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FA5639 Dataheets PDF



Part Number FA5639
Manufacturers Fuji
Logo Fuji
Description Switching Power Supply Control IC
Datasheet FA5639 DatasheetFA5639 Datasheet (PDF)

FA5639 Fuji Switching Power Supply Control IC Green Mode PWM-IC FA5639 Application Note April-2011 Fuji Electric co.,Ltd. Fuji Electric Co., Ltd. AN-085E Rev.1.0 Apr-2011 1 http://www.fujielectric.co.jp/products/semiconductor/ FA5639 Caution 1. The contents of this note (Product Specification, Characteristics, Data, Materials, and Structure etc.) were prepared in April 2011. The contents will subject to change without notice due to product specification change or some other reasons. In ca.

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FA5639 Fuji Switching Power Supply Control IC Green Mode PWM-IC FA5639 Application Note April-2011 Fuji Electric co.,Ltd. Fuji Electric Co., Ltd. AN-085E Rev.1.0 Apr-2011 1 http://www.fujielectric.co.jp/products/semiconductor/ FA5639 Caution 1. The contents of this note (Product Specification, Characteristics, Data, Materials, and Structure etc.) were prepared in April 2011. The contents will subject to change without notice 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 shall neither assure to enforce the industrial property including some other rights nor grant the license. 3. Fuji Electric 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 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 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 robot 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 the 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 - Various 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 or copying all or a part of this note, our company’s acceptance in writing shall be obtained. 8. If obscure parts are found in the contents of this note, contact Fuji Electric Co.,Ltd. or a sales agent before using our products. Fuji Electric Co.,Ltd. and its sales agents shall not be liable for any damage that is caused by a customer who does not follow the instructions in this cautionary statement. Fuji Electric Co., Ltd. AN-085E Rev.1.0 Apr-2011 2 http://www.fujielectric.co.jp/products/semiconductor/ FA5639 Contents 1. Overview 2. Features 3. Outline drawing 4. Block diagram 5. Functional description of pins 6. Rating & Characteristics 7. Characteristic curve 8. Operation of each block 9. Advice for designing 10. Application circuit example ···················································4 ···················································4 ···················································4 ···················································5 ···················································6 ···················································6 to 9 ···················································10 to 12 ···················································13 to 17 ···················································18 to 20 ···················································21 Caution) ・ The contents of this note subject to change without notice due to improvement. ・ The application examples or the parts constants in this note are shown to help your design. Variation of parts and service condition are not fully taken into account. Before use, a design with due consideration for these variations and conditions shall be conducted. Fuji Electric Co., Ltd. AN-085E Rev.1.0 Apr-2011 3 http://www.fujielectric.co.jp/products/semiconductor/ FA5639 1. Overview FA5639 is a current mode type switching power supply control IC possible to drive a power MOSFET directly. Despite of a small package with 8 pins, it has a lot of functions and it is best suited for power saving at the light load and decreasing external parts. Moreover it enables to realize a reduced space and a high cost-performance power supply. 2. Features ・Excellent Power Saving by lowering the oscillation frequency depending on the load at light load. ・Low power consumption by a built-in startup circuit. ・Overload protection function with a few number of external components. ・Current Minus detection. Power Saving of the revision of the input voltage of OLP. .


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