LNBEH21PD STMICROELECTRONICS [STMicroelectronics], LNBEH21PD Datasheet - Page 4

• Manufacturer Part Number: LNBEH21PD
• Description: LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

LNBEH21
TYPICAL APPLICATION CIRCUITS
Figure 2: Application Circuit for DiSEqC 1.x and Output Current < 450 mA
Figure 3: Full Application Circuit for Bi-directional DiSEqC 2.0 and Output Current up to 750mA
(*) R-L Filter to be used according to EUTELSAT recommendation to implement the DiSEqC
If bidirectional DiSEqC
(**) 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.
4/22
12V
Axial Ferrite Bead Filter
F1 suggested part number:
Panasonic EXCELS-A35
Vin
Murata BL01RN1-A62
L1=22µH
12V
12V
Vin
Vin
L1=22µH
L1=22µH
D1
1N5821 or
STPS3L40A
Tone Enable /
Tone Enable /
Tone Enable /
13/18 Selection
13/18 Selection
13/18 Selection
Axial Ferrite Bead Filter
Axial Ferrite Bead Filter
F1
F1
MURATA BL01RN1-A62
MURATA BL01RN1-A62
Panasonic EXCELS A35
Panasonic EXCELS A35
Tone Enable /
Tone Enable /
Tone Enable /
13/18 Selection
13/18 Selection
13/18 Selection
suggested part number:
suggested part number:
IC2
IC2
TM
2.0 is not implemented the R-L filter can be removed and the above DiSEqC 1.x circuit can be used.
C2
C2
220µF
220µF
Rsc
0.05
STS4DNFS30L
STS4DNFS30L
C2
C2
C2
220µF
220µF
220µF
Rsc
Rsc
0.1
0.1
C1
220µF
F1
MOS
STN4NF03L
C1
C1
220µF
220µF
100µF
R1
R1
3.3K
3.3K
C9
R1
R1
3.3K
3.3K
F1
F1
I
100µF
100µF
2
C Bus
C9
C9
C4 (***)
470nF
Ceramic
C4
C4
470nF
470nF
Ceramic
Ceramic
C3(***)
470nF
Ceramic
(***)
(***)
{
Ceramic
Ceramic
C3
C3
470nF
470nF
IC1
(***)
(***)
SDA
TEN/VSEL
Vup
Gate
Sense
Vcc
SCL
16
16
18
18
12
12
13
13
14
14
19
19
17
17
IC1
IC1
SENSE
SENSE
TEN/VSEL
TEN/VSEL
SDA
SDA
VUP
VUP
GATE
GATE
VCC
VCC
SCL
SCL
LNBEH21
D2 1N4001
GND
GND
LNBEH21
LNBEH21
D2 1N4001
D2 1N4001
GND
GND
ADDRESS
(**) DETIN
DSQOUT
VoRX
EXTM
VoTX
ISEL
Byp
(**)
(**)
ADDRESS
ADDRESS
DSQOUT
DSQOUT
DETIN
DETIN
C7 (***)
100nF
C8 (***)
100nF
VoRX
VoRX
VoTX
VoTX
EXTM
EXTM
ISEL
ISEL
Byp
Byp
TM
15
15
3
3
9
9
8
8
5
5
2
2
4
4
7
7
C5 (***)
470nF
2.0, (see DiSEqC
C6
10nF
D3(***)
BAT43
C10
C10
10nF
10nF
0<V
0<V
D4 (***)
BAT43
(***)
(***)
ADDR
ADDR
C5(***)
C5(***)
470nF
470nF
(*) see note
<V
<V
270µH
15
Current Limit
Selection
D4
D4
BAT43
BAT43
BYP
BYP
0<V
0<V
Set TTX=1
Set TTX=1
(***)
(***)
TM
ADDR
ADDR
<V
<V
V>3.3V
(or floating)
implementation section).
to LNB
to LNB
BYP
BYP
Iout<750mA
Iout<450mA
to LNB