Activity for kellogs
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #289797 | Initial revision | — | 7 months ago |
| Question | — |
derating MLCC ripple current for transient current spikes This graph - MLCC temperature rise vs ripple current RMS & frequency Imagealttext If I had a 10 us current spike every 100 000 us (akin to a half-sine wave and then the rest of 9999 sine waves missing), how much higher can i go in current ripple RMS value for the 20 deg. C max temp rise ? (more) |
— | 7 months ago |
| Edit | Post #289528 |
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— | 8 months ago |
| Edit | Post #289528 |
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— | 8 months ago |
| Edit | Post #289528 |
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— | 8 months ago |
| Edit | Post #289528 | Initial revision | — | 8 months ago |
| Question | — |
Power switches and automotive load dump, unclamped Power switches used in automotive are usually rated to withstand clamped load dump events, of the 35 - 40 V peak variety. AFAICT there are two main clamping mechanisms - first one for the logic part and second one for the MOSFET DS channel within. These power switches will generally (re)open the DS c... (more) |
— | 8 months ago |
| Edit | Post #289205 |
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— | 9 months ago |
| Comment | Post #289209 |
And among the dozen features the second circuit has there is also "Circuit breaker function for severe overcurrent events". I was wondering if I could use two back to back mosfets instead of only one and still have this feature functional. Seems reasonable to me that I could, but I am not so advanced... (more) |
— | 9 months ago |
| Edit | Post #289205 | Initial revision | — | 9 months ago |
| Question | — |
Two way circuit breaking capability for ideal diode controllers I would like to save some costs with ideal diode controllers. Basic requirement is for the diode controller to block overcurrents (short circuits) in both directions. The MAX16141A IC can do it and the datasheet openly discusses it, i.e with two back to back MOSFETs and a sense resistor Thie ... (more) |
— | 9 months ago |
| Comment | Post #288874 |
Got it, thank you! (more) |
— | 10 months ago |
| Comment | Post #288874 |
3 votes down are quite a few, why that I wonder... (more) |
— | 10 months ago |
| Edit | Post #288874 | Initial revision | — | 10 months ago |
| Question | — |
Floating circuitry and diodes In both cases, is the "X" point floating when there is no 12V applied ? (more) |
— | 10 months ago |
| Edit | Post #288404 |
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— | 11 months ago |
| Edit | Post #288404 | Initial revision | — | 11 months ago |
| Question | — |
Variant of a Mosfet's Gate-Source protection Let's say a 100V voltage spike arrives at +12V and the TVS diode clamps it to 25V. Q2 may or may not be activated. Will this circuit ensure a Vgs lower than 25V for the mosfet Q1 ? Any catch to it ? Imagealttext Thanks (more) |
— | 11 months ago |
| Comment | Post #288163 |
@Lundin I shall add some caps, thank you. Do the resistor values still matter if B, T signal frequencies are in the sub-Hz range ? (more) |
— | 11 months ago |
| Comment | Post #288183 |
> Be ESD aware and do not power up with any voltage on any pins > 0.5V (Latchup failure)
Not sure what to make of it. How would one test a circuit without applying power to any pins ? (more) |
— | 11 months ago |
| Edit | Post #288163 |
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— | 11 months ago |
| Comment | Post #288163 |
@#8176 This is meant to be used on a 12V vehicle. TVS diodes for a bit of protection, gate is pulled down by design. Which voltages aside from the ones in main question ? (more) |
— | 11 months ago |
| Comment | Post #288163 |
Updated, thank you (more) |
— | 11 months ago |
| Comment | Post #288163 |
Updated, thank you (more) |
— | 11 months ago |
| Edit | Post #288163 |
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— | 11 months ago |
| Edit | Post #288163 |
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— | 11 months ago |
| Edit | Post #288163 |
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— | 11 months ago |
| Edit | Post #288163 | Initial revision | — | 11 months ago |
| Question | — |
what should the output be for this use case of the CD4047 chip? Hello, I am trying to use a `CD4047` in monostable, positive-edge trigger mode: Image alt text Image alt text I am not skilled enough to make out what the output, i.e. pin 10, should be when pin 8, the input, is held at 0V (0.1V for some reason). Would expect it to be 0V, I am getting Vdd in... (more) |
— | 11 months ago |
| Edit | Post #288118 | Initial revision | — | 12 months ago |
| Question | — |
MOSFET protection with TVS: at the source pin or at the drain pin In the auotmotive context, does it matter where the fat load-dump grade diode is placed in relation to the MOSFET so as to protect it from both fast positive transients and the longer load dump ? Thank you (more) |
— | 12 months ago |