SolarLader/LNSC-2420
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Added resistors to protect the driver MOSFET gates

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These were missing in v1.0 and have been patched in during assembly.
Without R32 and R33, too much voltage difference would be applied to the
gates of the driver transistors Q2 and Q7, destroying the transistors.
This commit is contained in:
Thomas Kolb 2021-06-12 21:39:57 +02:00
parent 39166f4c92
commit 973d1f0b6f
1 changed files with 74 additions and 48 deletions
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122
switching.sch
View file

@ -592,7 +592,7 @@ L Device:R R5
U 1 1 6090AC2B
P 2000 950
F 0 "R5" V 2207 950 50 0000 C CNN
F 1 "100k" V 2116 950 50 0000 C CNN
F 1 "47k" V 2116 950 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1930 950 50 0001 C CNN
F 3 "~" H 2000 950 50 0001 C CNN
1 2000 950
@ -601,20 +601,20 @@ $EndComp
$Comp
L power:GND #PWR08
U 1 1 6090A86E
P 1750 2000
F 0 "#PWR08" H 1750 1750 50 0001 C CNN
F 1 "GND" H 1755 1827 50 0000 C CNN
F 2 "" H 1750 2000 50 0001 C CNN
F 3 "" H 1750 2000 50 0001 C CNN
1 1750 2000
P 1750 2150
F 0 "#PWR08" H 1750 1900 50 0001 C CNN
F 1 "GND" H 1755 1977 50 0000 C CNN
F 2 "" H 1750 2150 50 0001 C CNN
F 3 "" H 1750 2150 50 0001 C CNN
1 1750 2150
1 0 0 -1
$EndComp
Wire Wire Line
1750 1900 1750 2000
1750 2100 1750 2150
Wire Wire Line
1750 1200 1950 1200
Wire Wire Line
1750 1500 1750 1200
1750 1700 1750 1600
Wire Wire Line
2250 900 2250 950
$Comp
@ -631,27 +631,27 @@ $EndComp
$Comp
L Transistor_FET:2N7002 Q1
U 1 1 608A7BB3
P 1650 1700
F 0 "Q1" H 1854 1746 50 0000 L CNN
F 1 "2N7002" H 1854 1655 50 0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 1850 1625 50 0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF" H 1650 1700 50 0001 L CNN
1 1650 1700
P 1650 1900
F 0 "Q1" H 1854 1946 50 0000 L CNN
F 1 "2N7002" H 1854 1855 50 0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 1850 1825 50 0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF" H 1650 1900 50 0001 L CNN
1 1650 1900
1 0 0 -1
$EndComp
Wire Wire Line
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1400 1900 1450 1900
Wire Wire Line
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1050 1900 1100 1900
$Comp
L Device:R R1
U 1 1 6088F7A2
P 1250 1700
F 0 "R1" V 1043 1700 50 0000 C CNN
F 1 "10k" V 1134 1700 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1180 1700 50 0001 C CNN
F 3 "~" H 1250 1700 50 0001 C CNN
1 1250 1700
P 1250 1900
F 0 "R1" V 1043 1900 50 0000 C CNN
F 1 "10k" V 1134 1900 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1180 1900 50 0001 C CNN
F 3 "~" H 1250 1900 50 0001 C CNN
1 1250 1900
0 1 1 0
$EndComp
Text GLabel 1000 2500 0 50 Input ~ 0
@ -739,7 +739,7 @@ L Device:R R20
U 1 1 6094D851
P 9250 950
F 0 "R20" V 9457 950 50 0000 C CNN
F 1 "100k" V 9366 950 50 0000 C CNN
F 1 "47k" V 9366 950 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 9180 950 50 0001 C CNN
F 3 "~" H 9250 950 50 0001 C CNN
1 9250 950
@ -748,18 +748,18 @@ $EndComp
$Comp
L power:GND #PWR021
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F 1 "GND" H 9005 1827 50 0000 C CNN
F 2 "" H 9000 2000 50 0001 C CNN
F 3 "" H 9000 2000 50 0001 C CNN
1 9000 2000
P 9000 2100
F 0 "#PWR021" H 9000 1850 50 0001 C CNN
F 1 "GND" H 9005 1927 50 0000 C CNN
F 2 "" H 9000 2100 50 0001 C CNN
F 3 "" H 9000 2100 50 0001 C CNN
1 9000 2100
1 0 0 -1
$EndComp
Wire Wire Line
9000 1200 9200 1200
Wire Wire Line
9000 1500 9000 1200
9000 1600 9000 1550
Wire Wire Line
9500 900 9500 950
$Comp
@ -776,27 +776,27 @@ $EndComp
$Comp
L Transistor_FET:2N7002 Q6
U 1 1 6094D873
P 8900 1700
F 0 "Q6" H 9104 1746 50 0000 L CNN
F 1 "2N7002" H 9104 1655 50 0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 9100 1625 50 0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF" H 8900 1700 50 0001 L CNN
1 8900 1700
P 8900 1800
F 0 "Q6" H 9104 1846 50 0000 L CNN
F 1 "2N7002" H 9104 1755 50 0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 9100 1725 50 0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF" H 8900 1800 50 0001 L CNN
1 8900 1800
1 0 0 -1
$EndComp
Wire Wire Line
8650 1700 8700 1700
8650 1800 8700 1800
Wire Wire Line
8300 1700 8350 1700
8300 1800 8350 1800
$Comp
L Device:R R18
U 1 1 6094D87F
P 8500 1700
F 0 "R18" V 8293 1700 50 0000 C CNN
F 1 "10k" V 8384 1700 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 8430 1700 50 0001 C CNN
F 3 "~" H 8500 1700 50 0001 C CNN
1 8500 1700
P 8500 1800
F 0 "R18" V 8293 1800 50 0000 C CNN
F 1 "10k" V 8384 1800 50 0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 8430 1800 50 0001 C CNN
F 3 "~" H 8500 1800 50 0001 C CNN
1 8500 1800
0 1 1 0
$EndComp
Wire Wire Line
@ -848,7 +848,7 @@ Wire Wire Line
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Connection ~ 9500 2000
Wire Wire Line
9000 2000 9000 1900
9000 2100 9000 2000
$Comp
L Device:R R2
U 1 1 6097F850
@ -974,13 +974,13 @@ Text GLabel 6750 6050 2 50 Output ~ 0
Meas_U_SW
Text GLabel 6750 5300 2 50 Output ~ 0
Meas_U_Solar
Text GLabel 1050 1700 0 50 Input ~ 0
Text GLabel 1050 1900 0 50 Input ~ 0
Solar_Sw
Text GLabel 7100 4000 1 50 Output ~ 0
Meas_I_Solar
Text GLabel 9950 5650 2 50 Output ~ 0
Meas_U_Bat
Text GLabel 8300 1700 0 50 Input ~ 0
Text GLabel 8300 1800 0 50 Input ~ 0
Load_Sw
Text GLabel 10700 4000 1 50 Output ~ 0
Meas_I_Load
@ -1311,4 +1311,30 @@ F 3 "~" H 2250 1700 50 0001 C CNN
1 2250 1700
-1 0 0 1
$EndComp
$Comp
L Device:R R32
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F 1 "220k" H 1680 1495 50 0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1680 1450 50 0001 C CNN
F 3 "~" H 1750 1450 50 0001 C CNN
1 1750 1450
-1 0 0 1
$EndComp
Wire Wire Line
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$Comp
L Device:R R33
U 1 1 60C7F36D
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F 0 "R33" H 8930 1354 50 0000 R CNN
F 1 "220k" H 8930 1445 50 0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 8930 1400 50 0001 C CNN
F 3 "~" H 9000 1400 50 0001 C CNN
1 9000 1400
-1 0 0 1
$EndComp
Wire Wire Line
9000 1250 9000 1200
$EndSCHEMATC