
DSQIN
ADDR
DSQOUT
SCL
13/18 (VCTRL)
Vup
P-GND
100µF
C3
L1
22µH
VoRX
VoTX
C8
0.22µF
L3
220µH
C9
10µF
D3
1N4007
R3
10Kohm
C12
10nF
D2 R4 15Ohm
BAT43
C11
0.22µF
C10
0.22µF
D4
BAT43
11K=0.75A Iout
ISEL
DETIN
BY-PASS
Vcc-L
R1
100
R2
(RSEL)
A-GND
LNBH23
Vcc
C7
0.1µF
+12V
Driver & Logic
TVS
Output (VoRx)
Figure 1.
D1
STPS2L30A
C1
100µF
C2
0.1µF
1
C5
100µF
L2
Ferrite
Bead
+12V
Power
Circuit schematic
STEVAL-CBL005V1
Circuit schematic
Schematic diagram
STEVAL-CBL005V1
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
06-Apr-2009
1
Changes
Initial release.
Doc ID 15562 Rev 1
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STEVAL-CBL005V1
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