Overview
The NSI50010YT1G is a linear constant current regulator (CCR) produced by onsemi. This device is designed to provide a cost-effective solution for regulating current in LEDs, similar to a Constant Current Diode (CCD). It is based on Self-Biased Transistor (SBT) technology and regulates current over a wide voltage range. The CCR is known for its simplicity, economical design, and robust performance, making it suitable for various applications including automotive, industrial, and commercial signage.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Anode-Cathode Voltage | Vak | - | - | 50 | V |
| Steady State Current @ Vak = 7.5 V | Ireg(SS) | 7.0 | 10 | 13 | mA |
| Voltage Overhead | Voverhead | - | 1.8 | - | V |
| Pulse Current @ Vak = 7.5 V | Ireg(P) | 7.1 | 10.5 | 13.8 | mA |
| Capacitance @ Vak = 7.5 V | C | - | 2.5 | - | pF |
| Capacitance @ Vak = 0 V | C | - | 5.7 | - | pF |
| Operating and Storage Junction Temperature Range | TJ, Tstg | -55 | - | 150 | °C |
| Thermal Resistance, Junction-to-Ambient | RθJA | - | - | 600 | °C/W |
Key Features
- Robust Power Package: The device is packaged in a thermally robust SOD-123 package, capable of handling up to 460 mW of power.
- Wide Operating Voltage Range: The CCR can operate over a wide voltage range, with an anode-cathode voltage rating of up to 50 V.
- Immediate Turn-On: The device turns on immediately and is typically at 20% of regulation with only 0.5 V across it.
- Voltage Surge Suppressing: Protects LEDs from voltage surges common in automotive, industrial, and commercial signage applications.
- UL94-V0 Certified: Meets UL94-V0 certification standards for flammability.
- SBT (Self-Biased Transistor) Technology: Utilizes SBT technology for current regulation.
- Negative Temperature Coefficient: Reduces current as temperature rises, protecting LEDs from thermal runaway.
- AEC-Q101 Qualified and PPAP Capable: Qualified to AEC-Q101 standards and capable of Production Part Approval Process (PPAP).
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant: Environmentally friendly and compliant with RoHS regulations.
Applications
- Automotive: Chevron side mirror markers, cluster, display & instrument backlighting, CHMSL, map light.
- AC Lighting Panels: Display signage, decorative lighting, channel lettering.
- Switch Contact Wetting: Used in applications requiring switch contact wetting.
- LED Strings: Can be used in series with LEDs as a high-side or low-side driver, and multiple CCRs can be connected in parallel for higher current requirements.
- Dimming using PWM: Supports dimming of LED strings using Pulse Width Modulation (PWM).
- AC Applications: Can be used with full wave rectified AC in various configurations as described in application notes.
Q & A
- What is the primary function of the NSI50010YT1G?
The NSI50010YT1G is a linear constant current regulator (CCR) designed to regulate current in LEDs.
- What is the maximum anode-cathode voltage rating for the NSI50010YT1G?
The maximum anode-cathode voltage rating is 50 V.
- What is the typical steady-state current at 7.5 V?
The typical steady-state current at 7.5 V is 10 mA.
- What is the thermal resistance, junction-to-ambient for the NSI50010YT1G?
The thermal resistance, junction-to-ambient is up to 600 °C/W depending on the board configuration.
- Is the NSI50010YT1G UL94-V0 certified?
- What technology does the NSI50010YT1G use for current regulation?
The NSI50010YT1G uses Self-Biased Transistor (SBT) technology.
- How does the NSI50010YT1G protect LEDs from thermal runaway?
The device has a negative temperature coefficient, which reduces the current as the temperature rises, protecting LEDs from thermal runaway.
- Is the NSI50010YT1G qualified to automotive standards?
- Can the NSI50010YT1G be used in AC applications?
- How can the NSI50010YT1G be used for dimming LED strings?
The dimming of LED strings can be achieved using Pulse Width Modulation (PWM) by placing a BJT in series with the CCR.
