Abstract:
A driving apparatus includes a DC-to-DC converter, a first LED series, a second LED series, a first constant-current circuit, a second constant-current circuit, and a feedback circuit. The DC-to-DC converter respectively outputs a direct-current voltage to one terminal of the first and the second LED series to generate a first potential and a second potential at the other terminal of the first and the second LED series according to a feedback voltage. The first and the second constant-current circuits are respectively coupled to the other terminal of the first and the second LED series and output a first current and a second current for driving the first and the second LED series according to a first and a second control signals. The feedback circuit uses the lower one of the first potential and the second potential as a feedback voltage.
Abstract:
A one way conductor includes a MOSFET and a driving device. The MOSFET has a source and a drain respectively serving a positive end P and a negative end N of the one way conductor. The driving device including a BJT differential amplifier detects a voltage difference between the source and the drain of the MOSFET. When the voltage of the positive end P is higher than the voltage of the negative end N, the driving device outputs a driving voltage to a gate of the MOSFET to turn on the MOSFET. If the voltage of the positive end P is lower than the voltage of the negative end N, the driving device cannot output the driving voltage for turning on the MOSFET, and the one way conductor is turned off at this time. Consequently, the one way conductor of the invention has the one way conductive property.
Abstract:
A power supply device providing required power to a loading device. The power supply device includes a battery, an adjustable power converter and a control circuit. The battery, having a current meter, selectively outputs required power to the loading device. The power converter receives and converts an AC voltage into a first DC voltage or a second DC voltage, further receives an adjusting signal. The power converter outputs the second DC voltage when the adjusting signal is enabled. The magnitude of the second DC voltage is lower than the output voltage of the battery. The control circuit is coupled to the battery and the power converter. When the power of the battery is gauged, the control circuit enables the adjusting signal for the power converter to output the second DC voltage, so that the battery discharges the loading device for the current meter to re-gauge the power of the battery.
Abstract:
A temperature control system used in a portable computer comprises a first control part, a second control part connected to an operation processing unit (OPU), a third control part and a fourth control part connected to a charge part. The first control part outputs a first control signal for responding the temperature and load current changes of an external power transformer. The third control part outputs a second control signal for responding the temperature and load current changes of a battery. When the portable computer is powered by the external transformer, the second control part receives the first control signal to control the OPU, and the fourth control part controls the charge current of the charge part. When the portable computer is powered by the battery, the second control part receives the second control signal to control the OPU.
Abstract:
A power supply device providing required power to a loading device. The power supply device includes a battery, an adjustable power converter and a control circuit. The battery, having a current meter, selectively outputs required power to the loading device. The power converter receives and converts an AC voltage into a first DC voltage or a second DC voltage, further receives an adjusting signal. The power converter outputs the second DC voltage when the adjusting signal is enabled. The magnitude of the second DC voltage is lower than the output voltage of the battery. The control circuit is coupled to the battery and the power converter. When the power of the battery is gauged, the control circuit enables the adjusting signal for the power converter to output the second DC voltage, so that the battery discharges the loading device for the current meter to re-gauge the power of the battery.
Abstract:
A connector set of notebook computer is provided. The connector set includes a power supply connector, a host connector, a battery connector and a battery recess connector. The host connector is fixed on the notebook computer and electrically connected to the power supply connector. The battery connector is removably disposed on the notebook computer. The battery recess connector is fixed in a battery recess of the notebook computer. The battery connector is capable of being electrically connected to both battery recess connector and the power supply connector. That is, the battery connector of the invention is selectively connected to the battery recess connector or the power supply connector. Thus, the flexibility and convenience of the connector is largely increased.
Abstract:
An electronic apparatus capable of effectively using power of an AC/DC adaptor including a host and an AC/DC adaptor is provided. The AC/DC adaptor is used for receiving an AC power and converting it into a DC power for the host. At the same time, the AC/DC adaptor outputs a controlling signal to control the power consumption of the host according to the power output at that time. The AC/DC adaptor includes a switching power converter for converting the AC power into the DC power, and a power supply controller for outputting a controlling signal according to the power output by the switching power converter.
Abstract translation:提供一种能够有效地使用包括主机和AC / DC适配器的AC / DC适配器的电力的电子设备。 AC / DC适配器用于接收交流电源,并将其转换为主机的直流电源。 同时,AC / DC适配器输出控制信号,以根据当时的功率输出来控制主机的功耗。 AC / DC适配器包括用于将AC电力转换为DC电力的开关电力转换器,以及用于根据开关电力转换器的输出输出控制信号的电源控制器。
Abstract:
A voltage balancing device is to be used in a dc power supplying system which includes first and second power supplying units that are connected in series to supply power concurrently operate an electrical load. The first power supplying unit has a negative terminal and a positive terminal to be connected to the electrical load. The second power supplying unit has a positive terminal connected to the negative terminal of the first power supplying unit, and a negative terminal to be connected to a ground. The voltage balancing device includes a reference voltage generating unit connected in parallel to the power supplying system and having an output that provides a reference voltage, and a comparator unit having a first input port connected to the output of the reference voltage generating unit, a second input port connected to a junction of the first and second power supplying units of the power supplying system so as to receive a detected voltage therefrom, and an output port connected to the second input port.
Abstract:
The invention discloses a power supply system for charging a rechargeable battery in a portable electronic device. The power supply system of the invention redefines an output curve of a power adapter, such that the power adapter can work in a maximum power region for a long time. When a system current plus a charging current exceed a maximum current limit of the power adapter, the power supply system of the invention will automatically lower the current for charging a battery, so as to prevent the power adapter from being shut down.
Abstract:
A charging-discharging control device has a selector, a charging circuit and at least two battery packs. The selector has a controller and a discharging switch. When a controller input voltage is higher than a preset voltage, the controller generates a charge-discharge signal of a first voltage level, and when the controller input voltage is not higher than the preset voltage, the controller generates the charge-discharge signal of a second voltage level, and the discharging switch is turned on. The charging circuit coupled to the selector. When the charge-discharge signal is at the first voltage level, the charging circuit charges the battery packs. When the charge-discharge signal is at the second voltage level, the battery packs supply the power to a loading system.