TPS92640: TPS92640 "Rcs" component thermal issue

Tool/software:

Hello

I am using TPS92640 IC and using analog dimming with IADJ terminal. (There is no PWM signal on UDIM terminal)

However, when operating with output current of 3A, Rcs(Sensing Resister) part temperature rises to over 130 degrees.

Other parts are around 50~80 degrees.

Please tell me how to lower the temperature of Rcs part.

[ Circuit ]

1. Rcs value: 0.08ohm x 1ea  (2512 size, 2W)

2. VIN : 24V

3. VLED Output voltage : about 21V

4. Output current : below 3A

5. L : 10uH

6. Cout: 100uF/50V

7. PCB : 1.6T, FR-4, 2-Layer

Best regards,

harold.