TPA2008D2PWPG4

TPA2008D2 www.ti.com SLOS413C – JULY 2003 – REVISED MAY 2004 3-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL FEATURES • • • • • • • DESCRIPTION 3 W Per Channel into 3-Ω Speakers (THD+N = 10%) – < 0.045% THD at 1.5 W, 1 kHz, 3-Ω Load DC Volume Control With 2-dB Steps From -38 dB to 20 dB Filter Free Modulation Scheme Operates Without a Large and Expensive LC Output Filter Extremely Efficient Third Generation 5-V Class-D Technology – Low Supply Current, 7 mA – Low Shutdown Control, 1 µA – Low Noise Floor, -80 dBV – Maximum Efficiency into 3 Ω, 78% – Maximum Efficiency into 8 Ω, 88% – PSRR, -70 dB Integrated Depop Circuitry Operating Temperature Range, -40°C to 85°C Space-Saving, Surface Mount PowerPAD™ Package APPLICATIONS • • • • The TPA2008D2 is a third generation 5-V class-D amplifier from Texas Instruments. Improvements to previous generation devices include: dc volume control, lower supply current, lower noise floor, higher efficiency, smaller packaging, and fewer external components. Most notably, a new filter-free class-D modulation technique allows the TPA2008D2 to directly drive the speakers, without needing a low-pass output filter consisting of two inductors and three capacitors per channel. Eliminating this output filter saves approximately 30% in system cost and 75% in PCB area. The improvements and functionality make this device ideal for LCD projectors, LCD monitors, powered speakers, and other applications that demand more battery life, reduced board space, and functionality that surpasses currently available class-D devices. A chip-level shutdown control limits total supply current to 1 µA, making the device ideal for battery-powered applications. Protection circuitry increases device reliability: thermal and short circuit. Undervoltage shutdown saves battery power for more essential devices when battery voltage drops to low levels. The TPA2008D2 is available in a 24-pin TSSOP PowerPAD™package. LCD Projectors LCD Monitors Powered Speakers Battery Operated and Space Constrained Systems EFFICIENCY vs OUTPUT POWER 100 8 Ω Speaker 90 4 Ω Speaker Efficiency − % 80 3 Ω Speaker 70 60 50 40 30 VDD = 5 V No Filter 20 10 0 0 0.5 1 1.5 2 2.5 PO − Output Power − W 3 3.5 THD+N − Total Harmonic Distortion + Noise − % TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 20 10 VDD = 5 V RL = 3 Ω Gain = 0 dB f = 1 kHz 1 f = 20 kHz 0.1 f = 20 Hz 0.01 0.01 0.1 1 4 PO − Output Power − W 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. PowerPAD is a trademark of Texas Instruments. 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 © 2003–2004, Texas Instruments Incorporated TPA2008D2 www.ti.com SLOS413C – JULY 2003 – REVISED MAY 2004 These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. AVAILABLE OPTIONS TSSOP PowerPAD (PWP) (1) (1) Device TPA2008D2PWP (1) Package Designator PWP (1) The PWP package is available taped and reeled. To order a taped and reeled part, add the suffix R to the part number (e.g., TPA2008D2PWPR). PWP PACKAGE (TOP VIEW) LINN LINP SHUTDOWN PVDDL LOUTP PGNDL PGNDL LOUTN PVDDL COSC ROSC AGND 2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 RINN RINP BYPASS PVDDR ROUTP PGNDR PGNDR ROUTN PVDDR NC VOLUME VDD TPA2008D2 www.ti.com SLOS413C – JULY 2003 – REVISED MAY 2004 TERMINAL FUNCTIONS TERMINAL NO. NAME I/O DESCRIPTION AGND 12 - Analog ground BYPASS 22 I Tap to voltage divider for internal mid-supply bias generator used for internal analog reference. COSC 10 I A capacitor connected to this terminal sets the oscillation frequency in conjunction with ROSC. For proper operation, connect a 220-pF capacitor from COSC to ground. LINN 1 I Negative differential audio input for left channel LINP 2 I Positive differential audio input for left channel LOUTN 8 O Negative audio output for left channel LOUTP 5 O Positive audio output for left channel NC 15 I No connection PGNDL 6, 7 - Power ground for left channel H-bridge PGNDR 18, 19 - Power ground for right channel H-bridge PVDDL 4, 9 PVDDR 16, 21 Power supply for left channel H-bridge Power supply for right channel H-bridge RINN 24 I Positive differential audio input for right channel RINP 23 I Negative differential audio input for right channel ROSC 11 I A resistor connected to the ROSC terminal sets the oscillation frequency in conjunction with COSC. For proper operation, connect a 120-kΩ resistor from ROSC to ground. ROUTN 17 O Negative output for right channel ROUTP 20 O Positive output for right channel SHUTDOWN 3 I Places the amplifer in shutdown mode if a TTL logic low is placed on this terminal; normal operation if a TTL logic high is placed on this terminal. VDD 13 - Analog power supply VOLUME 14 I DC volume control for setting the gain on the internal amplifiers. The dc voltage range is 0 to VDD. - - Connect to analog ground and the power grounds must be soldered down in all applications to properly secure device on the PCB. Thermal Pad 3 TPA2008D2 www.ti.com SLOS413C – JULY 2003 – REVISED MAY 2004 FUNCTIONAL BLOCK DIAGRAM VDD AGND PVDD VDD Gain Adj. RINN Gate Drive ROUTN PGND PVDD Gate Drive Gain Adj. RINP ROUTP PGND SHUTDOWN Volume Control VOLUME Biases and References Startup Protection Logic Ramp Generator COSC Short Circuit Protection Short Circuit Protection VDD ROSC Thermal BYPASS PVDD LINP Gain Adj. Gate Drive LOUTP PGND PVDD LINN Gain Adj. Gate Drive LOUTN PGND ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted (1) UNIT VDD,PVDD Supply voltage range VI (RINN, RINP, LINN, LINP, VOLUME) Input voltage range Continuous total power dissipation -0.3 V to 6 V 0 V to VDD See Dissipation Rating Table TA Operating free-air temperature range -40°C to 85°C TJ Operating junction temperature range -40°C to 150°C Tstg Storage temperature range -65°C to 85°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds (1) 4 260°C 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. TPA2008D2 www.ti.com SLOS413C – JULY 2003 – REVISED MAY 2004 DISSIPATION RATINGS TABLE PACKAGE TA≤ 25°C DERATING FACTOR TA = 70°C TA = 85°C PWP 2.18 W 21.8 mW/°C 1.2 W 872 mW RECOMMENDED OPERATING CONDITIONS MIN VDD Supply voltage Volume terminal voltage VIH High-level input voltage SHUTDOWN VIL Low-level input voltage SHUTDOWN MAX UNIT 4.5 5.5 V 0 VDD V 2 V 0.8 V PWM frequency 200 300 kHz TA Operating free-air temperature -40 85 °C TJ Operating junction temperature 125 °C ELECTRICAL CHARACTERISTICS TA= 25°C, VDD = PVDD = 5 V (unless otherwise noted) PARAMETER TEST CONDITIONS | VOS | Output offset voltage (measured differentially) VI = 0 V, AV = 20 dB, RL = 8Ω PSRR Power supply rejection ratio VDD = PVDD = 4.5 V to 5.5 V | IIH | High-level input current VDD = PVDD = 5.5 V, VI= VDD = PVDD | IIL | Low-level input current VDD = PVDD = 5.5 V, VI = 0 V IDD Supply current No filter (no load) IDD(max) RMS supply current at max power RL = 3 Ω, PO = 2.5 W/channel (stereo) IDD(SD) Supply current in shutdown mode SHUTDOWN = 0 V Drain-source on-state resistance VDD = 5 V, IO = 500 mA, TJ= 25°C rds(on) MIN TYP MAX 5 25 mV 1 µA -70 7 UNIT dB 1 µA 15 mA 1.8 A 50 1000 High side 450 600 Low side 450 600 TYP MAX nA mΩ OPERATING CHARACTERISTICS TA= 25°C, VDD = PVDD = 5 V, RL = 3 Ω, Gain = 0 dB (unless otherwise noted) PARAMETER TEST CONDITIONS f = 1 kHz, RL = 3 Ω, Stereo operation THD+N = 1% MIN 2.5 UNITS PO Output power THD+N Total harmonic distortion plus noise BOM Maximum output power bandwidth THD = 5% 20 kHz SNR Signal-to-noise ratio Maximum output at THD+N