Texas Instruments TPA2035D1 User Manual

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2.75-W FIXED GAIN MONO FILTER-FREE CLASS-D AUDIO POWER AMPLIFIER
FEATURES
1
• Maximize Battery Life and Minimize Heat
2
– 0.5-µA Shutdown Current
– 3-mA Quiescent Current
– High Efficiency Class-D
– 88% at 400mW at 8Ω
– 80% at 100mW at 8Ω
• Short Circuit Auto-recovery
• Gain of 2 V/V (6dB)
• Only One External Component Required
– Internal Matched Input Gain and Feedback
Resistors for Excellent PSRR and CMRR
– Optimized PWM Output Stage Eliminates
LC Output Filter
– PSRR (–75 dB) and Wide Supply Voltage
(2.5 V to 5.5 V) Eliminates Need for a
Dedicated Voltage Regulator
– Fully Differential Design Reduces RF
Rectification and Eliminates Bypass
Capacitor
– CMRR (–69 dB)Eliminates Two Input
Coupling Capacitors
• Thermal and Short-Circuit Protection
• Pinout Similar to the TPA2010D1
• Wafer Chip Scale Packaging (WCSP)
– NanoFree™ (YZF)
IN−
Differential
Input
IN+
SHUTDOWN
1
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.
NanoFree is a trademark of Texas Instruments.
2
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.
APPLICATION CIRCUIT
Internal
V
DD
Oscillator
V
O −
PWM H−
_
Bridge
V
O +
+
GND
Bias
Circuitry
TPA2035D1
APPLICATIONS
• Wireless Handsets, PDAs, and other mobile
devices
DESCRIPTION
The TPA2035D1 is a 2.75-W high efficiency filter-free
class-D audio power amplifier in an approximately
1.5-mm × 1.5-mm wafer chip scale package (WCSP)
that requires only one external component. The
pinout is the same as the TPA2010D1 (SLOS417)
except that the external gain setting input resistors
required by the TPA2010D1 are integrated into the
fixed gain of the TPA2035D1.
Features like –75dB
RF-rectification immunity with a small PCB footprint
(WCSP amplifier plus single decoupling cap) make
the TPA2035D1 ideal for wireless handsets. A fast
start-up time of 3.2 ms with minimal pop makes the
TPA2035D1 ideal for PDA applications.
In wireless handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
TPA2035D1. The TPA2035D1 has a low 27-µV noise
floor, A-weighted.
To Battery
C
S
9-BALL WAFER CHIP SCALE, YZF PACKAGE,
1,4 mm
1,55 mm
Note: Pin A1 is marked with a "0" .
Copyright © 2008, Texas Instruments Incorporated
TPA2035D1
SLOS562 – AUGUST 2008
PSRR and improved
C
S
TPA
2035D1
2,5 mm
~
(TOP VIEW OF PCB)
GND V
IN+
O−
A1 A2 A3
V PV PGND
DD DD
B1
B2 B3
IN− SHUTDWN V
O+
C1 C2
C3
1,4 mm
1,55 mm