LM3509SDE Texas Instruments In Stock
LM3509SDE is a high-efficiency white LED driver and boost converter by Texas Instruments, featuring up to 28V output, 1.2MHz switching frequency, and 8-channel LED current matching. Key specs: 2.7V–5.5V input voltage, 40mA per channel, I2C-compatible dimming control. From competitive pricing, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- —
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Price
- From $1.7441(MOQ 107)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LM3509SDE?
- High-efficiency boost converter with up to 28V output voltage for multi-LED backlight strings
- 8-channel matched current output with ±1.5% current accuracy for uniform brightness
- 1.2MHz fixed switching frequency minimizes external component size
- Wide input voltage range: 2.7V to 5.5V, suitable for single-cell Li-Ion battery systems
- Integrated I2C-compatible interface for digital brightness dimming control
- Thermal shutdown and overvoltage protection for robust system reliability
What is LM3509SDE used for?
LM3509SDE is widely used in mobile phone and tablet LCD backlight systems where compact size and high efficiency are critical. It is also applied in portable media players, digital cameras, and handheld gaming devices that require uniform LED brightness with low-power operation. The device suits any battery-powered consumer electronics design demanding precise multi-channel LED current control and flexible dimming.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for LM3509SDE?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input voltage range of the LM3509SDE?
The LM3509SDE operates over an input voltage range of 2.7V to 5.5V, making it ideal for single-cell Li-Ion and Li-polymer battery-powered applications such as smartphones and tablets.
How many LED channels does the LM3509SDE support?
The LM3509SDE supports 8 matched current output channels, each capable of delivering up to 40mA, with ±1.5% current matching accuracy to ensure uniform LED backlight brightness across the display.
What dimming control method does the LM3509SDE use?
The LM3509SDE supports I2C-compatible digital brightness dimming control, allowing the host processor to precisely adjust LED current levels for power saving and smooth brightness transitions in display backlight applications.
What package is the LM3509SDE available in?
The LM3509SDE is available in a small DEN package (WSON), which is optimized for space-constrained mobile and portable electronics designs requiring a minimal PCB footprint.
What are common applications for the LM3509SDE?
The LM3509SDE is commonly used in LCD backlight drivers for mobile phones, tablets, portable media players, digital cameras, and handheld gaming consoles, where compact high-efficiency LED driving with uniform current matching is required.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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