TPA2100P1 Datasheet, PDF (1/23 Pages) Texas Instruments – 19-VPP Mono Class-D Audio Amplifier for Piezo/Ceramic Speakers

YZH
TPA2100P1
www.ti.com ........................................................................................................................................................................................... SLOS595 – DECEMBER 2008
19-V_PP Mono Class-D Audio Amplifier for Piezo/Ceramic Speakers
FEATURES
1
•2 19 V_PP Output Load Voltage From a 2.5 V
Supply
• Integrated DC-DC Converter Generates 10 V
Supply
• No External Schottky Diode Required
• Integrated Audio Input Low-Pass Filter
• Small Boost Converter Inductor
• Supply Voltage Range From 2.5 V to 5.5 V
• Selectable Gain of 12 dB, 16 dB, and 24 dB
• Independent Shutdown Control for the Boost
Converter and the Audio Amplifier
• Fast Startup Time: 8 ms
• Low Supply Current: 5.5 mA
• Low Shutdown Current: < 1 µA
• Short-Circuit and Thermal Protection
• Space Saving Package
– 2,1 mm × 2,1 mm NanoFree™ WCSP (YZH)
APPLICATIONS
• Wireless or Cellular Handsets
• Portable DVD Player
• Personal Digital Assistants (PDAs)
• Electronic Dictionaries
• Digital Still Cameras
DESCRIPTION
The TPA2100P1 (sometimes referred to as TPA2100)
is a mono, Class-D audio power amplifier with
integrated DC-DC converter designed for piezo and
ceramic speakers. The TPA2100P1 (TPA2100) is
capable of driving a ceramic / piezo speaker with
19 V_PP (6.7 V_RMS) from a 2.5 V power supply at less
than 1% THD+N.
The DC-DC converter operates at a fixed frequency
of 1.2 MHz. The TPA2100P1 (TPA2100) DC-DC
converter provides a 10 V supply with a minimum
number of external components. The DC-DC
converter can be used to drive other components that
require a 10 V supply voltage (note: audio signal
must be present for proper functionality of boost
converter).
The TPA2100P1 (TPA2100) features an integrated
audio low pass filter that rejects high frequency noise
(CODEC out-of-band and RF noise) thus improving
audio fidelity.
The TPA2100P1 (TPA2100) has three gain modes of
12 dB, 16 dB, and 24 dB. The TPA2100P1
(TPA2100) provides thermal and short circuit
protection on the boost converter and the Class-D
audio amplifier. The TPA2100P1 (TPA2100) is
available in a 16-ball 2,1 mm × 2,1 mm WCSP
package. The TPA2100P1 (TPA2100) requires only
one small external inductor for operation.
V_IN
2.5 V to
5.5 V
Analog
Baseband
or
CODEC
10 mF
CIN
1 mF
CIN
4.7 mH _{10 nF}
Vdd SW
BST VccOUT
VccIN
IN-
OUT+
5 ~ 10 W
IN+
5 ~ 10 W
OUT-
10 mF
Piezo Speaker
0.1 ~ 2 mF
Digital
BaseBand
GAIN
SD
SDa
GND
Vref
GND
1 mF
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.
Copyright © 2008, Texas Instruments Incorporated