Driving apparatus of display device and DC-DC converter
View Patent ↗A DC-DC converter is provided, which includes a transformer including a primary coil and a secondary coil, a boost converter connected to the primary coil of the transformer and generating a first voltage, and a flyback converter connected to the secondary coil of the transformer and generating a second voltage.
1. A DC-DC converter comprising:
a transformer including a primary coil and a secondary coil;
a boost converter connected to the primary coil of the transformer and generating a first voltage; and
a flyback converter connected to the secondary coil of the transformer and generating a second voltage.
2. The DC-DC converter of claim 1 , wherein the boost converter comprises a first switching element connected to the primary coil of the transformer, an inductor connected in series with the first switching element, and a second switching element connectable in series with the inductor and the first switching element, and a capacitor.
3. The DC-DC converter of claim 2 , wherein the first switching element is a MOSFET (metal oxide silicon field effect transistor).
4. The DC-DC converter of claim 2 , wherein the second switching element is a MOSFET.
5. The DC-DC converter of claim 2 , wherein the boost converter further comprises a synchronous rectifier in series with the capacitor.
6. The DC-DC converter of claim 1 , wherein the flyback converter comprises a diode connected to the secondary coil of the transformer, a switching element connected to the diode, and a capacitor connected to the diode and the secondary coil.
7. The DC-DC converter of claim 6 , wherein the switching element is a synchronous rectifier.
8. A driving apparatus comprising:
a transformer including a primary coil and a secondary coil;
a boost converter connected to the primary coil of the transformer and generating a first output voltage;
a flyback converter connected to the secondary coil of the transformer and generating a second output voltage;
a first load supplied to the first output voltage; and
a second load supplied to the second output voltage.
9. The driving apparatus of claim 8 , wherein the boost converter comprises a first switching element connected to the primary coil of the transformer, an inductor connected in series with said first switching element, and a second switching element connectable in series with the inductor and the first switching element, and a capacitor.
10. The driving apparatus of claim 8 , wherein the first switching element is a MOSFET (metal oxide silicon field effect transistor).
11. The driving apparatus of claim 8 , wherein the second switching element is a MOSFET.
12. The driving apparatus of claim 8 , further comprising a synchronous rectifier in series with said capacitor.
13. A driving apparatus for a display device including a plurality of pixels, the apparatus comprising:
a voltage generator generating first and second output voltages;
a first load supplied with the first output voltage from the voltage generator; and
a second load supplied with the second output voltage from the voltage generator,
wherein the voltage generator comprises a transformer including a primary coil and a secondary coil, a first voltage generator connected to the primary coil of the transformer and generating the first output voltage, and a second voltage generator connected to the secondary coil of the transformer and generating the second output voltage.
14. The driving apparatus of claim 13 , wherein the first voltage generator is a boost converter.
15. The driving apparatus of claim 14 , wherein the first voltage generator comprises a first switching element connectable in series with the primary coil of the transformer, an inductor in series with said first switching element, a second switching element connected to the, primary coil of the transformer, and a capacitor connectable in parallel with said inductor and the first switching element, the first output voltage being produced across the capacitor.
16. The driving apparatus of claim 13 , wherein the second voltage generator is a flyback converter.
17. The driving apparatus of claim 16 , wherein the second converter comprises a diode connected to the secondary coil of the transformer, a switching element connected to the diode, and a capacitor connected to the diode and the secondary coil.
18. The driving apparatus of claim 13 , wherein the first load is a cooling fan.
19. The driving apparatus of claim 13 , wherein the second load is a microcomputer.