**ADUM4190BRIZ: A High-Performance Isolated Error Amplifier for Power Supply Feedback Control**

In the realm of power electronics, achieving precise and stable output voltage regulation is paramount. This becomes particularly challenging in systems requiring galvanic isolation between the primary and secondary sides, such as in industrial motor drives, renewable energy inverters, and telecommunications power systems. The **ADUM4190BRIZ** from Analog Devices stands out as a **high-performance, isolated error amplifier** specifically engineered to address these critical design challenges in power supply feedback control loops.

Traditional optocoupler-based isolation methods, while common, suffer from significant limitations. They exhibit **non-linear gain, limited bandwidth, and aging effects** that can degrade system performance over time, leading to poorer regulation and reduced reliability. The ADUM4190BRIZ overcomes these drawbacks by leveraging Analog Devices' proprietary iCoupler® technology. This advanced approach integrates a precision error amplifier with a high-speed, isolated data channel on a single monolithic IC.

The core function of the ADUM4190BRIZ is to accurately sample the output voltage on the isolated secondary side of a power supply, compare it to a precise internal reference, and then transmit the amplified error signal across the isolation barrier to the primary-side controller. This creates a tightly regulated, closed-loop system. Key to its performance is its **exceptional linearity and stable gain over temperature and time**, which are unattainable with optocouplers. Furthermore, it offers a **wide bandwidth of up to 400 kHz**, enabling designers to implement faster control loops for improved transient response and stability.

The device provides reinforced isolation of up to 5 kV RMS, making it suitable for high-voltage applications and enhancing overall system safety. Its integrated architecture also simplifies design, reduces component count, and increases reliability by eliminating the need for a separate isolated power supply for the secondary-side amplifier and the associated optocoupler.

In summary, the ADUM4190BRIZ represents a significant leap forward in feedback control design. It delivers the accuracy, stability, and speed necessary for next-generation power supplies, all while simplifying system architecture and improving long-term reliability.

**ICGOODFIND**: The ADUM4190BRIZ is an optimal solution for engineers seeking to enhance the performance and reliability of isolated switching power supplies, offering superior precision and stability over traditional optocoupler-based methods.

**Keywords**: Isolated Error Amplifier, Power Supply Feedback, iCoupler Technology, Galvanic Isolation, Voltage Regulation.