A W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL
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1 DESCRIPTION The is a stereo Class-D audio amplifier with volume control. It delivers up to 2.5W for each channel (5W in all) into a 3Ω load or 2W for each channel (4W in all) into a 4Ω load or 1.25W for each channel (2.5W in all) into an 8Ω load. The has differential input structure, it features high Common Mode Rejection Ratio and Power Supply Rejection Ratio. The is an analog input signal which is converted into digital output, its drives directly to the speaker. High power efficiency is achieved due to digital output at the load. The audio information is embedded in PWM (Pulse Width Modulation). The DC volume control is convenient for LCD projectors, LCD monitors, powered speakers, and other consumer products especially when using remote control. The is available in P-TSSOP20 and P-TSSOP24 package. TYPICAL APPLICATION (Schematics 1) FEATURES 2.5V to 6.0 V Single Supply 3mA/CH Quiescent Current BTL Output Requires No Output Capacitors Compatible with Earphone Application Compliance with RoHS in Pb Free DC Volume Control Differential 230KHz PWM Allows BTL to Increase Output Power Differential Signal Processing Improves CMRR & Eliminates Power Regulation Less Than 0.2uA/CH Shutdown Current Output Pin Short-Circuit Protection (Short to Other Outputs, Short to VCC, Short to Ground) Pop-Less Power-Up, Shutdown and Recovery Thermal Shutoff and Automatic Recovery Up to 5WRMS Power or 2.5WRMS/CH Up to 86% Power Efficiency Available in P-TSSOP20 and P-TSSOP24 Package APPLICATION Cellular Phones, PDAs DVD/CD Players, TFT LCD TVs/Monitors, LCD Projectors 2.1 Channel Audio Systems, Powered Speakers USB Audio Portable Wireless Radios ORDERING INFORMATION TMXP24 PACKAGE TYPE P-TSSOP20 P-TSSOP24 Note AiT provides all Pb free products Suffix V means Green Package PART NUMBER TMXP20R TMXP20VR TMXP20 TMXP20U TMXP20VU TMXP24R TMXP24VR TMXP24 TMXP24U TMPX24UR R: Tape & Reel U: Tube V: Green Package REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
2 PIN DESCIPTION Top View Pin # Symbol Type Func unctions 1 LINN I Negative Differential Input for Left Channel 2 LINP I Positive Differential Input for Left Channel 3 SDNB I Places the Amplifier 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 4, 8 PVDDL - Power Supply for Left Channel H-Bridge 5 LOUTP O Positive Output for Left Channel 6 PGNDL - Ground for Left Channel H-Bridge 7 LOUTN O Negative Output for Left Channel 9 NC - No Connection 10 AGND - Analog Ground 11 AVDD - Analog Power Supply 12 VOLUME I DC Volume Control 13, 17 PVDDR - Power Supply for Right Channel H-Bridge 14 ROUTN O Negative Output for Right Channel 15 PGNDR - Ground for Right Channel H-Bridge 16 ROUTP O Positive Output for Right Channel 18 BYPASS O Bypass 19 RINP I Positive Differential Input for Right Channel 20 RINN I Negative Differential Input for Right Channel REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
3 Top View Pin # Symbol Type Functions 1 LINN I Negative Differential Input for Left Channel 2 LINP I Positive Differential Input for Left Channel 3 SDNB I Places the Amplifier 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 4, 9 PVDDL - Power Supply for Left Channel H-Bridge 5 LOUTP O Positive Output for Left Channel 6.7 PGNDL - Ground for Left Channel H-Bridge 8 LOUTN O Negative Output for Left Channel 10, 11, 15 NC - No Connection 12 AGND - Analog Ground 13 AVDD - Analog Power Supply 14 VOLUME I DC Volume Control 16, 21 PVDDR - Power Supply for Right Channel H-Bridge 17 ROUTN O Negative Output for Right Channel 18, 19 PGNDR - Ground for Right Channel H-Bridge 20 ROUTP O Positive Output for Right Channel 22 BYPASS O Bypass 23 RINP I Positive Differential Input for Right Channel 24 RINN I Negative Differential Input for Right Channel REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
4 ABSOLUTE MAXIMUM RATINGS Supply Voltage, VDD, PVDD 0.3V ~ +6.0V Continuous Total Power Dissipation See Dissipation Rating Table Input Voltage, VI 0V ~ 5.5V Operation Free-Air Temperature, TA -20 C ~ +85 C Operating Junction Temperature, TJ -20 C ~ +150 C Storage Temperature, TSTG -65 C ~ +150 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. DISSIPATION SIPATION RATINGS TABLE Package TA 25 C Derating Factor TA=70 C TA=85 C TSSOP W 21.8mW/ C 1.2W 872mW TSSOP W 21.8mW/ C 1.2W 872mW RECOMMENDED OPEERATING CONDITIONS Parameter Typ. Unit Supply Voltage, VDD V PWM Frequency KHz High-Level Input Voltage, VIH SDNB 2 V Low-Level Input Voltage, VIL SDNB 0.8 V Operating Free-Air Temperature, TA C Operating Junction Temperature, TJ C REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
5 ELECTRICAL CHARACTERISTICS TA=25 C, VDD=PVDD=5V, unless otherwise noted Symbol Parameter Conditions Typ. Av Voltage Gain RL=8Ω, VOLUME=2.8V 18 db IDD Supply Current No Load 6 10 ma IDD(SD) Supply Current in Shutdown Mode SDNB=0V na PSRR Power Supply Rejection Ratio VDD=PVDD=3.5V to 5.5V -70 db RDS(ON) VDD=5V, Drain-Source on-state High Side IO=500mA, Resistance TJ=25 C Low Side mω Ri Input Resistance VOLUME=2.8V ~ 0V KΩ VOS Output Offset Voltage (Measured Differentially) VI=0V, Av=20dB, RL=8Ω mv IIH High-Level Input Current VDD=AVDD=5.5V, VI=5.8V (SDNB) 30 ua IIL Low-Level Input Current VDD=AVDD=5.5V, VI=-0.3V(SDNB) 1 ua Unit OPERATING CHARACTERISTICS TA=25 C, VDD=PVDD=5V, RL=8Ω speaker, Gain=18dB, unless otherwise noted Symbol Parameter Conditions Typ. Crosstalk Crosstalk Between Outputs VDD=AVDD=5V, Po=1W, RL=8Ω -68 db f=1khz, RL=3Ω, Stereo Output Power per Operation 2.5 W Po Channel (Limited by f=1khz, RL=4Ω, Stereo Thermal Condition) Operation 2 W f=1khz, RL=8Ω, Stereo Operation 1.25 W SNR Signal-to-Noise Ratio VDD=AVDD=5V, Po=1W, RL-=8Ω 95 db Total Harmonic Distortion RL=8Ω, Po=1.2W, f=1khz 0.4% Pulse Noise THD+N Thermal Trip Point 150 C Thermal Hysteresis 20 C VN Integrated Noise Floor 20Hz to 20KHz, Inputs AC Grounded Unit 85 uvrms REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
6 VOLTAGE RANGE OF VOLUME VOLUME AT DIFFERENT VDDV DD VDD 3V 0V 1.3V 3.6V 0V 1.9V 5V 0V 2.8V VOLTAGE GAIN AT TA=25 T O C, RL=8 =8Ω DD=PV =PVDD DD=5V Voltage Gain VDD Voltage of VOLUME 3V 16dB/-27dB 1.4V/0V 3.6V 18dB/-27dB 1.9V/0V 5V 18dB/-27dB 2.8V/0V Table 1. Typical DC Volume Control Voltage on VOLUME Pin Typical GAIN of Amplifier Voltage on VOLUME Pin Typical GAIN of Amplifier (V) (db) (V) (db) VDD Note:Not fully tested but guaranteed by design, Table 1 is only for V DD=5V REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
7 TYPICAL PERFORMANCE CHARACTERISTICS 1. Noise vs. Frequency VCC=3.6V to 5V, Input AC-Coupled to GND 2. Closed Loop Response VCC=5V, AV=10dB, RC LPF 3. THD+N vs. Frequency VCC=3.6V, RL=3Ω, AV=4.5dB 4. THD+N vs. Frequency VCC=5V, RL=3Ω, AV=4.9dB 5. THD+N vs. Frequency VCC=6V, RL=3Ω, AV=4.9dB 6. THD+N vs. Frequency VCC=3.6V, RL=4Ω, AV=8.9dB REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
8 7. THD+N vs. Frequency VCC=5V, RL=4Ω, AV=8.9dB 8. THD+N vs. Frequency VCC=6V, RL=4Ω, AV=8.9dB 9. THD+N vs. Frequency VCC=3.6V, RL=8Ω, AV=10dB 10. THD+N vs. Frequency VCC=5V, RL=8Ω, AV=10dB 11. THD+N vs. Frequency VCC=6V, RL=8Ω, AV=10dB 12. THD+N vs. Frequency VCC=3.6V, RL=8Ω, AV=4.5dB REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
9 13. THD+N vs. Frequency VCC=5V, RL=3Ω, AV=4.9dB 14. THD+N vs. Frequency VCC=6V, RL=3Ω, AV=4.9dB 15. THD+N vs. Frequency VCC=3.6V, RL=4Ω, AV=8.9dB 16. THD+N vs. Frequency VCC=5V, RL=4Ω, AV=8.9dB 17. THD+N vs. Frequency VCC=6V, RL=4Ω, AV=8.9dB 18. THD+N vs. Frequency VCC=3.6V, RL=8Ω, AV=10dB REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
10 19. THD+N vs. Frequency VCC=5V, RL=8Ω, AV=10dB 20. THD+N vs. Frequency VCC=6V, RL=8Ω, AV=10dB BLOCK DIAGRAM REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
11 PACKAGE INFORMATION Dimension in P-TSSOP20 Package (Unit:mm) REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
12 Dimension in P-TSSOP24 (Unit:mm) Symbol Nom. A A A b D E E 6.40 BSC e L BSC 1.00 REF L S θ 0-8 Pad Size E2 D E E REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
13 IMPORTANT NOTICE AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to discontinue any integrated circuit product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the information being relied on is current. AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT products in such applications is understood to be fully at the risk of the customer. As used herein may involve potential risks of death, personal injury, or servere property, or environmental damage. In order to minimize risks associated with the customer's applications, the customer should provide adequate design and operating safeguards. AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT warrants the performance of its products of the specifications applicable at the time of sale. REV1.1 - APR 2008 RELEASED JUN 2008 REVISED
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