Aug 31, 2013
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Adopt 10W air conditioner switching power supply of VIPer22A
At present, the new air conditioner adopts two pieces of main undervoltage to export for the internal electronic device to supply power. These two pieces of undervoltage of primary output are +12V and +5V separately. The low output voltage is produced from an internal switching power supply. This switching power supply needs a plurality of following important characteristics: High in efficiency, light, the size is small, the low grade of the power consumption of awaiting the opportune moment. The designer can develop a piece of power with all these important functions while utilizing the VIPerX2 series products, so, this series of products develop applied optimal solutions of the air conditioner, especially the circuit board that this text introduces is the characteristic shown in order to improve Fig. 1 and are specially developed, Table 1 has enumerated the technical specification of switching power supply of air conditioner. The new air conditioner adopts two pieces of main undervoltage to export for the internal electronic device to supply power. These two pieces of undervoltage of primary output are produced from an internal switching power supply, they are +12V and +5V respectively. This switching power supply should have the weight is light, the size is little, low grade characteristic of the power consumption of awaiting the opportune moment with high efficiency. This text introduction utilizes the power embodiment with all these important functions of VIPerX2 series product development. At present, the new air conditioner adopts two pieces of main undervoltage to export for the internal electronic device to supply power. These two pieces of undervoltage of primary output are +12V and +5V separately. The low output voltage is produced from an internal switching power supply. This switching power supply needs a plurality of following important characteristics: High in efficiency, light, the size is small, the low grade of the power consumption of awaiting the opportune moment. The designer can develop a piece of power with all these important functions while utilizing the VIPerX2 series products, so, this series of products develop applied optimal solutions of the air conditioner, especially the circuit board that this text introduces is the characteristic shown in order to improve Fig. 1 and are specially developed, Table 1 has enumerated the technical specification of switching power supply of air conditioner.
Table 1: Electric specification
Fig. 1: CIBOL
1. VIPERX2A describes
VIPerX2A one the intersection of form and encapsulated products, the intersection of integration and one specialized electric current the intersection of PWM and control device and first high-pressure the intersection of power and the intersection of field effect and transistor MOS on the same drops of chip. This kind of method can reduce the assembly quantity, reduce the system cost, simplify the circuit board to design. So, this product family is used in the off lining switching type power supply extensively. In addition, this series of products also adopt miniature SMD to capsulate (SO-8) . VIPer series await the opportune moment power consumption ' Smaller than 1W) Accord with the energy-conserving standard of star magnitude of the blue sky making and energy.
1.1. General characteristic VIPerx2A products adopt VIPower M0-3 high-pressure patented technology of ST, M0-3 high-pressure technology utilizes a P type to bury the method of layer, allow the integrated low voltage system (PWM) on the same chip The power level that and the electric current flows vertically, as shown in Fig. 2. VIPerX2A products have the following general characteristics: The automatic heat is shut off; Start the current source under high pressure; Prevent that exporting shorting out results in puncturing the hiccupping (HICCUP) of the trouble Mode; Guarantee the burst mode of low power consumption under the low loading condition. Moreover, VIPower M0-3 technology can also be used for developing the transistor MOS of field effect of power that minimum spark-over voltage is 730V. Table 2 has explained the handling capacity of power of this product under different capsulation and working condition.
Fig. 2: MO-3 technological synoptic diagram
Table 2: Handling capacity of power under different capsulation and working condition
1.2. Structured flowchart
Through observing the synoptic diagram of Fig. 3 carefully, we are easy to find out the power level is driven by the electric current type structure with a fast comparator, the drive current comes from NMO Ssense and feed-back (FB) Two pins. The comparator is exported and connected to the time module of blanking, so as to ensure to turn on time is shortest. Only takes an external oscillator, can fix switching frequency in 60kHz, thus no longer need other outside assemblies. Other internal module is stabilizator and overheat detector of internal electrical power supplies, the former can support 45V on VDD pin, the latter is in 170