Overview
The NSI45035JZT1G, produced by onsemi, is an adjustable constant current regulator (CCR) and LED driver designed to provide a cost-effective solution for regulating current in LEDs. This device is based on Self-Biased Transistor (SBT) technology and is known for its simplicity, economy, and robustness. It is suitable for a wide range of applications, including automotive, industrial, and commercial signage, due to its high anode-cathode voltage rating and ability to withstand voltage surges.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Anode-Cathode Voltage | Vak | 45 | V | ||
| Reverse Voltage | VR | 500 mV | |||
| Operating and Storage Junction Temperature Range | TJ, Tstg | -55 | 150 | °C | |
| Steady State Current @ Vak = 7.5 V | Ireg(SS) | 29.75 | 35 | 40.25 | mA |
| Voltage Overhead | Voverhead | 1.8 | V | ||
| Pulse Current @ Vak = 7.5 V | Ireg(P) | 30.9 | 42.5 | mA | |
| Capacitance @ Vak = 7.5 V | C | 7.4 | pF | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 124 | °C/W |
Key Features
- Robust Power Package: 1.5 Watts
- Adjustable up to 70 mA
- Wide Operating Voltage Range
- Immediate Turn-On: Typically at 20% of regulation with only 0.5 V across it
- Voltage Surge Suppressing: Protects LEDs from thermal runaway and voltage surges
- AEC-Q101 Qualified and PPAP Capable
- UL94-V0 Certified
- SBT (Self-Biased Transistor) Technology
- Negative Temperature Coefficient: Reduces current as temperature rises to protect LEDs
- No External Components Required: Can be designed as a high or low-side regulator
- Pb-Free, Halogen-Free/BFR-Free, and RoHS Compliant
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
- High or Low Side LED Driver in various lighting applications
Q & A
- What is the NSI45035JZT1G used for?
The NSI45035JZT1G is used as an adjustable constant current regulator (CCR) and LED driver to regulate current in LEDs. - What is the maximum anode-cathode voltage rating of the NSI45035JZT1G?
The maximum anode-cathode voltage rating is 45 V. - What is the typical steady state current of the NSI45035JZT1G at Vak = 7.5 V?
The typical steady state current is 35 mA. - Does the NSI45035JZT1G require external components?
No, it does not require external components and can be designed as a high or low-side regulator. - What is the thermal resistance, junction-to-ambient, of the NSI45035JZT1G?
The thermal resistance, junction-to-ambient, is typically 124 °C/W. - Is the NSI45035JZT1G qualified for automotive applications?
Yes, it is AEC-Q101 qualified and PPAP capable. - How can the current be adjusted in the NSI45035JZT1G?
The current can be adjusted by attaching a resistor between the Radj pin and the cathode. - What is the purpose of the negative temperature coefficient in the NSI45035JZT1G?
The negative temperature coefficient reduces the current as the temperature rises, protecting the LEDs from thermal runaway. - Can the NSI45035JZT1G be used in AC applications?
Yes, it can be used with full wave rectified AC as described in application notes AND8433/D and AND8492/D. - How is dimming achieved with the NSI45035JZT1G?
Dimming can be achieved using Pulse Width Modulation (PWM) by placing a BJT in series with the CCR.
