board/pd_blocker.sch

v 20211219 2
C 0 -700 1 0 0 title.sym
{
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date=$date$
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org=CuVoodoo
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authors=King Kévin
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title=USB-C Power Delivery blocker
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version=$version$
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revision=$revision$
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licence=CERN-OHL-S
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device=none
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footprint=none
}
C 3500 1900 1 0 0 chassis.sym
C -2900 1800 1 0 0 chassis.sym
C -4400 1900 1 0 0 GND.sym
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N -3900 2100 -3900 2300 4
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C 2000 1900 1 0 0 GND.sym
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N 3200 5500 3200 5300 4
N 3700 2200 3700 2300 4
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{
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netname=VBUS1
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N -3200 5500 -3200 5300 4
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{
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{
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netname=RX1+
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{
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netname=RX1-
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{
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{
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{
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netname=D+B
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N -1400 3500 -600 3500 4
{
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netname=CC2
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N -1400 3300 -600 3300 4
{
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netname=TX2-
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{
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{
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{
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{
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{
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netname=CC2
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{
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{
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N 800 3500 0 3500 4
{
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netname=SBU1
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N 800 3300 0 3300 4
{
T 500 3300 5 10 1 1 0 6 1
netname=RX2-
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N 800 3100 0 3100 4
{
T 500 3100 5 10 1 1 0 6 1
netname=RX2+
}
C -5200 400 1 270 1 C0603.sym
{
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footprint=CAPC1608X92N.lht
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refdes=C2
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device=C0603
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value=100nF
}
C -5400 400 1 90 0 C0603.sym
{
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footprint=CAPC1608X92N.lht
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refdes=C1
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device=C0603
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value=100nF
}
C -5000 200 1 0 0 GND.sym
C -5800 200 1 0 0 GND.sym
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{
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netname=CC2
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N -5700 800 -5700 1300 4
{
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netname=CC1
}
T -6400 -600 9 10 1 0 0 0 3
capacitors block PD communication
by smoothing out the 300 Kpbs signal,
but still permits Rx identification
C -1400 6900 1 0 0 LM393D_part-1-2-COMP1.sym
{
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footprint=SOIC127P600X175-8N.lht
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refdes=U1
T -200 8160 5 10 1 1 0 0 1
device=LM393D
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lcsc=C2977085
}
C 4800 6900 1 0 1 LM393D_part-2-2-COMP2.sym
{
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footprint=SOIC127P600X175-8N.lht
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refdes=U1
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device=LM393D
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lcsc=C2977085
}
C 400 8600 1 270 1 40P05.sym
{
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refdes=Q1
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device=40P05
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lcsc=C2886385
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C -400 6700 1 0 0 GND.sym
N -2000 9600 400 9600 4
{
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netname=VBUS1
}
N -1400 7600 -1600 7600 4
{
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netname=VREF
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T 1900 10000 9 10 1 0 0 0 2
Vgs limit (± 20V) never reached because
pulled down only when VBUS ≤ 5.5V
C -2100 9200 1 270 0 resistor-1.sym
{
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device=RESISTOR
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refdes=R1
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value=34k
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footprint=UC1608X55N.lht
T -2100 9200 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C -2100 7800 1 270 0 resistor-1.sym
{
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device=RESISTOR
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refdes=R2
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value=21k
T -1600 7600 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T -2100 7800 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
T -2700 7000 9 10 1 0 90 0 2
Vref = R2/(R1+R2) * Vover
2.1 = 21/(34+21) *5.5
C -2100 6700 1 0 0 GND.sym
N -2000 8300 -2000 7800 4
N -1400 7800 -2000 7800 4
{
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netname=VOVER1
}
N -2000 9600 -2000 9200 4
C 3000 8600 1 90 0 40P05.sym
{
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footprint=SOT95P237X112-3N.lht
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refdes=Q2
T 2060 9660 5 10 1 1 0 0 1
device=40P05
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lcsc=C2886385
}
C 3800 6700 1 0 1 GND.sym
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{
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netname=VBUS2
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N 4800 7600 5000 7600 4
{
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netname=VREF
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C 5500 9200 1 90 1 resistor-1.sym
{
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device=RESISTOR
T 5000 9000 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 5600 8800 5 10 1 1 0 0 1
refdes=R5
T 5600 8500 5 10 1 1 0 0 1
value=34k
T 5500 9200 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C 5500 7800 1 90 1 resistor-1.sym
{
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footprint=UC1608X55N.lht
T 5600 7400 5 10 1 1 0 0 1
refdes=R6
T 5600 7100 5 10 1 1 0 0 1
value=21k
T 5500 7800 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C 5500 6700 1 0 1 GND.sym
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N 4800 7800 5400 7800 4
{
T 4600 7800 5 10 1 1 0 0 1
netname=VOVER2
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N 5400 9600 5400 9200 4
N 1600 9600 1800 9600 4
{
T 1500 9600 5 10 1 1 0 0 1
netname=VBUS
}
C -1200 -800 1 0 0 HEADER-2.54-1x10.sym
{
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footprint=CONNECTOR_HEADER-2.54-1X10.lht
T -600 1560 5 10 1 1 0 3 1
refdes=J3
T -600 -760 5 10 0 1 0 5 1
device=HEADER-2.54-1x10
T -900 -700 5 10 1 1 0 6 1
value=DEBUG
}
C -1400 1400 1 270 0 GND.sym
N -1200 1100 -1900 1100 4
{
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netname=VBUS1
}
N -1200 900 -1900 900 4
{
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netname=VREF1
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N -1200 500 -1900 500 4
{
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netname=CC2
}
N -1200 700 -1900 700 4
{
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netname=VOVER1
}
N -1200 -500 -1900 -500 4
{
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netname=VBUS2
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N -1200 100 -1900 100 4
{
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netname=CC1
}
N -1200 -100 -1900 -100 4
{
T -1200 -100 5 10 1 1 0 6 1
netname=VOVER2
}
N -1200 -300 -1900 -300 4
{
T -1200 -300 5 10 1 1 0 6 1
netname=VREF2
}
N -1200 300 -1900 300 4
{
T -1200 300 5 10 1 1 0 6 1
netname=VBUS
}
C 800 2300 1 0 0 XKB_U262-24XN-4BV60.sym
{
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footprint=CONNECTOR_XKB_U262-24XN-4BV60.lht
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refdes=J2
T 3760 2640 5 10 0 1 0 2 1
device=XKB_U262-24XN-4BV60
T 3300 5000 5 10 1 1 0 0 1
value=USB-C receptacle
T 3600 4000 5 10 0 1 0 0 1
lcsc=C388659
}
C -5600 2300 1 0 0 XKB_U261-24XN-4BC2LS.sym
{
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footprint=CONNECTOR_XKB_U261-24XN-4BC2LS.lht
T -5200 4960 5 10 1 1 0 0 1
refdes=J1
T -2540 2640 5 10 0 1 0 2 1
device=XKB_U261-24XN-4BC2LS
T -5600 2300 5 10 0 0 0 0 1
lcsc=C2880648
T -3000 5000 5 10 1 1 0 0 1
value=USB-C plug
}
N -2700 2100 -2700 2300 4
N -2900 2100 -2900 2300 4
N -3100 2100 -3100 2300 4
T -6900 10200 9 10 1 0 0 0 1
over-voltage protection
T -6500 1500 9 10 1 0 0 0 1
communication protection
T -1600 10000 9 10 1 0 0 0 2
two pMOS are required to
block VBUS in both directions
C -5800 9300 1 0 0 BAV74_part-1-2-D1.sym
{
T -5800 9300 5 8 0 0 0 0 1
footprint=SOT95P237X112-3N.lht
T -5600 9660 5 10 1 1 0 3 1
refdes=D1
T -5600 9340 5 10 1 1 0 5 1
device=BAV74
}
C -4600 9300 1 0 1 BAV74_part-2-2-D2.sym
{
T -4600 9300 5 8 0 0 0 6 1
footprint=SOT95P237X112-3N.lht
T -4800 9660 5 10 1 1 0 3 1
refdes=D1
T -4800 9340 5 10 1 1 0 5 1
device=BAV74
}
T -6600 8700 9 10 1 0 0 0 2
diodes prevent VBUS
cross-leakage
C -5400 9500 1 0 0 VCC.sym
N -5800 9500 -6500 9500 4
{
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netname=VBUS1
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N -5400 9500 -5000 9500 4
N -4600 9500 -3900 9500 4
{
T -4600 9500 5 10 1 1 0 0 1
netname=VBUS2
}
C 3500 8500 1 0 0 VCC.sym
C -500 8500 1 0 0 VCC.sym
C 500 9600 1 90 1 resistor-1.sym
{
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device=RESISTOR
T 200 9200 5 10 1 1 0 6 1
refdes=R3
T 200 8900 5 10 1 1 0 6 1
value=100k
T 0 9400 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 500 9600 5 10 0 1 0 6 1
description=resistor, chip, 0603 (metric 1608), 1%
}
N 400 8700 400 8600 4
N 400 8600 800 8600 4
C 2900 9600 1 270 0 resistor-1.sym
{
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device=RESISTOR
T 3400 9400 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T 3200 9200 5 10 1 1 0 0 1
refdes=R4
T 3200 8900 5 10 1 1 0 0 1
value=100k
T 2900 9600 5 10 0 1 0 6 1
description=resistor, chip, 0603 (metric 1608), 1%
}
N 3000 8700 3000 8600 4
N 2600 8600 3000 8600 4
N 800 8600 800 7700 4
T 700 7400 9 10 1 0 0 0 1
open-collector output
C -6400 7100 1 0 0 HT75xx-3.sym
{
T -6400 7100 5 8 0 0 0 0 1
footprint=SOT95P280X145-5N.fp
T -5850 8260 5 10 1 1 0 3 1
refdes=U2
T -5340 7440 5 10 0 1 0 2 1
device=HT75xx-3
T -5500 8300 5 10 1 1 0 0 1
value=HT7521-3
}
T -6900 6400 9 10 1 0 0 0 2
Vref ≤ VBUSmin - D1_Vf - LM393_Vicm
Vref ≤ 4.75 - 0.715 - 1.5 = 2.5V
C -6600 8000 1 0 0 VCC.sym
C -5500 6900 1 0 0 GND.sym
N -4300 8000 -3700 8000 4
{
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netname=VREF
}
N 2600 7700 2600 8600 4