2-channel single-ended GaN class-D amplifier, 225 W/ch @ 4 Ω (CoolGaN + MERUS IRS20957)
← All reference designs · Vendor page: Infineon EVAL_AUDAMP24
| Hardware | orderable |
|---|---|
| Status | active |
| Application | audio |
| Semiconductors | GaN |
| Key devices | IGT40R070D1 E8220, IRS20957SPBF |
| Deliverables | schematic, bom, layout, design-guide |
| Channels | 2 |
| Output config | se |
| Power / ch (W) | 225 (vendor-claimed) |
| Load (Ω) | 4 |
| Power rated at THD+N (%) | 1 |
| Other ratings | power_W: 250; load_ohm: 8; thd_pct: 1; config: se; supply: ±63 V |
| Supply | 43–63 V |
| Modulation | self-oscillating |
| Spread spectrum | no |
| Last verified | 2026-10-21 |
Notes
Why it is interesting: a GaN half-bridge class-D stage where the benefit is narrower dead-time and hence lower THD, not efficiency. Power is quoted at 1 % THD+N, so it is directly comparable with other 1 % figures.
Check: 225 W into 4 Ω needs V_pk = √(2·225·4) = 42.4 V, i.e. essentially the full ±43 V rail. That leaves very little headroom: the 1 % figure sits right at the onset of clipping. Single-ended output needs a split rail (or a mid-rail bias), so supply.min/max are entered as rail magnitudes.
Tags: narrow-deadtime · gan-class-d · ocp-ovp-uvp-otp · clock-sync-option