我输入电压为24V，Vturn-on 电压为20V。
This pin functions as both the PWM dimming input of the LEDs and as
an input UVLO with built-in hysteresis. When the pin voltage rises and exceeds the 1.276-V threshold, 21 μA
(typical) of current is driven out of the UDIM pin into the resistor divider (RUDIM1, RUDIM2) providing programmable
hysteresis
这意思是说当我UDIM电压低于1.276V IC进入保护模式还是其他意思？
