Semtech SC441
High Efficiency Integrated Boost LED Driver for 4-Strings of 150mA LEDs
Not Recommended For New Designs, see SC441A (AEC-Q100 qualified) or SC441C (high voltage input)
The SC441 is a high-efficiency multiple string white LED driver with an integrated boost converter. It operates over a wide input range from 4.5V to 21V with a maximum output voltage of 36V and a 2.5A internal power switch. It can drive up to forty WLEDs in 4 strings with current up to 150mA per string.
Features
- Wide input voltage range from 4.5V to 21V
- 36V maximum output voltage
- Drives up to 40 WLEDs in 4 strings
- Programmable LED current for up to 150mA per string
- +/- 2% string-to-string current matching
- Up to 90% efficiency
- Wide 0.2% to 100% PWM dimming range
- Possible analog dimming
- Integrated 2.5A power switch
- 800kHz switching frequency for small size
- Adjustable OVP for cost-effective output cap selection
- Open/short LED protection
- Thermal protection with auto-recovery
- Thermally enhanced TSSOP-20 EDP package
- Fully WEEE and RoHS compliant
Applications
- Medium-sized LCD pane
- Notebook Display
- Automotive Car Navigation Display
- Sub-Notebook and Tablet Computer Displays
- Portable Media Players
Order Codes
- SC441TETRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
Order Evaluation Boards
Semtech provides evaluation boards to help design engineers quickly and easily evaluate the performance of our devices for their application requirements.
To order, use our Evaluation Board Request Form below. One (1) free evaluation board may be requested per order form.
Eval boards are readily available for most of our new and popular products. If you wish to request boards for other parts, simply type the part number in the “Select Part Number” field space of the order form. These will be subject to availability.
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