BQ24050: does not charge

Jim Teunis

Intellectual 290 points

Part Number: BQ24050

Tool/software:

Hello,

For some reason, I cannot get BQ24050 to charge.

See schematic below

VBUS and VBATT have more capacitors connected off-screen. No current is flowing at all. Battery is at 3.85 V. TS is at 500 mV. ISET is a 0 V.

I have connected various chargers, as well as a computer with D+ and D- connected.

I have forgotten to connect ISET2, however I think it should charge at 100 mA anyway, is this not correct?

Thank you in advance.

Jim

over 1 year ago

0 Michael Emanuel35 over 1 year ago

TI__Mastermind 40575 points

Hi Jim,

What is the measured IN voltage and OUT voltage at the pin?

Regards,

Mike Emanuel

0 Jim Teunis over 1 year ago in reply to Michael Emanuel35

Intellectual 290 points

Hi Mike,

The voltage at the IN pin is 5.15 V, the voltage at the OUT pin is 3.79 V.

0 Michael Emanuel35 over 1 year ago in reply to Jim Teunis

TI__Mastermind 40575 points

Hi Jim,

Can you send the gerbers for your layout?

Have you tried the BQ24050EVM?

Regards,

Mike Emanuel

0 Jim Teunis over 1 year ago in reply to Michael Emanuel35

Prodigy 20 points

Hello Mike,

Sure, I can send you the gerbers. What is the best way to do this?

I have not tried the EVM.

0 Michael Emanuel35 over 1 year ago in reply to Jim Teunis

TI__Mastermind 40575 points

Hi,

Just zip them and post them here. Please try the EVM.

Regards,

Mike Emanuel

0 Jim Teunis over 1 year ago in reply to Michael Emanuel35

Prodigy 20 points

Hi Mike,

This is a commercial board design, unfortunately I cannot just upload the Gerbers here or I will get in trouble.

Here's a screenshot of a part of the Gerbers where the component is placed.

I have just purchased the EVM for the ridiculous price of 100 USD.. however if that works I still don't know what is wrong with my design.

0 Michael Emanuel35 over 1 year ago in reply to Jim Teunis

TI__Mastermind 40575 points

Hello,

I cannot evaluate the layout if I do not know which pins are which and which components are which, let alone see all the layers. Using the EVM and seeing it working should give clues as how to improve the layout.

Regards,

Mike Emanuel

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BQ24050: does not charge