It ran fine for ages - I turned my back to do some calcs and the thing bzzt'ed at me. Now, the negative rail is exactly -36 but although the transformer winding is symmetrical, the positive rail is 10 volts lower. (Don't trust Chinese parts! Even a simple coil!!) The transformer HISS decreased drastically and with a load connected to outputs, it disappears completely. Last night before changing the feedback circuitry, I noticed that the output coils were 47uH instead of 20! So I replaced them and output voltage came up. Submissions must be related to the discussion of digital piracy. Will investigate further tomorrow wrt all the drive waveforms. Maybe insufficient bootstrap C? Was looking at this last thing today. Looking closely I'm seeing the high side drive terminate prematurely under circumstances I have yet to exactly determine the cause of. Hi KX36 maybe my simulation is not good enough, i just want to show that one way to overcome the noise(vibration) of the transformer is by eliminating pulse skipping I've never been able to successfully use an internal error amplifier (SG3525 or TL494) without causing pulse skipping, I need to learn more You need to be careful with terminology here. Hi kooroshi60, any update from your project? I am happy to hear good news from you. (ExcellentIT calculations) I expected everything to run smoothly but after running it, all I get in the secondary output is +/- 2 volts!! Also the transformer makes an unpleasant noise.

So, I used a 36v zener and as for turns ratio, (Primary 26 turns of 1.7mm ) and (Secondary 2X4 turns of.7mmX5) are my winding. The only difference is that I adjusted the circuit for +36/-36 volts.

I built it using the exact same parts written in the schematic. Hello everyone, I made a 50Khz SMPS using the schematic I have attached to my message. So, this pin is usually held low with a pull-down resistor. This pin should not be left floating as it could pick up noise and cause problems. So, when quick shutdown is required, a high signal must be applied to pin 10.

However, this is not as quick as using the shutdown pin. The laptop charger is assumed to be smps-based so first stage is usually rectification? I am using SG3525 and IR2110. This SMPS is capable of delivering 864W of power when ETD59 core is used. SG3525 IR2110 50Khz 900W SMPS Question Hello everyone, I made a 50Khz SMPS using the schematic I have attached to my message. So I have two identical half bridge smps, each uses two mosfets and one IR2110 which drives the mosftets, both IR2110 are powered from a single small transformer and rectifier/voltage regulator.

Sg3525 ir2110 smps rarest