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LNBEH21PD Datasheet(PDF) 4 Page - STMicroelectronics |
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LNBEH21PD Datasheet(HTML) 4 Page - STMicroelectronics |
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4 / 22 page  LNBEH21 4/22 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 DiSEqCTM 2.0, (see DiSEqCTM implementation section). If bidirectional DiSEqCTM 2.0 is not implemented the R-L filter can be removed and the above DiSEqC 1.x circuit can be used. (**) 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. LNBEH21 Vin 12V L1=22µH C10(***) 10nF VoTX SDA SCL C5(***) 470nF GND 0<VADDR<VBYP Rsc 0.1 Ω Ω Ω Ω C3 (***) 470nF Ceramic D2 1N4001 C1 220µF C4 (***) 470nF Ceramic D4(***) BAT43 IC1 STS4DNFS30L IC2 C2 220µF C9 100µF Axial Ferrite Bead Filter F1 F1 suggested part number: MURATA BL01RN1-A62 Panasonic EXCELS A35 EXTM DSQOUT (**) DETIN VoRX to LNB ISEL Byp Set TTX=1 Tone Enable / 13/18 Selection R1 3.3K Ω Ω Ω Ω ADDRESS VUP VCC GATE SENSE TEN/VSEL 19 17 16 18 12 13 14 15 7 5 8 9 4 2 3 LNBEH21 Vin 12V L1=22µH C10(***) 10nF VoTX SDA SCL C5(***) 470nF GND 0<VADDR<VBYP Rsc 0.1 Ω Ω Ω Ω C3 (***) 470nF Ceramic D2 1N4001 C1 220µF C4 (***) 470nF Ceramic D4(***) BAT43 IC1 STS4DNFS30L IC2 C2 220µF C2 220µF C9 100µF Axial Ferrite Bead Filter F1 F1 suggested part number: MURATA BL01RN1-A62 Panasonic EXCELS A35 EXTM DSQOUT (**) DETIN VoRX to LNB ISEL Byp Set TTX=1 Tone Enable / 13/18 Selection Tone Enable / 13/18 Selection R1 3.3K Ω Ω Ω Ω ADDRESS VUP VCC GATE SENSE TEN/VSEL 19 17 16 18 12 13 14 15 7 5 8 9 4 2 3 I2C Bus { 270µH 15 Ω Ω Ω Ω LNBEH21 Vup Gate Vin 12V L1=22µH Sense Vcc VoRX VoTX (**) DETIN C7 (***) 100nF to LNB SDA SCL DSQOUT TEN/VSEL ADDRESS Byp C5 (***) 470nF 0<VADDR <V BYP 0<VADDR <V BYP EXTM C6 10nF Rsc 0.05 Ω Ω Ω Ω GND GND 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 Iout<750mA Iout<450mA V>3.3V (or floating) Axial Ferrite Bead Filter F1 suggested part number: Murata BL01RN1-A62 Panasonic EXCELS-A35 (*) see note Current Limit Selection Tone Enable / 13/18 Selection R1 3.3K Ω Ω Ω Ω Tone Enable / 13/18 Selection Tone Enable / 13/18 Selection R1 3.3K Ω Ω Ω Ω |
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