kingkevin
/
board
1
0
Fork 0
Code Issues Pull Requests Projects Releases 37 Wiki Activity

sch: use LDO as voltage reference

This commit is contained in:
King Kévin 2022-04-12 15:16:06 +02:00
parent 09a33c8030
commit b7fce82fd8
1 changed files with 150 additions and 211 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

361
pd_blocker.sch
View File

@ -257,214 +257,149 @@ 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 6100 1 0 0 LM393D_part-1-2-COMP1.sym
C -1400 6900 1 0 0 LM393D_part-1-2-COMP1.sym
{
T -1400 6100 5 8 0 0 0 0 1
T -1400 6900 5 8 0 0 0 0 1
footprint=SOIC127P600X175-8N.lht
T -1000 7420 5 10 1 1 0 0 1
T -1000 8220 5 10 1 1 0 0 1
refdes=U1
T -200 7360 5 10 1 1 0 0 1
T -200 8160 5 10 1 1 0 0 1
device=LM393D
T -1400 6100 5 10 0 1 0 0 1
T -1400 6900 5 10 0 1 0 0 1
lcsc=C2977085
}
C 4800 6100 1 0 1 LM393D_part-2-2-COMP2.sym
C 4800 6900 1 0 1 LM393D_part-2-2-COMP2.sym
{
T 4800 6100 5 8 0 0 0 6 1
T 4800 6900 5 8 0 0 0 6 1
footprint=SOIC127P600X175-8N.lht
T 4400 7420 5 10 1 1 0 6 1
T 4400 8220 5 10 1 1 0 6 1
refdes=U1
T 3600 7360 5 10 1 1 0 6 1
T 3600 8160 5 10 1 1 0 6 1
device=LM393D
T 4800 6100 5 10 0 1 0 0 1
T 4800 6900 5 10 0 1 0 0 1
lcsc=C2977085
}
C 400 7800 1 270 1 40P05.sym
C 400 8600 1 270 1 40P05.sym
{
T 400 7800 5 8 0 0 90 2 1
T 400 8600 5 8 0 0 90 2 1
footprint=SOT95P237X112-3N.lht
T 460 8860 5 10 1 1 180 8 1
T 460 9660 5 10 1 1 180 8 1
refdes=Q1
T 1340 8860 5 10 1 1 0 6 1
T 1340 9660 5 10 1 1 0 6 1
device=40P05
T 400 7800 5 10 0 0 0 0 1
T 400 8600 5 10 0 0 0 0 1
lcsc=C2886385
}
C -400 5900 1 0 0 GND.sym
N -2000 8800 400 8800 4
C -400 6700 1 0 0 GND.sym
N -2000 9600 400 9600 4
{
T -2000 8800 5 10 1 1 0 0 1
T -2000 9600 5 10 1 1 0 0 1
netname=VBUS1
}
C -1800 6200 1 270 1 ZENER.sym
N -1400 7600 -1600 7600 4
{
T -1800 6200 5 8 0 0 90 2 1
footprint=SODFL1608X65N.lht
T -1300 6500 5 10 1 1 0 3 1
refdes=Z1
T -1800 6400 5 10 0 1 90 3 1
device=ZENER
T -1400 6200 5 10 1 1 0 0 1
value=4.7V
T -1800 6200 5 10 0 1 0 6 1
lcsc=C2832571
T -1800 7600 5 10 1 1 0 0 1
netname=VREF
}
C -1700 5900 1 0 0 GND.sym
N -1600 6100 -1600 6200 4
N -1600 6600 -1600 7500 4
N -1400 6800 -1600 6800 4
{
T -1800 6800 5 10 1 1 0 0 1
netname=VREF1
}
T -6500 6300 9 10 1 0 0 0 2
R3 ≤ (Vsupply_min - Vzener) / Ileakage
R3 ≤ (4.75 - 4.7) / 2E-6 = 25k
C -1700 8400 1 270 0 resistor-1.sym
{
T -1300 8100 5 10 0 0 270 0 1
device=RESISTOR
T -1400 8000 5 10 1 1 0 0 1
refdes=R3
T -1400 7700 5 10 1 1 0 0 1
value=20k
T -1200 8200 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T -1700 8400 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
N -1600 8400 -1600 8800 4
T -6500 8700 9 10 1 0 0 0 2
T 1900 10000 9 10 1 0 0 0 2
Vgs limit (± 20V) never reached because
pulled low only when VBUS ≤ 5.5V
T -6500 7500 9 10 1 0 0 0 2
divider_ratio = Vref / Vover
divider_ratio = 4.7 / 5.5 = 0.8545
C -2100 8400 1 270 0 resistor-1.sym
pulled down only when VBUS ≤ 5.5V
C -2100 9200 1 270 0 resistor-1.sym
{
T -1700 8100 5 10 0 0 270 0 1
T -1700 8900 5 10 0 0 270 0 1
device=RESISTOR
T -2200 8000 5 10 1 1 0 6 1
T -2200 8800 5 10 1 1 0 6 1
refdes=R1
T -2200 7700 5 10 1 1 0 6 1
value=5k1
T -1600 8200 5 10 0 1 270 0 1
T -2200 8500 5 10 1 1 0 6 1
value=34k
T -1600 9000 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T -2100 8400 5 10 0 1 0 0 1
T -2100 9200 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C -2100 7000 1 270 0 resistor-1.sym
C -2100 7800 1 270 0 resistor-1.sym
{
T -1700 6700 5 10 0 0 270 0 1
T -1700 7500 5 10 0 0 270 0 1
device=RESISTOR
T -2200 6600 5 10 1 1 0 6 1
T -2200 7400 5 10 1 1 0 6 1
refdes=R2
T -2200 6300 5 10 1 1 0 6 1
value=30k
T -1600 6800 5 10 0 1 270 0 1
T -2200 7100 5 10 1 1 0 6 1
value=21k
T -1600 7600 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T -2100 7000 5 10 0 1 0 0 1
T -2100 7800 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
T -6500 7200 9 10 1 0 0 0 1
R2/(R1+R2) = 30/(5.1+30) = 0.8547
C -2100 5900 1 0 0 GND.sym
N -2000 7500 -2000 7000 4
N -1400 7000 -2000 7000 4
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
{
T -1200 7000 5 10 1 1 0 6 1
T -1200 7800 5 10 1 1 0 6 1
netname=VOVER1
}
N -2000 8800 -2000 8400 4
C 3000 7800 1 90 0 40P05.sym
N -2000 9600 -2000 9200 4
C 3000 8600 1 90 0 40P05.sym
{
T 3000 7800 5 8 0 0 90 0 1
T 3000 8600 5 8 0 0 90 0 1
footprint=SOT95P237X112-3N.lht
T 2940 8860 5 10 1 1 180 2 1
T 2940 9660 5 10 1 1 180 2 1
refdes=Q2
T 2060 8860 5 10 1 1 0 0 1
T 2060 9660 5 10 1 1 0 0 1
device=40P05
T 3000 7800 5 10 0 0 0 0 1
T 3000 8600 5 10 0 0 0 0 1
lcsc=C2886385
}
C 3800 5900 1 0 1 GND.sym
N 5400 8800 3000 8800 4
C 3800 6700 1 0 1 GND.sym
N 5400 9600 3000 9600 4
{
T 5400 8800 5 10 1 1 0 6 1
T 5400 9600 5 10 1 1 0 6 1
netname=VBUS2
}
C 5200 6200 1 90 0 ZENER.sym
N 4800 7600 5000 7600 4
{
T 5200 6200 5 8 0 0 90 0 1
footprint=SODFL1608X65N.lht
T 5200 6400 5 10 0 1 90 5 1
device=ZENER
T 5200 6200 5 10 0 1 0 0 1
lcsc=C2832571
T 4700 6500 5 10 1 1 0 3 1
refdes=Z4
T 4800 6200 5 10 1 1 0 6 1
value=4.7V
T 5200 7600 5 10 1 1 0 6 1
netname=VREF
}
C 5100 5900 1 0 1 GND.sym
N 5000 6100 5000 6200 4
N 5000 6600 5000 7500 4
N 4800 6800 5000 6800 4
C 5500 9200 1 90 1 resistor-1.sym
{
T 5200 6800 5 10 1 1 0 6 1
netname=VREF2
}
C 5100 8400 1 90 1 resistor-1.sym
{
T 4700 8100 5 10 0 0 270 2 1
T 5100 8900 5 10 0 0 270 2 1
device=RESISTOR
T 4600 8200 5 10 0 1 270 2 1
T 5000 9000 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 4800 8000 5 10 1 1 0 6 1
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
{
T 5100 7500 5 10 0 0 270 2 1
device=RESISTOR
T 5000 7600 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 5600 7400 5 10 1 1 0 0 1
refdes=R6
T 4800 7700 5 10 1 1 0 6 1
value=20k
T 5100 8400 5 10 0 1 0 0 1
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%
}
N 5000 8400 5000 8800 4
C 5500 8400 1 90 1 resistor-1.sym
C 5500 6700 1 0 1 GND.sym
N 5400 8300 5400 7800 4
N 4800 7800 5400 7800 4
{
T 5100 8100 5 10 0 0 270 2 1
device=RESISTOR
T 5000 8200 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 5600 8000 5 10 1 1 0 0 1
refdes=R7
T 5600 7700 5 10 1 1 0 0 1
value=5k1
T 5500 8400 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C 5500 7000 1 90 1 resistor-1.sym
{
T 5100 6700 5 10 0 0 270 2 1
device=RESISTOR
T 5000 6800 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 5600 6600 5 10 1 1 0 0 1
refdes=R8
T 5600 6300 5 10 1 1 0 0 1
value=30k
T 5500 7000 5 10 0 1 0 0 1
description=resistor, chip, 0603 (metric 1608), 1%
}
C 5500 5900 1 0 1 GND.sym
N 5400 7500 5400 7000 4
N 4800 7000 5400 7000 4
{
T 4600 7000 5 10 1 1 0 0 1
T 4600 7800 5 10 1 1 0 0 1
netname=VOVER2
}
N 5400 8800 5400 8400 4
N 1600 8800 1800 8800 4
N 5400 9600 5400 9200 4
N 1600 9600 1800 9600 4
{
T 1500 8800 5 10 1 1 0 0 1
T 1500 9600 5 10 1 1 0 0 1
netname=VBUS
}
C -1200 -800 1 0 0 HEADER-2.54-1x10.sym
@ -530,7 +465,7 @@ T 800 2300 5 8 0 0 0 0 1
footprint=CONNECTOR_XKB_U262-24XN-4BV60.lht
T 1200 4960 5 10 1 1 0 0 1
refdes=J2
T 3760 2640 5 10 1 1 0 2 1
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
@ -543,7 +478,7 @@ T -5600 2300 5 8 0 0 0 0 1
footprint=CONNECTOR_XKB_U261-24XN-4BC2LS.lht
T -5200 4960 5 10 1 1 0 0 1
refdes=J1
T -2540 2640 5 10 1 1 0 2 1
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
@ -553,96 +488,100 @@ value=USB-C plug
N -2700 2100 -2700 2300 4
N -2900 2100 -2900 2300 4
N -3100 2100 -3100 2300 4
T -6500 9900 9 10 1 0 0 0 1
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 -6500 9300 9 10 1 0 0 0 2
T -1600 10000 9 10 1 0 0 0 2
two pMOS are required to
block VBUS in both direction
C -1300 9700 1 0 0 BAV74_part-1-2-D1.sym
block VBUS in both directions
C -5800 9300 1 0 0 BAV74_part-1-2-D1.sym
{
T -1300 9700 5 8 0 0 0 0 1
T -5800 9300 5 8 0 0 0 0 1
footprint=SOT95P237X112-3N.lht
T -1100 10060 5 10 1 1 0 3 1
T -5600 9660 5 10 1 1 0 3 1
refdes=D1
T -1100 9740 5 10 1 1 0 5 1
T -5600 9340 5 10 1 1 0 5 1
device=BAV74
}
C -100 9700 1 0 1 BAV74_part-2-2-D2.sym
C -4600 9300 1 0 1 BAV74_part-2-2-D2.sym
{
T -100 9700 5 8 0 0 0 6 1
T -4600 9300 5 8 0 0 0 6 1
footprint=SOT95P237X112-3N.lht
T -300 10060 5 10 1 1 0 3 1
T -4800 9660 5 10 1 1 0 3 1
refdes=D1
T -300 9740 5 10 1 1 0 5 1
T -4800 9340 5 10 1 1 0 5 1
device=BAV74
}
T -6500 8100 9 10 1 0 0 0 2
T -6600 8700 9 10 1 0 0 0 2
diodes prevent VBUS
cross-leakage
C -900 9900 1 0 0 VCC.sym
N -1300 9900 -2000 9900 4
C -5400 9500 1 0 0 VCC.sym
N -5800 9500 -6500 9500 4
{
T -1300 9900 5 10 1 1 0 6 1
T -5800 9500 5 10 1 1 0 6 1
netname=VBUS1
}
N -900 9900 -500 9900 4
N -100 9900 600 9900 4
N -5400 9500 -5000 9500 4
N -4600 9500 -3900 9500 4
{
T -100 9900 5 10 1 1 0 0 1
T -4600 9500 5 10 1 1 0 0 1
netname=VBUS2
}
C 3500 7700 1 0 0 VCC.sym
C -500 7700 1 0 0 VCC.sym
C 500 8800 1 90 1 resistor-1.sym
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
{
T 100 8500 5 10 0 0 270 2 1
T 100 9300 5 10 0 0 270 2 1
device=RESISTOR
T 200 8400 5 10 1 1 0 6 1
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
{
T 3300 9300 5 10 0 0 270 0 1
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 200 8100 5 10 1 1 0 6 1
T 3200 8900 5 10 1 1 0 0 1
value=100k
T 0 8600 5 10 0 1 270 2 1
footprint=UC1608X55N.lht
T 500 8800 5 10 0 1 0 6 1
T 2900 9600 5 10 0 1 0 6 1
description=resistor, chip, 0603 (metric 1608), 1%
}
N 400 7900 400 7800 4
N 400 7800 1000 7800 4
C 1000 7600 1 0 0 BAV74_part-1-2-D1.sym
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 1000 7600 5 8 0 0 0 0 1
footprint=SOT95P237X112-3N.lht
T 1200 7960 5 10 1 1 0 3 1
refdes=D2
T 1200 7640 5 10 1 1 0 5 1
device=BAV74
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
}
C 2400 7600 1 0 1 BAV74_part-2-2-D2.sym
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
{
T 2400 7600 5 8 0 0 0 6 1
footprint=SOT95P237X112-3N.lht
T 2100 7960 5 10 1 1 0 3 1
refdes=D2
T 2200 7640 5 10 1 1 0 5 1
device=BAV74
T -4200 8000 5 10 1 1 0 0 1
netname=VREF
}
C 2900 8800 1 270 0 resistor-1.sym
{
T 3300 8500 5 10 0 0 270 0 1
device=RESISTOR
T 3400 8600 5 10 0 1 270 0 1
footprint=UC1608X55N.lht
T 3200 8400 5 10 1 1 0 0 1
refdes=R5
T 3200 8100 5 10 1 1 0 0 1
value=100k
T 2900 8800 5 10 0 1 0 6 1
description=resistor, chip, 0603 (metric 1608), 1%
}
N 3000 7900 3000 7800 4
N 2400 7800 3000 7800 4
N 1400 7800 2000 7800 4
N 1700 7800 1700 6900 4
N 1700 6900 800 6900 4
N 2600 7700 2600 8600 4