Overview
The LM3406HVMHX/NOPB is a monolithic switching regulator designed by Texas Instruments to deliver constant currents to high power LEDs. This device is part of the LM3406HV family, which is ideal for automotive, industrial, and general lighting applications. It features a high-side N-channel MOSFET switch with a current limit of 2.0A (typical) for step-down (Buck) regulators. The LM3406HV series is known for its ability to adjust the output voltage to deliver a constant current to series and series-parallel connected LED arrays of varying number and type.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 14-TSSOP (0.173", 4.40mm Width) Exposed Pad |
| Pins | 14 |
| Operating Temperature Range (°C) | -40 to 125 |
| Input Voltage Range | 6V to 75V |
| Output Current | 1.5A |
| Switching Frequency | 10kHz ~ 1MHz |
| Dimming Method | PWM (Pulse Width Modulation) |
| Minimum Output Current Limit Over Temperature | 1.7A |
| Topology | Step-Down (Buck) |
| Internal Switch | Yes (2.0A MOSFET) |
| Number of Outputs | 1 |
| RoHS Compliance | Yes |
Key Features
- Automotive Grade Device, AEC-Q100 Grade 1 Qualified (for LM3406HV-Q1)
- Operating Ambient Temperature: –40°C to 125°C
- Integrated 2.0A MOSFET
- True Average Output Current Control
- Cycle-by-Cycle Current Limit
- PWM Dimming with Dedicated Logic Input and Power Input Voltage
- Simple Control Loop Compensation
- Low Power Shutdown
- Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
- Thermal Shutdown Protection
Applications
The LM3406HVMHX/NOPB is suitable for various applications, including:
- Automotive Lighting Systems
- Industrial Lighting
- General Lighting Applications
- LED Driver Systems
- Constant Current Sources
Q & A
- What is the primary function of the LM3406HVMHX/NOPB?
The LM3406HVMHX/NOPB is a constant current buck LED driver designed to deliver constant currents to high power LEDs.
- What is the input voltage range for the LM3406HVMHX/NOPB?
The input voltage range is from 6V to 75V.
- What is the maximum output current of the LM3406HVMHX/NOPB?
The maximum output current is 1.5A.
- What dimming methods are supported by the LM3406HVMHX/NOPB?
The device supports PWM (Pulse Width Modulation) dimming using a dedicated logic pin or by PWM of the power input voltage.
- Is the LM3406HVMHX/NOPB RoHS compliant?
Yes, the LM3406HVMHX/NOPB is RoHS compliant.
- What is the operating temperature range of the LM3406HVMHX/NOPB?
The operating temperature range is from -40°C to 125°C.
- Does the LM3406HVMHX/NOPB have thermal shutdown protection?
Yes, it has thermal shutdown protection.
- What package type does the LM3406HVMHX/NOPB come in?
The device comes in a 14-TSSOP (0.173", 4.40mm Width) Exposed Pad package.
- Is the LM3406HVMHX/NOPB suitable for automotive applications?
Yes, it is an automotive grade device and is AEC-Q100 Grade 1 Qualified (for LM3406HV-Q1).
- Can the LM3406HVMHX/NOPB support all-ceramic output capacitors and capacitor-less outputs?
Yes, it supports all-ceramic output capacitors and capacitor-less outputs.
