1.0 Features
● Fast voltage undershoot detection
● “Normally-OFF” with <100μA cut-off current during normal operation
● Wide operating voltage range from 2.5V to 15V at DRV pin
● Built-in opto-coupler LED driver with minimum driving current of 2mA
● Wide operating temperature range from -40°C to 150°C
2.0 Description
The iW628 is an adaptive voltage position monitor to detect
voltage undershoot. It can be used in Dialog’s primaryside
control systems to achieve ultra-low no-load power
consumption and fast dynamic load response. The iW628
operates at “normally-OFF” mode with negligible power
consumption during power supply normal steady state
operation, while monitoring dynamic load change through
a user-configurable voltage position sense pin. The iW628
eliminates loop compensation components at the secondary
side and it has a built-in opto-coupler LED driver to minimize
the bill of material cost.
Dialog’s innovative proprietary technology ensures that
power supplies designed with the iW628 and Dialog’s
primary-side controller can achieve less than 10mW noload
power consumption in typical 5V2A AC/DC charger/
adapter designs and less than 20mW for 12V2A designs
while maintaining fast dynamic load response.
3.0 Applications
● Precision voltage reference
● AC/DC chargers/adapters