Hey Lupita,
To clear something up are you looking for a commercial grade part, an automotive grade part, an enhanced product grade part, military grade part, or space grade part.
I ask this because the UC1843 is a very old part and newer parts have…
Part Number: UC1843 Other Parts Discussed in Thread: TL494 Is there a UCx84x Current-Mode PWM Controller-like IC that brings out the error amplifier's non-inverting pin so that the user can supply his own reference to that pin? I would like to connect…
Part Number: UC1843 How do I calculate the soft start timing? I followed the soft-start circuitry on figure 22 and is seeing some delay but I want know how to correctly calculate it.
www.ti.com/.../detailed-description
Part Number: UC1843-SP Hello, for this part:
5962-8670402VXA
I would like to know:
mass
Junction to case thermal resistance
Heat sinking side (top/bottom)
Thank you.
Aidan Watson
Part Number: UC1843-HIREL Good Afternoo,
Please help us understand what the class type for both the 5962-8773901XA and 5962-8680601EA is?
The DLA drawing allows for either device Class M or Q and without the third digit in the suffix present, I cannot…
Hi Richard,
RT/CT pin for UC1843 runs off of 5V reference that is generated internally on the IC. Thus the voltage on RT pin must be limited to Vref pin rating + 0.3V . Thus RT pin should be limited to 5.1V +0.3V =5.4V max.
.
Part Number: UC1843A Hello,
In the frame of a space appplication (Exomars2020 mission), we have selected this référence : UC1843J883B (5962-8670402PA) in CDIP-8 package.
The maximum absolute rating (following the datasheet) is 30V. The question is…
Hi Peter,
Many thanks for the response. We are at about 100kHz sync frequency and free-running spec is at about 11% (worst-case) below the sync freq over temperature. Just wanted make sure.
Regards,
Robin
No gate driver operation. Anyone have any ideas?
Controller was operating with fairly large capacitor on VCC, 22uF. Attempted reducing size to reduce delay time to start. Now, after VCC rises to UVLO turn ON level of 8.4V, oscillator starts but no gate…
