Power supplying apparatus having a detectable useful life
There is provided a power supplying apparatus capable of determining whether to be normally operated by detecting whether a capacitor deteriorates with age based on a ripple voltage generated by switching of a primary side, the power supplying apparatus including a power supply unit switching input power to convert the input power into preset direct current (DC) power, a detecting unit setting a reference voltage based on the DC power of the power supply unit and comparing the reference voltage with a ripple voltage included in the DC power to detect a voltage level of the ripple voltage, and a controlling unit determining whether an abnormality has occurred according to a detection result of the detecting unit.
1. A power supplying apparatus comprising:
a power supply unit switching input power of a primary side to convert the input power into preset direct current (DC) power;
a detecting unit setting a reference voltage based on the DC power of the power supply unit and comparing the reference voltage with a ripple voltage included in the DC power to detect a voltage level of the ripple voltage in a secondary side insulated from the primary side; and
a controlling unit determining whether an abnormality has occurred according to a detection result of the detecting unit,
wherein the detecting unit includes:
a dividing resistor group dividing a voltage level of the DC power according to a preset resistance ratio;
first and second diodes transferring respective voltage levels divided by the dividing resistor group to different paths;
a first capacitor stabilizing the voltage level from the first diode; and
a comparator comparing the voltage level from the second diode input to a negative terminal thereof and the voltage level from the first diode input to a positive terminal thereof.
2. The power supplying apparatus of claim 1 , wherein the power supply unit includes a smoothing unit having a capacitor smoothing the power generated by rectifying the input power.
3. The power supplying apparatus of claim 2 , wherein the detecting unit detects the voltage level of the ripple voltage caused by the capacitor of the smoothing unit.
4. The power supplying apparatus of claim 1 , wherein the detecting unit includes:
a first dividing resistor group dividing a voltage level of the DC power according to a first preset resistance ratio;
a second dividing resistor group dividing a voltage level of the DC power according to a second preset resistance ratio;
a first capacitor stabilizing the voltage level divided by the second dividing resistor group; and
a comparator comparing the divided voltage level transferred from the first dividing resistor group and input to a negative terminal thereof and the divided voltage level transferred from the second dividing resistor group and input to a positive terminal thereof.
5. The power supplying apparatus of claim 4 , wherein the detecting unit further includes a second capacitor stabilizing the voltage level divided by the first dividing resistor group.
6. The power supplying apparatus of claim 5 , wherein the first capacitor has capacitance higher than that of the second capacitor.
7. The power supplying apparatus of claim 1 , wherein the detecting unit further includes a second capacitor stabilizing the voltage levels divided by the dividing resistor group.
8. The power supplying apparatus of claim 7 , wherein the first capacitor has capacitance higher than that of the second capacitor.
9. The power supplying apparatus of claim 2 , wherein the power supply unit includes:
a rectifying unit rectifying the input power;
a converting unit switching the power smoothed by the smoothing unit and transforming the switched power according to a preset turns ratio; and
a stabilizing unit stabilizing the transformed power from the converting unit to output the stabilized power.
10. The power supplying apparatus of claim 1 , further comprising an outputting unit switching an output of the DC power on or off according to a control of the controlling unit.
11. The power supplying apparatus of claim 1 , further comprising a display unit displaying whether the abnormality has occurred according to a control of the controlling unit.
12. A power supplying apparatus comprising:
a power supply unit including a smoothing unit having a capacitor smoothing power generated by rectifying input power of a primary side and switching the smoothed power to convert the smoothed power into preset DC power;
a detecting unit setting a reference voltage based on the DC power of the power supply unit and comparing the reference voltage with a ripple voltage included in the DC power by the capacitor of the smoothing unit to detect a voltage level of the ripple voltage in a secondary side insulated from the primary side; and
a controlling unit determining whether an abnormality has occurred according to a detection result of the detecting unit,
wherein the detecting unit includes:
a dividing resistor group dividing a voltage level of the DC power according to a preset resistance ratio;
first and second diodes transferring respective voltage levels divided by the dividing resistor group to different paths;
a first capacitor stabilizing the voltage level from the first diode; and
a comparator comparing the divided voltage level transferred from the first dividing resistor group and input to a negative terminal thereof and the divided voltage level transferred from the second dividing resistor group and input to a positive terminal thereof.
13. The power supplying apparatus of claim 12 , wherein the detecting unit includes:
a first dividing resistor group dividing a voltage level of the DC power according to a first preset resistance ratio;
a second dividing resistor group dividing a voltage level of the DC power according to a second preset resistance ratio;
a first capacitor stabilizing the voltage level divided by the second dividing resistor group; and
a comparator comparing the divided voltage level transferred from the first dividing resistor group and input to a negative terminal thereof and the divided voltage level transferred from the second dividing resistor group and input to a positive terminal thereof.
14. The power supplying apparatus of claim 13 , wherein the detecting unit further includes a second capacitor stabilizing the voltage level divided by the first dividing resistor group.
15. The power supplying apparatus of claim 14 , wherein the first capacitor has capacitance higher than that of the second capacitor.
16. The power supplying apparatus of claim 12 , wherein the detecting unit further includes a second capacitor stabilizing the voltage levels divided by the dividing resistor group.
17. The power supplying apparatus of claim 16 , wherein the first capacitor has capacitance higher than that of the second capacitor.
18. The power supplying apparatus of claim 12 , wherein the power supply unit includes:
a rectifying unit rectifying the input power;
a converting unit switching the power smoothed by the smoothing unit and transforming the switched power according to a preset turns ratio; and
a stabilizing unit stabilizing the transformed power from the converting unit to output the stabilized power.
19. The power supplying apparatus of claim 12 , further comprising an outputting unit switching an output of the DC power on or off according to a control of the controlling unit.
20. The power supplying apparatus of claim 12 , wherein further comprising a display unit displaying whether the abnormality has occurred according to a control of the controlling unit.