ON Semiconductor expanded its lineup of constant current regulators (CCR) with the NSI50350A. Designed for automotive, architectural lighting and signage, this simple yet rugged device offers high thermal efficiency and cost-effective options for passive/discrete components or driver integrated circuit (IC) solutions for LED current regulation. A variety of 1 watt lighting applications.
The NSI50350A CCR incorporates self-biasing transistor (SBT) technology to stabilize current over a wide voltage range. Designed with built-in LED drivers, it provides a negative temperature coefficient (NTC) feature that protects the LED from thermal runaway under extreme voltage and current conditions. The 350mA ±10% steady-state steady current (Ireg) is ideal for driving 1.0W LEDs.
Because the NSI50350A does not require external components, it can be designed as a high-side or low-side current regulator. The high rated anode-to-cathode voltage (Vak) of 50 volts (V) allows the device to withstand voltage surges common in automotive, industrial and commercial signage applications. When only 0.5 V of Vak is applied, the device turns on immediately, reaching 20% ​​of the full current.
The NSI50350A is available in DPAK-4 (NSI50350AD) or SMC (NSI50350AS) industry-standard packages that dissipate 11 W and 5.8 W, respectively.
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