LMQ64480-Q1: Schematic review for customer.

Kunal Dhawan

Part Number: LMQ64480-Q1

Tool/software:

Hi Team,

Can you please help me in schematic review above buck for customer

The requirement is to step down from 24V to 12V with an output current of up to 4A (including margin).

PFB link for the schematics and calculation sheet for your review.

tidrive.ext.ti.com/.../46d56e53-883a-45c1-9070-827fb06bd44f

Password: qK7DHy4'

Thanks & Regards
Kunal Dhawan

1 month ago

0 Joshua Austria 1 month ago

TI__Mastermind 21085 points

Hi Kunal,

Can you please resend the files either as screenshots or the link again? It seems as if the link was truncated.

Thank you,

Joshua Austria

0 Kunal Dhawan 1 month ago in reply to Joshua Austria

TI__Intellectual 870 points

Hi Joshua,

Complete link:

https://tidrive.ext.ti.com/u/njxHHAM8RzeMPEc-/46d56e53-883a-45c1-9070-827fb06bd44f?l

0 Joshua Austria 1 month ago in reply to Kunal Dhawan

TI__Mastermind 21085 points

Hi Kunal,

Thank you. I will have a schematic review completed for you by next week.

Thank you,

Joshua Austria

0 Akhil K R 1 month ago in reply to Joshua Austria

Prodigy 30 points

Hi Joshua

Is there any comments on the schematics shared.

Looking forward to hear from you soon.

0 Joshua Austria 1 month ago in reply to Akhil K R

TI__Mastermind 21085 points

Hi Akhil,

I reviewed your schematic. Here are my comments:

Each of the input pins (VIN1 and VIN2) require a minimum of 10uF of effective ceramic capacitance. This capacitance needs to be placed close to the device pins.
I noticed that you have "capacitor banks" for input and output that are located on a separate schematic page than the device. Are these capacitors placed close to the device pins or are they further away at the devices downstream? If these are close, then this should be ok.
I have no other comments about this schematic. The rest of the schematic looks good.

Thank you,

Joshua Austria

0 Akhil K R 1 month ago in reply to Joshua Austria

Prodigy 30 points

Hi Joshua
Thanks for your comments, Yes we are planning to place the capacitors closer to the VIN1 and VIN2

0 Joshua Austria 1 month ago in reply to Akhil K R

TI__Mastermind 21085 points

Hi Akhil,

Sounds good.

How about the output capacitors? Are some of these also going to be placed close to the device? The calculator noted a minimum of ~6uF on output and this is key for both outputs.

Thank you,

Joshua Austria

0 Akhil K R 1 month ago in reply to Joshua Austria

Prodigy 30 points

Hi Joshua

Good Morning

Yes, we will place output capacitors near to the pin.

0 Joshua Austria 1 month ago in reply to Akhil K R

TI__Mastermind 21085 points

Hi Akhil,

Sounds good! This should be good then from a schematic perspective.

Thank you,

Joshua Austria

Power management

Power management forum

LMQ64480-Q1: Schematic review for customer.