LD7532

LD7532 6/16/2008 Green-Mode PWM Controller with Latch off Protections REV: 00 General Description LD7532 is specifically designed for a low cost system by integrating in a SOT-26 package many functions, protections, and EMI-improved solution which usually need a lot of extra components or circuits on a system design. Furthermore, CT pin latch-off function triggered by a high voltage above 3.1V provides power circuit designers to easily deal with protection schemes, such as OVP and OTP, and to minimize component cost and developing time. In order to satisfy different designs, the OVP trig level is adjustable by user adding a Zener diode from VCC pin to CT pin. Typical Application Features z High-Voltage CMOS Process with ESD protection z Very Low Startup Current (<20μA) z Current Mode Control z Non-audible-noise Green Mode Control z UVLO (Under Voltage Lockout) on VCC Pin z LEB (Leading-Edge Blanking) on CS Pin z Programmable OLP Delay Time z Internal Slope Compensation z External OVP Latch-off Protection z OLP (Over Load Protection) Auto-recovery Mode z External OTP Latch-off Protection z 300mA Driving Capability Applications z Switching AC/DC Adaptor and Battery Charger z Open Frame Switching Power Supply Leadtrend Technology Corporation LD7532-DS-00 June 2008 1 www.leadtrend.com.tw Pin Configuration LD7532 GND COMP NC CT DIP-8 (TOP VIEW) 8 76 5 TOP MARK YYWW## 1 23 4 SOT-26 (TOP VIEW) OUT VCC CS 65 YWP 32 12 4 3 GND COMP CT OUT VCC NC CS YY, Y : Year code (D: ...