OB2510R数据手册OB中文资料规格书

描述 Description

B2510R is a high performance offline PSR controller for low power AC/DC charger and adapter applications. It operates in primary-side sensing and regulation. Consequently, opto-coupler and TL431 could be eliminated. Proprietary Constant Voltage (CV) and Constant Current (CC) control is integrated as shown in the figure below.\r
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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. The chip consumes very low operation current, it can achieve less than 75mW standby power.\r
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OB2510R offers comprehensive protection coverage with auto-recovery features including Cycle-by-Cycle current limiting, VDD over voltage protection, short circuit protection, built-in leading edge blanking, VDD under voltage lockout (UVLO), OTP etc.\r
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OB2510R is offered in SOT23-5 package.

特性 Features

• Primary-side Sensing and Regulation Without TL431 and Opto-coupler\r
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• High Precision Constant Voltage and Current Regulation at Universal AC Input\r
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• Multi-mode PWM/PFM operation for efficiency improving\r
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• Good dynamic response\r
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• Programmable CV and CC Regulation\r
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• Built-in Line Voltage and Primary Winding Inductance Compensation\r
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• Programmable Cable Drop Compensation\r
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• No Need For Control Loop Compensation\r
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• Audio Noise Free Operation\r
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• Drive BJT Switch\r
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• Built-in Leading Edge Blanking (LEB)\r
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• Comprehensive Protection Coverage with auto-recovery\r
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l VDD Over Voltage Protection\r
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l VDD Under Voltage Lockout with Hysteresis (UVLO)\r
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l Cycle-by-Cycle Current Limiting\r
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l Feedback Loop Open Protection\r
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l Output Short Circuit Protection\r
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l Over Temperature Protection (OTP)

应用 Application

Low Power AC/DC offline SMPS for\r
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• Cell Phone Charger\r
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• Digital Cameras Charger\r
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• Small Power Adapter\r
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• Auxiliary Power for PC, TV etc.\r
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• Linear Regulator/RCC Replacement