Mobile power source control chip and mobile power source with same
A mobile power supply and control chip technology, which is applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of increasing the manufacturing cost of mobile power supply and the structural complexity of mobile power supply, and achieve simple manufacturing costs, simplify manufacturing processes, and reduce manufacturing. cost effect
Active Publication Date: 2015-05-06
SHENZHEN FM ELECTRONICS GRP CO LTD
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Problems solved by technology
Although figure 2 The load detection method of the circuit shown is fast, simple and accurate, but the additional switch MOS transistor NM1, detection resistor R1 and two port control terminals Cg and detection terminal Ts increase the manufacturing cost of the mobile power supply and the complexity of the mobile power supply structure
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[0024] Below, the present invention will be described in detail with reference to the accompanying drawings.
[0025]In the embodiments of the present invention, the parasitic diode characteristics of Schottky diodes or MOS tubes are effectively utilized, and a detection and control circuit for the boost module is added to the mobile power supply control chip, so that the mobile power supply has a load detection function. The detection control circuit simplifies the structure of the mobile power supply and reduces the manufacturing cost of the mobile power supply.
[0026] To improve the accuracy of judging the voltage drop of Schottky diodes, three measures are taken: one is to generate a reference voltage with zero temperature coefficient; the other is to use a low offset comparator; the third is to increase the voltage drop of Schottky diodes. Among them, the reference voltage with zero temperature coefficient and low offset comparator can be easily realized, and for increa...
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The invention provides a mobile power source control chip and a mobile power source with the same. The mobile power source control chip comprises a charging module, a booster module, a switch tube and a detection control circuit, wherein the detection control circuit comprises a standby control module, a control circuit, a reference voltage source, a comparator and a trigger connected with the comparator, and the mobile power source comprises the mobile power source control chip, a rechargeable battery, an inductor L, and an SBD. One end of the inductor L and one end of the SBD are connected with the rechargeable battery, and the other end of the inductor L and the other end of the SBD are connected with the output end Vout of the mobile power source control chip, wherein the inductor L and the SBD are mutually connected in series. The switch end LX is connected between the inductor L and the SBD. According to the mobile power source control chip and the mobile power source, the mobile power source has the no-load standby and load access detection functions by adding the charging module and the detection control circuit of the booster module. The mobile power source has the no-load standby and load access detection functions, the structure of the mobile power source is simplified, and the manufacturing cost of the mobile power source is reduced.
Description
technical field [0001] The invention relates to the technical field of mobile power supplies, in particular to a mobile power supply control chip capable of detecting load access and a mobile power supply using the chip. Background technique [0002] Since the mobile power supply can charge its external load, the mobile power supply has a charging function and a boost function. The charging function refers to charging its internal battery, and the boost function means that the load can be charged only after the mobile power supply is boosted. . In addition, some mobile power supplies also have a load detection function. For a mobile power supply with a load detection function, when the load is not connected, the boost function is not enabled, which has the advantages of low power consumption and long use time on a single charge. A mobile power supply without load detection function, even if there is no load connected, its boost function is always enabled, high power consump...
Claims
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IPC IPC(8): H02J7/00
Inventor 李科举
Owner SHENZHEN FM ELECTRONICS GRP CO LTD