[SI-LIST] Re: Switcher Efficiency Optimization
- From: "Stefan Milnor" <stefan.milnor@xxxxxxxxxxxxxx>
- To: <joel@xxxxxxxxxx>, <Tayyab_Pathan@xxxxxxxxxxx>
- Date: Mon, 30 Jul 2012 09:27:32 -0700
As do all the major vendors - TI, Intersil, Semtech, International
Rectifier etc. This is a common feature. Getting it to work well (with a
seemless transition between modes) can sometimes be tricky though.
What is the proper list forum for these kinds of questions?
- Stefan
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Joel Brown
Sent: Monday, July 30, 2012 8:48 AM
To: Tayyab_Pathan@xxxxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Switcher Efficiency Optimization
Suggest you look at Linear Technology. They have parts that operate in
burst or pulse skipping mode.
Joel
On Mon, Jul 30, 2012 at 6:36 AM, Rose, Michael
<mrose@xxxxxxxxxxxxxxxxx>wrote:
> Tayyab, There's not much that can be done to improve the TPS54521
> light load efficiency. You might look at a buck regulator that
> implements pulse skipping or burst mode operation at low output loads.
>
> Mike
>
> ________________________________________
> From: si-list-bounce@xxxxxxxxxxxxx [si-list-bounce@xxxxxxxxxxxxx] on
> behalf of Tayyab Rahimkhan Pathan [Tayyab_Pathan@xxxxxxxxxxx]
> Sent: Monday, July 30, 2012 3:10 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Switcher Efficiency Optimization
>
> SI Experts,
> I am not sure if this is the correct forum to ask Power Supply related
> query but if anyone has experience pls share the knowledge.
>
> We have designed a Tab like system for security application. We are
> now trying to optimize the battery backup time by reducing the overall
> sleep current. Since we have used Switchers for 12V to 5V and 3V3
> supply generation, in sleep mode (low load) the efficiency of
> switchers is very poor (<50%, I know for light loads the efficiency
> will be poor) because of which our sleep current target is not met.
>
> My query is how to optimize the light load (<20mA) efficiency of buck
> synchronous switcher (P/N TPS54521)?
>
> Regards,
> Tayyab
>
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