1FEATURES
• Powerful Mono Class-D Speaker Amplifier
– 3.24 W (4 Ω, 5 V, 10% THDN)
– 2.57 W (4 Ω, 5 V, 1% THDN)
– 1.80 W (8 Ω, 5 V, 10% THDN)
– 1.46 W (8 Ω, 5 V, 1% THDN)
• +6 dB Fixed Gain
• Integrated Image Reject Filter for DAC Noise
Reduction
• Low Output Noise of 20 mV
• Low Quiescent Current of 1.5 mA
• Differential Input Impedance of 300 kΩ
• Auto-Recovering Short-Circuit Protection
• Thermal-Overload Protection
• Filter-Free Mono Class-D Amp
• 9-Ball 1,21 mm × 1,16 mm 0,4mm Pitch WCSP

APPLICATIONS
• Wireless or Cellular Handsets and PDAs
• Portable Navigation Devices
• General Portable Audio Devices

DESCRIPTION
The TPA2037D1 is a 3.2 W high efficiency filter-free class-D audio power amplifier (class-D amp) with
6 dB of fixed gain in a 1.21 mm x 1.16 mm wafer chip
scale package (WCSP). The device requires only one
external component.
Features like 95% efficiency, 1.5 mA quiescent
current, 0.1 mA shutdown current, 81-dB PSRR,
20 mV output noise, and improved RF immunity make
the TPA2037D1 class-D amplifier ideal for cellular
handsets. A start-up time of 4 ms with no audible pop
makes the TPA2037D1 ideal for PDA and
smart-phone applications.