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LNBH221 Datasheet(PDF) 8 Page - STMicroelectronics

Part # LNBH221
Description  Dual LNB supply and control IC with Step-Up converter and I2C interface
PDF  27 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LNBH221 Datasheet(HTML) 8 Page - STMicroelectronics

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Typical application circuits for each section: A and B
LNBH221
8/27
1.
C8, D3 and D4 are needed to protect the output pins from any negative voltage spikes during high speed
voltage transitions.
2.
(*): R-L filter to be used according to EUTELSAT recommendation to implement the DiSEqCTM 2.0, (see
DiSEqCTM implementation on page 8). If bidirectional DiSEqCTM 2.0 is not implemented it can be removed
both with C8 and D4.
3.
(**) Do not leave these pins floating if not used.
4.
(***) To be soldered as close as possible to relative pins
Figure 4.
Application Circuit For Bi-directional Diseqc 2.0 And Output Current Up To 500mA
22KHz Tone Enable
270µH
15 ohm
(*) see note
LNBH221
Vup
Gate
Vin
12V
L1=22µH
Sense
Vcc
VoRX
VoTX
(**) DETIN
C7(***)
100nF
to LNB
SDA
SCL
DSQOUT
DSQIN (**)
ADDRESS
Byp
C5
470nF
GND
0<VADDR<VBYP
EXTM
C6
10nF
Rsc
0.1
Ω
Ω
Ω
Ω
C3(***)
470nF
Ceramic
D2 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D3(***)
BAT43
IC1
D4(***)
BAT43
C8(***)
100nF
C9
220µF
C2
220µF
F1
Axial Ferrite Bead Filter
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
Section A and B
STS4DNFS30L
IC2
22KHz Tone Enable
270µH
15 ohm
(*) see note
LNBH221
Vup
Gate
Vin
12V
L1=22µH
Sense
Vcc
VoRX
VoTX
(**) DETIN
C7(***)
100nF
to LNB
SDA
SCL
DSQOUT
DSQIN (**)
ADDRESS
Byp
C5
470nF
GND
0<VADDR<VBYP
0<VADDR<VBYP
EXTM
C6
10nF
Rsc
0.1
Ω
Ω
Ω
Ω
C3(***)
470nF
Ceramic
D2 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D3(***)
BAT43
IC1
D4(***)
BAT43
C8(***)
100nF
C9
220µF
C9
220µF
C2
220µF
F1
Axial Ferrite Bead Filter
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
Axial Ferrite Bead Filter
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
Section A and B
STS4DNFS30L
IC2
STS4DNFS30L
IC2



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