BD88xxxGUL is an output coupling capacitorless headphone amplifier. This IC has a built-in regulated type negative voltage generator and generates the direct regulated negative voltage from the supply voltage. It is possible to drive headphones in a ground standard with both voltage of the positive voltage (+2.4V) and the negative voltage (-2.4V). Therefore a large-capacity output coupling capacitor becomes needless and can reduce a cost, a board area, and the height of the part. In addition, there is not the signal decrement by the low range to happen by output coupling capacitor and output load impedance and can output a rich low tone.
The BD884xxGUL series are capacitor‑less headphone amplifier ICs that generate a regulated negative supply internally, allowing operation with a single positive supply (2.4 V to 5.5 V). They provide ground‑referenced outputs, low THD+N, low supply current, and integrated short‑circuit and thermal‑overload protection. Gain can be set externally for each part (e.g., –1.0 V/V for BD88410GUL).
These devices are intended for portable audio applications such as mobile phones, tablets, digital cameras, Bluetooth headsets, and other consumer electronics. The note includes absolute maximum ratings, operating conditions, detailed electrical characteristics, characteristic curves, and packaging/tape‑and‑reel information.
| Supply Voltage Range | 2.4 V – 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C – +85 °C |
| Maximum Output Power | > 30 mW (20 kHz LPF, single channel) |
| THD+N (Typical) | 0.008 % – 0.056 % |
| Package | VCSPSOL2 (2.1 mm × 2.1 mm) |
The devices operate from 2.4 V up to 5.5 V.
BD88410GUL provides a fixed gain of –1.0 V/V.
They are supplied in a VCSPSOL2 package measuring 2.1 mm × 2.1 mm.