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iW1819

Renesas
Part Number iW1819
Manufacturer Renesas
Description Quasi-Resonant PWM Controller
Published Sep 9, 2023
Detailed Description iW1819 18W AccuSwitchTM Quasi-Resonant PWM Controller with Integrated 800V Power BJT 1 Description The iW1819 integrates...
Datasheet PDF File iW1819 PDF File

iW1819
iW1819

Overview
iW1819 18W AccuSwitchTM Quasi-Resonant PWM Controller with Integrated 800V Power BJT 1 Description The iW1819 integrates a high performance AC/DC power supply controller using digital control technology and a power BJT switch in one package to enable compact peak current mode PWM flyback power supplies.
The device operates in quasi-resonant mode and features multiple key protection features, allowing designs with improved efficiency and lower EMI, while lowering the bill of material cost.
The iW1819 features a distinctive soft-start scheme, which allows for fast and yet smooth start-up with both small and large capacitive loads.
It removes the need for a secondary feedback circuit while achieving excellent line and load regulation.
It also eliminates the need for loop compensation components while maintaining stability across all operating conditions.
The pulse-by-pulse waveform analysis allows for fast dynamic load response.
The built-in power limit function enables optimized transformer design for a wide input voltage range.
Dialog’s innovative, proprietary technology ensures that power supplies built with the iW1819 can achieve both the highest average efficiency and less than 30mW no-load power consumption.
And, the iW1819 can start-up into a wide range of capacitive loads at 5V to 12V or higher output voltages, making it ideal for networking, set-top box and home appliance power supply applications.
2 Features ■ Optimized for 12V/1.
5A AC/DC adapters with < 30mW no-load power consumption at 230VAC and fast dynamic response ■ AccuSwitch™ technology − integrated 800V bipolar junction transistor (BJT) ■ Adaptively controlled soft-start enables fast and smooth start-up for a wide range of capacitive loads (from 330μF to 6,000μF) ■ Very tight constant voltage and constant current regulation over entire operating range ■ PrimAccurate™ primary-side feedback eliminates optocoupler and simplifies design ■ EZ-EMI™ design enhances manufacturability ■ Intrinsically low co...


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