TFA9881 Overview
The TFA9881 is a mono, filter-free class-D audio amplifier in a 9-bump WLCSP (Wafer Level Chip-Size Package) with a 400 m pitch. The digital input interface is an over-sampled Pulse Density Modulated (PDM) bit stream. The TFA9881 receives audio and control settings via this interface.
TFA9881 Key Features
- Small outline WLCSP9 package: 1.3 1.3 0.6 mm
- Wide supply voltage range (fully operational from 2.5 V to 5.5 V)
- High efficiency (90 %, 4 /20 H load) and low power dissipation
- Quiescent power
- 6.5 mW (VDDD = 1.8 V, VDDP = 3.6 V, 4 /20 H load, fclk = 2.048 MHz)
- 7.8 mW (VDDD = 1.8 V, VDDP = 3.6 V, 4 /20 H load, fclk = 6.144 MHz)
- Output power
- 1.4 W into 4 at 3.6 V supply (THD = 1 %)
- 2.7 W into 4 at 5.0 V supply (THD = 1 %)
- 3.4 W into 4 at 5.0 V supply (THD = 10 %)