R7731A Datasheet | Richtek

Description The R7731A is a high-performance, low cost, low start-up current and current mode PWM controller with burst triple mode to support green mode power saving operation. The R7731A integrates functions of soft start, Under Voltage Lock Out (UVLO), Leading Edge Blanking (LEB), Over Temperature Protection (OTP) and internal slope pensation. It provides the users a superior AC/DC power application of higher efficiency, low external ponent counts and lower cost solution. To protect the external power MOSFET from being damaged by supply over voltage, the R7731A output driver is clamped at 12V. Furthermore, R7731A features fruitful protections like Over Load Protection (OLP) and Over Voltage Protection (OVP) to eliminate the external protection circuits and provide reliable operation. R7731A is available in SOT-23-6 and DIP-8 packages. Ordering Information Package Type E : SOT-23-6 N : DIP-8 Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020. ` Suitable for use in Sn Pb or Pb-free soldering processes. Features z Very Low Start-up Current (<30μA) z 10/14V UVLO z Soft Start Function z Current Mode Control z Jittering Switching Frequency z Internal Leading Edge Blanking z Built-in Slope pensation z Burst Triple Mode PWM for Green-Mode z Cycle-by-Cycle Current Limit z Feedback Open Protection z Over Voltage Protection z Over Temperature Protection z Over Load Protection z Soft Driving for Reducing EMI z Driver Capability ±200m A z High Noise Immunity z Opto-Coupler Short Protection z Ro HS pliant and Halogen Free Applications z Adaptor and Battery Charger z ATX Standby Power z Set-Top Box (STB) z DVD and CD(R) z TV/Monitor Standby Power z PC Peripherals Marking Information R7731AGE IDP=W IDP= : Product Code W : Date Code R7731AGE Rich Tek R7731A GNYMDNN R7731AGN : Product Number YMDNN : Date Code R7731A-10 August 2011 .richtek....