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Overview
| Topology | Other Topology |
| Input voltage | 8-36 V |
| Switching frequency | 100-3000 kHz |
| Output 1 | 48.3 V / 18 A |
Description
The evaluation circuit EVAL-LTC7893-AZ is a single output synchronous step-up converter that drives GaN field effect transistors (FETs). The EVAL-LTC7893-AZ evaluation board features 100V GaN 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. The EVAL-LTC7893-AZ is set to 500kHz switching frequency, which results in a small and efficient circuit.
Features
GaN Drive Technology Fully Optimized for GaN FETsOutput Voltage Up to 100VWide VIN Range: 4V to 60V and Operates Down to 1V after Start-UpNo Catch, Clamp, or Bootstrap Diodes NeededInternal Smart Bootstrap Switches Prevent Overcharging of High-Side Driver SupplyResistor-Adjustable Dead TimesSplit-Output Gate Drivers for Adjustable Turn On and Turn Off Driver StrengthsAccurate Adjustable Driver Voltage and UVLOLow Operating IQ: 15μAProgrammable Frequency (100kHz to 3MHz)Synchronizable Frequency (100kHz to 3MHz)Spread Spectrum Frequency Modulation28-Lead (4mm × 5mm), Side Wettable, QFN PackageAEC-Q100 Qualified for Automotive Applications
Typical applications
- Telecommunications Power Systems
- Medical Systems
- Automotive and Industrial Power Systems
- Military Avionics
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Wire Type | L(mm) | Ti | Ø OD(mm) | Ø ID(mm) | Packaging | Qty. | Pins | Type | Mount | H(mm) | IR(A) | Working Voltage(V (AC)) | Operating Temperature | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCF SMT High Current Inductor, 3.1 µH, 33.15 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCF SMT High Current Inductor | Inductance3.1 µH | Performance Rated Current33.15 A | Saturation Current @ 10%41 A | Saturation Current @ 30%45 A | DC Resistance2.3 mΩ | Self Resonant Frequency29 MHz | Wire TypeFlat | Length20.8 mm | – | – | – | – | Packaging Unit100 | Pins2 | – | MountSMT | Height13.5 mm | Rated Current26 A | – | Operating Temperature -40 °C up to +125 °C | ||||
 | WA-SMSI SMT Steel Spacer with internal Thread M2, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWA-SMSI SMT Steel Spacer with internal Thread M2 | – | – | – | – | – | – | – | Length1 mm | Inner ThreadM2 | Outer Diameter4.35 mm | Inner Diameter2.8 mm | PackagingTape and Reel | Packaging Unit1500 | – | – | – | – | – | – | Operating Temperature -55 °C up to +150 °C | |||
 | WR-PHD Pin Header, –, – | Simulation– | Downloads7 files | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header | – | – | – | – | – | – | – | Length6 mm | – | – | – | PackagingBag | Packaging Unit1000 | Pins6 | TypeStraight | MountTHT | – | Rated Current2 A | Working Voltage200 V (AC) | Operating Temperature -40 °C up to +105 °C |