Power management device realizing zero standby current
A power management device and zero-standby technology, applied to electrical components, electronic switches, pulse technology, etc., can solve problems such as prolonging the use time
Active Publication Date: 2013-12-04
江苏华芯智造半导体有限公司
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Problems solved by technology
[0004] The technical problem to be solved by the embodiments of the present invention is to provide a power management device that realizes zero standby current, thereby solving the technical problem that the charging power supply realizes zero power consumption in the standby state and prolongs the use time
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[0019] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0020] Please also refer to figure 1 and figure 2 , a circuit diagram of a power management device for realizing zero standby current in the present invention, the power management device 10 includes a USB input interface 101 , a USB output interface 102 , a battery 103 , a key unit 104 and a control unit 20 . The control unit 20 includes pins VCC, L1-L4, LED, KEY, GND, STB, VFB, EXT, LX, BTP, CH_EXT, and CE, wherein VCC is a power pin and an input pin for charging the battery 103 . L1~L4 are battery power display pins, and each pin corresponds to an external LED light 105~108. The LEDs are lighting pins, which are used to connect an external high-brightness LED lamp 109 . KEY is a...
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An embodiment of the invention discloses a power management device realizing zero standby current. The power management device comprises a USB (universal serial bus) input interface, a USB output interface, a battery, a key unit and a control unit. The control unit comprises an operating state detection module, a key signal detection module and a key detection enable signal generation module. The operating state detection module judges that an external power supply is disconnected by detecting the USB input interface, the power management device is in a standby state, and the control unit is switched off. The key detection enable signal generation module generates corresponding enable signals according to control signals and triggering signals of the key unit, triggers starting of the key signal detection module and keeps the key signal detection module in an operating state within a preset time period. The key signal detection module responds to the enable signals and controls the power management device to execute corresponding functions according to the key triggering signals. By the aid of the power management device, the zero current is kept in standby, so that standby time of the battery is prolonged.
Description
technical field [0001] The invention relates to the technical field of power control circuits, in particular to a power management device for realizing zero standby current. Background technique [0002] The existing portable charging power supply usually integrates charging and power supply, and can charge digital devices such as mobile phones anytime and anywhere, and the charging power supply generally uses lithium batteries or dry batteries as power storage units, and its built-in batteries have 3~3% of the power of ordinary batteries. More than 5 times, and at the same time, it can also charge its own power storage unit through an external power supply. [0003] Since the operation of the charging power is generally controlled by buttons, even when it is in standby, the control chip needs to detect the operation of the buttons in real time, which requires a certain amount of power consumption; The resistance path between them also consumes a certain amount of power. T...
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IPC IPC(8): H03K17/96
Inventor 宋利军
Owner 江苏华芯智造半导体有限公司