Battery power supply circuit and power source with same

Abstract

The invention discloses a battery power supply circuit and a power source with the same. The battery power supply circuit comprises a delay module used to delay the transmission of an input voltage to an input control chip, an input control module used to transmit the input voltage to a voltage control module when a post-stage circuit is in a non-dormant mode, an input filter module used to filter the input voltage transmitted by the input control module to the voltage control module, the voltage control module used to boost the input voltage and output the boosted input voltage to the post-stage circuit through an output filter module when the input voltage transmitted by the input control module is lower than the voltage required by the post-stage circuit, and the output filter module used to filter an output voltage signal output by the voltage control module to the post-stage circuit. By adopting the battery power supply circuit and the power source of the invention, the static loss and standby loss of a booster circuit are reduced, the service time of batteries is prolonged, and the utilization rate of batteries is increased.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a battery power supply circuit and a power supply with the circuit. Background technique [0002] With the development of power electronics technology, the types and quantities of electronic products continue to increase, and the power supply sources in electronic products are also diverse. Among them, the power supply voltage design of electronic products powered by dry batteries will be affected by the discharge characteristics of the dry batteries. Due to the discharge characteristics of dry batteries, the voltage range is very wide. The power supply of a single dry battery is usually 0.9V-1.55V, and the corresponding voltage range of two batteries in series is 1.8V-3.1V. In the prior art, electronic product ICs cannot adapt to such a wide voltage range, and a boost circuit is usually used to boost the battery voltage to 3.3V to supply power for electronic products....

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Problems solved by technology

[0004] Electronic products powered by existing dry batteries use a boost circuit for power supply. The boost circuit loses a lot of energy from the battery, and when the entire circuit is in sleep mode, the converter in the boost circuit must maintain internal oscillations and so on. loss Iq; and usually the output of the boost loop cannot be completely shut down by itself, that is, the presence of the input voltage will be conducted to the output through the internal parasitic body diode, and all the integrated chips supplied by the output stage will also produce a large static loss

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