TPA3106D1 HLQFP www.ti.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com 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. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) UNIT VCC Supply voltage VI Input voltage AVCC, PVCC –0.3 V to 30 V SHUTDOWN, MUTE –0.3 V to VCC + 0.
TPA3106D1 www.ti.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 32-PIN HTQFP (VFP) (TOP VIEW) TERMINAL FUNCTIONS TERMINAL NAME NO. I/O DESCRIPTION SHUTDOWN 29 I Active low. Shutdown signal for IC (LOW = disabled, HIGH = operational). TTL logic levels with compliance to AVCC. INP 1 I Positive audio input INN 2 I Negative audio input GAIN0 5 I Gain select least significant bit. TTL logic levels with compliance to VREG. GAIN1 6 I Gain select most significant bit.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com TERMINAL FUNCTIONS (continued) TERMINAL NAME NO. I/O DESCRIPTION Master/Slave select for determining direction of SYNC terminal. HIGH=Master mode, SYNC terminal is an output; LOW = slave mode, SYNC terminal accepts a clock input. TTL logic levels with compliance to VREG. MSTR/SLV 7 I SYNC 8 I/O Clock input/output for synchronizing multiple class-D devices. Direction determined by MSTR/SLV terminal.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS Table 1.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY THD+N - Total Harmonic Distortion + Noise - % THD+N - Total Harmonic Distortion + Noise - % 10 VCC = 24 V, RL = 8 W, Gain = 20 dB PO = 5 W 1 0.1 PO = 10 W PO = 1 W 0.01 0.003 20 100 TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY VCC = 18 V, L = 22 mH, C = 1 mF, Gain = 20 dB PO = 5 W 0.2 0.05 PO = 10 W PO = 1 W 0.02 0.01 0.005 0.002 0.001 20 0.5 0.2 0.1 PO = 1 W 0.05 0.02 0.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 20 VCC = 12 V, THD+N - Total Harmonic Distortion + Noise - % THD+N - Total Harmonic Distortion + Noise - % 20 RL = 8 W, Gain = 20 dB 1 1 kHz 10 kHz 0.1 20 Hz 0.01 10m 100m 1 10 VCC = 18 V, RL = 8 W, Gain = 20 dB 1 10 kHz 20 Hz 0.1 1 kHz 0.01 10m 10 20 40 100m PO - Output Power - W Figure 8.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER 10 10 THD+N - Total Harmonic Distortion + Noise - % RL = 6 W, L = 22 mH, C = 1 mF, Gain = 20 dB 1 1 kHz 10 kHz 0.1 20 Hz 0.01 10m 1 100m PO - Output Power - W 10 VCC = 12 V, RL = 4 W, L = 15 mH, C = 2 mF, Gain = 20 dB 1 1 kHz 10 kHz 0.1 20 Hz 0.01 10m 50 100m 1 Figure 11. Figure 12.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 OUTPUT POWER vs SUPPLY VOLTAGE OUTPUT POWER vs SUPPLY VOLTAGE 45 25 RL = 8 W Gain = 20 dB 40 20 PO − Output Power − W Power Out – W THD+N=10% 15 10 THD+N=1% 35 30 THD+N = 10% 25 THD+N = 1% 20 15 5 10 RL = 4 W Gain = 20 dB 0 10 11 12 13 Supply Voltage – V 5 14 10 12 16 14 18 20 22 24 26 VCC - Supply Voltage - V Figure 15. Figure 16.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com EFFICIENCY vs OUTPUT POWER (BTL) SUPPLY CURRENT vs TOTAL OUTPUT POWER 100 2.5 VCC = 18 V VCC = 12 V RL = 8 Ω Gain = 32 dB 90 VCC = 24 V 70 Efficiency –% 2 ICC − Supply Current − A 80 60 50 40 30 20 10 0 0.1 VCC = 18 V VCC = 12 V 1.5 VCC = 24 V 1 0.5 RL = 8 W 3 7 11 15 19 23 27 31 0 35 39 0 10 Power Out – W PLACE HOLDER Figure 20.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 SUPPLY RIPPLE REJECTION RATIO vs FREQUENCY SUPPLY RIPPLE REJECTION RATIO vs FREQUENCY +0 VCC = 18 V, Vripple = 200 mVp-p -20 PSRR - Power Supply Rejection Ratio - dB PSRR - Power Supply Rejection Ratio - dB +0 RL = 8 W -40 -60 -80 -100 VCC = 24 V, Vripple = 200 mVp-p RL = 8 W -20 -40 -60 -80 -100 20 100 1k f - Frequency - Hz 10k 20k 20 Figure 23. 100 1k f - Frequency - Hz 10k 20k Figure 24.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com APPLICATION INFORMATION 1 mF 220 mF SDZ MUTE FAULT PGND PVCC SDZ PVCC MUTE AVCC FAULT Analog Audio In PVCC VCC 1 mF 10 mF VCC INP PGND INN BSP 1.0 mF 1.0 mF AGND GAIN0 OUTN GAIN1 GAIN1 OUTN VCC 220 mF 1 mF 1 mF 1 mF 1nF 1μF 1μF 33 mH 20 Ω PGND PVCC PVCC AGND 10nF VCLAMP PGND VBYP BSN SYNC ROSC MSTR/SLV VREG C17 1nF OUTP TPA3106D1 GAIN0 SYNC 33 mH OUTP AGND MSTR/SLV 20 Ω 0.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 CLASS-D OPERATION This section focuses on the class-D operation of the TPA3106D1. Traditional Class-D Modulation Scheme The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output where each output is 180 degrees out-of-phase and changes from ground to the supply voltage, VCC.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com OUTP OUTN Differential Voltage Across Load Output = 0 V +12 V 0V -12 V Current OUTP OUTN Differential Voltage Across Load Output > 0 V +12 V 0V -12 V Current Figure 27.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 When to Use an Output Filter for EMI Suppression Design the TPA3106D1 without the filter if the traces from amplifier to speaker are short (< 10 cm). Powered speakers, where the speaker is in the same enclosure as the amplifier, is a typical application for class-D without a filter. Most applications require a ferrite bead filter.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com Adaptive Dynamic Range Control TPA3106D1 V - Voltage = 1 V/div V - Voltage = 10 V/div TPA3106D1 Nearest Competitor Nearest Competitor t - Time = 20 ms/div t - Time = 100 ms/div Figure 31. 1-kHz Sine Output at 10% THD+N Figure 32.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 INPUT RESISTANCE Changing the gain setting can vary the input resistance of the amplifier from its smallest value, 16 kΩ ±20%, to the largest value, 32 kΩ ±20%. As a result, if a single capacitor is used in the input high-pass filter, the –3 dB or cutoff frequency may change when changing gain steps. Zf Ci IN Input Signal Zi The –3-dB frequency can be calculated using Equation 1. Use the ZI values given in Table 2.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com Power Supply Decoupling, CS The TPA3106D1 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure that the output total harmonic distortion (THD) is as low as possible. Power supply decoupling also prevents oscillations for long lead lengths between the amplifier and the speaker.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 ROSC Resistor Selection The resistor connected to the ROSC terminal controls the class-D output switching frequency using Equation 4: 1 FOSC = 2 x ROSC x COSC (4) COSC is an internal capacitor that is nominally equal to 20 pF. Variation over process and temperature can result in a ±15% change in this capacitor value.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com MUTE OPERATION The MUTE pin is an input for controlling the output state of the TPA3106D1. A logic high on this terminal disables the outputs. A logic low on this pin enables the outputs. This terminal may be used as a quick disable/enable of outputs when changing channels on a television or transitioning between different audio sources. The MUTE terminal should never be left floating.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 SHORT-CIRCUIT PROTECTION AND AUTOMATIC RECOVERY FEATURE The TPA3106D1 has short-circuit protection circuitry on the outputs that prevents damage to the device during output-to-output shorts, output-to-GND shorts, and output-to-VCC shorts. When a short circuit is detected on the outputs, the part immediately disables the output drive. This is a latched fault and must be reset by cycling the voltage on the SHUTDOWN pin or MUTE pin.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com PRINTED-CIRCUIT BOARD (PCB) LAYOUT GENERAL GUIDELINES Because the TPA3106D1 is a class-D amplifier that switches at a high frequency, the layout of the printed-circuit board (PCB) should be optimized according to the following guidelines for the best possible performance. • Decoupling capacitors—The high-frequency 1-mF decoupling capacitors should be placed as close to the PVCC and AVCC terminals as possible.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 Power Supply Signal Generator APA RL Analyzer 20 Hz - 20 kHz (a) Basic Class-AB Power Supply Low-Pass RC Filter Signal Generator Class-D APA RL (See note A) Low-Pass RC Filter Analyzer 20 Hz - 20 kHz (b) Filter-Free and Traditional Class-D A. For efficiency measurements with filter-free Class-D, RL should be an inductive load like a speaker. Figure 34.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com DIFFERENTIAL INPUT AND BTL OUTPUT All of the class-D APAs and many class-AB APAs have differential inputs and bridge-tied load (BTL) outputs. Differential inputs have two input pins per channel and amplify the difference in voltage between the pins. Differential inputs reduce the common-mode noise and distortion of the input circuit. BTL is a term commonly used in audio to describe differential outputs.
TPA3106D1 www.ti.com SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 CLASS-D RC LOW-PASS FILTER An RC filter is used to reduce the square-wave output when the analyzer inputs cannot process the pulse-width modulated class-D output waveform. This filter has little effect on the measurement accuracy because the cutoff frequency is set above the audio band.
TPA3106D1 SLOS516C – OCTOBER 2007 – REVISED AUGUST 2010 www.ti.com Table 4 shows recommended values of RFILT and CFILT based on common component values. The value of fC was originally calculated to be 28 kHz for an fMAX of 20 kHz. CFILT, however, was calculated to be 57,000 pF, but the nearest values of 56,000 pF and 51,000 pF were not available. A 47,000-pF capacitor was used instead, and fC is 34 kHz, which is above the desired value of 28 kHz. Table 4.
PACKAGE OPTION ADDENDUM www.ti.
PACKAGE OPTION ADDENDUM www.ti.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
