The Technology

• **Silicon** — the traditional semiconductor used in chargers for decades. Reliable but limited in switching frequency and efficiency.
• **GaN (Gallium Nitride)** — a newer wide-bandgap semiconductor that switches faster, handles higher voltages, and generates less heat.

Size Comparison

GaN’s higher switching frequency allows smaller passive components (capacitors, transformers):

• A 65W silicon charger is typically ~90 × 45 × 35mm
• A 65W GaN charger is typically ~48 × 42 × 38mm
• GaN is roughly 40–50% smaller by volume

Efficiency & Heat

• Silicon efficiency: ~88–90%
• GaN efficiency: ~93–95%

Higher efficiency means less energy wasted as heat. GaN chargers run noticeably cooler, which improves reliability and allows compact housings without overheating.

Price

• Silicon chargers are cheaper to manufacture
• GaN chargers cost 15–30% more
• The price gap is narrowing as GaN production scales

For OEM brands, the price premium is often justified by the size and performance advantages that consumers value.

Verdict

| Feature | Silicon | GaN |

|———|———|—–|

| Size | Larger | 40–50% smaller |

| Efficiency | ~89% | ~94% |

| Heat | More | Less |

| Price | Lower | 15–30% more |

| Reliability | Good | Better (cooler) |

GaN is the clear winner for modern chargers. The size, efficiency, and thermal benefits make it the standard for premium chargers, and the price gap is small enough that most brands now choose GaN.