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reference designLT8419 | Demoboard EVAL-LT8419-AZ

Analog Devices LT8419 | Demoboard EVAL-LT8419-AZ

100V Half-Bridge GaN Driver with Single-Pin, Three-State PWM Input, Smart Integrated Bootstrap Switch, and Adjustable Dead Time

Overview

TopologyHalf-Bridge Converter Nonisolated
Input voltage48 V

Description

The EVAL-LT8419-AZ evaluation board features the LT8419 driving two 100V enhanced gallium nitride (eGaN) devices in a half-bridge configuration. The circuit is optimized as a buck converter with 48VHV to 24/12VLV at a 1MHz switching frequency, but it can be used as a boost converter or other converter topologies consisting of a half-bridge.An external PWM signal is required to drive the board. The LT8419 driver has powerful 0.2Ω pull-down and 0.6Ω pull-up drivers to control the gates of the two 100V GaN devices. It also integrates a smart integrated bootstrap switch to generate a balanced bootstrap voltage from VCC with a minimum dropout voltage. The LT8419 provides split gate drivers to adjust the turn-on and turn-off slew rates of the GaN devices to suppress ringing and optimize EMI performance.

Typical applications

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Parts approved by Analog Devices

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Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
RDC max.(mΩ)
fres(MHz)
Mount
SamplesAvailability & Sample
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744393605047
SPECWE-XHMI SMT Power Inductor, 4.7 µH, 27.9 A
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Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-XHMI SMT Power Inductor
Inductance4.7 µH
Performance Rated Current27.9 A
Saturation Current @ 30%28 A
DC Resistance3.8 mΩ
DC Resistance4.5 mΩ
Self Resonant Frequency15 MHz
MountSMT 
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