EVAL-LT8376-AZ

EVAL-LT8376-AZ evaluation board is a 60V, 2A synchronous buck LED driver featuring the LT8376. The board drives a single string of LEDs up to 36V at 1.5A when VIN is between 43V and 57V. EVAL-LT8376-AZ has an undervoltage lockout (UVLO) set at 40V with 2V hysteresis for turn-on. EVAL-LT8376-AZ runs at 350KHz switching frequency and features optional spread spectrum modulation (SSFM). With SSFM enabled, LT8376 modulates its switching frequency from fSW to fSW + 25% to reduce EMI emissions. The LT8376 has an input voltage range of 3.6V to 60V. LT8376 has internal, synchronous 60V switches for high efficiency and small size. LT8376 has an adjustable switching frequency between 200KHz and 2MHz. The LT8376 can be synchronized with an external clock source or configured with SSFM enabled for low EMI. EVAL-LT8376-AZ includes a SYNC/SSFM jumper to configure the LT8376 for either external frequency synchronization, SSFM enabled for low EMI, or set to normal operation with SSFM disabled.

• 350KHz to 440KHz spread spectrum (SSFM) range (R5 = 287k, JP2 = SSFM)
• 96% typical efficiency (VIN = 50V, VLED = 36V, ILED = 1.5A, with filters)
• 3.6A typical peak current limit
• 192Hz internally-generated PWM dimming frequency (JP3 = INT, JP4 = INT R12 = 118k, R5 = 287k)
• 41V open LED voltage VOUT (OVP) (R7 = 1M, R6 = 24.9k)