Overview
The LM3409HVMY/NOPB is a P-channel MOSFET (PFET) controller designed for step-down (buck) current regulators, specifically tailored for high power LED drivers. This device is part of the LM3409 family from Texas Instruments and is notable for its wide input voltage range and advanced features that make it ideal for constant current applications. The LM3409HV version extends the input voltage range up to 75 V, making it suitable for a variety of high-power LED driving scenarios.
Key Specifications
| Specification | Value |
|---|---|
| Package | HVSSOP (DGQ) with 10 pins |
| Operating Temperature Range | -40°C to 125°C |
| Input Voltage Range | 6 V to 75 V |
| MOSFET Gate Drive | 2-Ω, 1-A Peak |
| Current Sense | Differential, High-Side |
| Current Limit | Cycle-by-Cycle |
| PWM Dimming Range | 10,000:1 |
| Analog Dimming Range | 250:1 |
| Output Capacitors | Supports All-Ceramic and Capacitor-less Outputs |
| Shutdown Features | Low-Power Shutdown and Thermal Shutdown |
Key Features
- AEC-Q100 Grade 1 Qualified for automotive applications (LM3409HV-Q1)
- Wide input voltage range: 6 V to 75 V
- 2-Ω, 1-A Peak MOSFET Gate Drive
- Differential, High-Side Current Sense with low adjustable threshold voltage
- Cycle-by-Cycle Current Limit
- No Control Loop Compensation Required
- 10,000:1 PWM Dimming Range and 250:1 Analog Dimming Range
- Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
- Low-Power Shutdown and Thermal Shutdown
- Thermally Enhanced 10-Pin, HVSSOP Package
Applications
The LM3409HVMY/NOPB is primarily used as a constant current source for driving high-power LEDs, particularly in applications where forward currents up to 5 A are required. It is suitable for various LED lighting systems, including automotive lighting, industrial lighting, and consumer electronics that demand high reliability and efficiency.
Q & A
- What is the input voltage range of the LM3409HVMY/NOPB?
The input voltage range is from 6 V to 75 V. - What type of package does the LM3409HVMY/NOPB come in?
The device comes in a thermally enhanced 10-pin HVSSOP (DGQ) package. - What is the operating temperature range of the LM3409HVMY/NOPB?
The operating temperature range is from -40°C to 125°C. - Does the LM3409HVMY/NOPB require external control loop compensation?
No, it does not require external control loop compensation. - What are the dimming capabilities of the LM3409HVMY/NOPB?
The device supports a 10,000:1 PWM dimming range and a 250:1 analog dimming range. - Is the LM3409HVMY/NOPB suitable for automotive applications?
Yes, the LM3409HV-Q1 version is AEC-Q100 Grade 1 Qualified for automotive applications. - What type of current sense does the LM3409HVMY/NOPB use?
The device uses differential, high-side current sense. - Does the LM3409HVMY/NOPB support capacitor-less outputs?
Yes, it supports both all-ceramic output capacitors and capacitor-less outputs. - What are the shutdown features of the LM3409HVMY/NOPB?
The device features low-power shutdown and thermal shutdown. - What is the maximum forward current the LM3409HVMY/NOPB can handle for LED driving?
The device can handle forward currents up to 5 A.
