 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AN2393 Datasheet(PDF) 11 Page - STMicroelectronics |
|
|
|||||||||||||||||||||||||||||
AN2393 Datasheet(HTML) 11 Page - STMicroelectronics |
|
|
11 / 35 page  AN2393 Electrical test results 11/35 Figure 6. Overall efficiency versus output power at several input voltage values 2.2 Resonant stage operating waveforms Figure 7 shows some waveforms during steady state operation of the resonant circuit at full load. The Ch3 waveform is the half-bridge square voltage on Pin 14 of L6599, driving the resonant circuit. In the picture it is not evident, but the switching frequency is normally slightly modulated following the PFC pre-regulator 100-Hz ripple that is rejected by the resonant control circuitry. The switching frequency has been selected approximately at 95-kHz in order to have a good trade off between transformer losses and dimensions. The Ch4 waveform represents the transformer primary current flowing into the resonant tank. As shown, it is almost sinusoidal because the operating frequency is close to the resonance of the leakage inductance of the transformer and the resonant capacitor (C28). In this condition, the circuit has a good margin for ZVS operation, providing good efficiency, 75.00% 76.00% 77.00% 78.00% 79.00% 80.00% 81.00% 82.00% 83.00% 84.00% 85.00% 86.00% 87.00% 88.00% 89.00% 90.00% 91.00% 92.00% 93.00% 94.00% 95.00% 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 Output power (W) eff% @90 Vac eff% @100 Vac eff% @115 Vac eff% @135 Vac 75.00% 76.00% 77.00% 78.00% 79.00% 80.00% 81.00% 82.00% 83.00% 84.00% 85.00% 86.00% 87.00% 88.00% 89.00% 90.00% 91.00% 92.00% 93.00% 94.00% 95.00% 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 Output power (W) eff% @170 Vac eff% @200 Vac eff% @230 Vac eff% @264 Vac |
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
