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US 12,587,098 B2Granted
Synchronous coupled boost circuit, boost circuit and power supply apparatus
AssigneeThinking Power Technology (Shenzhen) Limited
InventorZhenyuan Wu
Life of this patent
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Abstract
Disclosed are a synchronous coupled boost circuit, a boost circuit, and a power supply apparatus. In the synchronous coupled boost circuit, the source of the first upper transistor is connected to the non-dotted terminal of the first winding of the coupled inductor and the drain of the first lower transistor, the drain of the first upper transistor is connected to the power output terminal; the source of the second upper transistor is connected to the non-dotted terminal of the second winding of the coupled inductor and the drain of the second lower transistor, the drain of the second upper transistor is connected to the power output terminal; the source of the first lower transistor is grounded; and the source of the second lower transistor is grounded.
Claims19
A synchronous coupled boost circuit, comprising:
- a power input terminal and a power output terminal;
- a coupled inductor, comprising a first winding and a second winding, wherein dotted terminals of the first winding and the second winding are connected together as a common terminal, and the common terminal;
- the first winding and the second winding are on a same magnetic core and have a same number of turns is connected to the power input terminal;
- a first upper transistor, wherein a source of the first upper transistor is connected to a non-dotted terminal of the first winding of the coupled inductor, and a drain of the first upper transistor is connected to the power output terminal;
- a first lower transistor, wherein a drain of the first lower transistor is connected to the non-dotted terminal of the first winding of the coupled inductor, and a source of the first lower transistor is grounded;
- a second upper transistor, wherein a source of the second upper transistor is connected to a non-dotted terminal of the second winding of the coupled inductor, and a drain of the second upper transistor is connected to the power output terminal;
- and
- a second lower transistor, wherein a drain of the second lower transistor is connected to the non-dotted terminal of the second winding of the coupled inductor, and a source of the second lower transistor is grounded;
- wherein the first winding, the first upper transistor and the first lower transistor form a first boost branch;
- the second winding, the second upper transistor and the second lower transistor form a second boost branch;
- the first boost branch and the second boost branch operate alternately as a main power circuit;
- when the first boost branch operates as the main power circuit, the second lower transistor is turned on after the first lower transistor is turned on;
- and
- when the second boost branch operates as the main power circuit, the first lower transistor is turned on after the second lower transistor is turned on;
- when the second boost branch operates as the main power circuit, and a main current is conducted from the source to the drain in the second upper transistor, a switching frequency and turn-on of the first upper transistor are controlled to ensure that the current in the first upper transistor changes from flowing from the source to the drain at the start of conduction to flowing from the drain to the source at the start of turn-off;
- and
- when the first boost branch operates as the main power circuit, the main current is conducted from the source to the drain in the first upper transistor, a switching frequency and turn-on of the second upper transistor are controlled to ensure that the current in the second upper transistor changes from flowing from the source to the drain at the start of conduction to flowing from the drain to the source at the start of turn-off.
14 more elements
A synchronous coupled boost circuit, comprising:
- a power input terminal and a power output terminal;
- a coupled inductor, comprising a first winding and a second winding, wherein dotted terminals of the first winding and the second winding are connected together as a common terminal, and the common terminal;
- the first winding and the second winding are on a same magnetic core and have a same number of turns is connected to the power input terminal;
- a first upper transistor, wherein a source of the first upper transistor is connected to a non-dotted terminal of the first winding of the coupled inductor, and a drain of the first upper transistor is connected to the power output terminal;
- a first lower transistor, wherein a drain of the first lower transistor is connected to the non-dotted terminal of the first winding of the coupled inductor, and a source of the first lower transistor is grounded;
- a second upper transistor, wherein a source of the second upper transistor is connected to a non-dotted terminal of the second winding of the coupled inductor, and a drain of the second upper transistor is connected to the power output terminal;
- and
- a second lower transistor, wherein a drain of the second lower transistor is connected to the non-dotted terminal of the second winding of the coupled inductor, and a source of the second lower transistor is grounded;
- wherein the first winding, the first upper transistor and the first lower transistor form a first boost branch;
- the second winding, the second upper transistor and the second lower transistor form a second boost branch;
- the first boost branch and the second boost branch operate alternately as a main power circuit;
- when the first boost branch operates as the main power circuit, the second lower transistor is turned on after the first lower tansistor is turned on;
- and
- when the second boost branch operates as the main power circuit, the first lower transistor is turned on after the second lower transistor is turned on;
- when the second boost branch operates as the main power circuit, a main current is conducted from the drain to the source in the second lower transistor and the second lower transistor remains an on-state, a switching frequency and turn-on of the first lower transistor are controlled to ensure that the current in the first lower transistor changes from flowing from the source to the drain at the start of conduction to flowing from the drain to the source at the start of turn-off;
- and
- when the first boost branch operates as the main power circuit, the main current is conducted from the drain to the source in the first lower transistor and the first lower transistor remains an on-state, a switching frequency and turn-on of the second lower transistor are controlled to ensure that the current in the second lower transistor changes from flowing from the source to the drain at the start of conduction to flowing from the drain to the source at the start of turn-off.
14 more elements
A synchronous coupled boost circuit, comprising:
- a power input terminal and a power output terminal;
- a coupled inductor, comprising a first winding and a second winding, wherein dotted terminals of the first winding and the second winding are connected together as a common terminal, and the common terminal;
- the first winding and the second winding are on a same magnetic core and have a same number of turns is connected to the power input terminal;
- a first upper transistor, wherein a source of the first upper transistor is connected to a non-dotted terminal of the first winding of the coupled inductor, and a drain of the first upper transistor is connected to the power output terminal;
- a first lower transistor, wherein a drain of the first lower transistor is connected to the non-dotted terminal of the first winding of the coupled inductor, and a source of the first lower transistor is grounded;
- a second upper transistor, wherein a source of the second upper transistor is connected to a non-dotted terminal of the second winding of the coupled inductor, and a drain of the second upper transistor is connected to the power output terminal;
- and
- a second lower transistor, wherein a drain of the second lower transistor is connected to the non-dotted terminal of the second winding of the coupled inductor, and a source of the second lower transistor is grounded;
- wherein the first winding, the first upper transistor and the first lower transistor form a first boost branch;
- the second winding, the second upper transistor and the second lower transistor form a second boost branch;
- the first boost branch and the second boost branch operate alternately as a main power circuit;
- when the first boost branch operates as the main power circuit, the second lower transistor is turned on after the first lower transistor is turned on;
- and
- when the second boost branch operates as the main power circuit, the first lower transistor is turned on after the second lower transistor is turned on;
- switching frequencies of the first lower transistor and the second lower transistor are controlled to ensure that a dropping value fluctuation range of an input ripple current in the coupled inductor does not exceed 50%;
- or,
- the switching frequencies of the first lower transistor and the second lower transistor are controlled to ensure that an absolute difference value between a maximum value and a minimum value of a dropping value of the input ripple current in the coupled inductor does not exceed 5 A.
14 more elements
Dependencies are inferred from the claim text.