CT Sinyal Şartlandırıcı Tasarımı

flux

0:45

Consult.

Ekran goruntusune gore genel yerlesim dogru yonde (sol: J1/R_BURDEN, sag: J2), ama kablolama (airwire) uzunluklari ve izolasyon bariyeri etrafinda “blok” sirasi karismis. Asagidaki tasimalar, hem daha temiz routing hem de izolasyon kurallarina uyum icin en hizli iyilestirme olur:
1) Izolasyon bariyerini ortala ve yan yana yap
  • U3 ile U_DCDC’yi kartin tam ortasinda, birbirine cok yakin ve dikey slotu kopruleyecek sekilde yan yana konumlandirin.
  • Hedef: U3’nin sol pinleri “primary”, sag pinleri “secondary” tarafinda kalsin; U_DCDC icin de aynisi.
  • Su an ikisi ortada ama aralari ve baglantilari daginik; ortadaki airwire “yelpazesi” bu yuzden buyuyor.
2) Primary zinciri solda tek blok haline getir
Sol tarafta sira su olmali (soldan saga):
  • Giris: J1 -> yuk: R_BURDEN (zaten yakin, guzel)
  • Dogrultucu blogu: U1 + etrafinda D1, D2, R1, R2, R3, R4
    • Su an D1/R1/R3/R4 biraz “ortaya” kacmis gorunuyor; hepsini U1’in hemen yanina toplayin.
  • Filtre blogu: R5 + C1 + R6 + C2
    • Su an C1 ortanin ustunde “yalniz” kalmis; R5 ve R6 ile ayni bloga alin (primary tarafta, U2’ye dogru akan bir hat).
  • LED surucu: U2 + R7 + R8
    • Bu ucunu, U3’nin primary tarafina en yakin olacak sekilde yerlestirin (R7/R8 airwire kisalir).
3) Secondary zinciri sagda tek blok haline getir
  • U4’u U3’nin secondary pinlerine yakin koyun; R9 da U3 ile U4 arasina gelsin.
  • Kazanc/ayar blogu: Rg, Rf, RV1 U4’un yaninda, birbirine yakin olmali.
    • Su an RV1 fena degil ama Rf/Rg ile “ucgen” daha sikistirilabilir.
  • Cikis/koruma: Rs, D3, C7 tam J2’nin soluna alin (en sagda J2 olsun).
4) Dekuplajlari dogru IC’lere yapistir
Bu, routing’i dramatik kisaltir:
5) Test point’leri ilgili blogun yanina koy
  • TP1 R_BURDEN cikisinda (primary, yuksek akim bolgesi)
  • TP2 D1/D2 katot birlesiminde (dogrultucu cikisi)
  • TP3 C2 dugumunde (filtre cikisi)
  • TP4 U4 TIA cikisinda (secondary)
  • TP5 J2 oncesinde (ADC_OUT)
Isterseniz bir sonraki ekran goruntusunde bana sadece su 2 seyi gosterin:
  • Izolasyon slotunu cizdiniz mi (X~60 mm’de)?
  • U3 ve U_DCDC slotu kopruleyecek sekilde ortalandi mi?
Ondan sonra yerlesimin “son dokunus”unu (hangi parca 2-5 mm kaydirilmali / hangi yone cevrilmeli) daha nokta atisi soylerim.
C9 yerleşimini sor
C9 değeri ve netleri
U4-C9 dekuplaj önerisi
Bariyer için clearance
DRC ile kontrol
41 days
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U4 VINB- - Rg P1
J2 PIN2 - U4 VSS
U4 VINB- - Rg P1
Rs P2 - C7 P1
Rf P2 - RV1 1
Rf P2 - RV1 1
R6 P2 - C2 P1
R6 P2 - C2 P1
J3 PIN1 - U1 V+
R8 P2 - U2 -IN1
RV1 2 - U4 VOUTB
J3 PIN2 - U1 V-
R5 P2 - C1 P1
R5 P2 - C1 P1
J2 PIN2 - U4 VSS
U3 PD1CAT - R8 P1
J3 PIN2 - U1 V-
R5 P2 - C1 P1
U2 OUT1 - R7 P1
J3 PIN2 - U1 V-
U1 OUT2 - R4 P1
J3 PIN1 - U1 V+
U4 VINB- - Rg P1
R2 P2 - U1 -IN2
R7 P2 - U3 LAN
J3 PIN2 - U1 V-
D1 K - D2 K
R6
Resistance
10kΩ ohms
C7
Capacitance
100nF
Rg
Resistance
10kΩ ohms
C3
Capacitance
100nF
Rf
Resistance
6.8kΩ ohms
R5
Resistance
10kΩ ohms
R4
Resistance
10kΩ ohms
C2
Capacitance
10uF
C1
Capacitance
10uF
C4
Capacitance
10uF
R7
Resistance
22kΩ ohms
R8
Resistance
22kΩ ohms
RV1
Resistance
10kΩ
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
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    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
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    Power Net Portal
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  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
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  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
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    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
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  • 875105359001
    875105359001
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  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
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Remote Lime Heat-Ray thumbnail
CT (0-5A AC) to 0-3.3V DC galvanically-isolated signal conditioner

Properties

Diagram



  
    
  
  
    
  



""Primary domain - CT side""


""Isolation barrier""


""Secondary domain - MCU side""




















LED drive

PD2 current

















"J3 node_5V input"
"+5V_PRI"
"+5V_ISO"
"GND1"
"GND2"
"J1 CT input"
"R_BURDEN shunt"
"U1 precision full-wave rectifier"
"RC filter stage 1"
"RC filter stage 2"
"U2 TL071 LED driver"
"U3 HCNR201 analog optocoupler"
"U_DCDC B0505S isolated DC-DC"
"U4 MCP6001 transimpedance"
"U5 MCP6001 gain 1.65"
"Zener clamp + RC"
"J2 ADC output"

Pricing & Availability

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