The LT
The LT3795 is a DC/DC controller designed to regulate a constant-current or constant-voltage output, making it ideal for driving LEDs. It drives a low-side external N-channel power MOSFET from an internal regulated 7.7V supply. The device features a fixed frequency and current mode architecture for stable operation over a wide range of supply and output voltages.
Key features include Spread Spectrum Frequency Modulation (SSFM) for improved electromagnetic compatibility (EMC) performance, 3000:1 True Color PWM dimming, and a wide input voltage range from 4.5V to 110V. The controller also provides input and output current reporting, programmable input current limits, and various protection features such as short-circuit protection and open LED detection.
| Input Voltage Range | 4.5V to 110V |
|---|---|
| PWM Dimming Ratio | 3000:1 |
| Internal Regulated Supply | 7.7V |
| Package Type | 28-Lead Plastic TSSOP |
| Switching Frequency Range | 100kHz to 1MHz |
It is designed to regulate a constant-current or constant-voltage output and is ideal for driving LEDs.
Yes, it can activate spread spectrum frequency modulation (SSFM) for improved electromagnetic compatibility (EMC) performance.
The maximum output current is set by an external resistor.