LD7932R

LD7932R 06/19/2012 Green Mode Off-line Power Switch with Brown-Out Protections REV.00 General Description The LD7932R integrates with a 700V power MOSFET and a current mode PWM controller in a DIP-7 package. It takes less components counts or circuit space, especially ideal for those total solutions of low cost. The implemented functions include low startup current, green-mode power-saving operation, leading-edge blanking of the current sensing and internal slope compensation. It also features more protections like OLP (Over Load Protection) and OVP (Over Voltage Protection) to prevent circuit from being damaged under abnormal conditions. Furthermore, the Frequency Swapping function is to reduce the noise level and thus helps the power circuit designers to easily deal with the EMI filter design by spending minimum amount of component cost and developing time. Features  Built-in 700V Power MOSFET  High-Voltage CMOS Process with Excellent ESD Protection  Very Low Startup Current (<17A)  Current Mode Control  Green Mode Control  UVLO (Under Voltage Lockout)  LEB (Leading-Edge Blanking) on CS Pin  Internal Frequency Swapping  Internal Slope Compensation  OVP (Over Voltage Protection) on Vcc Pin  Brownout Protection  OLP (Over Load Protection) Applications  Switching AC/DC Adaptor  Open Frame Switching Power Supply Typical Application AC input EMI Filter BNO VCC Drain LD7932R COMP S GND DC Output photocoupler Leadtrend Technology Corporation LD7932R-DS...