Power management

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Wireless Charging solution Wiki

This Topic is used for Wireless Charging solution 1.Mcu C drive code: GitHub - STMicroelectronics/STWirelessCharging-C-Drivers: Standard C platform-independent drivers for wireless charging ICs 2. Python drive code, check attach file "Python_FT260_S...

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willzhou by ST Employee
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  • 15 replies
  • 10 kudos

LED2001PHR based driver does not work

Posted on December 30, 2017 at 11:16I have a LED2001PHR based LED driver that is designed to drive a string of LEDs at 5.2V and 3A. When I apply power and the LEDs are connected, the LEDs flash for a fraction of a second and then go off telling me t...

STGAP2D Interlock

Hello,I have a problem with STGAP2D and the interlock pin.If the interlock pin is on GND, SD and Brake are high, INB is high and the INA is high for 1s after this time 10ms low, than again 1s high and again 10ms low and so on.The output A is only low...

STH by Associate II
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  • 5 replies
  • 1 kudos

STC3117 Missing battery detection

If the IC is powered by the battery, how does missing battery detection work ? I am working on a product which will have a USB interface and a single cell Li-Ion battery with charging circuit and a gas gauge. I need to take care of scenarios where th...

Resolved! STWBC86 Overheating

  Hello, I've designed a PCB with a schematic nearly identical to the STEVAL-WBC86TX. The only modifications are a capacitor and coil size change, which I've also implemented on a development board for direct comparison. On the development board, my ...

MikeP by Senior
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  • 14 replies
  • 2 kudos

is an output control switch of LED2001 practical

Dear Support/Expert I have a question about LED2001, is it practical to apply a relay to switch the LED off, but keep the DIM enabled.  as in the schematic. if K21 is off, it will cut the current off of the output, but the DIM pin of the LED2001 is s...

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Dsun.21 by Associate II
  • 570 Views
  • 3 replies
  • 1 kudos

SPV1040 not working as expected

I have this design using SPV1040 It uses SM102K06L solar panels, that have Vmpp = 3.35V, Impp = 0.406 A (Pmpp = 1.36W). The output must charge a 4.2 Li-Ion battery. At direct sunlight with one panel, I am measuring 0.39 A, and 1.81 V (voltage measure...

doragasu by Associate
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  • 0 replies
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Resolved! Follow up Case: 00206525

Dear Support, This is Lindy From NKG GQA team and I would like to follow up on Case No. 00206525. We would like to understand if there is any update regarding the Smelter CID002645 and CID003470 removal as requested by WD. Could you please provide th...

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Lindy by Associate
  • 548 Views
  • 3 replies
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VIPER26LD 310VDC to 15VDC Converter Design Issue

Hi,  I have used following STM reference design for the buck converter. When I power the circuit output doesn't stabilize. What am I missing?   This is from. STEVAL-IHM023V3 Here is my design.   Here is the layout   Best Regards.  

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AAdin.1 by Associate II
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  • 5 replies
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Electronic speed controller for Drones

I'm designing an ESC for a drone. I found STM's UM2197 design document. I have a question why this DC link capacitor design uses 2 Capacitors in parallel (P/N 35ZLH330MEFC10X12.5) of Rubycon.This capacitor has the following parameters: Ripple Current...

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Thanh by Associate
  • 433 Views
  • 1 replies
  • 0 kudos