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 but also to offer a
non-audible-noise operation when the LD7523 is
operating under light load or no load condition.

Features
z High-Voltage CMOS Process with Excellent ESD
protection
z Very Low Startup Current (< 35μA)
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 Internal Slope Compensation
z Programmable Line Compensation
z OVP (Over Voltage Protection)
z OLP (Over Load Protection)
z Brownout Protection
z Built in OLP De-Latch Timer
z 500mA Driving Capability

Applications
z Switching AC/DC Adaptor and Battery Charger
z Open Frame Switching Power Supply
z LCD Monitor/TV Power