Overview
The NSI45030T1G is a constant current regulator (CCR) and LED driver 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 NSI45030T1G is known for its immediate turn-on, robust power package, and ability to protect LEDs from thermal runaway at extreme voltages and currents.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Steady State Current @ Vak = 7.5 V | Ireg(SS) | 25.5 | 30 | 34.5 | mA |
| Voltage Overhead | Voverhead | 1.8 | V | ||
| Pulse Current @ Vak = 7.5 V | Ireg(P) | 30.3 | 36.4 | 42.5 | mA |
| Capacitance @ Vak = 7.5 V | C | 2.5 | pF | ||
| Anode-Cathode Voltage | Vak | 45 | V | ||
| 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, making it suitable for high-power applications.
- Wide Operating Voltage Range: The device can handle voltages up to 45 V.
- Immediate Turn-On: The CCR turns on immediately and is at 25% 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.
- SBT (Self-Biased Transistor) Technology: Ensures stable current regulation.
- Negative Temperature Coefficient: Reduces current as temperature rises, protecting LEDs from thermal runaway.
- AEC-Q101 Qualified and PPAP Capable: Suitable for automotive and other applications requiring unique site and control change requirements.
- Pb-Free, Halogen Free/BFR Free, and RoHS Compliant: Environmentally friendly and compliant with regulatory standards.
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: Ensures reliable switch operation.
- LED Strings: Can be used in series with LEDs as a high side or low side driver.
- AC Applications: Can be used with full wave rectified AC, as shown in application notes AND8433/D and AND8492/D.
Q & A
- What is the primary function of the NSI45030T1G?
The NSI45030T1G is a constant current regulator (CCR) designed to regulate current in LEDs.
- What is the maximum anode-cathode voltage the NSI45030T1G can handle?
The device can handle up to 45 V.
- What is the typical steady state current of the NSI45030T1G at 7.5 V?
The typical steady state current is 30 mA.
- Does the NSI45030T1G require external components for operation?
No, the NSI45030T1G does not require any external components for operation.
- What is the operating temperature range of the NSI45030T1G?
The operating and storage junction temperature range is −55°C to +150°C.
- Is the NSI45030T1G suitable for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications.
- How does the NSI45030T1G protect LEDs from thermal runaway?
The device has a negative temperature coefficient, which reduces the current as temperature rises, protecting LEDs from thermal runaway.
- Can the NSI45030T1G 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.
- What is the thermal resistance, junction-to-ambient, of the NSI45030T1G?
The thermal resistance, junction-to-ambient, is typically 600 °C/W.
- Is the NSI45030T1G environmentally friendly?
Yes, it is Pb-Free, Halogen Free/BFR Free, and RoHS Compliant.
