TWI403877B - A power module and a power supply with the power module - Google Patents

Abstract

A power module is used to receive an input electrical energy from an external power source, and transmits the minimum output power accordingly, the power module comprises the relative duty cycle control unit and work-time loss circuit; the relative duty cycle control unit is used to receive the input electric energy, and the relative duty cycle is set to a lower-limit relative duty cycle so as to output the original minimum output electric energy with high potential output at one startup working time during the operation cycle; the work-time loss circuit is electrically connected to the relative duty cycle control unit in order to receive the original minimum output electric energy , and delay the startup time, as such, a residual relative duty cycle smaller than the lower-limit relative duty cycle is utilized to output the minimum output electric energy; the present invention also discloses a power supply using the power module.

Description

Power module and power supply having the same

The invention relates to a power module, in particular to a power module with a working time loss circuit.

Please refer to the first figure. The first figure is a schematic diagram of a power module of the prior art. The power module 100 of the prior art includes a relative duty cycle control unit 11 for receiving an output power from the external power source after receiving the input power Vin. The current relative duty cycle control unit 11 has a lower limit relative duty cycle in use, in other words, the output power system has a minimum value, and the relative duty cycle control unit 11 adjusts the relative duty cycle to When the lower limit is relative to the duty cycle, the power module 100 outputs an original minimum output electrical energy Va.

In many fields, high voltage is often required. The general method is to connect multiple power modules 100 in series. For example, when one power supply is connected in series with three power modules 100, it can be output. The terminal obtains the accumulated value of the output power of the three power modules 100. However, when the operation requires the use of a low voltage, since the duty cycle control unit 11 in each power module 100 has a lower limit relative duty cycle, the entire power supply The minimum output power that the supplier can provide is three times the original minimum output power Va.

In order to solve the problem of excessive output power consumption, the conventional technology uses the frequency reduction method to reduce the original minimum output power Va of each power module 100. However, in electronic products, the electromagnetic interference (EMI) is mostly used. It is designed for some frequencies of noise, so the frequency reduction of the power supply will lead to a reduction in the effectiveness of anti-electromagnetic interference, which in turn affects the performance of electronic products.

Accordingly, the main object of the present invention is to provide a power module having a working time loss circuit to delay the initial working time of the original minimum output power, thereby enabling the power module to output a minimum output power smaller than the original minimum output power. .

A power module is configured to receive an input power from an external power source and to transmit a minimum output power, the power module includes a relative duty cycle control unit and a working time loss circuit; and a relative duty cycle control unit is configured to receive the input The electric energy, and the relative duty cycle is set to a lower limit relative duty cycle, so that at the initial working time of one of the operating cycles, the original minimum output electric energy is outputted at a high potential; the working time loss circuit is electrically connected to the relative duty cycle control unit. The minimum output power is received by receiving the original minimum output power and delaying the initial working time, thereby utilizing a residual relative duty cycle that is less than the lower limit relative duty cycle.

In a preferred embodiment of the present invention, the working time loss circuit has an input end for receiving the original minimum output power, and an output end for outputting the minimum output power, and includes a diode, a resistor and a capacitor; The two-pole system has an anode and a cathode, the anode is electrically connected to the output end, the cathode is electrically connected to the input end, and the resistor is electrically connected between the output end and the input end, and is connected in parallel with the diode; Electrically connected to the output terminal and the ground terminal.

Compared with the conventional power module, the present invention utilizes a working time loss circuit to delay the initial working time of the original minimum output power, so that the residual relative duty cycle less than the lower limit relative duty cycle can be utilized, and the output is smaller than the original minimum output power. The minimum output power, in other words, when the power supply is connected in series with the power modules of the present invention, the minimum value of the output power can be less than the accumulated value of the original minimum output power of each power module, and Apply the power supply to low voltage output applications.

The specific embodiments of the present invention will be further described by the following examples and drawings.

The invention relates to a power module, in particular to a power module with a working time loss circuit. The invention is illustrated by the following description of the preferred embodiments of the invention. The contents of this preferred embodiment are detailed below.

Please refer to the second, third and fourth figures. The second figure is a functional block diagram of the power module of the present invention. The third figure is the working time loss circuit receiving the original minimum output power and outputting the minimum output power. The first schematic diagram, the fourth diagram is a second schematic diagram of the working time loss circuit receiving the original minimum output power and outputting the minimum output power. The power module 200 of the present invention is configured to receive an input power Vin from an external power source and to transmit a minimum output power Voa, min. The power module 200 includes a relative duty cycle control unit 21 and a working time loss circuit 22.

The relative duty cycle control unit 21 is configured to receive the input power Vin and set the relative duty cycle to a lower limit relative duty cycle, thereby starting to output the original minimum output power Va at a high potential at one of the operating hours of the operating cycle; In the third figure, for example, the time of each operation cycle is Ta, and when the relative responsibility cycle control unit 21 sets the relative duty cycle to a lower limit relative responsibility cycle, if the total time of the high potential in one operation cycle is Tb, then The lower limit relative liability cycle is Tb/Ta.

The working time loss circuit 22 is electrically coupled to the relative duty cycle control unit 21 to receive the original minimum output power Va and delay the initial working time, thereby outputting the minimum output power Voa using a residual relative duty cycle that is less than the lower limit relative duty cycle. Taking the third figure as an example, the initial working time of the original minimum output electric energy Va is originally time 0 and time Ta. If the working time loss circuit 22 delays the initial working time by Tc, the minimum output electric energy Voa, min The initial working time is time Tc and time Ta+Tc, and the minimum output electric energy Voa,min is output at a residual relative duty cycle (Tb-Tc)/Ta which is less than the lower limit relative duty cycle Tb/Ta.

Further, taking the fourth figure as an example, when the working time loss circuit 22 delays the initial working time of the original minimum output electric energy Va by more than Tb, the residual relative duty cycle of the minimum output electric energy Voa, min is 0. In other words, the voltage value of the minimum output power Voa, min is zero.

In order to achieve the power module of the present invention, the working time loss circuit can have various embodiments. Here, only a preferred embodiment is explained. Please refer to the fifth figure, and the fifth figure is the first implementation of the working time loss circuit. Example structure diagram. In the preferred embodiment, the working time loss circuit 22 may have an input for receiving the original minimum output power Va, and an output for outputting the minimum output power Voa, min, and includes a diode D and a resistor R. And the capacitor C; the diode D has an anode and a cathode, the anode is electrically connected to the output end, the cathode is electrically connected to the input end, and the resistor R is electrically connected between the output end and the input end, and The pole body D is connected in parallel; the capacitor C is electrically connected to the output end and the ground end; therefore, when the original minimum output electric energy Va is input from the input end of the working time loss circuit 22, the capacitor C starts to accumulate electric energy and reaches Tc at time. And when Ta+Tc, the accumulated voltage exceeds the high potential reference voltage V', and when the original minimum output electric energy Va is at the low potential at time Tb, the diode D is turned on and the capacitor C is discharged to make the minimum output electric energy Voa, Min is also at a low potential at time Tb, so that the initial working time of the original minimum output electric energy Va is delayed by Tc, and the residual relative duty cycle (Tb-Tc) is less than the lower limit relative duty cycle Tb/Ta/ Ta lose The minimum power output Voa, min.

In summary, referring to the sixth figure, the sixth figure is a schematic diagram of a power supply of a plurality of power modules of the present invention connected in series. When the power supply unit 300 is connected in series with the three power modules 200a, 200b, and 200c, if the relative duty cycle control units 21a, 21b, and 21c set the relative duty cycle to a lower limit relative duty cycle, the three power modules 200a 200b and 200c may respectively output minimum output electric energy Voa, min, Vob, min and Voc, min, and the minimum cumulative output electric energy Vo, min of the power supply 300 is equal to the minimum output electric energy Voa, min, Vob, min and Voc, The sum of min; wherein the minimum output power Voa, min, Vob, min and Voc, min have a minimum value of 0, depending on the design of the working time loss circuits 22a, 22b and 22c, in the example of the fifth figure It is determined by the resistance of the apparent resistance R and the capacitance of the capacitor C.

It can be clearly seen that, compared to the conventional power module 100, the present invention utilizes a working time loss circuit 22 to delay the initial working time of the original minimum output power Va, so that a residual relative duty cycle less than the lower limit relative duty cycle can be utilized. The output is smaller than the minimum output electric energy Voa, min of the original minimum output electric energy Va. In other words, when the power supply 300 is connected in series with the plurality of power modules 200a, 200b and 200c of the present invention, the minimum cumulative output electric energy Vo can be made. The minimum value of min is less than the accumulated value of the original minimum output power of each of the power modules 200a, 200b, and 200c, and the power supply 300 can be applied to the application of the low voltage output.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed.

100. . . Power module

11. . . Accountability cycle control unit

200, 200a, 200b, 200c. . . Power module

21, 21a, 21b, 21c. . . Relative responsibility cycle control unit

22, 22a, 22b, 22c. . . Working time loss circuit

Vin. . . Input power

Va. . . Original minimum output power

Voa, min, Vob, min, Voc, min. . . Minimum output power

Vo,min. . . Minimum cumulative output power

D. . . Dipole

R. . . resistance

C. . . capacitance

The first figure is a schematic diagram of a power module of the prior art;

The second figure is a functional block diagram of the power module of the present invention;

The third figure is a first schematic diagram of the working time loss circuit receiving the original minimum output power and outputting the minimum output power;

The fourth figure is a second schematic diagram of the working time loss circuit receiving the original minimum output power and outputting the minimum output power;

The fifth figure is a structural diagram of the first embodiment of the working time loss circuit;

The sixth figure is a schematic diagram of a power supply of a plurality of power modules of the present invention connected in series.

200. . . Power module

twenty one. . . Relative responsibility cycle control unit

twenty two. . . Working time loss circuit

Vin. . . Input power

Va. . . Original minimum output power

Voa,min. . . Minimum output power

Claims (3)

A power module for receiving an input power from an external power source and transmitting a minimum output power, the power module comprising: a relative duty cycle control unit for receiving the input power and The relative duty cycle control unit sets a relative duty cycle in each operating cycle to a lower limit relative duty cycle, thereby starting to output a raw minimum output power at a high potential during one of the operating cycles of the operating cycle; a working time loss circuit electrically coupled to the relative duty cycle control unit for receiving the original minimum output power and delaying the initial working time, thereby utilizing a residual relative duty cycle that is less than the lower limit relative duty cycle, and outputting The minimum output power. The power module of claim 1, wherein the working time loss circuit has an input for receiving the original minimum output power, and an output for outputting the minimum output power, and includes The diode has an anode and a cathode, the anode is electrically connected to the output end, and the cathode is electrically connected to the input end; a resistor is electrically connected to the output end and the input Between the terminals, and in parallel with the diode; and a capacitor electrically connected to the output terminal and a ground terminal. A power supply device comprising a plurality of power modules as described in claim 1 , wherein the power modules are connected in series to receive the input power from the external power source and respectively transmit the power. The minimum output power is formed by the output of one of the power supplies to form a minimum cumulative output power.