Power consumption has two meanings, namely: 1. It represents the loss of power, which refers to the difference between the input power and output power of equipment or devices; 2. It is an indicator that all electrical equipment has, referring to is the amount of energy consumed per unit time, the unit is W.
Power consumption
Definition 1:
Power loss refers to equipment, devices, etc. The difference between input power and output power. Power loss. In a circuit, it usually refers to the heat energy dissipated on components and devices.
Definition 2:
Power consumption is also an indicator that all electrical equipment has. It refers to the amount of energy consumed per unit time, in W. In the circuit, it refers to the power required by the complete machine or equipment. However, unlike electric lights, copiers do not always work. When they are not working, they are in standby mode, and they also consume a certain amount of energy (no energy is consumed unless the power is turned off). Therefore, there are generally two power consumptions of a copier, one is the power consumption during operation, and the other is the power consumption during standby.
Related introduction:
Standby power consumption
In 2001, the European Union required that the no-load power loss for rated output power 0.3W~70W was 1W. ; In 2005, the European Union changed this standard to 0.3W for no-load power loss for rated output power 0.3W~50W, and 0.75W for no-load power loss for rated output power 15W~70W. It can be seen from this that everyone's requirements for the power consumption of electrical products are becoming increasingly strict.
In order to comply with various specifications set by organizations such as the European Union for product power consumption, many new technologies have emerged. The main idea is to enable switching power supplies to switch at a lower speed when the load is very small or in standby mode when no load is present. frequency operation.
The UCC28600 power supply solution provided by TI uses a power control method that combines quasi-resonant zero voltage and fixed-frequency discontinuous modes in the 30% to 100% output power range, as well as a drive capability of up to 1A, making it The switching loss of the flyback power supply is greatly reduced, and the operating efficiency of the whole machine reaches more than 85%. In the 10% to 30% output power range, the power supply control method of the fixed peak current off-time modulation mode is used to reduce the dynamic load of the power supply. The response and conversion efficiency in the low power section have been greatly improved; at the same time, a pulse-skipping standby control mode is adopted in about 10% of the output power section, making the standby power consumption as low as 150 milliwatts.
UCC28600 can directly drive a flyback power supply up to 200 watts. At the same time, the UCC28600's own pin function can automatically shut down the PFC function in standby mode, making the user's design simpler and cheaper.
The above is the detailed content of What does power consumption mean?. For more information, please follow other related articles on the PHP Chinese website!