This design showcases a dual-phase automotive boost converter for Class-H audio applications using LMG2100R026 gallium nitride (GaN) half bridges and offering analog- or digital-output voltage tracking. The output power is 1000W at 11V input voltage (1250W peak at 12V). The converter area measures only 47mm × 48mm, not including the reverse polarity protection and bulk input capacitance.

This test report is based on the LM5125-Q1. The pin-compatible LM51251-Q1 variant offering additional I²C for diagnostics and control can also be used on this design.

• Very high power density
• Low switching losses due to GaN switches
• Digital and analog voltage tracking
• With I²C control (IC variant dependent)
• High efficiency and high peak output power

• Premium audio

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