EVAL-LT8355-1-AZ

EVAL-LT8355-1-AZ evaluation board is a high voltage dual LED controller featuring the LT8355-1. Channel 1 is assembled as a boost LED driver and channel 2 as a buck-boost mode LED driver. Either channel can be altered to a boost LED driver or buck-boost mode LED driver by adjusting the FB network and LED connection. EVAL-LT8355-1-AZ drives a single string of LEDs per channel when the input is between 8V and 18V. Channel 1 drives up to 72V of LEDs at 450mA and channel 2 drives up to 30V of LEDs at 1A. EVAL-LT8355-1-AZ has an UVLO set at 6.2V falling and 7.5V rising. EVAL-LT8355-1-AZ features PWM dimming, analogue dimming, shutdown, open LED and short LED fault protection and reporting. EVAL-LT8355-1-AZ runs at 250KHz switching frequency and features spread spectrum frequency modulation (SSFM) modulating its switching frequency from 250KHz to 310KHz to reduce EMI emissions.

• mall ceramic input and output capacitors are used to save space and cost
• High voltage 100V external power switch and 100V catch diode are used on each channel
• Input and output filters on EVAL-LT8355-1-AZ help further reduce its EMI
• LT8355-1’s integrated PWMTG high-side PMOS drivers assist with PWM dimming of the connected LEDs

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party