Voltage-stabilizing circuit and charging micro-control integrated circuit embedded with the same
A technology of integrated circuits and voltage regulator circuits, applied in the field of charging micro-control integrated circuits, can solve the problems of high cost, low circuit integration, and many parts, etc.
Inactive Publication Date: 2009-08-05
GENERALPLUS TECH INC
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Problems solved by technology
Due to the low level of integration of this circuit, more parts are required, resulting in higher cost. Therefore, many system manufacturers complain that the production cost is too high, and hope that the production yield rate can be further improved.
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Embodiment Construction
[0025] figure 1 It is a circuit diagram of the charging microcontroller integrated circuit 10 according to the embodiment of the present invention. Please refer to figure 1 , the charging microcontroller integrated circuit 10 includes a voltage adjusting terminal 11 and a voltage stabilizing circuit 12 , wherein the voltage stabilizing circuit 12 includes a voltage dividing circuit 121 , a shunt element 122 and an amplifier 123 . In addition, in order to protect the charging microcontroller integrated circuit 10 , a resistor R11 is additionally coupled to the voltage adjustment terminal 11 . The coupling relationship of this circuit is shown in the figure.
[0026] Here, it is assumed that the voltage adjustment terminal 11 is the power input terminal of the charging micro-control integrated circuit 10 , and the rated operating voltage of the charging micro-control integrated circuit 10 is 5V. The voltage divider circuit 121 is used to reduce the voltage difference between ...
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The invention relates to a voltage stabilizing circuit and a charge micro-control integrative circuit in which the voltage stabilizing circuit is built. The voltage stabilizing circuit comprises a voltage regulation end, a bleeder circuit, a vent diverter and an amplifier, wherein, the bleeder circuit and the vent diverter are coupled between the voltage regulation end and common-connection voltage; the bleeder circuit is used for outputting bleeder voltage which is proportionate to the difference of the voltage of the voltage regulation end and the common-connection voltage; the vent diverter determines whether to conduct a circuit between the voltage regulation end and the common-connection voltage or not according to the voltage received by the control end of the vent diverter; and the first input end of the amplifier receives the bleeder voltage while the second input end of the amplifier receives reference voltage, and the output end of the amplifier is used for determining the voltage the output end of the amplifier outputting to the control end according to the voltage of the first output end and the second output end.
Description
technical field [0001] The present invention relates to a technology related to power electronics, and in particular to a voltage stabilizing circuit and a built-in charging micro-control integrated circuit. Background technique [0002] In recent years, due to the advancement of technology, power supply circuits have been widely used in various power supply devices. Due to the popularization of mobile devices, various batteries, such as nickel-cadmium batteries, lead-acid batteries, nickel-metal hydride batteries, and lithium batteries, have also been developed. Many manufacturers have also developed many charging products using power supply circuits. [0003] Different batteries have different charging characteristics, for example, nickel-cadmium batteries can withstand overcharging, while nickel-metal hydride batteries and lithium batteries cannot withstand overcharging. Especially for lithium batteries, if they are overcharged or short-circuited, the temperature of the...
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IPC IPC(8): G05F1/56
Inventor 王鸿彬廖栋才
Owner GENERALPLUS TECH INC