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LNBH21 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. LNBH21
Description  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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LNBH21 Datasheet(HTML) 4 Page - STMicroelectronics

 
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LNBH21
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TYPICAL APPLICATION CIRCUITS
Application Circuit for DiSEqC 1.x and Output Current < 450 mA
Full Application Circuit for Bi-directional DiSEqC 2.0 and Output Current up to 750mA
(*) 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.
(**) Do not leave these pins floating if not used.
(***) To be soldered as close as possible to relative pins.
-C8 and D3,4 are needed only to protect the output pins from any negative voltage spikes during high speed voltage transitions.
LNBH21
19
17
Vin
12V
L1=22µH
16
18
4
2
9
C8(***)
10nF
VoTX
SDA
SCL
15
DSQIN(**)
7
8
C5
470nF
GND
0<VADDR<VBYP
5
Rsc
0.1
C3(***)
470nF
Ceramic
D1 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D2(***)
BAT43
IC1
STS4DNFS30L
3
12
13
14
IC2
C2
220µF
C9
100µF
Ferrite Bead Filter
F1
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
EXTM
DSQOUT
(**) DETIN
VoRX
to LNB
ISEL
Byp
Tone Enable
Set TTX=1
SENSE
GATE
Vup
Address
LNBH21
19
17
Vin
12V
L1=22µH
16
18
4
2
9
C8(***)
10nF
VoTX
SDA
SCL
15
DSQIN(**)
7
8
C5
470nF
GND
0<VADDR<VBYP
5
Rsc
0.1
C3(***)
470nF
Ceramic
D1 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D2(***)
BAT43
IC1
STS4DNFS30L
3
12
13
14
IC2
C2
220µF
C2
220µF
C9
100µF
Ferrite Bead Filter
F1
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
EXTM
DSQOUT
(**) DETIN
VoRX
to LNB
ISEL
Byp
Tone Enable
Set TTX=1
SENSE
GATE
Vup
Address
22KHz Tone Enable
270µH
15 ohm
(*) see note
LNBH21
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
0.05Ω
C3(***)
470nF
Ceramic
D2 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D3(***)
BAT43
D1
1N5821 or
STPS3L40A
IC1
MOS
STN4NF03L
D4(***)
BAT43
C8(***)
100nF
ISEL
C2
220µF
C9
100µF
F1
Axial Ferrite Bead Filter
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
Higher current limit
Lower current limit
Floating or V>3.3V
GND
22KHz Tone Enable
270µH
15 ohm
(*) see note
LNBH21
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
0.05Ω
C3(***)
470nF
Ceramic
D2 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D3(***)
BAT43
D1
1N5821 or
STPS3L40A
IC1
MOS
STN4NF03L
D4(***)
BAT43
C8(***)
100nF
ISEL
C2
220µF
C9
100µF
F1
Axial Ferrite Bead Filter
F1 suggested part number:
MURATA BL01RN1-A62
Panasonic EXCELS A35
Higher current limit
Lower current limit
Floating or V>3.3V
GND
270µH
15 ohm
(*) see note
LNBH21
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
0.05Ω
C3(***)
470nF
Ceramic
D2 1N4001
C1
220µF
C4(***)
470nF
Ceramic
D3(***)
BAT43
D1
1N5821 or
STPS3L40A
IC1
MOS
STN4NF03L
D4(***)
BAT43
C8(***)
100nF
ISEL
C2
220µF
C2
220µF
C9
100µF
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
Higher current limit
Lower current limit
Floating or V>3.3V
GND


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