Switching type multi-power management circuit with extremely low power consumption
A technology for managing circuits and power switch tubes, which is applied in electrical components, output power conversion devices, and irreversible AC power input to DC power output, etc., to ensure high efficiency and stable and reliable operation.
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[0014] figure 1 It is a typical block diagram of the existing scheme. This solution uses a power management IC to implement a typical LED drive application. The solution consists of step-down device 1, operational amplifier OP 2, control module controller 3, resistance network module Rnet 4, power switch tube 5, diode 6, inductor 7, capacitor 8, LED light 9, AC input 10, full bridge rectifier 11 , Chip power supply capacitor 12 composition.
[0015] In the existing solution, the high voltage input charges the chip power supply capacitor 12 through the step-down device 1 to generate the internal power supply VCC of the chip. The VCC is divided by the resistor network Rnet 4 and compared with the chip reference voltage through the operational amplifier OP 2, and the comparison result is input to the step-down device to adjust the value of the current flowing, and finally the voltage value of the capacitor 12 is adjusted. The power supply mode of the existing solution is a linear ...
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