关于LT3753和LT8311的配合问题

The front page of the datasheet says:

"In preactive mode, the output inductor current

operates in discontinuous conduction mode (DCM) at

light load. If forced continuous mode (FCM) operation is

desired at light load, the LT8311 can, alternatively, be used

in SYNC mode"

What you described is normal for DCM operation for a switching mode power supply (Please see page 18 of the datasheet).

If you prefer the FCM at light or no load, you can refer to this design.

https://www.analog.com/media/en/dsp-documentation/evaluation-kit-manuals/dc1994afa.pdf

我加了脉冲变压器，但是在轻载和空载的时候还是工作在间隙模式，https://www.analog.com/media/en/technical-documentation/eval-board-schematic/DC2175A-3-SCH.PDF，    大概和这个图差不多，只不过我没用T3，直接用的输出电压给LT8311的Vin供电，PMODE引脚和INTVCC引脚也直接连接的Vin，不知道这会有啥影响