EVAL-LTC7893-AZ

EVAL-LTC7893-AZ evaluation circuit is a single output synchronous step-up converter that drives GaN field effect transistors (FETs). The EVAL-LTC7893-AZ features the LTC®7893: a low quiescent current, high frequency (programmable fixed frequency from 100KHz up to 3MHz), step-up DC/DC synchronous controller, with a dedicated driver feature for GaN FETs, which can also be used to drive logic-level silicon FETs. The EVAL-LTC7893-AZ operates over an input voltage range from 8V to 36V and produces a 48V output with load current up to 18A (without heatsink). A mode selector allows the EVAL-LTC7893-AZ to operate in forced continuous operation, pulse-skipping or Burst Mode® operation during light loads. It is set to 500KHz switching frequency, which results in a small and efficient circuit.

• 46.9V to 49.8V output voltage range (VIN = 8V–36V)
• 500mVP-P output voltage ripple, VOUT(AC) at VIN = 12V, IOUT = 5.5A
• 3.5A maximum load IOUT (VIN = 8V, maximum component temperature <100°C)
• 98.2% efficiency (VIN = 24V, VOUT = 48V, IOUT2 = 11A)
• 180mA typical input current (FCM, VIN = 12V, IOUT = 0A)