Tai-1 Microelectronics
www.taimec.com.tw
TMPA401DM
May 25, 2005
15-W MONO CLASS-D AUDIO POWER AMPLIFIER
GENERAL DESCRIPTION
The TMPA401DM is a bridged-tied (BTL) Class-D audio amplifier for driving speakers with high power efficiency. It can drive 4Ω, 6Ω, 8Ω or 16Ω speakers. The output power can be up to 15W. No external heat-sink is necessary. The gain of the amplifier is defined by input resistance. The internally fully differential input structure provides good common mode rejection and power supply rejection. Thermal protection and short-circuit protection are
FEATURES
♦ 15-W Class-D Output ♦ Power efficiency is up to 82% ♦ Time delay for de-pop control ♦ Thermal Protection ♦ Output Pin Short-Circuit Protection (Short to Other Outputs, Short to VCC, Short to Ground) ♦ Differential / Single-Ended Input ♦ Low Supply Current (5mA Typical at 12V) ♦ Low Current in Shutdown Mode (<1µ A Typical) ♦ Separate VCC & PVCC
integrated for safety purpose. The internal de-pop circuitry eliminates pop noise at power-up & shutdown operations.
PACKAGE
TSSOP20 available
APPLICATIONS
LCD Monitors, TVs, DVD Players and Powered Speakers For best performance, please refer to
http://www.taimec.com.tw/data/Tmpa401EVM/tmpa401dmEVM.pdf
for PCB layout.
REFERENCE CIRCUIT
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Tai-1 Microelectronics
www.taimec.com.tw
TMPA401DM
May 25, 2005
TOP VIEW
(Please email
[email protected] for complete datasheet.)
Tai-1 Microelectronics reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers are responsible for their products and applications using Tai-1 Microelectronics components.
Note that the external components or PCB layout should be designed not to generate abnormal voltages to the chip to prevent from latch up which may cause damage to the device.
Typical Application
PVCC C6 S1 switch J1 VI+ R4 200k PHONEJACK STEREO R1 330Ω R3 VIR2 R8 0 12k 12k C5 1nF R5 22k R6 22k C1 1uF INP INN 0.1uF VCC J2 R7 100 PVCC 1 VCC 20 PVCC 2 SD 19 OUTP 3 INP 18 OUTP 4 INN 17 AGND PGND 5 16 VDD PGND 6 HF 15 RC OUTN 7 HF 14 AVDD OUTN 8 13 9 VDD PVCC 12 10AGND PVCC 11 D1 DIODE C7 0.1uF L3 33uH 33uH C14 1uF C13 1uF VOP (to 8ohm speaker) L4 D2 DIODE VON + C16 10uF
C2 1uF C3 1uF C4 1uF C9 0.1uF C15 1uF
401DM20
C8 0.1uF +
C10 10uF
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Tai-1 Microelectronics
www.taimec.com.tw
TMPA401DM
May 25, 2005
TERMINAL FUNCTIONS
TERMINAL I/O NAME AGND AVDD HFRC HFVDD INN INP OUTN OUTP PGND PVCC VCC VDD SD PIN NO 5,10 8 7 6 4 3 13,14 17,18 15,16 11,12,19,20 1 9 2 - I I O I I O O - - - O I Analog ground 5-V analog power supply De-pop control 2.5-V Reference for convenience of single-ended input Negative differential input Positive differential input Negative output Positive output Power ground Power supply for output MOS (8V to 15V) High-voltage power supply (8V to 15V) 5-V Reference output(25-mA ) Shutdown (Low valid) DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Over operating free-air temperature range unless otherwise noted(1) In normal mode Supply voltage, PVcc, Vcc In shutdown mode Input voltage, SD Continuous total power dissipation Operating free-air temperature, TA Operating junction temperature, TJ Storage temperature, Tstg -0.3V to 18V -0.3V to 18V -0.3V to Vcc+0.3V V V V
See package dissipation ratings 。 -20 to 85 C -20 to 150 -40 to 150 。 C 。 C
(1) Stresses beyond those listed under ”absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions “is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS
MIN
Supply voltage, VCC High-level input voltage, V IH Low-level input voltage, V IL Operating free-air temperature, TA PVCC, VCC SD SD -20 8 2.0 0.8 85
MAX
15
UNIT
V V V 。 C
PACKAGE DISSIPATION RATINGS
PACKGE TSSOP20(FD) DERATING FACTOR 30 mW/。 C TA ≤ 25。 C POWER RATING 3.75W TA = 70。 C POWER RATING 2.4W TA = 85。 C POWER RATING 1.95W
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Tai-1 Microelectronics
www.taimec.com.tw
TMPA401DM
May 25, 2005
DC CHARACTERISTICS
T A=25。 C, VCC=15V, RL=8Ω speaker (unless otherwise noted) PARAMETER
│VOS│ HFVDD AVDD/VDD ICC ICC(SD) BTL Output offset voltage Half VDD reference output 5-V Regulated voltage Quiescent current (no load) Supply current in shutdown mode
TEST CONDITIONS
INN and INP AC grounded Gain=20dB No load IO=0 to 25mA, SD =High, VCC=8V to 15V SD =High, VCC= 12V SD =High, VCC= 15V SD =0V, VCC= 12V SD =0V, VCC= 15V VCC=.