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1、 AN-022E Rev.1.4 January 2010 1 FA557171A72737455705671 Fuji Electric Systems Co., Ltd. http:/www.fujielectric.co.jp/fdt/scd/ Fuji Switching Power Supply Control IC Green mode Quasi-resonant IC FA5571/71A/72/73/74/ 5570/5671 Application Note January 2010 Fuji Electric Systems Co., Ltd. AN-022E Rev.1
2、.4 January 2010 2 FA557171A72737455705671 Fuji Electric Systems Co., Ltd. http:/www.fujielectric.co.jp/fdt/scd/ 1. The contents of this note (Product Specification, Characteristics, Data, Materials, and Structure etc.) were prepared in January 2010. The contents will subject to change without notice
3、 due to product specification change or some other reasons. In case of using the products stated in this document, the latest product specification shall be provided and the data shall be checked. 2. The application examples in this note show the typical examples of using Fuji products and this note
4、 shall neither assure to enforce the industrial property including some other rights nor grant the license. 3. Fuji Electric Systems Co.,Ltd. is always enhancing the product quality and reliability. However, semiconductor products may get out of order in a certain probability. Measures for ensuring
5、safety, such as redundant design, spreading fire protection design, malfunction protection design shall be taken, so that Fuji Electric semiconductor product may not cause physical injury, property damage by fire and social damage as a result. 4. Products described in this note are manufactured and
6、intended to be used in the following electronic devices and electric devices in which ordinary reliability is required: - Computer - OA equipment - Communication equipment (Terminal) - Measuring equipment - Machine tool - Audio Visual equipment - Home appliance - Personal equipment - Industrial robo
7、t etc. 5. Customers who are going to use our products in the following high reliable equipments shall contact us surely and obtain our consent in advance. In case when our products are used in the following equipment, suitable measures for keeping safety such as a back-up-system for malfunction of t
8、he equipment shall be taken even if Fuji Electric semiconductor products break down: - Transportation equipment (in-vehicle, in-ship etc.) - Communication equipment for trunk line - Traffic signal equipment - Gas leak detector and gas shutoff equipment - Disaster prevention/Security equipment - Vari
9、ous equipment for the safety. 6. Products described in this note shall not be used in the following equipments that require extremely high reliability: - Space equipment - Aircraft equipment - Atomic energy control equipment - Undersea communication equipment - Medical equipment. 7. When reprinting
10、or copying all or a part of this note, our companys acceptance in writing shall be obtained. 8. If obscure parts are found in the contents of this note, contact Fuji Electric Systems Co.,Ltd. or a sales agent before using our products. Fuji Electric Systems Co.,Ltd. and its sales agents shall not be
11、 liable for any damage that is caused by a customer who does not follow the instructions in this cautionary statement. Caution AN-022E Rev.1.4 January 2010 3 FA557171A72737455705671 Fuji Electric Systems Co., Ltd. http:/www.fujielectric.co.jp/fdt/scd/ Contents 1. Description 4 2. Features 4 3. Outli
12、ne drawing 4 4. Block diagram 5-6 5. Functional description of pins 6 6. Rating and Characteristics 7-10 7. Characteristic curve 11-15 8. Basic operation 16 9. Description of the function 17-23 10. Method for using each pin 24-28 11. Advice for designing 29-32 12.Precautions for us 33-35 13. Example
13、 of application circuit 36 Caution) The contents of this note will subject to change without notice due to improvement. The application examples or the components constants in this note are shown to help your design, and variation of components and service conditions are not taken into account. In u
14、sing these components, a design with due consideration for these conditions shall be conducted. AN-022E Rev.1.4 January 2010 4 FA557171A72737455705671 Fuji Electric Systems Co., Ltd. http:/www.fujielectric.co.jp/fdt/scd/ 1. Overview FA5571/71A/72/73/74/70/5671 is a quasi-resonant type switching powe
15、r supply control IC with excellent stand-by characteristics. Though it is a small package with 8 pins, it has a lot of functions and enables to decrease external parts. Therefore it is possible to realize a small footprint and a high cost-performance power supply. 2. Features A quasi-resonant type switching power supply. A power supply with excellent standby characteristics. Low power consumption with a built-in startup circuit. Low current consumption, in operation: 1.35mA Built-in m
