truclacicr
Badcaps Veteran
Last Activity: Yesterday, 10:58 PM
Joined: 04-21-2019
Location: brisbane
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Yes, it matches the pinout (CLSXFD). -
https://[URL]https://ok.100y.com.tw/...L] (datasheet)[URL]https://ok.100y.com.tw/Goods/35473[/URL] (MMSZ5235BT1G)
[url]https://www.mpartn.com/wp-content/uploads/2021/04/MMSZ5235BT1G.jpg[/url] (photo)
[URL]https://www.onsemi.com/download/data-sheet/pdf/mmsz5221bt1-d.pdf[/URL] (datasheet)https://[URL]https://ok.100y.com.tw/...BT1G.jpg[/url]Last edited by truclacicr; 06-14-2025, 12:30 PM.Leave a comment:
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Try to determine how much current those resistors are required to carry in that circuit, then calculate the wattages to see if they make sense.
FWIW, D10 is a 1A 40V Schottky Diode (VS-10BQ040-M3/5BT):
[URL="https://lt.rsdelivers.com/product/vishay/vs-10bq040-m3/5bt/vishay-40v-1a-schottky-diode-2-pin-do-214aa-vs-m3/5bt/5431566P"]https://lt.rsdelivers.com/product/vishay/vs-10bq040-m3/5bt/vishay-40v-1a-schottky-diode-2-pin-do-214aa-vs-m3/5bt/5431566P
https://www.vishay.com/docs/93335/vs-10bq040m.pdf[/URL]Try to determine how much current those resistorsLast edited by truclacicr; 06-11-2025, 06:28 PM.Leave a comment:
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It seems to me that the resistor should carry a reasonably high current, so 11 ohms doesn't make sense....Leave a comment:
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I would think the same as you. I don't recall ever seeing that marking style, though. Can you show us the whole PCB? Maybe we could infer an appropriate value by determining the functions of the resistors in the circuit.Leave a comment:
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Those surge "protectors" are crap.
If you must use one of these devices, then I would pay the extra money for something like this:
[url]https://tripplite.eaton.com/products/power-surge-protectors-explained[/url]https://Those surge "protectors" are...xplained[/url]Last edited by truclacicr; 06-04-2025, 01:20 PM.Leave a comment:
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Maybe MTDN7002ZHS6R?
[URL]https://pdf.tixer.ru/1025969.pdf[/URL]
[URL]https://www.taobao.com/list/item/543778034154.htm[/URL]
[url]https://gw.alicdn.com/imgextra/i3/828938080/O1CN013VMZcy29YgzhJlgw2_!!828938080.jpg[/url] (photo)https://Maybe MTDN7002ZHS6R?<br /> <...[/url] (photo)Maybe MTDN7002ZHS6R?
[URL]https://pdf.tixer.ru/1025969.pdf[/URL]Leave a comment:
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https://[URL]https://www.nichicon.co...16V, WJ series[URL]https://www.nichicon.co.jp/english/products/pdf/e-wj.pdf[/URL]
10uF, 16V, WJ seriesLeave a comment:
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You can use an SMBJ12A or SMCJ12A, depending on the dimensions. The capacitor should be OK -- the shorted diode is making it look bad.Leave a comment:
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Better datasheet:
[url]https://www.lcsc.com/datasheet/lcsc_datasheet_2412091214_TDK-FFE1070MS10RBL_C19470389.pdf[/url]https://Better datasheet:<br /> <br ...0389.pdf[/url]Leave a comment:
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The ceramic filter is a bandpass type with a relatively narrow bandwidth. A 6.7MHz filter will not work.
[URL]http://datasheet.iiic.cc/datasheets-1/tdk/FFE1070MS.pdf[/URL]https://The ceramic filter is a band...70MS.pdf[/URL]...Last edited by truclacicr; 05-28-2025, 12:30 PM.Leave a comment:
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Thanks lotas. The datasheet says it's a ceramic filter, but it doesn't tell us much more.Leave a comment:
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What are the markings on the 4126 IC?
Is there an FCC ID for this receiver?...Leave a comment:
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It's a Richtek IC (RT6338BGQUF).
[URL]https://www.google.com/search?imgtype=photo&q=rw%3D%20richtek&tbs=isch%3A1%2Cisz%3Am&udm=2[/URL]
[URL]https://www.richtek.com/assets/product_file/RT6338/DS6338-03.pdf[/URL]https://It's a Richtek IC (RT6338BGQ...8-03.pdf[/URL]It's a Richtek IC (RT6338BGQUF).
[URL]https://www.google.com/search?imgtype=photo&q=rw%3D%20richtek&tbs=isch%3A1%2Cisz%3Am&udm=2[/URL]Last edited by truclacicr; 05-26-2025, 04:58 PM.Leave a comment:
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It's PWM.
MPPT controllers have large coils:
[URL="https://www.google.com/search?q=MPPT+controller+pcb&udm=2&sclient=img"]https://www.google.com/search?q=MPPT+controller+pcb&udm=2&sclient=img
https://hilelectronic.com/mppt-controller/[/URL] (includes circuit diagram)
[url]https://makingcircuits.com/blog/mppt-solar-charger-3-step-charger-circuit/[/url] (DIY project)It's PWM.
MPPT controllers have large coils:
[URL="https://www.google.com/search?q=MPPT+controller+pcb&udm=2&sclient=img"]https://www.google.com/search?q=MPPT+controller+pcb&udm=2&sclient=imgLast edited by truclacicr; 05-25-2025, 07:07 PM.Leave a comment:
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It looks like an ordinary PWM controller to me.
U6 and L3 appear to be associated with the USB ports.
U1, L1 and U4 appear to power the ICs on the PCB.
This appears to be the user guide:
[URL]https://ia804609.us.archive.org/2/items/solar-charger-controller-pwm-sy-48100-a/SolarChargerController-PWM-SY48100A_text.pdf[/URL]
I see nothing that would be consistent with an MPPT controller.
This appears to be the design registration for the box (SY48100A):
[URL]https://qxb-img-osscache.qixin.com/patents_pdf_new/7f5e2ca0011eb6065ee454194f0dbe56.pdf[/URL]...Last edited by truclacicr; 05-25-2025, 04:40 PM.Leave a comment:
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I intentionally used the example of a dead flat battery to illustrate max power (bulk) charging. The typical battery chemistry for solar applications is LiFePO4.
[url]https://www.solar4rvs.com.au/assets/images/Chart%20LiFePO4%20charge%20and%20discharge.png[/url]
The initial phase involves bulk charging at a constant current. The final phase is constant voltage charging.https://I intentionally used the exa...arge.png[/url]...Leave a comment:
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The whole point of an MPPT charger is that the panel is operating at its maximum power point.
Here is an example of a 175W panel:
[URL]https://www.4x4industries.com.au/products/victron-solar-panel-monocrystalline-12v-175w-1485x668x30mm[/URL][LIST][*]Nominal Power (Pmpp): 175W[*]Max Power Voltage (Vmpp): 19.4V[*]Max Power Current (Impp): 9.03A[*]Open Circuit Voltage (Voc): 23.7V[*]Short Circuit Current (lsc): 9.89A[/LIST]Max power = 19.4V x 9.03A = 175W
If the battery voltage is 12v, say, then the panel voltage will be 19.4V and the panel current will be 9.03A...Leave a comment:
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If it's a genuine MPPT controller, then panel voltage and current should differ from battery voltage and current. Does the LCD show these parameters separately? Is there a large inductor inside?Leave a comment:
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Nothing on the web site ...
[url]http://en.cresemi.com/[/url]
Other CRE datasheets here:
[url]https://datasheet4u.com/share_search.php?sWord=CRE[/url]https://Nothing on the web site ...<...Word=CRE[/url]Nothing on the web site ...
[url]http://en.cresemi.com/[/url]
Other CRE datasheets here:
[url]https://datasheet4u.com/share_search.php?sWord=CRE[/url]Nothing on the web site ...
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