DC2788A

High Contrast applications (day to night) require high dimming ratios. The LT3950 provides up to 20,000:1 dimming ratio, providing highest dynamic range dimming for day/night vision.

Flexibility to combine with analog input dimming provides accurate LED brightness control and eliminates the need for microcontrollers.

Key Features and Benefits

●  20,000:1 external PWM (pulse-width modulation) dimming allows high dynamic range dimming of the LED load.
●  Accurate PWM control and short-circuit protection so that it can maintain constant brightness of LEDs in side-by-side strings and protects LEDs from damage.
●  SSFM Ensures Low EMI performance. Passes CISPR25 Class 5. Synchronized to PWM frequency to eliminate visible LED flicker.

Applications

●  General Purpose: Scanners, Industrial panels, Display backlighting, Video wall Displays, LED arrays
●  Automotive: High Contrast Instrument Clusters, TFT-LCD LED backlighting, HUD (Head-Up Display)
●  Aerospace and Defense: HUD, LED backlighting, high contrast instrument clusters
●  Healthcare: COVID Tester

Evaluation Board

The LT3950 can be evaluated with the DC2788A.

Block Diagrams and Tables