TPA2006D1 Datasheet, PDF (1/23 Pages) Texas Instruments – 1.45-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER WITH 1.8-V COMPATIBLE INPUT THRESHOLDS

TPA2006D1
www.ti.com
SLOS498 – SEPTEMBER 2006
1.45-W MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER WITH 1.8-V
COMPATIBLE INPUT THRESHOLDS
FEATURES
• Maximum Battery Life and Minimum Heat
– Efficiency With an 8-Ω Speaker:
• 88% at 400 mW
• 80% at 100 mW
– 2.8-mA Quiescent Current
– 0.5-µA Shutdown Current
• Shutdown Pin has 1.8-V Compatible
Thresholds
• Only Three External Components
• Optimized PWM Output Stage Eliminates
LC Output Filter
• Internally Generated 250-kHz Switching
Frequency Eliminates Capacitor and
Resistor
• Improved PSRR (–75 dB) and Wide
Supply Voltage (2.5 V to 5.5 V) Eliminates
Need for a Voltage Regulator
• Fully Differential Design Reduces RF
Rectification and Eliminates Bypass
Capacitor
• Improved CMRR Eliminates Two Input
Coupling Capacitors
• Space Saving 3 mm x 3 mm QFN Package
(DRB)
APPLICATIONS
• Ideal for Wireless or Cellular Handsets and
PDAs
DESCRIPTION
The TPA2006D1 is a 1.45-W high efficiency
filter-free class-D audio power amplifier in a 3 mm ×
3 mm QFN package that requires only three external
components. The SHUTDOWN pin is fully
compatible with 1.8-V logic GPIO, such as are used
on low power cellular chipsets.
Features like 88% efficiency, –75-dB PSRR,
improved RF-rectification immunity, and very small
total PCB footprint make the TPA2006D1 ideal for
cellular handsets. A fast start-up time of 1 ms with
minimal pop makes the TPA2006D1 ideal for PDA
applications.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2006D1. The TPA2006D1 allows independent
gain while summing signals from separate sources,
and has a low 36 µV noise floor, A-weighted.
APPLICATION CIRCUIT
+ ^RI
Differential
Input
- ^RI
SHUTDOWN
Internal
Oscillator
To Battery
V_DD
C_S
IN+
+
_
PWM
H-
V_O+
Bridge
V_O-
IN-
Bias
Circuitry
GND
TPA2006D1
8-PIN QFN (DRB) PACKAGE
(TOP VIEW)
SHUTDOWN ¹
NC 2
IN+ 3
IN− 4
8 _VO−
7 GND
6 V_DD
5 VO+
NC − No internal connection
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006, Texas Instruments Incorporated