LD7535B Datasheet | Leadtrend Technology

Description The LD7535B is a low cost, low startup current, current mode PWM controller with green-mode power-saving operation. The integrated functions include the leading-edge blanking of the current sensing, internal slope pensation and the tiny package of SOT-26. It would provide the users a superior AC/DC power application of higher efficiency, low external ponent counts, and lower cost solution for applications. In paring with the previous generations like LD755X, the LD7535B features more protections or functions for the following characteristics --- z Add OLP (Over Load Protection) function to provide better protection performance for fault conditions like short circuit or over load. z Modify the OVP (Over Voltage Protection) mechanism from the cycle-by-cycle mode to the hiccup mode. Features z High-Voltage CMOS Process with Excellent ESD protection z Very Low Startup Current (<20μA) z Current Mode Control z Non-audible-noise Green Mode Control z UVLO (Under Voltage Lockout) z LEB (Leading-Edge Blanking) on CS Pin z Programmable Switching Frequency z Internal Slope pensation z OVP (Over Voltage Protection) on Vcc Pin z OLP (Over Load Protection) z 300m A Driving Capability Applications z Switching AC/DC Adaptor and Battery Charger z Open Frame Switching Power Supply z 384X Replacement Typical Application Leadtrend Technology Corporation LD7535B-DS-01a March 2008 .leadtrend..tw Pin Configuration SOT-26 (TOP VIEW) OUT VCC CS 65 4 Y WP 35B GND P RT Y The PB free package is identified in embossed font while green package in regular font. Y : Year code (D: 2004, E: 2005…..) W : Week code P : LD75.. (Product family code) Ordering Information Part number Package TOP MARK LD7535B GL SOT-26 Green Package YWP/35B LD7535B PL SOT-26 PB Free YWP/35B The LD7535B is ROHS plaint/ Green Package. Shipping 3000 /tape & reel 3000 /tape & reel Pin Descriptions PIN NAME FUNCTION 1 GND Ground Voltage feedback pin (same as the P pin in UC384X),...