Isolation Amplifiers protect against overload conditions.
January 21, 2009 -
Based on optical insulation technology and sigma-delta modulation for signal processing, ACPL-785J Series allows direct measurement of motor phase currents in power inverters. Units feature minimum bandwidth of 20 kHz and integrated over-current and overload detection. Housed in SO-16 package with 10.3 x 10.2 x 3.5 mm footprint, amplifiers are suited for inverter current sensing, motor phase and rail current sensing, and switching power supply signal isolation.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Avago Technologies
350 West Trimble Road, Building 90
San Jose, CA, 95131
USA
Avago Technologies Adds New Series of Isolation Amplifiers with Short Circuit and Overload Detection
Low-Cost Isolation Amplifier Series Delivers Enhanced Protection from Over-Current and Overload Conditions in Motor Drive Apps
SAN JOSE, Calif., Jan. 13, 2009 -- Avago Technologies, a leading supplier of analog interface components for communications, industrial and consumer applications, today announced a new series of competitively priced isolation amplifiers with short circuit and overload detection. Based on optical insulation technology and sigma-delta modulation for signal processing, Avago's ACPL-785J isolation amplifiers allow direct measurement of motor phase currents in power inverters. Typical applications include inverter current sensing, motor phase and rail current sensing, switching power supply signal isolation, industrial A/D converters and general-purpose current sensing and monitoring.
Motor control power stages require a combination of current sensing and power device protection to achieve accurate fail-safe motor operation. These current sensors, which feedback the motor phase or rail current to the microcontroller, are typically optimized for accuracy to provide precise control. Once a fault condition has been detected, the power device circuitry shuts off the device to prevent destruction of the power device and load.
Avago's ACPL-785J series of isolation amplifiers come in a compact small outline-16 (SO-16) package with a footprint that is 10.3 mm (L) by 10.2 mm (W) by 3.5 mm (H). The addition of the ACPL-785J to its existing HCPL-78xx family of isolation amplifiers will enable motor control designers to reduce the printed circuit board (PCB) size required for their designs. These new SO-16 packages are compliant to most industrial safety standards such as IEC/EN/DIN EN 60747-5-5, UL 1577 and CSA.
Features and Benefits
o Integrated over-current and overload detection
o 1µV/degrees-C offset change vs. temperature
o High CMR (25 kV/µs at VCM = 1000 V) to ignore high common-mode noise and provide smoother control
o Compact auto-insertable SO-16 package saves PCB space
o 20 kHz minimum bandwidth
o Advanced Sigma-Delta A/D converter technology
Pricing and Availability
Pricing for Avago's ACPL-785J isolation amplifiers are priced at $3.25 in 10,000 piece quantities, and are available now through Avago's direct sales channel and worldwide distribution partners. More information on Avago's isolation amplifiers can be found at www.avagotech.com/optocouplers.
About Avago Technologies
Avago Technologies is a leading supplier of analog interface components for communications, industrial and consumer applications. By leveraging its core competencies in III-V compound and silicon semiconductor design and processing, the company provides an extensive range of analog, mixed signal and optoelectronics components and subsystems to approximately 40,000 end customers. Backed by strong customer service support, the company's products serve four diverse end markets: industrial and automotive electronics, wired infrastructure, wireless communications, and consumer and computer peripherals. Avago has a global employee presence and heritage of technical innovation dating back 40 years to its Hewlett-Packard roots. Information about Avago is available on the Web at www.avagotech.com
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies. All other trademarks are the property of their respective owners.
NOTE TO EDITORS: Please direct reader inquiries to Avago Technologies at +1 800 235 0312, or e-mail us at support@avagotech.com.
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