Other Parts Discussed in Thread: TPS54225 We are redesigning our TI EVM power delivery schematic and need an automotive qualified buck that passes CISPR25 L5 radiated emissions testing.
Input: 10V to 14V
Output: 5V at 0.05 to 2A
We are using the TPS54225…
Part Number: TPS54228 Other Parts Discussed in Thread: TPS54225 , Hi E2E,
How to calculate ON time pulse without Vout sense pin?
In TPS54225, we can find Vo sense pin in this chip, but no this pin in TPS54228.
As I know, ON time pulse is determined by Vou…
Other Parts Discussed in Thread: TPS54227 , TPS54225 Please let me know about soft start equation of TPS54227.
On the datasheet page-9, soft start equation is below.
※Tss(ms) = (C6 x Vref x 1.1) / Iss
I don't understand multiplied "1.1".
…
Other Parts Discussed in Thread: TPS54225 Hi Team,
I'd like to ask about TPS54225 (Dcap2 series) .
Our customer are trying to implement negative voltage in Buck-Boost Topology that uses the Buck converter.
Dcap2 can be a inverting circuit , such as in…
Hi John,
I also have 1 question about stability. From customer they use TPS54225 & additional circult to do high low margin vout. Attached schematic, FYR.
But when doing high low margin, the output will over 5%tolerance, we try do add highside FB…
Thanks for this quick reply. Is this specific to TPS54231 or is it more of a common issue with buck converters? I tested an older system of our using TPS54225 and also found a way too big peak at switching frequency.
Other Parts Discussed in Thread: TPS54225 Hi,
Figure 8 of TPS54225 datasheet shows the EFFICIENCY Vs OUTPUT CURRENT curves, but there is no information about the input voltage. Can somebody tell me the value of the input voltage used?
Regards,
Santho…
Other Parts Discussed in Thread: TPS54425 Hi,
Now our customer is evaluating TPS54425 with forward configuration.
Please see actual waveform in attached.
Is this operation right?
8345.TPS54425_.pdf
yusuke
