Team, Below is the Schematic.
Experiment Setup:
Buck Mode
Scenario 1: (Vin >= 16V)
No load: Regulation is maintained @15V.
After it is turned ONN, Let's say after 1 Second, @Full load (1.22A), It doesn't lose regulation, Regulation is maintained @15V.
Scenario 2: When the load @Full load (1.22A) is connected, and then Vin is applied, the output is observed with Oscillations as seen in image below.
I Updated CC ( C118) to 10nF, Able to maintain regulation upto 0.5A.
Boost Mode
Scenario 1: (Vin =9V)
No load: Regulation is maintained @15V.
Scenario 2: @Full load (1.22A), Even after 1 second, doesn't maintain regulation, Below Oscillations are observed.
I Updated CC ( C118) to 10nF, Able to maintain regulation upto 0.5A.
Changing CC is recommended ?? or What More can be checked so that we can load up to 1.4A?
Also, what is the use of CDC pin? Will that help here?
Latest Updates 03/05/24:
Load current: 0.9A, it is regulating from 11.8V and above. 11.8V and less upto 9.8V, It loses regulation.
I tried changing Rcomp & Ccomp values. Combinations like 4.7nF & 27K, 6.8nF & 27K, 50k & 10nF. Cp is open.
for all above values, it doesn't lose regulation, the moment Input voltage is below 11.8, It is not regulating, we observe the above ripple type behavior.
