Repair of a LED bar, help identifying IC

[Snake____1]

Hello,

I am trying to repair a LED bar, but one of two LED buck converters have failed.

I have worked my google fu, but cannot find anything on the markings of the IC. Is anyone able to identify the SOIC8 buck converter used to drive the LEDs?

Markings are:
TS18D
1817

[fzabkar]

"1817" appears to be a date code.

This URL has a similar IC with a "1713" date code:

http://lantorino.com/en/para-led-bar-5-djujmov/

Can you trace out a circuit diagram for the IC? Does it have an integrated MOSFET?

[Snake____1]

"1817" appears to be a date code.

This URL has a similar IC with a "1713" date code:

http://lantorino.com/en/para-led-bar-5-djujmov/

Very interesting. It has the exact same construction as mine, although mine has 42 LEDs. Where 18 are driven by one of the buck controllers and 24 are driven  by the other.
One bank is dead, the other one lights up. Switched over between the two controllers and the dead bank followed the controller.

Interested if anyone knows of a replacement...

[fzabkar]

I was searching for a datasheet which contained "0.091". That appears to be the current sense resistor (on pin #5 ?). This turned up some Richtek and Powtech ICs.

I'm wondering whether this design is another one of those where the Chinese have copied a popular IC. Can you at least identify the ground, Vcc and SW (inductor output) pins?

[Snake____1]

I was searching for a datasheet which contained "0.091". That appears to be the current sense resistor (on pin #5 ?). This turned up some Richtek and Powtech ICs.

I'm wondering whether this design is another one of those where the Chinese have copied a popular IC. Can you at least identify the ground, Vcc and SW (inductor output) pins?

As far as I can see and measure:
PAD and 5 is connected to the inductor. inductor to LED cathodes.
6 to sense resistor. sense resistor to VSS.