ADUM3190BRQZ-RL7

Overview

The ADUM3190BRQZ-RL7 is a high stability isolated error amplifier based on iCoupler technology, packaged in a 16-lead QSOP. It provides a 2.5 kV rms isolation voltage rating and operates with supply voltages (VDD1, VDD2) ranging from 3 V to 20 V. The device features a 400 kHz bandwidth, a 1.225 V reference voltage, and total accuracy of 1% over the full temperature range. It draws less than 7 mA total power and supports automotive applications.

Feature Summary

• Eliminates optocoupler lifetime drift and temperature instability using iCoupler technology for stable transfer functions.
• Integrates a wideband operational amplifier and a precision 1.225 V reference for accurate feedback control.
• Provides dual isolated outputs (EAOUT and EAOUT2) compatible with Type II or Type III compensation networks.
• Includes UVLO circuits that ensure safe operation by driving outputs to high impedance during undervoltage conditions.

Applications

• Linear power supplies
• Inverters
• Uninterruptible Power Supply (UPS)
• DOSA-compatible modules
• Voltage monitors

Procurement Notes

Verify the specific suffix BRQZ-RL7 against the manufacturer's current ordering guide to confirm package type and reel quantity. Ensure the component meets the required automotive qualification standards if used in vehicle systems. Cross-reference safety approvals such as UL 1577 and IEC/EN/CSA 62368-1 with system design requirements.

Selection Notes

Select this component when superior loop stability and transient response are required compared to traditional optocoupler solutions. The 400 kHz bandwidth allows for faster reaction to load steps. Verify that the 16-lead QSOP package fits the PCB layout constraints and that the 2.5 kV rms isolation rating satisfies the system's creepage and clearance requirements.

Part Context

This part belongs to the ADuM3190 family of isolated error amplifiers designed for primary side control in isolated DC-to-DC converters. It replaces discrete shunt regulators and optocouplers to improve power density and control loop performance. The device integrates analog signal processing with digital isolation barriers on a single chip.

Replacement Considerations

Public confirmed substitute part numbers: ADUM3190TRQZ-RL7, ADUM3190WTRQZ-RL7.

FAQ

How does the ADUM3190 handle common-mode transients?

The device can withstand common-mode transients up to ±100 kV/µs across the insulation barrier without damage or latch-up.

What is the purpose of the EAOUT2 pin?

The EAOUT2 pin provides an additional isolated output with a voltage gain of approximately 2.6 relative to EAOUT, capable of driving up to 1 mA to higher voltage PWM controllers.