Hi Team,
My customer, would like to modify a current design in order to match with new requirements
They have actually realized a 24V-> 9V DC/DC converter using the circuit LM3150 MHX. This supply works, but could be advantageously optimized : it supplies now 2 Amperes and they think it is possible to optimize the design in order to produce 5A continuous, and some overcurrent peaks that can reach 10 Amperes.
Please find attached the actual scheme and the associated bill of material.
This circuit is used to supply a digital camera, containing its own DC/DC converter. Now, their converter with LM3150MHX is polarized around 10 V in order to supply 9V when loaded.
I send to you two pictures that represent the current consumed by the digital camera :
1) "Power-up_oscillogram.jpg" shows the current (green) and the voltage (blue) at power-up of the digital camera. The digital camera is connected via a relay. A first current peak that reaches 6.6 A is first observed. This is due to the internal DCDC converter of the digital camera that is both capacitive and inductive. A second peak is observed, probably due to the fact that the digital camera DCDC converter triggers its internal protection and restarts immediately after.
They need our DC/DC converter to be robust to these current peaks.
2) "Current_peak_oscillogram_during_photo_taking.jpg" shows the current behavior (in purple) when during photo taking with the camera. This current peak reaches 5.7 A.
In their design, they would like to use the pin "Enable" of the LM3150MHX to power-up the digital camera, instead of a relay. In the attached scheme, the "Enable" pin is driven for this purpose.
In order to optimize their design in terms of output current, they would like to know our design recommendations (reference design) in terms of components references, placement and routing.
Thanks you in advance for your help.
Regards,
Pol
