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US 2010/0302824 A1Published application
Power source apparatus
AssigneeSony Corporation
InventorTatsuki Nishino
Life of this patent
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Abstract
Disclosed herein is a power source apparatus utilizing a synchronous rectification system, including: a main transformer; a first field effect transistor; a second field effect transistor; and a gate driver.
Claims8
A power source apparatus utilizing a synchronous rectification system, comprising:
- a main transformer having a primary coil, and a first secondary coil and a second secondary coil having one end sides connected to each other through a tap mutually electromagnetically coupled to said primary coil;
- a first field effect transistor having a drain connected to the other end of said first secondary coil, a source connected to a reference electric potential, and a gate to which a first drive signal is supplied;
- a second field effect transistor having a drain connected to the other end of said second secondary coil, a source connected to the reference electric potential, and a gate to which a second drive signal is supplied;
- and
- a gate driver for generating the first drive signal and the second drive signal in accordance with a drain voltage of said first field effect transistor and a drain voltage of said second field effect transistor, for driving said first field effect transistor and said second field effect transistor in a complementary style, wherein
- said gate driver generates the first drive signal and the second drive signal in such a way that after the other field effect transistor of said first field effect transistor and said second field effect transistor is turned OFF at a moment at which a current is generated in one field effect transistor of said first field effect transistor and said second field effect transistor, the one field effect transistor is turned ON.
3 more elements
A power source apparatus, comprising:
- a first converter for converting an alternating current voltage into a first direct current voltage;
- and
- a second converter for converting the first direct current voltage obtained by said first converter into a second direct current voltage, said second comparator adopting a synchronous rectification system on a secondary side,
- said second comparator including
- a main transformer having a primary coil, and a first secondary coil and a second secondary coil having one end sides connected to each other through a tap mutually electromagnetically coupled to said primary coil,
- a first field effect transistor having a drain connected to the other end of said first secondary coil, a source connected to a reference electric potential, and a gate to which a first drive signal is supplied,
- a second field effect transistor having a drain connected to the other end of said second secondary coil, a source connected to the reference electric potential, and a gate to which a second drive signal is supplied, and
- a gate driver for generating the first drive signal and the second drive signal in accordance with a drain voltage of said first field effect transistor and a drain voltage of said second field effect transistor, thereby driving said first field effect transistor and said second field effect transistor in a complementary style, wherein
- said gate driver generates the first drive signal and the second drive signal in such a way that after the other field effect transistor of said first field effect transistor and said second field effect transistor is turned OFF at a moment at which a current is generated in one field effect transistor of said first field effect transistor and said second field effect transistor, the one field effect transistor is turned ON.
6 more elements
Dependencies are inferred from the claim text.