Overview
The LM3414HV, produced by Texas Instruments, is a high-power floating buck LED driver designed for driving high-brightness LEDs (HBLEDs). This device is notable for its wide input voltage range, high efficiency, and integrated features that simplify circuit design. The LM3414HV operates with input voltages from 4.5 VDC to 65 VDC and can deliver up to 1-A average LED current with ±3% accuracy. It incorporates a proprietary Pulse-Level-Modulation (PLM) control method, which ensures high conversion efficiency and accurate average LED current regulation.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 4.5 | - | 65 | V |
| Average LED Current | 0.95 | 1 | 1.05 | A |
| LED Current Accuracy | - | ±3% | - | - |
| Switching Frequency | 250 | 500 | 1000 | kHz |
| Minimum On-Time | 400 | - | - | ns |
| Thermal Shutdown Temperature | - | 170 | - | °C |
| Package Types | - | SOIC-8, WSON-8 | - | - |
Key Features
- Integrated low-side N-channel power MOSFET and current sensing element, eliminating the need for external current sensing resistors and bootstrapping capacitors.
- Wide input voltage range: 4.5 V to 65 V.
- Adjustable constant LED current from 350 mA to 1000 mA.
- Support for analog dimming and thermal fold-back functions.
- Constant switching frequency adjustable from 250 kHz to 1000 kHz.
- High contrast ratio with minimum dimming current pulse width < 10 µS.
- Up to 96% efficiency.
- Thermal shutdown protection.
- Available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.
Applications
- High power LED drivers.
- Architectural lighting, office troffers.
- Automotive lighting.
- MR-16 LED lamps.
Q & A
- What is the input voltage range of the LM3414HV?
The input voltage range of the LM3414HV is from 4.5 VDC to 65 VDC.
- What is the maximum average LED current the LM3414HV can deliver?
The LM3414HV can deliver up to 1-A average LED current.
- What is the accuracy of the LED current regulation in the LM3414HV?
The LED current regulation accuracy is ±3%.
- What is the switching frequency range of the LM3414HV?
The switching frequency can be adjusted from 250 kHz to 1000 kHz.
- Does the LM3414HV require external current sensing resistors?
No, the LM3414HV does not require external current sensing resistors due to its integrated current sensing element.
- What are the package options available for the LM3414HV?
The LM3414HV is available in SOIC-8 and 3 mm × 3 mm WSON-8 packages.
- What is the thermal shutdown temperature of the LM3414HV?
The thermal shutdown temperature is 170°C.
- Does the LM3414HV support analog dimming?
- What is the efficiency of the LM3414HV?
The LM3414HV can achieve up to 96% efficiency.
- What are some typical applications of the LM3414HV?
Typical applications include high power LED drivers, architectural lighting, automotive lighting, and MR-16 LED lamps.
