The ADuM4190 is an isolated error amplifier based on ADI, iCoupler® technology. The ADuM4190 is ideal for linear feedback power supplies. The primary side controllers of the ADuM4190 enable improvements in transient response, power density, and stability as compared to commonly used optocoupler and shunt regulator solutions.
Unlike optocoupler-based solutions, which have an uncertain current transfer ratio over lifetime and at high temperatures, the ADuM4190 transfer function does not change over its lifetime and is stable over a wide temperature range of −40°C to +125°C.
Included in the ADuM4190 is a wideband operational amplifier for a variety of commonly used power supply loop compensation techniques. The ADuM4190 is fast enough to allow a feedback loop to react to fast transient conditions and overcurrent conditions. Also included is a high accuracy 1.225 V reference to compare with the supply output setpoint.
The ADuM4190 is packaged in a wide body, 16-lead SOIC package for a reinforced 5 kV rms isolation voltage rating.
Applications
Linear feedback power supplies
Inverters
Uninterruptible power supplies (UPS)
DOSA-compatible modules
Voltage monitors
### Features and Benefits
Stable over time and temperature
0.5% initial accuracy
1% accuracy over the full temperature range
Compatible with Type II or Type III compensation networks
Reference voltage: 1.225 V
Compatible with DOSA
Low power operation: <7 mA total
Wide voltage supply range: 3.0 V to 20 V (VDD1 and VDD2)
Output -3 dB bandwidth: 400 kHz typical
Isolation voltage: 5 kV rms reinforced
See data sheet for additional features
**ADuM4190-EP supports defense and aerospace applications (ADEQ standard)**
