Overview
The NSV45020AT1G is a linear constant current regulator (CCR) manufactured by ON Semiconductor. This device is designed to provide a cost-effective solution for regulating current in LEDs and other applications. It is based on Self-Biased Transistor (SBT) technology, which allows it to regulate current over a wide voltage range. The CCR is known for its robustness, immediate turn-on, and ability to protect LEDs from thermal runaway and voltage surges. It is suitable for various applications, including automotive, industrial, and commercial signage lighting.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Anode-Cathode Voltage | Vak | 45 | V | ||
| Steady State Current @ Vak = 7.5 V | Ireg(SS) | 18 | 20 | 22 | mA |
| Voltage Overhead | Voverhead | 1.8 | V | ||
| Pulse Current @ Vak = 7.5 V | Ireg(P) | 19.85 | 22.5 | 25.15 | 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: 460 mW power dissipation capability.
- Wide Operating Voltage Range: Can handle voltages up to 45 V.
- Immediate Turn-On: Turns on immediately and reaches 25% of regulation with only 0.5 V across it.
- Voltage Surge Suppressing: Protects LEDs from voltage surges.
- UL94-V0 Certified: Meets UL94-V0 flammability standards.
- SBT (Self-Biased Transistor) Technology: Ensures stable current regulation.
- Negative Temperature Coefficient: Reduces current as temperature rises to protect LEDs.
- AEC-Q101 Qualified and PPAP Capable: Suitable for automotive and other demanding applications.
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant: Environmentally friendly.
Applications
- Automotive Lighting: Chevron side mirror markers, cluster, display & instrument backlighting, CHMSL, map light.
- AC Lighting Panels and Signage: Display signage, decorative lighting, channel lettering.
- Switch Contact Wetting: Ensures reliable switch operation.
- LED Strings: Can be used in series with LEDs as high or low side drivers.
- Dimming using PWM: Supports Pulse Width Modulation for dimming LED strings.
- AC Applications: Can be used with full wave rectified AC in various lighting applications.
Q & A
- What is the maximum anode-cathode voltage the NSV45020AT1G can handle?
The NSV45020AT1G can handle a maximum anode-cathode voltage of 45 V.
- What is the typical steady state current of the NSV45020AT1G at 7.5 V?
The typical steady state current is 20 mA at 7.5 V.
- What is the thermal resistance, junction-to-ambient, of the NSV45020AT1G?
The thermal resistance, junction-to-ambient, is 600 °C/W.
- Is the NSV45020AT1G suitable for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable, making it suitable for automotive and other demanding applications.
- How does the NSV45020AT1G protect LEDs from thermal runaway?
The device has a negative temperature coefficient, which reduces the current as the temperature rises, protecting the LEDs from thermal runaway.
- Can the NSV45020AT1G be used in AC applications?
Yes, it can be used with full wave rectified AC as shown in application notes AND8433/D and AND8492/D.
- How is dimming achieved using the NSV45020AT1G?
Dimming can be achieved by using Pulse Width Modulation (PWM) by placing a BJT in series with the CCR.
- What is the operating and storage junction temperature range of the NSV45020AT1G?
The operating and storage junction temperature range is -55°C to 150°C.
- Is the NSV45020AT1G environmentally friendly?
Yes, it is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant.
- What is the power dissipation capability of the NSV45020AT1G?
The device has a power dissipation capability of 460 mW.
