VIN ≥ Vf_LED x N + VDR + RVIN_VINRES x IOUTx_TOTAL [V]
where: VIN is the VIN pin voltage. Vf_LED is the LED forward voltage. N is the number of LED. VDR is the VINRES - OUTx drop voltage. RVIN_VINRES is the ON resistance between the VIN pin and the VINRES pin. IOUTx_TOTAL is the total output current.