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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WS3252 датащи(PDF) 1 Page - Shenzhen Winsemi Microelectronics Co., Ltd |
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WS3252 датащи(HTML) 1 Page - Shenzhen Winsemi Microelectronics Co., Ltd |
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1 / 8 page  Copyright@Winsemi Microelectronics Co., Ltd., All right reserved. WS3252 WS3252 WS3252 WS3252 Rev.A Sep.2011 Features Features Features Features ■ 5uA ultra-low startup current ■ 2mA Low operating current ■±5% Constant Voltage Regulation at Universal AC input ■ Primary-side Sensing and Regulation Without TL431 and Opto-coupler ■ Programmable CV and CC Regulation ■ Built-in Primary winding inductance compensation ■ Programmable cable drop compensation ■ Built-in soft start ■ Built-in Leading-edge blanking ■ Cycle by cycle over current protection (OCP) ■ VCC over voltage clamp & under voltage lockout( UVLO) ■ Maximum Gate output voltage clamped at 12V ■ Frequency jittering Applications Applications Applications Applications Low power AC/DC offline SMPS for ■ Cell Phone Charger ■ Digital Cameras Charger ■ Small Power Adapter ■ Auxiliary Power for PC, TV etc. ■ Linear Regulator/RCC Replacement Typical Typical Typical Typical Application Application Application Application Circuit Circuit Circuit Circuit WS3252 is a high-integrated offline PWM controller, optemized for high poformance low power AC/DC charger and adapter adapter application. WS3252 operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated, thus reduce the cost. It can achieve ± 5% constant voltage precision in full input voltage range. CC/CV Control as shown in fig.1.In CC Control, the current and output power setting can be adjusted externally by the sense resistor Rs at CS pin. In CV control, multi-mode operations are utilized to achieve high performance and high efficiency. In addition, good load regulation is achieved by the built-in cable drop compensation. Device operates in PFM in CC mode as well at large load condition and it operates in PWM with frequency reduction at light/medium load. WS3252 offers power on soft start control and protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VCC OVP,VCC clamp and UVLO. The gate-driven output is clamped to maximum 12V to protect the internal MOSFET. Excellent EMI performance is achieved by using the soft-switching and frequency jittering at the totem-pole-gate-drive output. The WS3252 is the ideal substitute of the linear power supply or the RCC-mod e power, for a better performance of the whole switch power system and a lower cost. WS3252 is available in SOT23-6 package. WS3252 High Precision CC/CV Primary-Side PWM Controller V o I o 5 % I c c General General General General Description Description Description Description |
Аналогичный номер детали - WS3252 |
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Аналогичное описание - WS3252 |
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