SSLV1.1 builds & fairy tales

[Salas]

15 AWG if you can

 

[merlin el mago]

Thank you.

 

[merlin el mago]

Local store only have 1.5mm² or 2.5mm², I bought 2.5mm² waiting SSLV1.1 PCB screw wire connector terminal block can handle the thickness

 

[Salas]

That's equivalent to 13 AWG 😎

 

[merlin el mago]

Yes, it's very thick, fitted🙂

I connected again at positive reg the main capacitor leg - to see what happens now, powered ON the reg and all LEDs lights without problem, time to listen.

 

[merlin el mago]

Works perfect.

 

[Salas]

Very nice. Maybe something wasn't making very good contact there before.

 

[merlin el mago]

Surely, a lot of wires: 8 wires in total for 2 regs.

Now is more neat and no problems grounding the mains reservoir capacitor.

 

[sbelyo]

Can someone check to see if this looks right? This is for SSL V1.1 +5VDC output

I have Teabag's mini kits so I have all the Q's and led's. If I understand the build doc correctly I only populate C302 and 304 if using film caps. Electrolytics C301, and 303 are not needed if not powering a clock. For R303 and 305 I have a 220 Ohm and a 100 Ohm trimmer. Is that correct? Below is the calc values and the mouser part list. Can someone do a sanity check?

Here's the mouser parts:

863-MUR120G MUR120G onsemi D311-314 Rectifiers 200V 1A UltraFast

71-CPF322R000FKE14 CPF322R000FKE14 Vishay R301 Metal Film Resistors - Through Hole 3watts 22ohms 1% 100ppm

652-3296Y-1-101LF 3296Y-1-101LF Bourns R305 Trimmer Resistors - Through Hole 3/8IN 100 OHM Sealed Vertical Adjust

71-RN60D2700F RN60D2700FB14 Vishay R302, 306 Metal Film Resistors - Through Hole 1/4watt 270ohms 1% 100ppm Non Std

505-MKS4C046804F00JF MKS4C046804F00JF00 WIMA C304, 302 Film Capacitors 6.8 uF 63 VDC 5%

660-MF1/4CL1R00F MF1/4CL1R00F KOA Speer R304, 307 Metal Film Resistors - Through Hole 1ohm 1% 50PPM

660-MF1/4CC47R0F MF1/4CC47R0F KOA Speer R308 Metal Film Resistors - Through Hole 47ohm 1% 50PPM

660-MF1/4CCT52R2200F MF1/4CCT52R2200F KOA Speer R303 Metal Film Resistors - Through Hole 1/4 WATT 220 OHM 1%

647-LLS1J472MELB LLS1J472MELB Nichicon C305 Aluminum Electrolytic Capacitors - Radial Leaded

 

[Salas]

Hi, you also populate R307 when using output film cap. The Calc sheet looks logical. Good luck.

 

[sbelyo]

Thanks Salas...

For R305 I have a 100 ohm trimmer since the calculator says I'll need 80 ohms there. Is that value ok?

 

[Salas]

It depends on how real will be the 4mA Q303 Vref current you calculate on. JFETs don't achieve datasheet IDSS when with low voltage across. Me I would just use a higher value trimmer so to have leeway. You can always bypass other components if the Vout target will be overachieved before trimmer contribution, like the 220R or one Vref area LED.

 

[sbelyo]

got it... I was on the fence with 100 Ohm vs 500 ohm. I'll go to 500 ohm

 

[sbelyo]

Will this heatsink work? https://www.mouser.com/ProductDetai...ons/ATS-PCB1069?qs=qSfuJ%2Bfl/d7n3/gxnbCcJA==

 

[merlin el mago]

No, the minimum as per your simulation is:

Q101 https://www.mouser.es/ProductDetail/Same-Sky/HSS-B20-NP-04?qs=u4fy/sgLU9OO1au2m7dGHw==
Q106 https://www.mouser.es/ProductDetail/Wakefield-Thermal/273-AB?qs=VVKQmw408U8yo6NoqeFpbg==

Of course you could use with less C/W that dissipates more heat.

 

[sbelyo]

Thanks Merlin...

I think I can make this one work https://www.mouser.com/ProductDetail/Wakefield-Thermal/273-AB?qs=VVKQmw408U8yo6NoqeFpbg==

 

[merlin el mago]

For Q106 yes. But you need the heatsing also for Q101 ok?

 

[sbelyo]

Ahh, I didn't catch you broke that down. Got it