I'm using an MCP73213 to charge a two-cell 7.4v LiPo battery using this circuit, when I tried charging the battery it was fine when I did this steps:

  1. Connect 12V power source

  2. Connect LiPo Battery

But when I had the LiPo 1000 mAh Battery connected and then I plugged the 12V Power Source which is a wall adapter the MCP73213 started burning and it's no good right now, I'd like some help unraveling this mistery since I don't know why this happened.

I noticed the MCP73213 is heating a lot but this IC shouldn't be burned since it has thermal regulation which reduces the charging speed whenever the temperature goes beyond 85°C (Datasheet section 5.9)

MCP73213 charging schematic lipo

Wall adapter https://www.amazon.com/gp/product/B00KZ2ZQE8/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Battery https://www.amazon.com/gp/product/B0072AEHIC/ref=oh_aui_detailpage_o07_s01?ie=UTF8&psc=1

  • \$\begingroup\$ Where is your Cout? Cin? Section 3.2 of datasheet: Connect to the positive terminal of the battery. Bypass to VSS with a minimum of 1 μF to ensure loop stability when the battery is disconnected. Section 5.3.3 The MCP73213 detects the battery presence with charging of the output capacitor... \$\endgroup\$ – Misunderstood Mar 19 '17 at 3:12
  • \$\begingroup\$ I just edited the image, I have a Cout but not a Cin, do you think having no Cin might've burned the IC? \$\endgroup\$ – Yasu Flores Mar 19 '17 at 3:18
  • \$\begingroup\$ No Cin would not do that. I probably do not know more than you. There are some guys on here that are very good at these types of things. \$\endgroup\$ – Misunderstood Mar 19 '17 at 3:24
  • \$\begingroup\$ What is the capacity (mAh) of your battery, and what is the 12V power source? \$\endgroup\$ – Bruce Abbott Mar 19 '17 at 7:30
  • \$\begingroup\$ 1000 mAh and a wall adapter, I edited the question \$\endgroup\$ – Yasu Flores Mar 19 '17 at 9:28

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