BOM-DAT/Resistor-Dat/resistor-ICL-dat/2026-05-23-17-56-14.png
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BOM-DAT/Resistor-Dat/resistor-ICL-dat/resistor-ICL-dat.md
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@@ -0,0 +1,53 @@
1
+
2
+# resistor-ICL-dat
3
+
4
+== PTC
5
+
6
+- [[resistor-dat]] - [[resistor-Inrush-dat]] - [[thermistor-dat]]
7
+
8
+
9
+
10
+ICL 2.5 OHM 20% 5A 13MM == inrush current suppression
11
+
12
+![](2026-05-23-17-56-14.png)
13
+
14
+Power NTC Thermistor. The MF72 series Power NTC Thermistors provide inrush current suppression for sensitive electronics. Connecting a MF72 in series with the power source will limit the current surges typically created at turn on. Once the circuit is energized the resistance of the MF72 will decrease rapidly to a very low value, power consumption can be ignored and there will be no effect on normal operating current. Using the MF72 Power NTC
15
+
16
+Thermistor is a most cost-effective way to curb surge current and protect sensitive electronics from damage.
17
+
18
+
19
+
20
+## 🔍 Purpose of 2W 300Ω Resistor Before LM317 Input
21
+
22
+### 🔧 Common Use Cases
23
+
24
+#### 1. 🛡️ Inrush Current Limiting
25
+- **Function:** When power is first applied, capacitors (especially large filter caps) can draw a big inrush current.
26
+- **The 300Ω resistor** slows the charging rate of the input capacitor.
27
+- Helps protect:
28
+ - Transformer
29
+ - Diodes (in rectifier)
30
+ - LM317 itself
31
+
32
+#### 2. 🔥 Power Dissipation / Pre-Regulation
33
+- **Drops excess voltage** before it hits the LM317
34
+- Reduces the **heat load on the LM317**, especially if there's a large **Vin − Vout** difference.
35
+
36
+For example:
37
+```
38
+Vin = 24V, Vout = 12V, Load = 50mA
39
+→ Voltage drop across LM317 = 12V
40
+→ Power = 12V × 0.05A = 0.6W (hot!)
41
+
42
+Insert a 300Ω resistor:
43
+ V = I × R = 0.05A × 300Ω = 15V drop before LM317
44
+ New Vin = 24V − 15V = 9V → not enough
45
+ So you may adjust value to drop just a few volts
46
+```
47
+
48
+- You must ensure **enough voltage remains** after the resistor so that LM317 operates normally (requires at least **Vin ≈ Vout + 2V**).
49
+
50
+
51
+## ref
52
+
53
+- [[resistor-dat]]
... ...
\ No newline at end of file
BOM-DAT/Resistor-Dat/resistor-Inrush-dat/resistor-Inrush-dat.md
... ...
@@ -1,44 +0,0 @@
1
-
2
-# resistor-Inrush-dat
3
-
4
-== PTC
5
-
6
-- [[resistor-dat]] - [[resistor-Inrush-dat]] - [[thermistor-dat]]
7
-
8
-
9
-
10
-
11
-## 🔍 Purpose of 2W 300Ω Resistor Before LM317 Input
12
-
13
-### 🔧 Common Use Cases
14
-
15
-#### 1. 🛡️ Inrush Current Limiting
16
-- **Function:** When power is first applied, capacitors (especially large filter caps) can draw a big inrush current.
17
-- **The 300Ω resistor** slows the charging rate of the input capacitor.
18
-- Helps protect:
19
- - Transformer
20
- - Diodes (in rectifier)
21
- - LM317 itself
22
-
23
-#### 2. 🔥 Power Dissipation / Pre-Regulation
24
-- **Drops excess voltage** before it hits the LM317
25
-- Reduces the **heat load on the LM317**, especially if there's a large **Vin − Vout** difference.
26
-
27
-For example:
28
-```
29
-Vin = 24V, Vout = 12V, Load = 50mA
30
-→ Voltage drop across LM317 = 12V
31
-→ Power = 12V × 0.05A = 0.6W (hot!)
32
-
33
-Insert a 300Ω resistor:
34
- V = I × R = 0.05A × 300Ω = 15V drop before LM317
35
- New Vin = 24V − 15V = 9V → not enough
36
- So you may adjust value to drop just a few volts
37
-```
38
-
39
-- You must ensure **enough voltage remains** after the resistor so that LM317 operates normally (requires at least **Vin ≈ Vout + 2V**).
40
-
41
-
42
-## ref
43
-
44
-- [[resistor-dat]]
... ...
\ No newline at end of file
BOM-DAT/Resistor-Dat/resistor-dat.md
... ...
@@ -12,7 +12,7 @@
12 12
13 13
- [[resistor-dat]] - [[resistor-trim-pot-dat]] - [[resistor-feedback-dat]]
14 14
15
-
15
+- [[resistor-ICL-dat]] - [[resistor-dat]]
16 16
17 17
Shunt Resistor:
18 18
BOM-DAT/capacitor-dat/capacitor-dat.md
... ...
@@ -4,7 +4,7 @@
4 4
- [[ESR-capacitor-dat]] - [[MLCC-dat]] - [[Electrolytic-cap-dat]] - [[tantalum-dat]]
5 5
6 6
7
-
7
+- [[capacitor-X2-dat]] - [[capacitor-dat]] - [[capacitor-x-y-dat]]
8 8
9 9
## brands
10 10
BOM-DAT/capacitor-dat/capacitor-x-y-dat/2026-05-23-17-51-56.png
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BOM-DAT/capacitor-dat/capacitor-x-y-dat/capacitor-x-y-dat.md
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@@ -1,8 +1,11 @@
1 1
2 2
# capacitor-x-y-dat
3 3
4
+- [[capacitor-X2-dat]] - [[capacitor-dat]] - [[capacitor-x-y-dat]]
4 5
5 6
7
+![](2026-05-23-17-51-56.png)
8
+
6 9
## X - Y capacitor
7 10
8 11
An X2 capacitor is a safety-rated EMI suppression capacitor designed to be connected across the AC mains (Line–Neutral).
BOM-DAT/fuse-dat/2026-05-23-17-53-42.png
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BOM-DAT/fuse-dat/fuse-dat.md
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@@ -3,6 +3,12 @@
3 3
4 4
5 5
6
+## AC fuse
7
+
8
+- [[ACDC-dat]] 3.15A
9
+
10
+![](2026-05-23-17-53-42.png)
11
+
6 12
7 13
## fuse-glass-seal-dat // 250V
8 14
Chip-dat/weltrend-dat/2026-05-23-17-44-31.png
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Chip-dat/weltrend-dat/2026-05-23-17-46-24.png
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Chip-dat/weltrend-dat/2026-05-23-17-49-13.png
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Chip-dat/weltrend-dat/weltrend-dat.md
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1
+
2
+
3
+# weltrend-dat
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+
5
+- [[USB-FC4-dat]] - [[USB-PD3-dat]] - [[USB-SDK-dat]]
6
+
7
+- [[winsok-dat]] - [[WSP4407-dat]] - [[mosfet-dat]]
8
+
9
+`WT6615F` - USB PD Controller
10
+
11
+WT6615F - USB Power Delivery and Qualcomm Quick Charge 4/4+ Controller
12
+
13
+The WT6615F is a highly integrated USB Power Delivery (PD) controller that supports USB PD 3.0 Programmable Power Supply (PPS) specification and Qualcomm® Quick ChargeTM 4.0 or Quick Charge 4+ technologies designed for USB Type-C Downstream Facing Port (Source) charging applications such as power adapters, wall chargers, car chargers, power strip, power banks, and etc.
14
+
15
+The WT6615F minimizes external components by integrating USB PD baseband PHY, Type-Cdetection, shunt regulator, voltage and current monitors, and control circuits of blocking MOSFET, and an 8-bit MCU to allow small form factor and low BOM cost.
16
+
17
+It supports wide operation voltage range from 3V to 30V without the need of an external LDO. A Multi-Time-Programmable (MTP) ROM is provided for program code and user configuration data.
18
+
19
+![](2026-05-23-17-44-31.png)
20
+
21
+https://taoic.oss-cn-hangzhou.aliyuncs.com/7581/product/tssemi168_1658973591000.pdf
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+
23
+
24
+## board
25
+
26
+![](2026-05-23-17-46-24.png)
27
+
28
+![](2026-05-23-17-49-13.png)
29
+
30
+- [[PCB-form-dat]]
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\ No newline at end of file
Chip-dat/winsok-dat/WSP4407-dat.md
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1
+
2
+
3
+# WSP4407-dat.md
4
+
5
+- [[winsok-dat]] - [[WSP4407-dat]] - [[mosfet-dat]]
... ...
\ No newline at end of file
Chip-dat/winsok-dat/winsok-dat.md
... ...
@@ -0,0 +1,7 @@
1
+
2
+
3
+# winsok-dat
4
+
5
+- [[winsok-dat]] - [[WSP4407-dat]] - [[mosfet-dat]]
6
+
7
+- [[charger-phone-dat]] - [[weltrend-dat]]
... ...
\ No newline at end of file
PCB-dat/PCB-design-dat/PCB-form-dat/2026-05-23-17-50-16.png
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PCB-dat/PCB-design-dat/PCB-form-dat/PCB-form-dat.md
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@@ -4,6 +4,10 @@
4 4
- [[mini-PCIE-dat]]
5 5
6 6
7
+plug board == [[weltrend-dat]]
8
+
9
+![](2026-05-23-17-50-16.png)
10
+
7 11
## card
8 12
9 13
![](2025-10-02-11-13-24.png)
Tech-dat/Interface-dat/USB-SDK-dat/USB-SDK-dat.md
... ...
@@ -36,6 +36,9 @@
36 36
37 37
- [[USB-FC-dat]] - [[USB-PD-dat]] - [[USB-QC-dat]] - [[USB-PPS-dat]] - [[fast-charge-protocols-dat]]
38 38
39
+- [[USB-FC4-dat]] - [[USB-PD3-dat]] - [[fast-charge-protocols-dat]]
40
+
41
+- [[weltrend-dat]]
39 42
40 43
## USB functions and enhance
41 44
app-dat/charger-phone-dat/2026-05-23-17-42-04.png
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app-dat/charger-phone-dat/charger-phone-dat.md
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1
+
2
+
3
+## charger-phone-dat
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+
5
+- [[ACDC-dat]]
6
+
7
+
8
+## build dis assemble 1
9
+
10
+![](2026-05-23-17-42-04.png)
11
+
12
+- [[winsok-dat]] - [[WSP4407-dat]] - [[mosfet-dat]]
13
+
14
+- [[charger-phone-dat]] - [[weltrend-dat]]
15
+
16
+
17
+20R100S
18
+
cable-dat/cable-power-dat/cable-JST-dat/cable-JST-dat.md
... ...
@@ -11,7 +11,7 @@
11 11
12 12
13 13
14
-- [[cable-JST-SM-dat]] - [[cable-JST-XH-dat]] - [[cable-JST-2P-dat]]
14
+- [[cable-JST-SM-dat]] - [[cable-JST-XH-dat]] - [[cable-JST-2P-dat]] - [[wire-to-wire-dat]]
15 15
16 16
17 17
## cable JST
cable-dat/wire-to-wire-dat/wire-to-wire-dat.md
... ...
@@ -1,16 +1,14 @@
1 1
2 2
# wire-to-wire-dat
3 3
4
-- [[CONN-cable-JST-dat]]
4
+
5
+- [[cable-JST-SM-dat]] - [[cable-JST-XH-dat]] - [[cable-JST-2P-dat]] - [[wire-to-wire-dat]]
5 6
6 7
7 8
## new type
8 9
9 10
- [[cable-XT-dat]]
10 11
11
-- [[cable-JST-dat]]
12
-
13
-- [[cable-JST-SM-dat]] - [[cable-JST-XH-dat]]
14 12
15 13
16 14
## Common wire-2-wire
power-dat/ACDC-dat/2026-05-23-17-50-45.png
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power-dat/ACDC-dat/2026-05-23-17-52-42.png
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power-dat/ACDC-dat/2026-05-23-17-54-08.png
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power-dat/ACDC-dat/ACDC-dat.md
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@@ -129,6 +129,21 @@ Chip Solutions
129 129
130 130
131 131
132
+## board
133
+
134
+![](2026-05-23-17-50-45.png)
135
+
136
+- [[capacitor-X2-dat]] - [[capacitor-dat]]
137
+
138
+![](2026-05-23-17-52-42.png)
139
+
140
+- [[fuse-dat]]
141
+
142
+
143
+![](2026-05-23-17-54-08.png)
144
+
145
+
146
+- [[resistor-ICL-dat]] - [[resistor-dat]]
132 147
133 148
## ref
134 149