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ON Semi introduces linear constant current regulators

ON Semiconductor has introduced the NSI45 series of two-terminal linear constant current regulators for driving current in automotive and other LED lighting applications.

Dan Huettl, director and general manager for ON Semiconductor’s Small Signal Division, said the constant current regulators are based on patent-pending, self-biased transistor technology. By regulating voltage over a wide range, the devices ensure constant brightness over the operating voltage range. The series is designed with a negative temperature coefficient to protect LEDs from thermal runaway at extreme voltage and operating temperatures.

The NSI45 series is offered in 20 milliamp (mA), 25 mA and 30 mA device options in SOD-123 and SOT-223 packages. The devices are available in ±10% and ±15% steady-state regulated current (Ireg) tolerance. The series is rated at 45 V with operating temperature range of -40 °C to 85 °C and maximum junction temperature of 150°C. The SOD-123 is a 3.7 mm x 1.6 mm x 1.2 mm surface mount package that can dissipate 230 milliwatts (mW) of power at 85°C with 500 mm /1 ounce copper on the board. The SOT-223 is a 7.0 mm x 6.5 mm x 1.6 mm surface mount package that dissipates 630 mW of power at 85°C with 500 mm /1 ounce copper on the board and is ideal for extreme thermal operating environments. The devices are qualified to AEC101. The devices are lead-free RoHS compliant and use halogen-free mold compound.

The NSI45 in SOD-123 package is priced at $0.0545 per unit in 10,000 quantities. The NSI450 in SOT-223 package is priced at $0.090 per unit in 10,000 quantities.

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