iW3620 Datasheet | Renesas

i W3620 Digital PWM Current-Mode Controller for AC/DC LED Driver 1.0 Features - Primary-side feedback eliminates opto-isolators and simplifies design - Quasi-resonant operation for highest overall efficiency - EZ-EMI ® design to easily meet global EMI standards - Up to 130 k Hz switching frequency enables small adapter size - Very tight LED constant current regulation - No external pensation ponents required - Built-in output constant-current control with primary-side feedback for LED driver. - Low start-up current (10 µA typical) - Built-in soft start - Built-in short circuit protection and output overvoltage protection - Current sense resistor short protection - Overtemperature Protection - Open circuit protection - Universal input range from 85 Vac to 264 Vac - Single-fault protection - Small input bulk capacitor - Long MTBF 2.0 Description The i W3620 is a high performance AC/DC offline LED driver which uses digital control technology to build peak current mode PWM flyback power supplies. The device operates in quasi-resonant mode at heavy load to provide high efficiency along with a number of key built-in protection Features while minimizing the external ponent count, simplifying EMI design and lowering the total bill of material cost. The i W3620 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-bypulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. The built-in current limit function enables optimized transformer design in universal off-line applications over a wide input voltage range. 3.0 Applications - LED lighting - High efficiency + N VOUT + + RTN Optional...