KR19980066675A - Charging device for pre-volt cordless telephone - Google Patents

Abstract

end. TECHNICAL FIELD The present invention relates to a radiotelephone, and more particularly, to a free voltag charging apparatus which can freely use a portable device of a radiotelephone in a 220V / 110V region.

I. Technical problem to be solved by the present invention: Since the conventional charging device must have a power adapter for selecting and switching the input power between the power input terminal and the charging unit, when the charging device is installed, the size of the power adapter is large. It solves a problem that was occupied a lot, and the cumbersome problem of having to switch to the corresponding power during installation because the input power is changed locally.

All. Summary of the Invention The present invention provides a charging device for a wireless telephone having a separate power adapter for selecting a power source and a charging unit for charging a rechargeable battery according to the type of input power. In;

Built-in the power adapter unit therein is characterized in that it is provided with a free-volt charging unit that can be used freely regardless of the type of input power.

la. Significant use of the invention: Charging device for pre-volt type cordless telephone.

Description

Charging device for pre-volt cordless telephone

The present invention relates to a radiotelephone, and more particularly, to a free voltag charging apparatus which can freely use a portable device of a radiotelephone in a 220V / 110V region.

In general, the charging device of the portable telephone apparatus has a power adapter that can be switched according to the type of power input (110V / 220V), and thus 220V power and 110V power can be selectively used. For example, the charging device will be described in detail with reference to FIG. 1. FIG. 1 is a block diagram of a conventional charging device. First, the configuration is largely divided into two parts and includes a power adapter unit for selecting a power source according to the type of input power and a charging unit for charging a rechargeable battery. Therefore, the power selectively output from the power adapter unit is input to the charging unit and charged in the rechargeable battery.

In this case, the power adapter unit has a transformer 10 for selectively switching the input power therein, a full-wave rectifying unit 20 for receiving full-wave rectification by receiving the power output selectively from the transformer, and the full-wave rectified power 50 Hz. Or it is comprised by the power supply stabilization circuit part 30 which stabilizes the ripple component of a 60 Hz component. The charging unit receives the power output from the power stabilization circuit unit 30 in the power adapter unit and charges the battery under the control of the charging current controller 40 and the charging current controller 40 to control the charging current of the charging battery. The battery charging terminal 50 for charging the battery for the charge, and the charge display unit 60 for detecting and displaying the charge current amount by detecting the battery charging terminal 50.

However, the conventional charging device as described above has to have a power adapter for selecting and switching the input power between the power input terminal and the charging unit, so that the size of the power adapter when installing the charging device occupies a lot of installation place. There was this.

In addition, as another problem of the present invention, since the input power is changed locally, there is a cumbersome problem of switching a switch to the corresponding power during installation.

Accordingly, it is an object of the present invention to provide a pre-volt type charging device that can be freely used regardless of the type of an input power source by embedding a power adapter for selective switching switching of 220V / 110V.

As described above, the present invention provides a charging apparatus for a wireless telephone having a power adapter unit for selecting a power source and a charging unit for charging a rechargeable battery according to the type of input power.

Built-in the power adapter unit therein is characterized in that it is provided with a free-volt charging unit that can be used freely regardless of the type of input power.

1 is a block diagram of a conventional charging device.

2 is a block diagram of a charging device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a block diagram of a charging device according to an embodiment of the present invention. Referring to FIG. 2, the power adapter unit described above with reference to FIG. 1 is incorporated in a charging unit. The present invention has a configuration in which only the transformer 200 installed inside the charging unit is different from each other. (10) was designed as a free-volt type that can be used in combination with 110V / 220V. In this case, in the design of the transformer 200, one of the most important matters is heat transfer to the portable device due to heat generation of the transformer 200, so that the generated heat should be suppressed to the maximum. Therefore, the transformer 200 selects a circuit component capable of obtaining sufficient heat loss and breakdown voltage at the maximum voltage of 220V, and is designed to generate a voltage on the secondary side such that the charging current is maintained at the minimum voltage of 110V. At this time, the minimum voltage of the charging circuit is determined to maintain a sufficient charging current in the 110V-15% region. In addition, since the transformer 200 can be implemented with a relatively small capacity only by reducing the charging current to a minimum, the charging method of the portable device adopts a charging method based on the consumption current, and consumes the current and the current consumption in the standby state. Classify as As a result, a general charging method of charging at 1/10 of the battery capacity and a triggle charging method of charging at 1/20 are used.

Then, when using 600mAH which is the capacity of the commonly used battery, if the charging current of the battery is designed to charge at 0.1C, the charging current should be 60mAH, and the charging current to charge the portable device is The battery is charged with the sum of the current charged by the battery and the current consumed in the charged state. In this case, the current consumed in the standby state is generally the same as the current consumed in the charged state. The current value is usually 40 mAH.

As a result, the total charging current of the charger is the sum of the charging current of 60 mAH of the battery and the consumption current of 40 mAH of the logic board of the portable device, and the current value becomes 100 mAH, and the value of the transformer 200 again. The maximum allowable current value rises as the maximum current consumption value

Therefore, the design specifications of the transformer based on the maximum allowable current value of 100mAH as shown in Table 1.

TABLE 1

Power supply specification Primary voltage Secondary Design Specifications Design specification 220V + 15% 253 V 18.4 V Thermal Rise Limit Voltage 220V + 0% 220 V 16 V 8V × 2 times (110V → 220V) 220V-15% 187 V 13.6 V ---------- 110V + 15% 166.5 V 10.4V 8V × 30% 110V + 0% 110 V 9.2V 8V × 15% 110V-15% 93.5 V 8.0V Minimum required voltage

The present invention as described above has a built-in power adapter for the selective switching switching 220V / 110V to the charging unit, by providing a pre-volt type charging device that can be freely used regardless of the type of input power, to facilitate the user's convenience It can increase the competitiveness of the product, and also has the advantage of reducing the production cost when producing the product.

Claims (3)

In a charging device of a wireless telephone having a power adapter for selecting a power source according to the type of input power and a charging unit for charging a rechargeable battery, And a pre-bolt type charging unit which can be freely used regardless of the type of input power by embedding the power adapter inside. The method of claim 1, wherein the charging unit, A charging device for a radiotelephone comprising: a pre-volt type transformer for minimizing self-heating and for minimizing current capacity. The said charging part of any one of Claims 1 thru | or 2, And a charging current controller for controlling charging current to perform normal charging and trickle charging in order to minimize the capacity of the current of the pre-volt type transformer.