Today announced a series of three isolated pulse width modulation (PWM) controllers with integrated 5 kV isolation enabled by ADI’s award-winning iCoupler® technology. The ADP1071-1 and ADP1071-2 are isolated synchronous flyback controllers and the ADP1074 is an isolated synchronous active clamp forward controller. By integrating multiple functions such as overvoltage protection (OVP), output tracking, and light load mode for greater energy efficiency and SR Drivers, which ordinarily need several discrete components, board space is reduced by as much as 35% and system reliability greatly improved when compared to traditional approaches using optocouplers. The new PWM controllers are designed for isolated DC/DC power supplies for use in universal input off-line, industrial, or telecom power supplies. Another important feature includes secondary side communication using PGOOD to eliminate the typical isolation barrier constraints while reducing external component count.
The new devices offer a unique combination of a primary and secondary side controller with iCoupler isolation technology in a single easy-to-use package with true secondary side sensing providing all the benefits of primary and secondary side controllers in one combination. The iCoupler technology also provides high bandwidth for excellent transient response with over five times improvement and over 20% reduced output capacitance.
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