[ LM48560 ] Requirement on Cset

Kenichiro

Other Parts Discussed in Thread: LM48560

Hello expert,

My customer who uses LM48560 for several models, they are now revising their schematics to minimize size and cost. Here are the questions.

What is the max voltage at SET pin?

Is it same under Hardware mode and Software mode?

(We know ALC is only for software mode, though)

Currently they use 10V rated voltage cap for Cset, however if they can use 6.3V cap instead, some space can be saved.

Thank for your support.

Regards,

Ken

over 12 years ago

0 Don Dapkus over 12 years ago

TI__Guru**** 189401 points

Hi, Ken,

What VDD is your customer using?

Are they using X7R capacitors?

-d2

0 Kenichiro over 12 years ago in reply to Don Dapkus

Mastermind 9165 points

Hi Don,

Thank you for your reply. Here is the information.

Q: What VDD is your customer using?

They use Vbatt directly, so typical Vdd is 3.8V.

Then varying from 3.5V up to 4.2V.

Q: Are they using X7R capacitors?

Currently using 2.2uF(10V/X5R).

Hope this help your investigation.

Thanks,

Ken

0 Don Dapkus over 12 years ago in reply to Kenichiro

TI__Guru**** 189401 points

Hi, Ken,

It is okay from our side to change to a 6.3V cap, but the only issue will be it will have less capacitance than the 10V cap due to the change in capacitance with applied voltage. So, the AGC operation may be changed a little bit if they change the cap value. They might want to study this before they change the cap to see if it is ok for their application.

-d2

0 Kenichiro over 12 years ago in reply to Don Dapkus

Mastermind 9165 points

Hi Don,

Thank you so much!! I will consult with customer!

Regards,

Ken

Audio

Audio forum

[ LM48560 ] Requirement on Cset