LT3952 - 60V LED Driver with 4A Switch Current
- 4000:1 True Color PWM™ Dimming
- 4A, 60V Internal DMOS Switch
- Wide Input Voltage Range: 3V to 42V
- 0V to 60V Output Current Regulation with Monitor
- PMOS Switch Driver for PWM and Output Disconnect
- LED Short-Circuit Protection and SHORTLED Flag
- Internal Spread Spectrum Frequency Modulation
- Constant-Current and Constant-Voltage Regulation
- Input Current Limit and Monitor
- Adjustable Frequency: 200kHz to 3MHz, Synchronizable to an External Clock
- 10:1 Analog Dimming
- Programmable Open-LED Protection with OPENLED Flag
- Programmable VIN Undervoltage and Overvoltage Lockout
- Available in a 28-Lead TSSOP Package
The LT®3952 is a current mode step-up DC/DC converter with an internal, 60V, 80mΩ DMOS power switch. The LT3952 is specifically designed to drive high power LEDs in multiple configurations. It combines input and output current regulation loops with output voltage regulation to operate as a flexible current/voltage source.
Programmable switching frequency with optional spreadspectrum modulation provides EMI reduction, while still allowing optimization of the external components for efficiency or component size. The LED current is programmable with an external sense resistor, and can be adjusted from zero to full scale with a voltage at the CTRL pin. The external PWM input provides LED ON/OFF control and 4000:1 dimming ratio, and an internal PWM generator delivers the efficiency of PWM dimming to standalone or I/O limited applications. The LT3952 is available in the thermally enhanced 28-lead TSSOP package.
CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.
For complete and up to date package information and drawings, please refer to our packaging page
- Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
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Demo BoardsLinear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.
|DC2013A||LT3952EFE Demo Board | CC/CV Boost LED Driver, 5V ≤ VIN ≤ 36V, VLED = VIN up to 50V @ 330mA||$150.00|
|DC2361A||LT3952EFE Demo Board | 2MHz LED Driver, 8V ≤ VIN ≤ 28V, IOUT = 330mA at 40V||$150.00|
- Display Backlighting
- Automotive and Avionic Lighting
- Accurate Current-Limited Voltage Regulators
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