Trying to achieve 12V DC at 360mA in LNK306DN-Based Circuit
I am attempting to create a circuit that can supply at least 12V DC and a current of 360mA or more. Currently, I am using a reference schematic for the LNK306DN, which is providing only 12V at 120mA. My goal is to achieve a 12V DC output with a current rating of 360mA. Please help me to achieve this with LNK306DN.
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Attachment | 大小 |
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Reference Schematics | 50.88 KB |
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Hi,
Thank you for using PI-Forums.
attach is a PIXLS for design. you can download it:
step1. right click then choose save link as then save.
step 2. open you PIEXPERT then Choose Open Design.
step 3. Upload the file to view the specs.
the design uses a LNK32x8 with reduced Current limit (Cbp = 1uF).
for L1 I based the specs from SRR7045-331.
for input Caps. you can search from AISHI. we have a cap from them the 10uf 400v that is 13.35mm in height.
regards,
Sigris
Attachment | 大小 |
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LinkSwitch-TN2 Buck Design4_12V 360mA.pixls | 21 KB |
I would appreciate it if you could review the attached schematics. unfortunately, I'm not achieving the desired output. I was expecting an output of 12 volts and 360mA, but I am only getting around 5 volts. I kindly request your assistance in addressing this issue.
Regards,
Ashiq k
+917034468209
Attachment | 大小 |
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Screenshot 2023-10-09 143046_0.png | 32.73 KB |
I would appreciate it if you could review the attached schematics. unfortunately, I'm not achieving the desired output. I was expecting an output of 12 volts and 360mA, but I am only getting around 5 volts. I kindly request your assistance in addressing this issue.
Regards,
Ashiq k
+917034468209
Attachment | 大小 |
---|---|
Screenshot 2023-10-09 143046_0.png | 32.73 KB |
Hi,
Thank you for using PI-Forums.
base on your schematic, your design is very similar on the reference design. so it should work. you can add a 10 ohm resistor in series at c23. to make a rc filter to filter out unwanted noise on fb pin.
Fb pin ref Voltage is 2V. using voltage divider. 2V = Vout * (2.49kohms/(2.49kohm+11.8kohm)) >> Vout = 11.4779 V.
did you build the circuit or is it on simulation?
we also have a RDR-912 which has 12V and 550mA output it uses a lnk3207 and closer to your desired output.
rdr-912_non-isolated_buck_converter_small_appliances_linkswitch-tn2.pdf (power.com).
regards,
Sigris.
Dear Ezekiel,
I've made my part number selections based on your recommendations. Kindly review them to ensure they are suitable:
Thank you for your assistance.