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1,disable DPS function,PWM have a phase
2,参考:e2e.ti.com/.../tps53679-increase-the-load-pwm-does-not-increase-the-output-phase
Hi yuchen;
You once replaced a new chip and find the operation is normal with three phases when disable DPS. just to check if there is a soldering problem.
so, with this new chip, how about the enable DPS, is it still one phase operation now?
1,with the new chip,in the mode of enable DSP,With increasing load, the number of PWM can be increased to three phases.
2,with the old chip(Suspected damaged chip),in the mode of disenable DSP,PWM has only one phase operation.
3,with the old chip(Suspected damaged chip),update FW of chip (TPS53679),in the mode of disenable DSP/enable DSP,PWM has only one phase operation
Hi Yuchen:
so, the are many reason why the chip is not ok, we can not tell you the exact reason, please ignore that . thanks!