BU7150NUV is an audio amplifier designed for single-cell battery operated audio products. It can be selected in single-ended mode for stereo headphone and BTL mode for mono speaker operations. At VDD = 1.5V, THD+N = 1%, the output power is 14mW at RL = 16Ω in single-ended mode and the output power is 85mW at RL = 8Ω in BTL mode.
This technical note describes the BU7150NUV compact headphone amplifier, a low‑voltage audio amplifier designed for single‑cell battery operation (0.93 V ~ 3.5 V). It outlines features such as wide battery voltage range, unity‑gain stability, click‑pop reduction, shutdown mode, and thermal protection.
The document includes absolute maximum ratings, operating conditions, detailed electrical characteristics, pin assignments, block diagram, application circuits for single‑ended and BTL modes, and ordering information. It is intended for designers of noise‑cancelling headphones, recorders, mobile phones, PDAs, and electronic toys.
| Supply Voltage (VDD) | 0.93 V ~ 3.5 V |
|---|---|
| Input Voltage (VIN) | VSS‑0.3 V ~ VDD+0.3 V |
| Input Current (IIN) | -10 mA ~ 10 mA |
| Power Dissipation (PD) | 560 mW |
| Storage Temperature Range | -55 °C ~ +150 °C |
| Operating Temperature Range | -40 °C ~ 85 °C |
| Maximum Output Power (SE mode, RL=16Ω) | 14 mW |
| Maximum Output Power (BTL mode, RL=8Ω) | 85 mW |
| THD+N (20 kHz, 1 kHz test) | 0.1 % ~ 0.5 % |
| Shutdown Current (ISD) | 3.9 µA |
The device operates from 0.93 V to 3.5 V supply voltage.
In BTL mode the maximum output power is 85 mW into an 8 Ω load.
The ripple on the supply line should not exceed 400 mV peak‑to‑peak.
The shutdown current (ISD) is 3.9 µA.