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have demonstrated the ability to withstand a remarkable 800 Vac or 1,130 Vdc between the input and output pins indefinitely without damage (the endurance voltage).
Thats the equivalent of 753 D-cells, which would make a flashlight 150 feet long.
For more information, see From the Application Desk at right.
Currently playing on our phone system background is the theme music from Speed, the 1994 movie.|
The theme highlights the remarkable speed of NVE Isolators.
The background music is selected to complement the benefits of NVE products (see the playlist).
Wide-Body SOIC-16 Isolators
A full eight millimeter external creepage distance for the most demanding high-voltage performance. IsoLoop Isolators offer a full product line in wide-body SOIC packages, providing 2,500 Vrms isolation voltage, 300 Vrms working
voltage, and 800 Vrms endurance voltage (see From the Applications Desk below).
Wide-body isolators are available in a variety of input, output, and channel configurations,
as well as a full line of isolated RS-485/RS-422/PROFIBUS transceivers. Key features include:
8 mm External Creepage Distance
3, 4, or 5 Channels, or RS-485/RS-422
Passive or Digital Inputs
CMOS or Open-drain Outputs
Up to 125°C (T-Series)
UL1577 / IEC 61010-2001
More than 25 wide-body SOIC isolators part types are currently
in stock and available for immediate delivery with no minimum order:
|Input||Key Features|| Max.|
|IL514||2||2/1||Digital||DC correct; Output Enable||85°C|
|IL515||2||4/0||Digital||DC correct; Optional Ext. Clock||85°C|
|IL613||100||3/0|| Passive ||85°C|
| IL614||100||2/1||Passive||Output Enable||85°C|
|IL3122||5||RS-422||Passive||32 nodes; 15 kV Bus ESD||85°C|
| IL3185||5||RS-485||Passive||32 nodes; 15 kV Bus ESD||85°C|
|IL3222||5||RS-422||Passive||Fractional Load (256 nodes)||85°C|
|IL3285||5||RS-485||Passive||Fractional Load (256 nodes)||85°C|
|IL3422||20||RS-422||Passive||32 nodes; 15 kV Bus ESD||85°C|
|IL3485||20||RS-485||Passive||32 nodes; 15 kV Bus ESD||85°C|
| IL422||25||RS-422||Digital||Industry Standard||85°C|
| IL485W ||35||RS-485||Digital||RS-485 + handshake||85°C|
|IL3522||40||RS-422|| Digital||Very High Speed||85°C|
|IL3585||40||RS-485||Digital||Very High Speed||85°C|
|From the Application Desk|
Real-world questions from the NVE Application Desk|
By Sandy Volt Templeton
Director, Isolator Product Development and Applications
Q. I know the isolation voltage for most IsoLoops is 2,500 Vrms for one minute, but what can they withstand continuously?
A. The maximum voltage that can be applied between the input and output pins of an isolator indefinitely without damage is called endurance voltage. Endurance voltage is typically not specified in data sheets and may be the least well-known high-voltage specification. Nevertheless, it is useful in applications where the isolators are not subject to line voltage transients. The endurance voltage for IsoLoop Isolators has been determined to be 800 Vrms based on qualification testing.
This battery management system for measuring the voltage of each battery cell of a DC to AC inverter illustrates an application where endurance voltage is important:
Isolated Battery Management System
The last isolation stage is a full 300 V above the controller ground, so the isolator is subject to 300 V between inputs and outputs.
Because the isolators have an endurance voltage of 800 Vrms, or 1,130 Vpeak, the isolators can be expected to withstand up to 1,130 Vdc indefinitely, and will easily withstand the voltages in the circuit above.
<More Info (.pdf; Application Bulletin No. 18)>