Other Parts Discussed in Thread: LM5170
Hi Team,
My cusomter is using LM5170-Q1's SYNCOUT signal to provie external clock signal for the downstream LM5170-Q1, like the figure below(control 2-phase boost totally).
While the output load is increasing to heavy load, COMP and RAMP signals will become unstable.
CH1: COMP; CH2: VIN; CH3: RAMP
The SYNCIN and SYNC out signals of upstream LM5170-Q1 are both 120kHz.
CH1: SYNCIN; CH4: SYNCOUT
And if customer chooses to set the frequency of downstream LM5170-Q1 by its own OSC resistor, PSU can work nicely under heavy load condition.
Pls help to provide your insights of this issue, thanks.