TPS2660: UV/OV derating

Brian Wang0928

Part Number: TPS2660
Other Parts Discussed in Thread: TPS2662, TPS2663,

Tool/software:

Customer is looking for UV/OV protector with SIL3 level. The voltage derating of the UVLO and OVP pin shall be higher than 60V.

It looks that TPS2662 doesn't meet it. Is there any alternative solution?

Conditions: 12Vin, 250mA. Derating >=60V

over 1 year ago

0 Rakesh over 1 year ago

TI__Guru** 105361 points

Hi Brian,

Please refer TPS2660, TPS2663. UVLO pin is high voltage pin in these devices.

Generally, in some devices we design UVLO pin rated for higher voltage to enable direct connection to IN. But, OVP pin always low voltage pin.

Can they use resistive ladder or local Zener on OVP to meet their requirement ?

BR,

Rakesh

0 Brian Wang0928 over 1 year ago in reply to Rakesh

TI__Genius 14080 points

Thanks.

Customer thinks the workaround you suggested is not good to convince TUV engineering. What competition device customer is interested in is MAX17608. in which it would be a better one solution. Does TI have similar one to compete without workaround? thanks.

0 Rakesh over 1 year ago in reply to Brian Wang0928

TI__Guru** 105361 points

Unfortunately, we don't have device with OV pin high voltage rating.

BR,

Rakesh

0 Brian Wang0928 over 1 year ago in reply to Rakesh

TI__Genius 14080 points

Got it. Thanks.

0 Brian Wang0928 over 1 year ago in reply to Brian Wang0928

TI__Genius 14080 points

Hello Rakesh,

Since TUV SIL3 requirements, the 65V derating is needed on the OV pin. I'm not sure if you are aware of this matter and improve on the next Gen eFuse?

Regards

Brian

0 Rakesh over 1 year ago in reply to Brian Wang0928

TI__Guru** 105361 points

Hi Brian,

Is it to address any single point of failures (such as shorting R3) on the resistive ladder connected to OV pin ?

BR,

Rakesh

0 Brian Wang0928 over 1 year ago in reply to Rakesh

TI__Genius 14080 points

I think it is kind of fault at OV pin.

In the d/s, it specifics the 5V only.

Regards

Brian

0 Rakesh over 1 year ago in reply to Brian Wang0928

TI__Guru** 105361 points

ok. we will take it into consideration during next Gen eFuse definition.

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TPS2660: UV/OV derating