Power supply device for realizing instant heavy current under current-limiting condition
A power supply device and high current technology, applied in the direction of output power conversion device, DC power input conversion to DC power output, electrical components, etc., can solve the problems of small energy storage capacitors, etc., and achieve large instantaneous working current and high working efficiency and output power, high efficiency effect
Inactive Publication Date: 2010-06-02
CHIPHOMER TECH SHANGHAI
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[0022] The purpose of the present invention is to provide a power supply device that realizes instantaneous large current under current limiting conditions, solves the existing deficiencies and defects of the existing power supply device, adopts smaller energy storage capacitors, and obtains higher working efficiency and output power
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[0047] Such as image 3 As shown, the power supply device for realizing instantaneous large current under the current limiting condition of the present invention includes an energy storage capacitor C, a current limiting module Current Limit, a switching power supply BUCK and a switching power converter BOOST, and the input voltage VIN passes through the current limiting module Current Limit The first output terminal of the switching power supply converter BOOST and the first input terminal of the switching power supply BUCK are connected in turn, the output terminal of the switching power supply BUCK outputs the output voltage VOUT and is connected to the load Load, and one end of the energy storage capacitor C is connected to the switching power supply converter Between the output terminal of BOOST and the first input terminal of the switching power supply BUCK, the other terminal of the energy storage capacitor C is grounded, and the second output terminal of the current lim...
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The invention discloses a power supply device for realizing instant heavy current under a current-limiting condition, comprising an energy-storing capacitor, a current-limiting module, a switch power supply and a converter of the switch power supply, wherein input voltage is sequentially connected to the converter of the switch power supply and the first input end of the switch power supply through the current-limiting module, and the output end of the switch power supply outputs output voltage and is connected with a load; one end of the energy-storing capacitor is connected between the output end of the converter of the switch power supply and the first input end of the switch power supply, and the other end of the energy-storing capacitor is connected to the ground; and the second output end of the current-limiting module is connected with the second input end of the switch power supply. When the invention is in three operation states of normal operation, instant heavy current and energy storage of the energy-storing capacitor, current generated by different accesses respectively supplies power to the load, and the power supply device adopts the small energy-storing capacitor to obtain high operation efficiency and output power so that the purpose of the invention is achieved.
Description
technical field [0001] The invention relates to a power supply device, in particular to a power supply device capable of realizing instantaneous large current under current limiting condition. Background technique [0002] Now, many modules or devices require high instantaneous current in application, and the rated current of the power supply for the module or device is limited, so generally an energy storage capacitor is needed to provide the required current instantaneously. [0003] Such as figure 1 As shown, in the system working mode of the existing power supply device, VIN represents the input voltage, VC represents the voltage of the energy storage capacitor, VOUT represents the output voltage, C represents the energy storage capacitor, Current Limit represents the current limiting module, and BUCK represents the step-down type The switching power supply for DC conversion, and Load indicates the load that needs to be powered. [0004] The normal current in the norma...
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Inventor 白建雄吴珂
Owner CHIPHOMER TECH SHANGHAI