The LT
The LT3955 is a DC/DC converter designed to operate as a constant-current source and constant-voltage regulator. It features an internal low side N-channel MOSFET rated for 80V/3.5A and is ideally suited for driving high current LEDs, as well as charging batteries and supercapacitors.
The device utilizes a fixed frequency, current mode architecture for stable operation over a wide range of supply and output voltages. Key features include 3000:1 True Color PWM dimming, programmable switching frequency from 100kHz to 1MHz, and support for various configurations such as Boost, SEPIC, CUK, Buck, Buck-Boost, and Flyback.
| Internal Switch Rating | 80V/3.5A |
|---|---|
| Input Voltage Range | 4.5V to 60V |
| Switching Frequency Range | 100kHz to 1MHz |
| PWM Dimming Ratio | 3000:1 |
| Operating Ambient Temperature Range | -40°C to 125°C |
| Package Type | 36-Lead (5mm x 6mm) Plastic QFN |
It is designed to operate as a constant-current source and constant-voltage regulator, ideally suited for driving high current LEDs.
Yes, it drives LEDs in Boost, SEPIC, CUK, Buck Mode, Buck-Boost Mode, or Flyback Configuration.
Yes, it has features to make it suitable for charging batteries and supercapacitors.