Overview
The LM3407MY/NOPB is a constant current output floating buck switching converter designed by Texas Instruments. This device is specifically tailored to provide a constant current to high-power LEDs, making it ideal for various lighting applications. It features an integrated power N-channel MOSFET, which simplifies the application solution and enhances compactness. The LM3407MY/NOPB operates with a wide input voltage range of 4.5V to 30V and can deliver up to 350mA of output current. It also includes Pulse Width Modulation (PWM) dimming control and an independent enable pin for low-power shutdown, ensuring high flexibility and efficiency in LED lighting systems.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad |
| Input Voltage Range | 4.5V to 30V |
| Output Current | Up to 350mA |
| Switching Frequency | 300 kHz to 1 MHz |
| Dimming Control | Pulse Width Modulation (PWM) |
| Operating Temperature | -40°C to 125°C (TJ) |
| Mounting Type | Surface Mount |
| Topology | Step-Down (Buck) |
| Internal Switch(es) | Yes |
| Number of Outputs | 1 |
Key Features
- Accurate constant current output with 10% accuracy
- Independent device enable (CMOS compatible) and PWM dimming control
- Converter switching frequency adjustable from 300 kHz to 1 MHz
- No external control loop compensation required
- Supports ceramic and low ESR output capacitors
- Input undervoltage lockout (UVLO) and thermal shutdown protection
- Pulse Level Modulation (PLM) for precise constant current control
- Exposed pad MSOP-8 package for excellent heat dissipation and thermal performance
Applications
- LED Drivers
- Constant Current Sources
- Automotive Lighting
- General Illumination
- Industrial Lighting
Q & A
- What is the primary function of the LM3407MY/NOPB?
The LM3407MY/NOPB is a constant current output floating buck switching converter designed to provide a constant current to high-power LEDs.
- What is the input voltage range of the LM3407MY/NOPB?
The input voltage range is from 4.5V to 30V.
- What is the maximum output current of the LM3407MY/NOPB?
The maximum output current is up to 350mA.
- What dimming control method does the LM3407MY/NOPB support?
The LM3407MY/NOPB supports Pulse Width Modulation (PWM) dimming control.
- What is the switching frequency range of the LM3407MY/NOPB?
The switching frequency is adjustable from 300 kHz to 1 MHz.
- Does the LM3407MY/NOPB require external control loop compensation?
No, the LM3407MY/NOPB does not require external control loop compensation.
- What type of capacitors does the LM3407MY/NOPB support?
The LM3407MY/NOPB supports ceramic and low ESR output capacitors.
- What protection features does the LM3407MY/NOPB have?
The LM3407MY/NOPB has input undervoltage lockout (UVLO) and thermal shutdown protection.
- What is the operating temperature range of the LM3407MY/NOPB?
The operating temperature range is from -40°C to 125°C (TJ).
- What package types are available for the LM3407MY/NOPB?
The LM3407MY/NOPB is available in 8-TSSOP and 8-MSOP packages with an exposed pad.
