UC2525 Designed smps switching power supply contains corrector pfc power factor and switching push-pull converter involved in a half-bridge. PFC The control circuit for the corrector power factor was chosen MC34262 The involvement of this circuit in the design corresponds to the wiring shown in the data sheet. During the operation of the control circuit powered by an auxiliary winding, the coils of the corrector power factor.
Coil corrector power factor is wound on the core ETD29 with an air gap. The main winding coil has NP = 55 turns and is wound a high-frequency cable. The first the auxiliary winding are used to detect the zero current of the main winding coil and to the power supply circuit MC34262. The second auxiliary winding is used to provide power the control circuit UC2525
UC2525 SMPS Circuit
For the control of the converter connected to a half bridge is used an integrated circuit UC2525 The internal circuit is in figure 3.2. Since this circuit is located on the the secondary side of the source, is its power supply after turning on the power to ensure the auxiliary winding the coils of the corrector power factor T3
After several iterations, was selected the core of ETD39. The primary winding N1 will have 38 turns, a secondary winding (42 In) N2 14 turns and the second secondary winding N3 6 turns. For this number of turns is based on the inductance of the winding L1 = 3899 µH, L2 = 529 µH and L3 = 97,2 µH. The winding N1 will be wound three-wire with a diameter of 0.5 mm, the N2 four-wire with a diameter of 0.65 mm and a winding N3 one conductor with a diameter of 0.5 mm. For these averages wires would average current density should not exceed 3 a/mm2. Windings N1 and N2 are wound of multiple conductors of smaller diameter to be scaled effect of the surface currents.
PFC 300W Smps circuit pcb schematic all files alternative links:
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Published: 2016/06/09 Tags: power electronic projects, smps circuits, smps projects, smps schematic
2.1 Class D Amplifier Circuit TPA3116D2 TPA3118D2 Subwoofer
The power output stage in class D amplifier is implemented using two integrated circuits from the company Texas Instruments – TPA3118D2 for the right and left channel and the TPA3116D2 for the channel of the subwoofer. Stereo channels delivering maximum power output 2×30W into loads of 8 Ω and a subwoofer 100W to a load of 2 Ω.
42V 300W Schaltnetzteil UC2525 MC34262 Leistungsfaktorkorrektur
UC2525 Entwickelt smps Schaltnetzteil enthält Korrektor Leistungsfaktorkorrektur PFC Leistungsfaktor-und switching push-pull-Konverter eingebunden in eine halb-Brücke. Leistungsfaktorkorrektur-Steuerschaltung PFC wurde gewählt, MC34262 Die Einbindung der Schaltung in das design entspricht Schaltplan gezeigt in das Datenblatt. Während des Betriebs der Steuerschaltung angetrieben durch eine zusätzliche Wicklung, die Windungen des Leistungsfaktorkorrektur.
Coil Leistungsfaktorkorrektur ist die Wunde auf der ETD29-Kern mit einem Luftspalt. Die Haupt-Wicklung Spule hat NP = 55 umdrehungen und ist Wunde ein Hochfrequenz-Kabel. Die ersten die hilfswicklungen zur Erkennung der zero-current of the main winding coil-und der Netzteil-Schaltung MC34262. Der zweite Hilfs-Wicklung ist zur Stromversorgung der Steuerschaltung UC2525