TPS61196: TPS61196悬空通道导致输出一直上升直到保护的问题

您好

https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1637061/tps61196-tps61196-design-question?tisearch=e2e-sitesearch&keymatch=TPS61196#

请您参考这个帖子的建议

7.4.1.2 LED Open Protection When one of the LED strings is open, the voltage at the IFB pin connecting to this LED string drops to zero during dimming-on time. The TPS61196 monitors the IFB voltage for 20 ms. If the IFB voltage is still below the threshold of 0.2 V, the current sink is disabled and an internal pull-up current is activated to detect the IFB voltage again. If the IFB voltage is pulled up to a high voltage, this LED string is recognized as LED open. As a result, the device deactivates the open IFB pin and removes it from the voltage feedback loop. Afterwards, the output voltage returns to the voltage required for the connected LED strings. The IFB pin currents of the connected strings remain in regulation during this process. If all the LED strings are open, the TPS61196 is latched off.

或者参考这个建议，用外部控制来影响。