Overview
The LM3410XMF is a high-accuracy, constant current boost and SEPIC LED driver from Texas Instruments (though it was initially developed by National Semiconductor before the acquisition). This monolithic, high-frequency PWM DC-DC converter is designed to provide precise current regulation for LED applications. It is available in a compact 5-pin SOT-23 package, making it ideal for space-constrained designs. The device operates with an input voltage range of 2.7V to 5.5V and can deliver an output voltage up to 24V, with a maximum output current of 2.8A. The LM3410XMF features internal compensation and requires minimal external components, simplifying system integration and reducing board space requirements.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.7 | - | 5.5 | V |
| Output Voltage (VO) | - | - | 24 | V |
| Switch Current Limit (ICL) | 2.1 | 2.8 | - | A |
| Switching Frequency (fSW) | 1200 | 1600 | 2000 | kHz |
| Switch On Resistance (RDS(ON)) | 170 | - | 330 | mΩ |
| Feedback Voltage (VFB) | 178 | 190 | 202 | mV |
| Quiescent Current (IQ) | 3.4 | 7 | - | mA |
| Thermal Shutdown Temperature (TSD) | - | - | 165 | °C |
Key Features
- Precise Current Regulation: Ensures accurate current control for reliable and efficient operation.
- High Switching Frequency: Operates at either 525 kHz or 1.6 MHz, allowing the use of small surface mount inductors and capacitors.
- High Efficiency: Achieves efficiencies up to 88% despite high operating frequencies.
- Current-Mode Control: Regulates the LED current using current-mode control and internal compensation.
- PWM Dimming: Supports PWM dimming with duty cycles from 0 to 100% and frequencies from 1 Hz to 25 kHz.
- Thermal Management: Includes thermal shutdown to prevent overheating.
- Compact Package: Available in 5-pin SOT-23, 6-pin WSON, and 8-pin MSOP-PowerPad packages.
- Low Standby Current: Features an ultra-low standby current of 80 nA.
- Fault-Tolerant Design: Includes cycle-by-cycle current limiting and undervoltage lockout for robust operation.
Applications
- LED Backlight Current Sources: Suitable for backlighting in LCD displays and OLED screens.
- LiIon Backlight OLED and HB LED Drivers: Used in handheld devices and other battery-powered applications.
- LED Flash Drivers: Ideal for camera flash and other high-current LED applications.
- Automotive Applications: Used in automotive lighting systems due to its robustness and reliability.
- Industrial Automation and Lighting Control Systems: Essential for precise current regulation in industrial and commercial lighting.
- Electronic Signage and Displays: Utilized for efficient power management and EMI filtering in display systems.
- Renewable Energy Systems: Used in conjunction with solar panels or wind turbines for efficient power conversion.
Q & A
- What is the input voltage range of the LM3410XMF?
The input voltage range is from 2.7V to 5.5V.
- What is the maximum output voltage of the LM3410XMF?
The maximum output voltage is up to 24V.
- What is the maximum switch current limit of the LM3410XMF?
The maximum switch current limit is 2.8A (typical).
- What are the available switching frequencies for the LM3410XMF?
The switching frequencies are either 525 kHz or 1.6 MHz.
- How does the LM3410XMF regulate the LED current?
The device uses current-mode control and internal compensation to regulate the LED current.
- What is the efficiency of the LM3410XMF?
The efficiency can be up to 88% despite high operating frequencies.
- Does the LM3410XMF support PWM dimming?
Yes, it supports PWM dimming with duty cycles from 0 to 100% and frequencies from 1 Hz to 25 kHz.
- What is the thermal shutdown temperature of the LM3410XMF?
The thermal shutdown temperature is 165°C.
- What is the standby current of the LM3410XMF when in shutdown mode?
The standby current is 80 nA.
- In what packages is the LM3410XMF available?
The LM3410XMF is available in 5-pin SOT-23, 6-pin WSON, and 8-pin MSOP-PowerPad packages.
