Overview
The NSI45090JDT4G is an adjustable 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 is capable of regulating current over a wide voltage range. The NSI45090JDT4G is robust, economical, and suitable for various applications including automotive, industrial, and commercial signage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage - Min | 45 | V |
| Low Level Output Current | 90 mA | mA |
| Maximum Operating Temperature | +150 | °C |
| Minimum Operating Temperature | -55 | °C |
| Anode-Cathode Voltage (Vak) Max | 45 | V |
| Reverse Voltage | 500 mV | mV |
| Operating and Storage Junction Temperature Range | -55 to +175 | °C |
| ESD Rating: Human Body Model | Class 3A (4000 V) | |
| ESD Rating: Machine Model | Class B (200 V) | |
| Steady State Current @ Vak = 7.5 V | 76.5 - 103.5 | mA |
| Voltage Overhead @ Vak = 7.5 V | 1.8 | V |
| Pulse Current @ Vak = 7.5 V | 86.2 - 119.6 | mA |
| Capacitance @ Vak = 7.5 V | 17 | pF |
| Capacitance @ Vak = 0 V | 70 | pF |
Key Features
- Robust Power Package: 2.7 Watts, thermally robust DPAK package.
- Adjustable Current: Adjustable up to 160 mA by attaching a resistor between Radj and Cathode pins.
- Wide Operating Voltage Range: Can handle voltages up to 45 V.
- Immediate Turn-On: Turns on immediately and reaches 20% of regulation with only 0.5 V across it.
- Voltage Surge Suppressing: Protects LEDs from thermal runaway and voltage surges.
- UL94-V0 Certified: Compliant with UL94-V0 standards for flammability.
- SBT Technology: Based on 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 without additional components.
- AEC-Q101 Qualified and RoHS Compliant: Qualified to stringent automotive standards and lead-free, halogen-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: Suitable for applications requiring switch contact wetting.
- Industrial and Commercial Signage: High anode-cathode voltage rating withstands surges common in these applications.
Q & A
- What is the maximum input voltage the NSI45090JDT4G can handle?
The NSI45090JDT4G can handle a maximum input voltage of 45 V.
- What is the typical steady-state current of the NSI45090JDT4G at 7.5 V?
The typical steady-state current is 90 mA at 7.5 V.
- How can the output current be adjusted?
The output current can be adjusted by attaching a resistor between the Radj and Cathode pins.
- What is the operating temperature range of the NSI45090JDT4G?
The operating temperature range is from -55°C to +150°C.
- Is the NSI45090JDT4G RoHS compliant?
Yes, the NSI45090JDT4G is lead-free, halogen-free, and RoHS compliant.
- What is the maximum power dissipation of the NSI45090JDT4G?
The maximum power dissipation depends on the board design and layout, but it can handle up to 2.7 Watts.
- Can the NSI45090JDT4G 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.
- What is the ESD rating of the NSI45090JDT4G?
The ESD rating is Class 3A (4000 V) for the Human Body Model and Class B (200 V) for the Machine Model.
- How does the NSI45090JDT4G 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.
- What certifications does the NSI45090JDT4G hold?
The NSI45090JDT4G is UL94-V0 certified and AEC-Q101 qualified.
