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LNBH221 Datasheet(PDF) 4 Page - STMicroelectronics |
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LNBH221 Datasheet(HTML) 4 Page - STMicroelectronics |
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4 / 18 page  LNBH221 4/18 TYPICAL APPLICATION CIRCUITS FOR EACH SECTION : A and B APPLICATION CIRCUIT FOR DiSEqC 1.x AND OUTPUT CURRENT UP TO 500mA APPLICATION CIRCUIT FOR Bi-directional DiSEqC 2.0 AND OUTPUT CURRENT UP TO 500mA C8, D3 and D4 are needed to protect the output pins from any negative voltage spikes during high speed voltage transitions. (*): 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. (**) Do not leave these pins floating if not used. (***) To be soldered as close as possible to relative pins. LNBH221 Vup Gate Vin 12V L1=22µH Sense Vcc C5 10nF VoTX SDA SCL DSQIN Address C5 470nF GND 0<VADDR<VBYP Rsc 0.1 Ω Ω Ω Ω C3 470nF Ceramic D1 1N4001 C1 220µF C4 470nF Ceramic D2 BAT43 IC1 STN4NF03L IC2 C9 220µF C2 220µF Axial Ferrite Bead Filter F1 F1 suggested part number: MURATA BL01RN1-A62 Panasonic EXCELS A35 EXTM DSQOUT (**) DETIN VoRX to LNB Byp Tone Enable Set TTX=1 Section A and B LNBH221 Vup Gate Vin 12V L1=22µH Sense Vcc C5 10nF VoTX SDA SCL DSQIN Address C5 470nF GND 0<VADDR<VBYP Rsc 0.1 Ω Ω Ω Ω C3 470nF Ceramic D1 1N4001 C1 220µF C4 470nF Ceramic D2 BAT43 IC1 STN4NF03L IC2 STN4NF03L IC2 C9 220µF C9 220µF C2 220µF Axial Ferrite Bead Filter F1 F1 suggested part number: MURATA BL01RN1-A62 Panasonic EXCELS A35 EXTM DSQOUT (**) DETIN VoRX to LNB Byp Tone Enable Set TTX=1 Section A and B 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 SectionAandB STN4NF03L 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 SectionAandB STN4NF03L IC2 STN4NF03L IC2 |
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