Class-D Audio Power Amplifier IC Tpa2005D1dgnr Integrated Circuit

Product Description

1.4-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
 
Features
• 1.4 W Into 8 Ω From a 5 V Supply at
THD = 10% (Typ)
• Maximum Battery Life and Minimum Heat
- Efficiency With an 8-ΩSpeaker:
- 84% at 400 mW
- 79% at 100 mW
- 2.8-mA Quiescent Current
- 0.5-μA Shutdown Current
• Capable of Driving an
8-Ω Speaker (2.5 V ≤ VDD ≤ 5.5 V) and a
4-Ω Speaker (2.5 V ≤ VDD ≤ 4.2 V)
• Only Three External Components
- Optimized PWM Output Stage Eliminates LC
Output Filter
- Internally Generated 250-kHz Switching
Frequency Eliminates Capacitor & Resistor
Improved PSRR (-71 dB at 217 Hz) and
Wide Supply Voltage (2.5 V to 5.5 V)
Eliminates Need for a Voltage Regulator
- Fully Differential Design Reduces RF
Rectification & Eliminates Bypass Capacitor
- Improved CMRR Eliminates Two Input
Coupling Capacitors
• Space Saving Package
- 3 mm × 3 mm QFN package (DRB)
- 2.5 mm × 2.5 mm MicroStar Junior™ BGA
Package (ZQY)
- 3 mm x 5 mm MSOP PowerPAD™ Package
(DGN)
• Use TPA2006D1 for 1.8 V Logic Compatibility on
Shutdown Pin
 
Applications
Ideal for Wireless or Cellular Handsets and PDAs
 
Description
The TPA2005D1 is a 1.4-W high efficiency filter-free
class-D audio power amplifier in a MicroStar Junior
BGA, QFN, or MSOP package that requires only
three external components.
Features like 84% efficiency, -71-dB PSRR
at 217 Hz, improved RF-rectification immunity, and
15 mm² total PCB area make the TPA2005D1 ideal
for cellular handsets. A fast start-up time of 9 ms with
minimal pop makes the TPA2005D1 ideal for PDA
Applications.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2005D1. The device allows independent gain
control by summing the signals from each function
while minimizing noise to only 48 μV_RMS
The TPA2005D1 has short-circuit and thermal
protection.