IW1692 Datasheet | iWatt

Not Remended For New Designs i W1692 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 - Built-in cable drop pensation - Very tight output voltage regulation - No external loop pensation ponents required - plies with CEC/EPA/IEC no load power consumption and average efficiency regulations - Built-in output constant-current control with primary-side feedback - Low start-up current (10 µA typical) - Built-in soft start - Built-in short circuit protection - AC line under/overvoltage and output overvoltage protection - 40 k Hz PWM switching frequency - PFM operation at light load - Built-in ISENSE pin short protection - Space-saving SOT-23 package 2.0 Description The i W1692 is a high performance AC/DC power supply controller which uses digital control technology to build peak current mode PWM flyback power supplies. The device provides high efficiency along with a number of key built-in protection Features while minimizing the external ponent count and bill of material cost. The i W1692 removes the need for secondary feedback circuitry while achieving excellent line and load regulation. It also eliminates the need for loop pensation ponents while maintaining stability over all operating conditions. Pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. The built-in power limit function enables optimized transformer design in universal off-line applications and allows for a wide input voltage range. The low start-up power and PFM operation at light load ensure that the i W1692 is ideal for applications targeting the newest regulatory standards for standby power. 3.0 Applications - Low power AC/DC adapter/chargers for cell phones, PDAs, digital still cameras - Standby supplies for televisions, DVDs,...