LD7523

LD7523 6/16/2009 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 operation but also the to offer a is non-audible-noise when LD7523 Features z z z z z z z z z z z z z High-Voltage CMOS Process with Excellent ESD protection Very Low Startup Current (< 35μA) 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 z z z Switching AC/DC Adaptor and Battery Charger Open Frame Switching Power Supply LCD Monitor/TV Pow...