TPS61040: LED Application with load disconnect

Fandy

Part Number: TPS61040
Other Parts Discussed in Thread: TPS61165

Hello

Does TPS61040 could support LED application with load disconnect refered Figure 17 circuit ? I simulate it by TINA, but it failed.

0 Minqi Zhao over 4 years ago

Hi Fandy,

Could you explain more about the failed result and post a simulation waveform result? Thanks.

0 Fandy over 4 years ago in reply to Minqi Zhao

Expert 2285 points

Hi Minqi,

simulate as below , Vout=VIN, no SW switching,no boost voltage, and current is also zero.

0 Fandy over 4 years ago in reply to Fandy

Expert 2285 points

Hello Minqi,

have any comment ?

0 Minqi Zhao over 4 years ago in reply to Fandy

Hi Fandy,

Could you upload your TINA simulation file so that I can debug based on your model? Thanks.

0 Fandy over 4 years ago in reply to Minqi Zhao

Expert 2285 points

Hi Minqi,

FYI

0 Fandy over 4 years ago in reply to Fandy

Expert 2285 points

Hi Minqi,

any update ?

Actually,My customer used TPS61165 refer to this circuit, and in the real debugging, the LEDs also doesn't lighting

0 Minqi Zhao over 4 years ago in reply to Fandy

Hi Fandy,

Your ground under R3 in the simulation schematic is disconnected to R3. After you connect it correctly, your simulation can run. Please have a try.

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