Changes for page Power controller
Last modified by Mathias Larsen on 2026/09/24 21:21
From version 38.1
edited by Mathias Larsen
on 2026/09/23 18:47
on 2026/09/23 18:47
Change comment:
There is no comment for this version
To version 39.1
edited by Mathias Larsen
on 2026/09/24 21:21
on 2026/09/24 21:21
Change comment:
There is no comment for this version
Summary
-
Page properties (1 modified, 0 added, 0 removed)
Details
- Page properties
-
- Content
-
... ... @@ -117,15 +117,6 @@ 117 117 118 118 [[image:1790100104451-169.png]] 119 119 120 -|=Component|=Value|=Ref Des (circuit 1) 121 -|Fuse holder|Littelfuse nano|F101 122 -|Shunt resistor|2 mΩ, 1 %, 5 W, 2512|R101 123 -|Filter resistor|10 kΩ|R102 124 -|Filter capacitor|10 nF|C101 125 -|Green LED resistor|4.7 kΩ, 0805|R103 126 -|Red LED resistor|350 Ω|R104 127 -|RGB LED|Würth 150282M167310|D101 128 - 129 129 === Green LED === 130 130 131 131 The green LED indicates whether the fuse is intact. It is connected from the output side of the fuse to ground through a 4.7 kΩ resistor. When the fuse is intact, the LED lights up. If the fuse blows, the LED loses its supply and turns off. This makes it easy to find a blown fuse by looking at the board. ... ... @@ -190,13 +190,6 @@ 190 190 191 191 The 12 V supply is a synchronous buck converter that steps the 24 V supply down to 12 V for the pumps, inverter and data logger. It is built around an LM5148 buck controller (U801) from Texas Instruments, which drives two external N-channel power MOSFETs (IAUCN04S7L028, Q901 and Q902) as the high-side and low-side switches. The output inductor is a 0.65 µH Coilcraft XAL7070 (L901), and a 3 mΩ resistor (R910) is used for current sensing in the controller. 192 192 193 -|=Component|=Part|=Ref Des 194 -|Buck controller|LM5148RGYR|U801 195 -|Power MOSFETs|IAUCN04S7L028ATMA1|Q901, Q902 196 -|Inductor|XAL7070-651MEB, 0.65 µH|L901 197 -|Current sense resistor|3 mΩ, 3 W|R910 198 -|Output capacitors|22 µF, 25 V|C909–C912 199 - 200 200 The buck converter overheated under load and made a whining sound. 201 201 202 202 [[image:1790102044737-969.png||height="368" width="925"]] ... ... @@ -244,14 +244,6 @@ 244 244 245 245 [[image:1790181075885-591.png||height="343" width="367"]] 246 246 247 -|=Function|=Buzzer / brake light 248 -|Supply|24 V 249 -|N-channel MOSFET|BSS123NH6327XTSA1 (Q803, Q804) 250 -|P-channel MOSFET|BSS83PH6327XTSA1 (Q801, Q802) 251 -|Gate resistor|1 kΩ (R807, R808) 252 -|Pull-down / pull-up / divider|10 kΩ (R805, R806, R809–R812) 253 -|Maximum output current|330 mA 254 - 255 255 ==== Pump ==== 256 256 257 257 The N-channel MOSFET (BSS123NH6327XTSA1) is the same as for the buzzer and brake light, but the P-channel MOSFET (BSC084P03NS3GATMA1) has a much higher current rating. ... ... @@ -260,14 +260,6 @@ 260 260 261 261 [[image:1790181054296-268.png||height="306" width="371"]] 262 262 263 -|=Function|=Pump 1 / Pump 2 264 -|Supply|12 V 265 -|N-channel MOSFET|BSS123NH6327XTSA1 (Q905, Q906) 266 -|P-channel MOSFET|BSC084P03NS3GATMA1 (Q903, Q904) 267 -|Gate resistor|1 kΩ (R913, R914) 268 -|Pull-down / pull-up|10 kΩ (R911, R912, R915, R916) 269 -|Maximum output current|5 A 270 - 271 271 == Known issues == 272 272 273 273 * The 12 V supply did not work.