IZL-200
Isolated Error Amplifier for DCDC Feedback
Analog Isolators
Error Amplifier
Engineering Samples
Features
- Bandwidth 400 kHz
- Total Current Consumption (IDD1 + IDD2) < 6.5 mA
- Stability In Isolated Feedback Applications 0.5 % accuracy
- Compatible with Type II or Type III compensation networks
- 4000 V Peak Isolation (60s)
- >200 kV/µs Transient Immunity
- Functional Double Capacitive Isolation
- High Electromagnetic Immunity
- <0.5pF Total Isolation Capacitor
- 2kV ESD Protection
- Wide Temperature Range -55°C to 150°C
- Reference Voltages: 1.2 V
- Standard SOIC-16 Package (300 mils wide body)
Applications
- DC-DC Switched Power Supplies
- EV/HEV Battery Charger
- High-Voltage Motor Control
- High-Voltage Inverters
- Voltage monitors
- High-Temperature Environments
Description
The IZL-200 is an isolated error amplifier based on VDDTECH’s capacitive isolation technology. The IZL-200 is ideal for linear feedback power supplies. The primary side controllers of the IZL-200 enables improvements in transient response, precision, 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 IZL-200 transfer function does not change over its lifetime, and it is stable over a wide temperature range of -55°C to +150°C. Included in the IZL-200, is a wideband operational amplifier for a variety of commonly used power supply loop compensation techniques. The IZL-200 allows a feedback loop to react to fast transient conditions and overcurrent conditions. Also included is a 1.2 V reference to compare with the supply output setpoint. The IZL-200 is packaged in a 16-lead wide SOIC package for a 4 kV isolation voltage rating.
Demo boards with the IZL-200
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EVK01
Isolated high-voltage buck-converter evaluation board.
It highlights the use of VDDTECH’s IZL-100 digital isolator, IZL-200 error amplifier and NZL-300 transformer driver.