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OB2520 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.
Features:
＃ Ultra Low Standby Power
＃ ＼5% Constant Voltage Regulation at Universal AC input
＃ High precision Constant Current 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
＃ Driver BJT Switch
＃ Ultra Low Start-up Current (Typ. 1uA)
＃ VDD Over Voltage Protection
＃ Built-in Feedback Loop Open Protection
＃ Built-in Short Circuit Protection
＃ Built-in Leading Edge Blanking (LEB)
＃ Cycle-by-Cycle Current Limiting
＃ VDD Under Voltage Lockout with Hysteresis (UVLO)
＃ Available in SOT23-6 package, RoHS compliant
Applications:
＃ Cell Phone Charger
＃ PMP Adapter/Charger
＃ Small Power Adapter
＃ Auxiliary Power for PC, TV etc.
＃ Linear Regulator/RCC Replacement
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Device
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Driver Switch
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OB2520
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BJT
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5
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OB2520D
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BJT
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5
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OB2520M
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MOSFET
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8
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Typical Application:
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