HCPL-788J-000E

The HCPL-788J-000E is an Isolation Amplifier with short-circuit and overload detection makes motor phase current sensing compact, affordable and easy-to-implement while satisfying worldwide safety and regulatory requirements. A larger analogue output voltage is created on the other side of this optical isolation barrier. The output voltage is proportional to the motor current and can be connected directly to a single-supply A/D converter. A digital over-range output (FAULT) and an analogue rectified output (ABSVAL) are also provided. The wire OR-able over-range output (FAULT) is useful for quick detection of short circuit conditions on any of the motor phases. The wire-OR-able rectified output, simplifies measurement of motor load since it performs poly-phase rectification. Since the common-mode voltage swings several hundred volts in tens of nanoseconds in modern electronic motor drives, this was designed to ignore very high common-mode transient slew rates (10kV/µs).

• Output voltage directly compatible with A/D converters (0V to VREF)
• Fast (3µs) short circuit detection with transient fault rejection
• Absolute value signal output for overload detection
• 1µV/°C Offset change vs. temperature
• 25kV/µs Isolation transient immunity

Applications

Motor Drive & Control, Power Management, Sensing & Instrumentation, Test & Measurement, Industrial

Warnings

ESD sensitive device, take proper precaution while handling the device. Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.