A boost type DC-DC converter circuit with automatic switching to low power consumption and undervoltage protection
A converter circuit and undervoltage protection technology, which is applied in the direction of output power conversion device, high-efficiency power electronic conversion, DC power input conversion to DC power output, etc., can solve the problems of reducing battery life, battery damage, battery over-discharge, etc.
Active Publication Date: 2017-05-31
KENNEDE ELECTRIONICS MFG CO LTD
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Problems solved by technology
[0004] Since the BOOST type DC-DC converters on the market have large standby power consumption and no undervoltage protection function, when the input power is a battery, if the battery is not charged for a long time, the power consumption of the circuit itself will easily cause the battery to over-discharge. The battery is damaged, so that the battery cannot be restored to use, or the continuous operation of the circuit may easily cause the battery to be over-discharged, all of which will greatly reduce the life of the battery
Overcoming standby power consumption and battery over-discharge in an environment of increasing battery usage presents a major design challenge
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[0014] The present invention will be described in further detail below in combination with specific embodiments.
[0015] In order for those skilled in the art to better understand the technical solutions provided by the present invention, the following will be described in conjunction with specific embodiments.
[0016] Please see attached figure 1 , the present invention mainly includes an undervoltage protection part, a DC-DC BOOST circuit, an automatic switching to low power consumption startup circuit, and automatically enters a low power consumption state and undervoltage protection through the automatic switching to low power consumption circuit, effectively solving the BOOST type standby power consumption Large or low voltage causes defective products. In this embodiment, when the circuit is connected to a load, the transistor Q3 is turned on, providing a high level for the EN pin of the chip to start the circuit. When the load is unplugged, the transistor Q3 is turne...
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The invention discloses a BOOST type DC-DC converter circuit with automatic switching to low power consumption and undervoltage protection, which is suitable for all BOOST type DC-DC converters in the market. When the load is connected, the circuit starts automatically. When the load is unplugged or the input voltage drops to the set value, the circuit will automatically enter the dormant state, and the power consumption of the whole machine is less than 10uA, which automatically enters the low power consumption state and undervoltage protection, effectively solving the problem of high power consumption or low voltage in BOOST type standby cause defective products.
Description
[0001] 【Technical field】 [0002] The invention belongs to the field of switching power supplies, in particular to a BOOST type DC-DC converter circuit with automatic switching to low power consumption and undervoltage protection. [0003] 【Background technique】 [0004] Since the BOOST DC-DC converters on the market have large standby power consumption and no under-voltage protection function, when the input power is a battery, if the battery is not charged for a long time, the power consumption of the circuit itself will easily cause the battery to over-discharge. The battery is damaged, so that the battery cannot be restored to use, or the continuous operation of the circuit may easily cause the battery to be over-discharged, all of which will greatly reduce the life of the battery. Overcoming standby power consumption and battery over-discharge in an environment of increasing battery usage presents a significant design challenge. [0005] 【Content of invention】 [0006] F...
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IPC IPC(8): H02M1/36H02M1/32
CPCH02M3/155H02M1/0032Y02B70/10
Inventor 田畴邱子建
Owner KENNEDE ELECTRIONICS MFG CO LTD