IW1689

Not Recommended For New Designs iW1689 Low-Power Off-line Digital PWM Controller 1.0 Features Primary-side feedback eliminates opto-isolators and simplifies design Multi-mode operation for highest overall efficiency Very tight output voltage regulation No external compensation components required Complies with CEC/EPA/IEC no load power consumption and average efficiency regulations Built-in secondary constant-current control with primaryside feedback Low start-up current (8 µA typical) Built-in soft start Built-in short circuit protection AC line under/overvoltage and output overvoltage protection Fixed switching frequency Available in a space-saving SOT-23 package 2.0 Description The iW1689 is a high performance AC/DC power supply controller which uses digital control technology to build sensorless peak current mode PWM flyback power supplies. The device provides high efficiency along with a number of key built-in prote...