Overview
The LM3404MAX/NOPB is a 42-V, 1.0-A constant current buck LED driver produced by Texas Instruments. This monolithic switching regulator is designed to deliver constant currents to high power LEDs, making it ideal for various lighting applications. The device features an integrated 1-A MOSFET and operates in a hysteretic controlled on-time mode, eliminating the need for small-signal control loop compensation. It supports PWM dimming, low-power shutdown, and thermal shutdown protection, among other key features.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 6 | - | 42 | V |
| Output Current | - | 1.0 | 1.2 | A |
| Junction Temperature Range | -40 | - | 125 | °C |
| MOSFET On-Resistance (RDS-ON) | 0.37 | 0.75 | - | Ω |
| Thermal Shutdown Threshold | - | 165 | - | °C |
| Package Type | - | - | SOIC-8, SO PowerPAD-8 | - |
Key Features
- Integrated 1-A MOSFET switch with a current limit of 1.5-A (typical)
- Wide input voltage range: 6 V to 42 V (LM3404), 6 V to 75 V (LM3404HV)
- No control loop compensation required due to hysteretic controlled on-time architecture
- PWM dimming and low-power shutdown capabilities
- Thermal shutdown protection
- Supports all-ceramic output capacitors and capacitor-less outputs
- Broken or open LED protection
- Fast transient response and simple output overvoltage protection
Applications
- LED Drivers
- Constant Current Sources
- Automotive Lighting
- General Illumination
- Industrial Lighting
Q & A
- What is the input voltage range of the LM3404MAX/NOPB?
The input voltage range is 6 V to 42 V for the LM3404 and 6 V to 75 V for the LM3404HV.
- What is the maximum output current of the LM3404MAX/NOPB?
The maximum output current is 1.2 A.
- Does the LM3404MAX/NOPB require control loop compensation?
No, it does not require control loop compensation due to its hysteretic controlled on-time architecture.
- What types of dimming does the LM3404MAX/NOPB support?
The device supports PWM dimming.
- What is the thermal shutdown threshold of the LM3404MAX/NOPB?
The thermal shutdown threshold is 165°C.
- What are the package options for the LM3404MAX/NOPB?
The device is available in SOIC-8 and SO PowerPAD-8 packages.
- Does the LM3404MAX/NOPB have built-in protection features?
- Can the LM3404MAX/NOPB be used in automotive applications?
- What is the typical on-resistance of the MOSFET in the LM3404MAX/NOPB?
The typical on-resistance is 0.75 Ω.
- Does the LM3404MAX/NOPB support all-ceramic output capacitors?
