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US 2014/0210443 A1Published application
Dc-dc buck circuit
AssigneeSiemens Aktiengesellschaft
InventorYu Ye Liu
Life of this patent
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Abstract
A DC-DC Buck circuit has a DC input terminal, a DC output terminal, a ground terminal, an inductor, a capacitor, a sampling resistor, a PWM control chip and a DrMOS chip. The output of the driver pin of the PWM control chip is unrelated to the voltage between the inductor and the sampling resistor. The DC-DC Buck circuit can produce a larger output voltage while also being compatible with a DrMOS chip.
Claims8
A DC-DC Buck circuit, comprising:
- a DC input terminal;
- a DC output terminal;
- a ground terminal;
- an inductor between the DC input terminal and the DC output terminal;
- a capacitor between the DC output terminal and the ground terminal;
- a sampling resistor between the inductor and the DC output terminal;
- a PWM control chip, comprising at least one driver pin that supplies a PWM control signal;
- a DrMOS chip between the inductor and the DC input terminal, configured to drive conduction between the DC output terminal and the DC input terminal, and between the DC output terminal and the capacitor, or according to the PWM control signal, the DrMOS chip comprising a PWM pin that receives the PWM control signal;
- and
- the output of the driver pin being unrelated to the voltage between the inductor and the sampling resistor.
7 more elements
A multiphase DC-DC Buck circuit comprising:
- a plurality N of Buck circuits interleaved in parallel with each other;
- each of said N buck circuits comprising:
- a DC input terminal;
- a DC output terminal;
- a ground terminal;
- an inductor between the DC input terminal and the DC output terminal;
- a capacitor between the DC output terminal and the ground terminal;
- a sampling resistor between the inductor and the DC output terminal;
- a PWM control chip, comprising at least one driver pin that supplies a PWM control signal;
- a DrMOS chip between the inductor and the DC input terminal, configured to drive conduction between the DC output terminal and the DC input terminal, and between the DC output terminal and the capacitor, or according to the PWM control signal, the DrMOS chip comprising a PWM pin that receives the PWM control signal;
- and
- the output of the driver pin being unrelated to the voltage between the inductor and the sampling resistor.
9 more elements
Dependencies are inferred from the claim text.