TS2007 3W filter-free Class D audio power amplifer with 6-12dB fixed gain select Features ■ Operating range from VCC=2.4V to 5.5V ■ Standby mode active low ■ Output power: 1.4W @5V or 0.45W @ 3.0V into 8Ω with 1% THD+N max. ■ Output power: 2.3W @5V or 0.75W @ 3.0V into 4Ω with 1% THD+N max. ■ Fixed gain select: 6dB or 12dB ■ Low current consumption ■ Efficiency: 88% typ. ■ Signal-to-noise ratio: 94dB typ. ■ PSRR: 63dB typ @ 217Hz with 6dB gain. ■ PWM base frequency: 280kHz ■ Low pop & click noise ■ Thermal shutdown protection ■ DFN8 3x3mm package TS2007IQT - DFN8 TS2007IQT - DFN8 Applications ■ Cellular phone ■ PDA ■ Notebook PC 1 8 2 7 3 6 4 5 Description The TS2007 is a class D power audio amplifier. Able to drive up to 1.4W into an 8 Ω load at 5V, it achieves outstanding efficiency compared to typical class AB audio power amplifier. The TS2007 is available in DFN8 3x3mm leadfree packages. This device allows to switch between two different gains: 6 or 12dB via a logic signal on the GS pin. A pop & click reduction circuitry provides low on/off switch noise while allowing the device to start within 5ms. A standby function (active low) allows to lower the current consumption down to 10nA typ. May 2007 Rev 3 1/29 www.st.com 29 Contents TS2007 Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 3.1 Electrical characteristic tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.2 Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.3 Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.4 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.5 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.6 Wake-up time (twu) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.7 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.8 Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.9 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.10 Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 2/29 TS2007 1 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol VCC Vi Parameter Value Unit 6 V GND to VCC V Supply voltage (1) Input voltage (2) Toper Operating free air temperature range -40 to + 85 °C Tstg Storage temperature -65 to +150 °C 150 °C Tj Rthja Pd Maximum junction temperature Thermal resistance junction to ambient (3) Power dissipation 200 Internally limited ESD HBM: human body model ESD MM: machine model Latch-up Latch-up immunity °C/W (4) 2 kV 200 V Class A Lead temperature (soldering, 10sec) 260 °C 1. All voltage values are measured with respect to the ground pin. 2. The magnitude of the input signal must never exceed VCC + 0.3V / GND - 0.3V. 3. The device is protected in case of over temperature by a thermal shutdown active @ 150°C. 4. Exceeding the power derating curves during a long period will cause abnormal operation. Table 2. Operating conditions Symbol VCC Parameter Supply voltage VI Input voltage range Vic Input common mode voltage(1) VSTBY Standby voltage input (2) Device ON Device OFF GS Gain select input: Gain =12dB Gain = 6dB RL Load resistor Rthja Thermal resistance junction to ambient (4) Value Unit 2.4 to 5.5 V GND to VCC V GND+0.15V to VCC0.7V V 1.4 ≤ VSTBY ≤ VCC GND ≤ VSTBY ≤ 0.4 (3) V GND ≤ VGS ≤ 0.4 1.4 ≤ VGS ≤ VCC V ≥4 Ω 40 °C/W 1. I Voo I ≤ 35mV max with both differential gains. 2. Without any signal on VSTBY, the device is in standby (internal 300kΩ pull down resistor). 3. Minimum current consumption is obtained when VSTBY = GND. 4. When mounted on 4-layer PCB. 3/29 Typical application 2 TS2007 Typical application Figure 1. Typical application schematics VCC VCC Cs 2 Input capacitors are optional In- GS Cin 4 Differential Input 6 1uF INGain Select 3 IN+ TS2007 Vcc OUT+ PWM + H Bridge 8 Speaker 5 OUT- Cin In+ Standby Control Oscillator Standby 7 1 Gnd VCC VCC VCC Cs 2 Input capacitors are optional In- GS Cin 4 Differential Input 6 1uF INGain Select 3 IN+ Vcc 15 μH OUT+ PWM + H Bridge Standby Control 2μF 8 Load 5 OUT- Cin In+ 4Ω LC Output Filter TS2007 15 μH 2μF Oscillator Gnd 30 μH 1μF 7 1 Standby 30 μH 1μF 8Ω LC Output Filter VCC Table 3. External component descriptions Components 4/29 Functional description CS Supply capacitor that provides power supply filtering. Cin Input coupling capacitors (optional) that block the DC voltage at the amplifier input terminal. The capacitors also form a high pass filter with Zin (Fcl = 1 / (2 x Pi x Zin x Cin)). TS2007 Typical application Table 4. Pin descriptions Pin number Pin name Pin description 1 STBY 2 GS Gain select input 3 IN+ Positive differential input 4 IN- Negative differential input 5 OUT- Negative differential output 6 VCC Power supply 7 GND Ground 8 OUT+ Positive differential output Standby pin ( active low ) 5/29 Electrical characteristics TS2007 3 Electrical characteristics 3.1 Electrical characteristic tables Table 5. VCC = +5V, GND = 0V, Vic=2.5V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY Parameter Typ. Max. Unit Supply current No input signal, no load 2.3 3.3 mA Standby current (1) No input signal, VSTBY = GND 10 1000 nA 25 mV Voo Output offset voltage Floating inputs, RL = 8Ω Po Output power THD = 1% max, f = 1kHz, RL = 4Ω THD = 1% max, f = 1kHz, RL = 8Ω THD = 10% max, f = 1kHz, RL = 4Ω THD = 10% max, f = 1kHz, RL = 8Ω THD + N Total harmonic distortion + noise Po = 1WRMS, G = 6dB, f =1kHz, RL = 8Ω Efficiency Min. 2.3 1.4 2.8 1.7 W 0.4 % Efficiency Po = 2.1 WRMS, RL = 4Ω (with LC output filter) Po = 1.3 WRMS, RL = 8Ω (with LC output filter) 84 90 % PSRR Power supply rejection ratio with inputs grounded, Cin=1µF (2) f = 217Hz, RL = 8Ω, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8Ω, Gain=12dB, Vripple = 200mVpp 63 60 dB CMRR Common mode rejection ratio 20Hz < f < 20kHz 60 dB 12 6 12.5 6.5 dB Single input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal to noise ratio (A-weighting) Po=1.5W, RL=4Ω (with LC output filter) 94 tWU Wake-up time 5 Zin 6/29 Gain value GS =0V GS = VCC 11.5 5.5 Gain dB 10 ms TS2007 Table 5. Electrical characteristics VCC = +5V, GND = 0V, Vic=2.5V, Tamb = 25°C (unless otherwise specified) (continued) Symbol tSTBY VN Parameter Min. Typ. Standby time 5 Output voltage noise f = 20Hz to 20kHz, RL=4Ω Unweighted (Filterless, G=6dB) A-weighted (Filterless, G=6dB) Unweighted (with LC output filter, G=6dB) A-weighted (with LC output filter, G=6dB) Unweighted (Filterless, G=12dB) A-weighted (Filterless, G=12dB) Unweighted (with LC output filter, G=12dB) A-weighted (with LC output filter, G=12dB) 74 50 69 49 94 65 86 64 Max. Unit ms μVRMS 1. Standby mode is active when VSTBY is tied to GND. 2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz. 3. Independent of Gain configuration (6 or 12dB) and between IN+ or IN- and GND. 7/29 Electrical characteristics Table 6. VCC = +4.2V, GND = 0V, Vic=2.1V, Tamb = 25°C (unless otherwise specified)(1) Symbol ICC ICC-STBY TS2007 Parameter Typ. Max. Unit Supply current No input signal, no load 2.1 3 mA Standby current (2) No input signal, VSTBY = GND 10 1000 nA 25 mV Voo Output offset voltage Floating inputs, RL = 8Ω Po Output power THD = 1% max, f = 1kHz, RL = 4Ω THD = 1% max, f = 1kHz, RL = 8Ω THD = 10% max, f = 1kHz, RL = 4Ω THD = 10% max, f = 1kHz, RL = 8Ω THD + N Total harmonic distortion + noise Po = 800mWRMS, G = 6dB, f =1kHz, RL = 8Ω Efficiency Min. 1.6 0.95 1.95 1.1 W 0.45 % Efficiency Po = 1.5 WRMS, RL = 4Ω (with LC output filter) Po = 0.95 WRMS, RL = 8Ω (with LC output filter) 85 90 % PSRR Power supply rejection ratio with inputs grounded, Cin=1µF (3) f = 217Hz, RL = 8Ω, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8Ω, Gain=12dB, Vripple = 200mVpp 63 60 dB CMRR Common mode rejection ratio 20Hz < f < 20kHz 60 dB Gain value GS = 0V GS = VCC 11.5 5.5 12 6 12.5 6.5 dB Single input impedance (4) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal to noise ratio (A-weighting) Po=1.2W, RL=4Ω (with LC output filter) 93 tWU Wake-up time 5 tSTBY Standby time 5 Output voltage noise f = 20Hz to 20kHz, RL=4Ω Unweighted (Filterless, G=6dB) A-weighted (Filterless, G=6dB) Unweighted (with LC output filter, G=6dB) A-weighted (with LC output filter, G=6dB) Unweighted (Filterless, G=12dB) A-weighted (Filterless, G=12dB) Unweighted (with LC output filter, G=12dB) A-weighted (with LC output filter, G=12dB) 72 50 68 49 93 65 85 64 Gain Zin VN dB 10 ms ms μVRMS 1. All electrical values are guaranteed with correlation measurements at 2.4V and 5V. 2. Standby mode is active when VSTBY is tied to GND. 3. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz. 4. Independent of Gain configuration (6 or 12dB) and between IN+ or IN- and GND. 8/29 TS2007 Table 7. Electrical characteristics VCC = +3.6V, GND = 0V, Vic=1.8V, Tamb = 25°C (unless otherwise specified)(1) Symbol ICC ICC-STBY Parameter Typ. Max. Unit Supply current No input signal, no load 2 2.8 mA Standby current (2) No input signal, VSTBY = GND 10 1000 nA 25 mV Voo Output offset voltage Floating inputs, RL = 8Ω Po Output power THD+N = 1% max, f = 1kHz, RL = 4Ω THD+N = 1% max, f = 1kHz, RL = 8Ω THD = 10% max, f = 1kHz, RL = 4Ω THD = 10% max, f = 1kHz, RL = 8Ω THD + N Total harmonic distortion + noise Po = 500mWRMS, G = 6dB, f = 1kHz, RL = 8Ω Efficiency Min. 1.1 0.65 1.4 0.85 W 0.3 % Efficiency Po = 1.1 WRMS, RL = 4Ω (with LC output filter) Po = 0.65 WRMS, RL = 8Ω (with LC output filter) 84 90 % PSRR Power supply rejection ratio with inputs grounded, Cin=1µF (3) f = 217Hz, RL = 8Ω, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8Ω, Gain=12dB, Vripple = 200mVpp 63 60 dB CMRR Common mode rejection ratio 20Hz < f < 20kHz 60 dB Gain value GS = 0V GS = VCC 11.5 5.5 12 6 12.5 6.5 dB Single input impedance (4) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal to noise ratio (A-weighting) Po=0.9W, RL=4Ω (with LC output filter) 92 tWU Wake-up time 5 tSTBY Standby time 5 Output voltage noise f = 20Hz to 20kHz, RL=4Ω Unweighted (Filterless, G=6dB) A-weighted (Filterless, G=6dB) Unweighted (with LC output filter, G=6dB) A-weighted (with LC output filter, G=6dB) Unweighted (Filterless, G=12dB) A-weighted (Filterless, G=12dB) Unweighted (with LC output filter, G=12dB) A-weighted (with LC output filter, G=12dB) 72 50 68 49 93 65 85 64 Gain Zin VN dB 10 ms ms μVRMS 1. All electrical values are guaranteed with correlation measurements at 2.4V and 5V. 2. Standby mode is active when VSTBY is tied to GND. 3. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz. 4. Independent of Gain configuration (6 or 12dB) and between IN+ or IN- and GND. 9/29 Electrical characteristics Table 8. VCC = +3.0V, GND = 0V, Vic=1.5V, Tamb = 25°C (unless otherwise specified)(1) Symbol ICC ICC-STBY TS2007 Parameter Typ. Max. Unit Supply current No input signal, no load 1.9 2.7 mA Standby current (2) No input signal, VSTBY = GND 10 1000 nA 25 mV Voo Output offset voltage Floating inputs, RL = 8Ω Po Output power THD+N = 1% Max, f = 1kHz, RL = 4Ω THD+N = 1% Max, f = 1kHz, RL = 8Ω THD = 10% Max, f = 1kHz, RL = 4Ω THD = 10% Max, f = 1kHz, RL = 8Ω THD + N Total harmonic distortion + noise Po = 400mWRMS, G = 6dB, f = 1kHz, RL = 8Ω Efficiency Min. 0.75 0.45 1 0.6 W 0.5 % Efficiency Po = 0.75 WRMS, RL = 4Ω (with LC output filter) Po = 0.45 WRMS, RL = 8Ω (with LC output filter) 83 90 % PSRR Power supply rejection ratio with inputs grounded, Cin=1µF (3) f = 217Hz, RL = 8Ω, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8Ω, Gain=12dB, Vripple = 200mVpp 63 60 dB CMRR Common mode rejection ratio 20Hz < f < 20kHz 60 dB Gain value GS = 0V GS = VCC 11.5 5.5 12 6 12.5 6.5 dB Single input impedance (4) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal to noise ratio (A-weighting) Po=0.6W, RL=4Ω (with LC output filter) 90 tWU Wake-up time 5 tSTBY Standby time 5 Output voltage noise f = 20Hz to 20kHz, RL=4Ω Unweighted (Filterless, G=6dB) A-weighted (Filterless, G=6dB) Unweighted (with LC output filter, G=6dB) A-weighted (with LC output filter, G=6dB) Unweighted (Filterless, G=12dB) A-weighted (Filterless, G=12dB) Unweighted (with LC output filter, G=12dB) A-weighted (with LC output filter, G=12dB) 71 50 67 49 92 65 85 64 Gain Zin VN dB 10 ms ms μVRMS 1. All electrical values are guaranteed with correlation measurements at 2.4V and 5V. 2. Standby mode is active when VSTBY is tied to GND. 3. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz. 4. Independent of Gain configuration (6 or 12dB) and between IN+ or IN- and GND. 10/29 TS2007 Table 9. Electrical characteristics VCC = +2.4V, GND = 0V, Vic=1.2V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY Parameter Typ. Max. Unit Supply current No input signal, no load 1.7 2.4 mA Standby current (1) No input signal, VSTBY = GND 10 1000 nA 25 mV Voo Output offset voltage Floating inputs, RL = 8Ω Po Output power THD+N = 1% Max, f = 1kHz, RL = 4Ω THD+N = 1% Max, f = 1kHz, RL = 8Ω THD = 10% Max, f = 1kHz, RL = 4Ω THD = 10% Max, f = 1kHz, RL = 8Ω THD + N Total harmonic distortion + noise Po = 200mWRMS, G = 6dB, f = 1kHz, RL = 8Ω Efficiency Min. 0.48 0.3 0.6 0.36 W 0.1 % Efficiency Po = 0.38 WRMS, RL = 4Ω (with LC output filter) Po = 0.25 WRMS, RL = 8Ω (with LC output filter) 82 90 % PSRR Power supply rejection ratio with inputs grounded, Cin=1µF (2) f = 217Hz, RL = 8Ω, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8Ω, Gain=12dB, Vripple = 200mVpp 63 60 dB CMRR Common mode rejection ratio 20Hz < f < 20kHz 60 dB Gain value GS = 0V GS = VCC 11.5 5.5 12 6 12.5 6.5 dB Single input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal to noise ratio (A-weighting) Po=0.4W, RL=4Ω (with LC output filter) 88 tWU Wake-up time 5 tSTBY Standby time 5 Output voltage noise f = 20Hz to 20kHz, RL=4Ω Unweighted (filterless, G=6dB) A-weighted (filterless, G=6dB) Unweighted (with LC output filter, G=6dB) A-weighted (with LC output filter, G=6dB) Unweighted (filterless, G=12dB) A-weighted (filterless, G=12dB) Unweighted (with LC output filter, G=12dB) A-weighted (with LC output filter, G=12dB) 70 50 66 49 91 65 84 64 Gain Zin VN dB 10 ms ms μVRMS 1. Standby mode is active when VSTBY is tied to GND. 2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ f = 217Hz. 3. Independent of Gain configuration (6 or 12dB) and between IN+ or IN- and GND. 11/29 Electrical characteristics 3.2 TS2007 Electrical characteristic curves The graphs shown in this section use the following abbreviations: ● RL+ 15μH or 30μH = pure resistor + very low series resistance inductor ● Filter = LC output filter (1μF+30μH for 4Ω and 0.5μF+60μH for 8Ω) All measurements are done with CS1=1μF and CS2=100nF (see Figure 2, except for the PSRR where CS1 is removed (see Figure 3). Figure 2. Test diagram for measurements Cs1 1 μF VCC Cs2 100nF GND GND RL 4 or 8 Ω Cin Out+ In+ 5th order 15 μH or 30 μH TS2007 In- 50kHz or LC Filter low-pass filter Out- Cin GND Audio Measurement Bandwith < 30kHz Figure 3. Test diagram for PSRR measurements VCC Cs2 100nF 20Hz to 20kHz Vripple GND 1 μF Cin Vcc GND RL 4 or 8 Ω Out+ In+ 15 μH or 30 μH TS2007 In- or 50kHz LC Filter low-pass filter Out- Cin 1 μF GND GND 5th order 50kHz low-pass filter 12/29 reference 5th order RMS Selective Measurement Bandwith =1% of Fmeas TS2007 Electrical characteristics Table 10. Index of graphics Description Figure Current consumption vs. power supply voltage Figure 4 Current consumption vs. standby voltage Figure 5 Efficiency vs. output power Figure 6 - Figure 9 Output power vs. power supply voltage Figure 10, Figure 11 PSRR vs. common mode input voltage Figure 12 PSRR vs. frequency CMRR vs. common mode input voltage Figure 13 - Figure 17 Figure 18 CMRR vs. frequency Figure 19 - Figure 23 Gain vs. frequency Figure 24, Figure 25 THD+N vs. output power Figure 26 - Figure 33 THD+N vs. frequency Figure 34 - Figure 45 Power derating curves Figure 46 Startup and shutdown time Figure 47 - Figure 49 13/29 Electrical characteristics Figure 4. TS2007 Current consumption vs. power supply voltage Figure 5. 3.0 Current consumption vs. standby voltage 2.5 No Loads 2.5 Current Consumption (mA) Current Consumption (mA) T AMB =25°C 2.0 1.5 1.0 0.5 0.0 2 3 4 2.0 V CC =5V 1.5 1.0 0.5 0.0 5 V CC=3.6V V CC =2.4V No Load T AMB=25°C 0 1 2 Power Supply Voltage (V) Figure 6. 3 4 5 Standby Voltage (V) Efficiency vs. output power Figure 7. 100 200 100 160 80 Efficiency vs. output power 500 80 Vcc=3V RL=4 Ω + ≥ 15 μ H F=1kHz THD+N ≤ 1% 0 0.0 Figure 8. 0.1 0.2 0.3 0.4 0.5 Output Power (W) 0.6 0.7 40 Efficiency vs. output power Efficiency (%) 0 0.0 14/29 50 100 40 80 30 60 Power Dissipation 20 Vcc=3V RL=8 Ω + ≥ 15 μ H F=1kHz THD+N ≤ 1% 20 0.1 0.2 0.3 Output Power (W) 0.4 Power Dissipation 0.5 Figure 9. Efficiency 40 200 0 0.0 0 0.8 100 80 40 20 10 0 0.5 Efficiency (%) 20 300 Vcc=5V RL=4Ω + ≥ 15μ H F=1kHz THD+N ≤ 1% 1.0 1.5 Output Power (W) 0 2.5 2.0 Efficiency vs. output power 125 100 Efficiency 75 60 Power Dissipation 40 50 Vcc=5V RL=8Ω + ≥ 15μ H F=1kHz THD+N ≤ 1% 20 0 0.0 100 Power Dissipation (mW) 40 60 0.2 0.4 0.6 0.8 Output Power (W) 1.0 1.2 25 0 1.4 Power Dissipation (mW) 120 Power Dissipation 400 Efficiency Efficiency (%) 60 Power Dissipation (mW) Efficiency (%) 80 Power Dissipation (mW) Efficiency TS2007 Electrical characteristics Figure 10. Output power vs. power supply voltage Figure 11. Output power vs. power supply voltage 3.5 2.0 2.0 THD+N=10% Output power (W) 3.0 RL = 8Ω + ≥ 15 μ H F = 1kHz BW < 30kHz Tamb = 25° C 1.6 Output power (W) 2.5 RL = 4Ω + ≥ 15μ H F = 1kHz BW < 30kHz Tamb = 25° C 1.5 1.0 THD+N=1% 1.2 THD+N=10% 0.8 THD+N=1% 0.4 0.5 0.0 2 3 4 5 Power Supply Voltage (V) 0.0 6 Figure 12. PSRR vs. common mode input voltage 3 6 0 Vripple = 200mVpp, F = 217Hz, G = 6dB RL ≥ 4Ω + ≥ 15 μ H, Tamb = 25° C -10 -30 -30 Vcc=2.4V PSRR (dB) -20 -40 Vcc=3.6, 4.2, 5V Vcc=3V Inputs grounded, Vripple = 200mVpp, V CC =5V, R L=4Ω +15μ H, C IN =1μ F, T AMB=25°C -10 -20 -50 Gain=12dB -40 Gain=6dB -50 -60 -60 -70 -70 -80 0.0 -80 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 20 5.0 100 Common Mode Input Voltage (V) 1k 10k 20k 10k 20k Frequency (Hz) Figure 14. PSRR vs. frequency Figure 15. PSRR vs. frequency 0 0 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=4Ω +15μ H, C IN =1μ F, T AMB =25°C -10 -20 -20 -30 -30 -40 Vcc=2.4, 3, 3.6, 4.2, 5V -50 -40 -60 -70 -70 20 100 1k Frequency (Hz) 10k 20k Vcc=2.4, 3, 3.6, 4.2, 5V -50 -60 -80 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=4Ω +30 μ H, C IN =1μ F, TAMB =25°C -10 PSRR (dB) PSRR (dB) 4 5 Power Supply Voltage (V) Figure 13. PSRR vs. frequency 0 PSRR(dB) 2 -80 20 100 1k Frequency (Hz) 15/29 Electrical characteristics TS2007 Figure 16. PSRR vs. frequency Figure 17. PSRR vs. frequency 0 0 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=8Ω +15μ H, C IN =1μ F, T AMB =25°C -20 -20 -30 -30 -40 Vcc=2.4, 3, 3.6, 4.2, 5V -50 -40 -60 -70 -70 100 20 1k 10k Vcc=2.4, 3, 3.6, 4.2, 5V -50 -60 -80 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=8Ω +30 μ H, C IN =1μ F, TAMB =25°C -10 PSRR (dB) PSRR (dB) -10 -80 20k 20 100 Frequency (Hz) Figure 18. CMRR vs. common mode input voltage 10k 20k 10k 20k Δ Vicm=200mVpp, V CC =5V -10 R L=4Ω +15μ H, C IN=1 μ F, TAMB =25°C -20 CMRR (dB) -20 PSRR(dB) 20k 0 Δ Vicm=200mVpp, F = 217Hz, G=6dB RL ≥ 4Ω + ≥ 15 μ H, T AMB =25°C -10 -30 -40 Vcc=2.4V Vcc=3.6, 4.2, 5V Vcc=3V -50 -30 -40 Gain=12dB -50 -60 -60 -70 -70 -80 0.0 -80 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Gain=6dB 20 5.0 100 Common Mode Input Voltage (V) 1k Frequency (Hz) Figure 20. CMRR vs. frequency Figure 21. CMRR vs. frequency 0 0 Δ Vicm=200mVpp, G=6dB R L= 4Ω +15μ H, C IN =1μ F, T AMB =25°C -10 Δ Vicm=200mVpp, G=6dB R L= 4Ω +30μ H, C IN=1 μ F, TAMB =25°C -10 -20 CMRR (dB) -20 CMRR (dB) 10k Figure 19. CMRR vs. frequency 0 -30 Vcc=2.4, 3, 3.6, 4.2, 5V -40 -50 -30 -50 -60 -70 -70 -80 20 100 1k Frequency (Hz) 10k 20k Vcc=2.4, 3, 3.6, 4.2, 5V -40 -60 16/29 1k Frequency (Hz) -80 20 100 1k Frequency (Hz) TS2007 Electrical characteristics Figure 22. CMRR vs. frequency Figure 23. CMRR vs. frequency 0 0 Δ Vicm=200mVpp, G=6dB R L= 8Ω +15μ H, C IN =1μ F, T AMB =25°C -10 -20 CMRR (dB) -20 CMRR (dB) Δ Vicm=200mVpp, G=6dB R L= 8Ω +30μ H, C IN=1 μ F, TAMB =25°C -10 -30 Vcc=2.4, 3, 3.6, 4.2, 5V -40 -50 -30 -50 -60 -60 -70 -70 -80 20 100 1k 10k Vcc=2.4, 3, 3.6, 4.2, 5V -40 -80 20k 20 100 1k Frequency (Hz) Figure 24. Gain vs. frequency 14 no load no load 12 4 PSRR (dB) PSRR (dB) 6 RL=8Ω +15μ H 10 RL=8Ω +15μ H RL=8Ω +30μ H RL=8Ω +30μ H 2 Gain = 6dB Vin = 500 mVpp T AMB = 25° C 20 100 8 RL=4Ω +15μ H 6 1k Frequency (Hz) 10k 20k 20 RL=4Ω +30μ H 100 1k 10k 20k Frequency (Hz) Figure 27. THD+N vs. output power 10 10 RL = 4Ω + 15μ H F = 1kHz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V THD + N (%) 1 RL=4Ω +15μ H Gain = 12dB Vin = 500 mVpp T AMB = 25° C RL=4Ω +30μ H Figure 26. THD+N vs. output power THD + N (%) 20k Figure 25. Gain vs. frequency 8 0 10k Frequency (Hz) Vcc=2.4V 0.1 1E-3 1 RL = 4Ω + 30μ H F = 1kHz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V Vcc=2.4V 0.1 0.01 0.1 Output Power (W) 1 3 1E-3 0.01 0.1 Output Power (W) 1 3 17/29 Electrical characteristics TS2007 Figure 28. THD+N vs. output power Figure 29. THD+N vs. output power 1 10 RL = 8 Ω + 15μ H F = 1kHz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V Vcc=2.4V THD + N (%) THD + N (%) 10 0.1 0.01 0.1 Output Power (W) 1 2 Figure 30. THD+N vs. output power 1E-3 Vcc=5V Vcc=3.6V Vcc=2.4V THD + N (%) THD + N (%) 0.01 0.1 Output Power (W) 1 2 1 RL = 4Ω + 30μ H F = 100Hz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V Vcc=2.4V 0.1 0.01 1E-3 0.01 0.1 Output Power (W) 1 3 Figure 32. THD+N vs. output power 0.01 1E-3 0.01 0.1 Output Power (W) 1 3 Figure 33. THD+N vs. output power 10 10 RL = 8Ω + 15μ H F = 100Hz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V Vcc=2.4V THD + N (%) THD + N (%) Vcc=2.4V 10 RL = 4Ω + 15μ H F = 100Hz G = 6dB BW < 30kHz Tamb = 25° C 0.1 0.1 0.01 1E-3 18/29 Vcc=3.6V Figure 31. THD+N vs. output power 10 1 Vcc=5V 0.1 1E-3 1 1 RL = 8Ω + 30μ H F = 1kHz G = 6dB BW < 30kHz Tamb = 25° C 1 RL = 8Ω + 30μ H F = 100Hz G = 6dB BW < 30kHz Tamb = 25° C Vcc=5V Vcc=3.6V Vcc=2.4V 0.1 0.01 0.1 Output Power (W) 1 2 0.01 1E-3 0.01 0.1 Output Power (W) 1 2 TS2007 Electrical characteristics Figure 34. THD+N vs. frequency Figure 35. THD+N vs. frequency 10 RL=4Ω + 30μ H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25° C Po=0.4W 1 THD + N (%) THD + N (%) 1 10 RL=4Ω + 15μ H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25° C 0.1 Po=0.4W 0.1 Po=0.2W Po=0.2W 0.01 20 100 1000 Frequency (Hz) 10000 20k Figure 36. THD+N vs. frequency 0.01 RL=8Ω + 30 μ H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25° C Po=0.2W 1 0.1 Po=0.2W 0.1 Po=0.1W 0.01 20 100 1000 Frequency (Hz) Po=0.1W 10000 20k Figure 38. THD+N vs. frequency 0.01 100 1000 Frequency (Hz) 10000 20k 10 RL=4Ω + 15μ H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25° C RL=4Ω + 30μ H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25° C Po=0.9W 1 THD + N (%) THD + N (%) 20 Figure 39. THD+N vs. frequency 10 1 10000 20k 1000 Frequency (Hz) 10 RL=8Ω + 15μ H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25° C THD + N (%) THD + N (%) 100 Figure 37. THD+N vs. frequency 10 1 20 0.1 Po=0.9W 0.1 Po=0.45W Po=0.45W 0.01 20 100 1000 Frequency (Hz) 10000 20k 0.01 20 100 1000 Frequency (Hz) 10000 20k 19/29 Electrical characteristics TS2007 Figure 40. THD+N vs. frequency Figure 41. THD+N vs. frequency 10 10 RL=8Ω + 30μ H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25° C Po=0.5W 1 THD + N (%) THD + N (%) 1 RL=8Ω + 15μ H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25° C 0.1 Po=0.5W 0.1 Po=0.25W 0.01 20 100 1000 Frequency (Hz) 10000 20k Figure 42. THD+N vs. frequency Po=0.25W 0.01 Po=1.5W 1 0.1 RL=4Ω + 30μ H G=6dB Bw < 30kHz Vcc=5V Tamb = 25° C 20 100 1000 Frequency (Hz) 10000 20k 0.01 100 RL=8Ω + 30μ H G=6dB Bw < 30kHz Vcc=5V Tamb = 25° C Po=0.9W 1 0.1 10000 20k 20 100 1000 Frequency (Hz) Po=0.9W 0.1 Po=0.45W 20/29 1000 Frequency (Hz) 10 RL=8Ω + 15μ H G=6dB Bw < 30kHz Vcc=5V Tamb = 25° C THD + N (%) THD + N (%) 20 Figure 45. THD+N vs. frequency 10 0.01 Po=1.5W Po=0.75W Figure 44. THD+N vs. frequency 1 10000 20k 0.1 Po=0.75W 0.01 1000 Frequency (Hz) 10 RL=4Ω + 15μ H G=6dB Bw < 30kHz Vcc=5V Tamb = 25° C THD + N (%) THD + N (%) 100 Figure 43. THD+N vs. frequency 10 1 20 Po=0.45W 10000 20k 0.01 20 100 1000 Frequency (Hz) 10000 20k TS2007 Electrical characteristics Figure 46. Power derating curves Figure 47. Startup and shutdown phase VCC=5V, G=6dB, Cin=1μF, inputs grounded DFN8 Package Power Dissipation (W) 3.5 3.0 Mounted on a 4-layer PCB 2.5 No Heat sink 2.0 1.5 1.0 0.5 0.0 0 25 50 75 100 125 150 Ambiant Temperature (° C) Figure 48. Startup and shutdown phase Figure 49. Startup and shutdown phase VCC=5V, G=6dB, Cin=1μF, Vin=1Vpp, VCC=5V, G=12dB, Cin=1μF, Vin=1Vpp, F=10kHz F=10kHz 21/29 Application information TS2007 4 Application information 4.1 Differential configuration principle The TS2007 is a monolithic fully-differential input/output class D power amplifier. The TS2007 also includes a common-mode feedback loop that controls the output bias value to average it at VCC/2 for any DC common mode input voltage. This allows the device to always have a maximum output voltage swing, and by consequence, maximize the output power. Moreover, as the load is connected differentially compared to a single-ended topology, the output is four times higher for the same power supply voltage. The advantages of a full-differential amplifier are: 4.2 ● High PSRR (power supply rejection ratio) ● High common mode noise rejection ● Virtually zero pop without additional circuitry, giving a faster start-up time compared to conventional single-ended input amplifiers ● Easier interfacing with differential output audio DAC ● No input coupling capacitors required thanks to common mode feedback loop Gain settings In the flat region of the frequency-response curve (no input coupling capacitor or internal feedback loop + load effect), the differential gain can be set to either 6 or 12 dB depending on the logic level of the GS pin: GS Gain (dB) Gain (V/V) 1 6dB 2 0 12dB 4 Note: Between the GS pin and VCC there is an internal 300kΩ resistor. When the pin is floating the gain is 6 dB. 4.3 Common mode feedback loop limitations As explained previously, the common mode feedback loop allows the output DC bias voltage to be averaged at VCC/2 for any DC common mode bias input voltage. Due to the Vic limitation of the input stage (see Table 2: Operating conditions on page 3), the common mode feedback loop can fulfil its role only within the defined range. 4.4 Low frequency response If a low frequency bandwidth limitation is required, it is possible to use input coupling capacitors. In the low frequency region, the input coupling capacitor Cin starts to have an effect. Cin forms, with the input impedance Zin, a first order high-pass filter with a -3dB cutoff frequency (see Table 5 to Table 9). 22/29 TS2007 Application information 1 F CL = ------------------------------------------2 ⋅ π ⋅ Z in ⋅ C in So, for a desired cut-off frequency FCL we can calculate Cin: 1 C in = --------------------------------------------2 ⋅ π ⋅ Z in ⋅ F CL with FCL in Hz, Zin in Ω and Cin in F. The input impedance Zin is for the whole power supply voltage range, typically 75kΩ . There is also a tolerance around the typical value (see Table 5 to Table 9). With regard to the tolerance, you can also calculate tolerance of the FCL: 4.5 ● F CLmax = 1.103 ⋅ F CL ● F CLmin = 0.915 ⋅ F CL Decoupling of the circuit A power supply capacitor, referred to as CS, is needed to correctly bypass the TS2007. The TS2007 has a typical switching frequency of 280kHz and output fall and rise time about 5ns. Due to these very fast transients, careful decoupling is mandatory. A 1µF ceramic capacitor is enough, but it must be located very close to the TS2007 in order to avoid any extra parasitic inductance created by a long track wire. Parasitic loop inductance, in relation with di/dt, introduces overvoltage that decreases the global efficiency of the device and may cause, if this parasitic inductance is too high, a TS2007 breakdown. In addition, even if a ceramic capacitor has an adequate high frequency ESR value, its current capability is also important. A 0603 size is a good compromise, particularly when a 4Ω load is used. Another important parameter is the rated voltage of the capacitor. A 1µF/6.3V capacitor used at 5V, loses about 50% of its value. With a power supply voltage of 5V, the decoupling value, instead of 1µF, could be reduced to 0.5µF. As CS has particular influence on the THD+N in the medium to high frequency region, this capacitor variation becomes decisive. In addition, less decoupling means higher overshoots which can be problematic if they reach the power supply AMR value (6V). 4.6 Wake-up time (twu) When the standby is released to set the device ON, there is a wait of 5ms typically. The TS2007 has an internal digital delay that mutes the outputs and releases them after this time in order to avoid any pop noise. Note: The gain increases smoothly (see Figure 49) from the mute to the gain selected by the GS pin (Section 4.2). 23/29 Application information 4.7 TS2007 Shutdown time When the standby command is set, the time required to put the two output stages into high impedance and to put the internal circuitry in shutdown mode, is typically 5ms. This time is used to decrease the gain and avoid any pop noise during shutdown. Note: The gain decreases smoothly until the outputs are muted (see Figure 49). 4.8 Consumption in shutdown mode Between the shutdown pin and GND there is an internal 300kΩ resistor. This resistor forces the TS2007 to be in shutdown when the shutdown input is left floating. However, this resistor also introduces additional shutdown power consumption if the shutdown pin voltage is not 0V. Referring to Table 2: Operating conditions on page 3, with a 0.4V shutdown voltage pin for example, you must add 0.4V/300k=1.3µA in typical (0.4V/273k=1.46µA in maximum) to the shutdown current specified in Table 5 to Table 9. 4.9 Single-ended input configuration It is possible to use the TS2007 in a single-ended input configuration. However, input coupling capacitors are needed in this configuration. The following schematic diagram shows a typical single-ended input application. Figure 50. Typical application for single-ended input configuration VCC Cs 1uF Input 6 2 Gain Select Control GS Cin 4 INGain Select 3 IN+ Vcc OUT+ + PWM 1 Standby 24/29 Oscillator Gnd 7 Standby Control H Bridge 8 5 OUT- Cin Standby Control TS2007 Speaker TS2007 4.10 Application information Output filter considerations The TS2007 is designed to operate without an output filter. However, due to very sharp transients on the TS2007 output, EMI radiated emissions may cause some standard compliance issues. These EMI standard compliance issues can appear if the distance between the TS2007 outputs and loudspeaker terminal are long (typically more than 50mm, or 100mm in both directions, to the speaker terminals). As the PCB layout and internal equipment device are different for each configuration, it is difficult to provide a one-size-fits-all solution. However, to decrease the probability of EMI issues, there are several simple rules to follow: ● Reduce, as much as possible, the distance between the TS2007 output pins and the speaker terminals. ● Use a ground plane for “shielding” sensitive wires. ● Place, as close as possible to the TS2007 and in series with each output, a ferrite bead with a rated current of minimum 2.5A and impedance greater than 50Ω at frequencies above 30MHz. If, after testing, these ferrite beads are not necessary, replace them by a short-circuit. ● Allow extra footprint to place, if necessary, a capacitor to short perturbations to ground (see Figure 51). Figure 51. Ferrite chip bead placement From TS2007 output Ferrite chip bead to speaker about 100pF gnd In the case where the distance between the TS2007 output and the speaker terminals is too long, it is possible to have low frequency EMI issues due to the fact that the typical operating frequency is 280kHz. In this configuration, it is necessary to use the output filter represented in Figure 1 on page 4 as close as possible to the TS2007. 25/29 Package information 5 TS2007 Package information In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK® packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Figure 52. Pinout (top view) 1 8 2 7 3 6 4 5 Figure 53. Marking (top view) Logo: ST Part number: K007 Three digit date code: YWW The dot is for marking pin 1 Figure 54. Recommended footprint for the TS2007 DFN8 package 1.8 mm 0.8 mm 0.35 mm 2.2 mm 0.65 mm 1.4 mm 26/29 TS2007 Package information Figure 55. DFN8 package mechanical data Dimensions Ref A Millimeters Mils Min Typ Max Min Typ Max 0.50 0.60 0.65 19.6 23.6 25.6 0.02 0.05 0.8 1.9 A1 A3 0.22 8.6 b 0.25 0.30 0.35 9.8 11.8 13.8 D 2.85 3.00 3.15 112.2 118.1 124 D2 1.60 1.70 1.80 63 66.9 70.8 E 2.85 3.00 3.15 112.2 118.1 124 E2 1.10 1.20 1.30 43.3 47.2 51.2 e (1) L 0.65 0.50 25.5 0.55 0.60 21.6 0.08 23.6 3.1 C ddd 19.6 ddd SEATING PLANE A A3 A1 C D e 2 3 4 8 7 6 5 E E2 1 b D2 1. The dimension of L is not compliant with JEDEC MO-248 which recommends 0.40mm +/-0.10mm. Note: The DFN8 package has an exposed pad E2 x D2. For enhanced thermal performance, the exposed pad must be soldered to a copper area on the PCB, acting as a heatsink. This copper area can be electrically connected to pin7 or left floating. 27/29 Ordering information 6 Ordering information Table 11. 7 28/29 TS2007 Order code Part number Temperature range Package Marking TS2007IQT -40°C, +85°C DFN8 K07 Revision history Date Revision Changes 11-Jan-2007 1 Initial release (preliminary data). 11-May-2007 2 First complete datasheet. This release of the datasheet includes electrical characteristics curves and application information. 24-May-2007 3 Corrected error in Table 4: Pin descriptions: descriptions of pin 5 and pin 8 were inverted. TS2007 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. 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Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2007 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 29/29