LP8555: Output A+B

Jeff YANG

Part Number: LP8555
Other Parts Discussed in Thread: TPS92360, TPS61165

Hi,

LP8555 can connect two output A and output B together, provide total 12*40mA=480mA?

I have below 2+6 LED, but each channel need 60mA. But seems channel 1+ 3 + 5 total need 6*60mA=360mA. LP8555 output A or output B only support to maximum 5* 60mA = 300mA.

over 2 years ago

0 Frank Qiu over 2 years ago

TI__Genius 15776 points

Our expert is OoO , and the team will reply you within this week.

0 Hardy Wu over 2 years ago

TI__Genius 12915 points

Hi Jeff,

It seems that all strings paralleled together right? It is not recommended to parallel all channels together, since there would induce large parasitic inductance and influence the loop stability. I think you could choose one single channel device like TPS92360 or TPS61165, they can provide large current with one LED connection.

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LP8555: Output A+B