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LD7523GS Datasheet(PDF) 1 Page - Leadtrend Technology |
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LD7523GS Datasheet(HTML) 1 Page - Leadtrend Technology |
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1 / 18 page  LD7523 6/16/2009 1 Leadtrend Technology Corporation www.leadtrend.com.tw LD7523-DS-00 June 2009 Smart Green-Mode PWM Controller with Multiple Protections REV: 00 General Description The LD7523 is a low startup current, current mode PWM controller with green-mode power-saving operation. The SOP-8/DIP-8 package integrated functions such as the leading- edge blanking of the current sensing, internal slope compensation, line compensation, and several protection features. The protection functions include cycle-by-cycle current limit, OVP, OLP, and brownout protection. It provides the users a high efficiency, low external component counts solution for AC/DC power applications. Furthermore, to satisfy various protection requirements, both latch-mode protection and auto-recoverable protection can be easily achieved by configuring LD7523 on different operation modes. The special green-mode control is not only to achieve the low power consumption but also to offer a non-audible-noise operation when the LD7523 is operating under light load or no load condition. Features High-Voltage CMOS Process with Excellent ESD protection Very Low Startup Current (< 35 μA) Current Mode Control Non-audible-noise Green Mode Control UVLO (Under Voltage Lockout) LEB (Leading-Edge Blanking) on CS Pin Internal Slope Compensation Programmable Line Compensation OVP (Over Voltage Protection) OLP (Over Load Protection) Brownout Protection Built in OLP De-Latch Timer 500mA Driving Capability Applications Switching AC/DC Adaptor and Battery Charger Open Frame Switching Power Supply LCD Monitor/TV Power Typical Application EMI Filter BNO OUT CS VCC GND COMP LD7523 photocoupler AC input TL431 OVP |
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