iW1830
Off-Line Digital Green-Mode Quasi-Resonant
PWM Controller Integrated with Power MOSFET
Rev. 1.0Product Summary
© 2016 Dialog Semiconductorwww.dialog-semiconductor.com 1 of 6
23-August-2016
1 Description
The iW1830 is a high performance AC/DC power supply control device that uses digital control
technology to build peak current mode PWM yback power supplies. The device includes an internal
power MOSFET and operates in quasi-resonant mode and includes key built-in protection features.
This combination of features and integration simplies design, improves efciency, reduces EMI and
lowers the bill of material cost.
The iW1830 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 over all operating
conditions. The 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.
Dialog’s innovative proprietary technology ensures that power supplies built with the iW1830 can achieve both the
highest average efciency and less than 50mW no-load power consumption in the 15W output power range, and have
2 Features
● PrimAccurate™ primary-side feedback eliminates
opto-isolators and simplies design
● Integrated 700V power MOSFET
● Tight constant-voltage regulation across line and load
range
● Proprietary optimized 79kHz maximum PWM switching
frequency with quasi-resonant operation achieves best
size, efciency and common mode noise
● No-load power consumption < 50mW at 230V
AC
along
with fast dynamic load response and short turn-on
delay in typical 15W adapter applications
3 Applications
● Home appliances
● Power adapters for network devices and monitors
● Universal input AC/DC adapters (up to 15W)
● Adaptively controlled soft-start enables fast and
smooth start-up for a wide range of capacitive loads
(from 330μF to 6,000μF) with output voltage of 12V
and above
● EZ-EMI
®
design enhances manufacturability
● Adaptive multi-mode PWM/PFM control improves
efciency
● Built-in single-point fault protections against output
short-circuit, output over-voltage and output over-
current
● Built-in over-temperature protection (OTP)
● No audible noise over entire operating range
