TS2007FC 3 W filter-free class D audio power amplifier with 6 or 12 dB fixed gain select Features ■ Operates from VCC=2.4 V to 5.5 V ■ Standby mode active low ■ Output power: 1.4 W at 5 V or 0.5 W at 3.0 V into 8 Ω with 1% THD+N max. ■ Output power: 2.3 W at 5V or 0.75 W at 3.0 V into 4 Ω with 1% THD+N max. ■ Two fixed gain selects: 6 dB or 12 dB ■ Low current consumption ■ Efficiency: 86% typical ■ Signal-to-noise ratio: 90 dB typical ■ PSRR: 68 dB typical at 217 Hz with 6 dB gain ■ PWM base frequency: 280 kHz ■ Low pop and click noise ■ Thermal shutdown protection ■ Output short-circuit protection ■ Flip-chip lead-free 9-bump package with back coating in option. TS2007EIJT - 9-bump flip-chip Pinout (top view) OUT- GND OUT+ GS VCC STBY IN+ VCC IN- Applications ■ Cellular phone ■ PDA ■ Notebook PC Description The TS2007FC is a class D power audio amplifier. Able to drive up to 1.4 W into an 8 Ω load at 5 V, it achieves better efficiency than typical class AB audio power amplifiers. A standby mode function (active low) keeps the current consumption down to 1 μA typical. The TS2007FC is available in a 9-bump flip-chip lead-free package. This device can switch between two gain settings, 6 dB or 12 dB via a logic signal on the gain select pin. Pop and click reduction circuitry provides low on/off switch noise and allows the device to start within 1 ms typically. August 2008 Rev 1 1/28 www.st.com 28 Contents TS2007FC Contents 1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 2 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 3.1 Electrical characteristics tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3.2 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.2 Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.3 Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.4 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.5 Circuit decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.6 Wake-up time (twu) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.7 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.8 Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.9 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.10 Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.11 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.12 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 2/28 TS2007FC 1 Absolute maximum ratings and operating conditions Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings (AMR) Symbol VCC Vin Parameter Supply voltage (1) Input voltage (2) Value Unit 6 V GND to VCC V 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 Human body model (5) ESD Machine model Latch-up (6) Latch-up immunity Lead temperature (soldering, 10 sec) °C/W (4) 2 kV 200 V Class A = 200 mA 260 °C Output short circuit protection (7) 1. All voltage values are measured with respect to the ground pin. 2. The magnitude of input signal must never exceed VCC + 0.3 V / GND - 0.3 V 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 provokes abnormal operating conditions. 5. Human body model: 100 pF discharged through a 1.5 kΩ resistor between two pins of the device, done for all couples of pin combinations with other pins floating. 6. Machine model: a 200 pF cap is charged to the specified voltage, then discharged directly between two pins of the device with no external series resistor (internal resistor < 5 Ω), done for all couples of pin combinations with other pins floating. 7. Implemented short-circuit protection protects the amplifier against damage by short-circuit between positive and negative outputs and between outputs and ground. 3/28 Absolute maximum ratings and operating conditions Table 2. Operating conditions Symbol Parameter VCC Supply voltage Vin Input voltage range Vicm VSTBY VGS RL Rthja TS2007FC Input common mode voltage range (1) Standby voltage input: (2) Device ON Device OFF Gain select input voltage: (4) Gain = 6 dB Gain = 12 dB Unit 2.4 to 5.5 V GND to VCC V GND + 0.15 V to VCC - 0.7 V V 1.4 ≤ VSTBY ≤ VCC GND ≤VSTBY ≤0.4 (3) V 1.4 ≤ VGS ≤ VCC GND ≤VGS ≤0.4 V ≥ Load resistor Thermal resistance junction to ambient Value (5) 4 90 Ω °C/W 1. |Voo| ≤35 mV max with both differential gains. 2. Without any signal on VSTBY, the device is in standby (internal 300 kΩ pull down resistor). 3. Minimum current consumption is obtained when VSTBY = GND. 4. Without any signal on GS pin, the device is in a 6 dB gain configuration (internal 300 kΩ pull up resistor). 5. With mounted on 4-layer PCB. 4/28 TS2007FC 2 Application information Application information Table 3. External component description Components 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. These capacitors also form a high pass filter with Zin (Fc = 1 / (2 x π x Zin x Cin)). See Table 4. Pin description Pin name Pin description IN+ Positive differential input VCC Power supply IN- Negative differential input GS Gain select input STDBY Standby pin (active low) GND Ground OUT+ Positive differential output OUT- Negative differential output Figure 1. Typical application VCC Cs Gain select control A2 Input capacitors are optional In- GS Cin C1 Differential Input B2 1uF INGain Select A1 IN+ TS2007 Vcc Speaker OUT+ PWM + H Bridge C3 A3 OUT- Cin Standby Control C2 Standby Oscillator Protection Circuit Gnd B3 In+ Standby control Note: See Section 4.10: Output filter considerations on page 23. 5/28 Electrical characteristics TS2007FC 3 Electrical characteristics 3.1 Electrical characteristics tables Table 5. VCC = +5 V, GND = 0 V, Vic = 2.5 V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY Parameter Min. Supply current. No input signal, no load Standby current (1). No input signal, VSTBY = GND. Voo Output offset voltage. Floating inputs, RL = 8 Ω Po Output power THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, RL = 8 Ω THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω THD + N Total harmonic distortion + noise Po = 900 mWRMS, G = 6 dB, F= 1 kHz, RL = 8 Ω Efficiency Typ. Max. Unit 2.5 4 mA 1 2 µA 25 mV 2.3 1.4 3 1.75 W 0.12 % Efficiency Po = 2.3 Wrms, RL = 4 Ω (with LC output filter) Po = 1.4 Wrms, RL = 8 Ω (with LC output filter) 86 92 % PSRR Power supply rejection ratio with inputs grounded, CIN = 1 µF (2) F= 217 Hz, RL = 8 Ω, Gain = 6 dB, Vripple = 200 mVpp F= 217 Hz, RL = 8 Ω, Gain = 12 dB, Vripple = 200 mVpp 68 65 dB CMRR Common mode rejection ratio Cin=1 µF, RL = 8 Ω 20 Hz < F< 20 kHz, Gain = 6 dB, ΔVICM = 200 mVpp 60 dB 11.5 5.5 12 6 12.5 6.5 dB Single ended input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal-to-noise ratio (A-weighting), F = 1 kHz, Po = 1.9 W G = 6 dB, RL = 4 Ω (with LC output filter) 93 tWU Wake-up time 1 tSTBY Standby time 1 Gain Zin VN Gain value, Gs = 0 V Gain value, GS = VCC Output voltage noise, F = 20 Hz to 20 kHz, RL = 4 Ω Unweighted (filterless, G = 6 dB) A-weighted (filterless, G = 6 dB) Unweighted (with LC output filter, G = 6 dB) A-weighted (with LC output filter, G = 6 dB) Unweighted (filterless, G = 12 dB) A-weighted (filterless, G = 12 dB) Unweighted (with LC output filter, G = 12 dB) A-weighted (with LC output filter, G = 12 dB) dB 3 87 60 83 58 106 77 101 75 1. Standby mode is active when VSTBY is tied to GND. 2. Dynamic measurement - 20*log(rms(Vout)/rms(Vripple)). Vripple is the superimposed sinus signal to VCC @ F =217 Hz. 3. Independent of gain configuration (6 or 12 dB) and between IN+ or IN- and GND. 6/28 ms ms µVrms TS2007FC Table 6. Electrical characteristics VCC = +4.2 V, GND = 0 V, Vic = 2.1 V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY Parameter Min. Supply current No input signal, no load Standby current (1) No input signal, VSTBY = GND Voo Output offset voltage Floating inputs, RL = 8 Ω Po Output power THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, RL = 8 Ω THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω THD + N Total harmonic distortion + noise Po = 600 mWrms, G = 6 dB, F = 1 kHz, RL = 8 Ω Efficiency Typ. Max. Unit 2 3.3 mA 0.85 2 µA 25 mV 1.6 0.95 2 1.2 W 0.09 % Efficiency Po = 1.6 Wrms, RL = 4 Ω (with LC output filter) Po = 0.95 Wrms, RL = 8 Ω (with LC output filter) 86 92 % PSRR Power supply rejection ratio with inputs grounded, Cin = 1 µF (2) F = 217 Hz, RL = 8 Ω, Gain = 6 dB, Vripple = 200 mVpp F = 217 Hz, RL = 8 Ω, Gain = 12 dB, Vripple = 200 mVpp 68 65 CMRR Common mode rejection ratio Cin = 1 µF, RL = 8 Ω, 20 Hz < F< 20 kHz, Gain = 6 dB, ΔVICM = 200 mVpp Gain Gain value Gs = 0 V GS = VCC dB 60 dB 11.5 5.5 12 6 12.5 6.5 dB Single ended input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 1.3 W G = 6 dB, RL = 4 Ω (with LC output filter) 92 tWU Wake-up time 1 tSTBY Standby time 1 ZIN VN Output voltage noise, F = 20 Hz to 20 kHz, RL = 4 Ω Unweighted (filterless, G = 6 dB) A-weighted (filterless, G = 6 dB) Unweighted (with LC output filter, G = 6 dB) A-weighted (with LC output filter, G = 6 dB) Unweighted (filterless, G = 12 dB) A-weighted (filterless, G = 12 dB) Unweighted (with LC output filter, G = 12 dB) A-weighted (with LC output filter, G = 12 dB) 86 59 82 57 105 74 100 74 dB 3 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 = 217 Hz. 3. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND. 7/28 Electrical characteristics Table 7. VCC = +3.6 V, GND = 0 V, Vic = 1.8 V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY TS2007FC Parameter Typ. Max. Unit Supply current No input signal, no load 1.7 3.1 mA Standby current (1) No input signal, VSTBY = GND 0.75 2 µA 25 mV Voo Output offset voltage Floating inputs, RL = 8 Ω Po Output power THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, RL = 8 Ω THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω THD + N Total harmonic distortion + noise Po = 400 mWrms, G = 6 dB, F = 1 kHz, RL = 8 Ω Efficiency Min. 1.2 0.7 1.55 0.9 W 0.06 % Efficiency Po = 1.18 Wrms, RL = 4 Ω (with LC output filter) Po = 0.7 Wrms, RL = 8 Ω (with LC output filter) 86 92 % PSRR Power supply rejection ratio with inputs grounded, Cin = 1 µF (2) F = 217 Hz, RL = 8 Ω, Gain = 6 dB, Vripple = 200 mVpp F = 217 Hz, RL = 8 Ω, Gain = 12 dB, Vripple = 200 mVpp 68 65 CMRR Common mode rejection ratio Cin = 1 µF, RL = 8 Ω, 20 Hz < F< 20 kHz, Gain = 6 dB, ΔVICM = 200 mVpp Gain Gain value Gs = 0 V GS = VCC dB 60 dB 11.5 5.5 12 6 12.5 6.5 dB Single ended input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 0.9 W G = 6 dB, RL = 4 Ω (with LC output filter) 90 tWU Wake-up time 1 tSTBY Standby time 1 Zin VN Output voltage noise, F = 20 Hz to 20 kHz, RL = 4 Ω Unweighted (filterless, G = 6 dB) A-weighted (filterless, G = 6 dB) Unweighted (with LC output filter, G = 6 dB) A-weighted (with LC output filter, G = 6 dB) Unweighted (filterless, G = 12 dB) A-weighted (filterless, G = 12 dB) Unweighted (with LC output filter, G = 12 dB) A-weighted (with LC output filter, G = 12 dB) 84 58 79 56 104 75 99 72 dB 3 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= 217 Hz. 3. Independent of gain configuration (6 or 12 dB) and between IN+ or IN- and GND. 8/28 TS2007FC Table 8. Electrical characteristics VCC = +3.0 V, GND = 0 V, Vic = 1.5 V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY Parameter Typ. Max. Unit Supply current No input signal, no load 1.5 2.9 mA Standby current (1) No input signal, VSTBY = GND 0.6 2 µA 25 mV Voo Output offset voltage Floating inputs, RL = 8 Ω Po Output power THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, RL = 8 Ω THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω THD + N Total harmonic distortion + noise Po = 300 mWRMS, G = 6 dB, F= 1 kHz, RL = 8 Ω Efficiency Min. 0.75 0.5 1 0.6 W 0.04 % Efficiency Po = 0.8 Wrms, RL = 4 Ω (with LC output filter) Po = 0.5 Wrms, RL = 8 Ω (with LC output filter) 85 91 % PSRR Power supply rejection ratio with inputs grounded, Cin = 1 µF (2) F = 217 Hz, RL = 8 Ω, Gain = 6 dB, Vripple = 200 mVpp F = 217 Hz, RL = 8 Ω, Gain = 12 dB, Vripple = 200 mVpp 68 65 CMRR Common mode rejection ratio Cin = 1 µF, RL = 8 Ω, 20 Hz < F< 20 kHz, Gain = 6 dB, ΔVICM = 200 mVpp Gain Gain value Gs = 0 V GS = VCC dB 60 dB 11.5 5.5 12 6 12.5 6.5 dB Single ended input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 0.6 W G = 6 dB, RL = 4 Ω (with LC output filter) 89 tWU Wake-up time 1 tSTBY Standby time 1 Zin VN Output voltage noise, F = 20 Hz to 20 kHz, RL = 4 Ω Unweighted (filterless, G = 6 dB) A-weighted (filterless, G = 6 dB) Unweighted (with LC output filter, G = 6 dB) A-weighted (with LC output filter, G = 6 dB) Unweighted (filterless, G = 12 dB) A-weighted (filterless, G = 12 dB) Unweighted (with LC output filter, G = 12 dB) A-weighted (with LC output filter, G = 12 dB) 82 57 78 55 103 74 99 71 dB 3 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 = 217 Hz. 3. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND. 9/28 Electrical characteristics Table 9. VCC = +2.7 V, GND = 0 V, Vic = 1.35 V, Tamb = 25°C (unless otherwise specified) Symbol ICC ICC-STBY TS2007FC Parameter Typ. Max. Unit Supply current No input signal, no load 1.45 2.5 mA Standby current (1) No input signal, VSTBY = GND 0.5 2 µA 25 mV Voo Output offset voltage Floating inputs, RL = 8 Ω Po Output power THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, RL = 8 Ω THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω THD + N Total harmonic distortion + noise Po = 250 mWrms, G = 6 dB, F = 1 kHz, RL = 8 Ω Efficiency Min. 0.64 0.39 0.83 0.49 W 0.03 % Efficiency Po = 0.64 Wrms, RL = 4 Ω (with LC output filter) Po = 0.39 Wrms, RL = 8 Ω (with LC output filter) 84 91 % PSRR Power supply rejection ratio with inputs grounded, Cin = 1 µF (2) F= 217 Hz, RL = 8 Ω, Gain = 6 dB, Vripple = 200 mVpp F= 217 Hz, RL = 8 Ω, Gain = 12 dB, Vripple = 200 mVpp 68 65 CMRR Common mode rejection ratio Cin = 1 µF, RL = 8 Ω, 20 Hz < F< 20 kHz, Gain = 6 dB, ΔVICM = 200 mVpp Gain Gain value Gs = 0 V GS = VCC dB 60 dB 11.5 5.5 12 6 12.5 6.5 dB Single ended input impedance (3) 68 75 82 kΩ FPWM Pulse width modulator base frequency 190 280 370 kHz SNR Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 0.5 W G = 6 dB, RL = 4 Ω (with LC output filter) 88 tWU Wake-up time 1 tSTBY Standby time 1 Zin VN Output voltage noise, F = 20 Hz to 20 kHz, RL = 4 Ω Unweighted (filterless, G = 6 dB) A-weighted (filterless, G = 6 dB) Unweighted (with LC output filter, G = 6 dB) A-weighted (with LC output filter, G = 6 dB) Unweighted (filterless, G = 12 dB) A-weighted (filterless, G = 12 dB) Unweighted (with LC output filter, G = 12 dB) A-weighted (with LC output filter, G = 12 dB) 82 56 77 55 100 73 98 70 dB 3 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= 217 Hz. 3. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND. 10/28 TS2007FC 3.2 Electrical characteristics Electrical characteristic curves The graphs shown in this section use the following abbreviations: ● RL+ 15 µH or 30 µH = pure resistor + very low series resistance inductor ● Filter = LC output filter (1 µF+ 30 µH for 4 Ω and 0.5 µF+15 µH for 8 Ω) All measurements are done with CS1 = 1 µF and CS2 = 100 nF (Figure 2), except for the PSRR where CS1 is removed (Figure 3). Figure 2. Test diagram for measurements Cs1 1 μF VCC GND Cs2 100nF GND RL 4 or 8 Ω Cin Out+ In+ 5th order 15 μH or 30 μH TS2007 In- or 50kHz 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- 5th order or 50kHz LC Filter low-pass filter Out- Cin 1 μF GND GND 5th order 50kHz low-pass filter reference RMS Selective Measurement Bandwith =1% of Fmeas 11/28 Electrical characteristics TS2007FC For quick reference, a list of the graphs shown in this section is provided in Table 10. Table 10. Index of graphs Description 12/28 Figure Current consumption vs. power supply voltage Figure 4 Standby current vs. power supply voltage Figure 5 Current consumption vs. standby voltage Figure 6 Efficiency vs. output power Figure 7 to Figure 12 Output power vs. power supply voltage Figure 13, Figure 14 THD+N vs. output power Figure 15 to Figure 18 THD+N vs. frequency Figure 19 to Figure 28 PSRR vs. frequency Figure 29 PSRR vs. common mode input voltage Figure 30, Figure 31 CMRR vs. frequency Figure 32 CMRR vs. common mode input voltage Figure 33, Figure 34 Gain vs. frequency Figure 35, Figure 36 Output offset vs. common mode input voltage Figure 37 to Figure 39 Power derating curves Figure 40 Startup and shutdown phase Figure 41 to Figure 43 TS2007FC Figure 4. 3.5 Current consumption vs. power supply voltage Figure 5. Standby current vs. power supply voltage 1.4 No load Vstdby = GND 1.2 Tamb = 25 ° C No load T AMB = 25 ° C 2.5 1.0 Standby Current (μ A) Current Consumption (mA) 3.0 Electrical characteristics 2.0 1.5 1.0 0.8 0.6 0.4 0.5 0.2 0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.0 2.5 3.0 Power Supply Voltage (V) Figure 6. 3.5 4.0 4.5 5.0 5.5 Power Supply Voltage (V) Current consumption vs. standby voltage Figure 7. Efficiency vs. output power 4 0.5 80 Vcc=4.2V Vcc=5V 0.6 2 Efficiency 0.4 60 0.3 40 Vcc=3.6V 1 0 Vcc=2.7V Vcc=3V No load T AMB = 25 ° C 0 1 2 3 Power Dissipation 20 4 0 0.0 5 0.5 1.0 1.5 2.0 Output Power (W) Vcc = 5V F = 1kHz RL = 4 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz T AMB = 25 ° C 2.5 0.2 Power Dissipation (W) 3 Efficiency (%) Current Consumption (mA) 100 0.1 0.0 3.0 Standby Voltage (V) Efficiency vs. output power Figure 9. 100 Efficiency vs. output power 100 0.16 0.35 0.14 0.10 0.08 Power Dissipation 20 0 0.0 0.5 1.0 Output Power (W) Vcc = 5V F = 1kHz RL = 8 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz T AMB = 25 ° C 1.5 0.06 0.04 Efficiency (%) 0.12 60 40 0.30 80 Efficiency Power Dissipation (W) Efficiency (%) 80 Efficiency 0.25 60 0.20 40 Power Dissipation 20 0.02 0.00 2.0 0 0.0 0.2 0.4 0.6 0.8 1.0 Output Power (W) Vcc = 3.6V F = 1kHz RL = 4 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz T AMB = 25 ° C 1.2 1.4 0.15 0.10 Power Dissipation (W) Figure 8. 0.05 0.00 1.6 13/28 Electrical characteristics TS2007FC Figure 10. Efficiency vs. output power Figure 11. Efficiency vs. output power 0.09 100 0.20 0.18 0.08 0.06 60 0.05 40 Power Dissipation 20 0 0.0 0.2 Vcc = 3.6V F = 1kHz RL = 8 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz T AMB = 25 ° C 0.4 0.6 Output Power (W) 0.04 0.03 0.02 100 Efficiency (%) 0.035 0.030 0.025 40 20 0 0.0 0.1 0.2 0.3 Output Power (W) Vcc = 2.7V F = 1kHz RL = 8 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz TAMB = 25 ° C 0.4 0.5 0.020 0.015 0.010 0.005 0.000 2.5 0.7 F = 1kHz BW < 30kHz TAMB = 25 ° C RL=4 Ω + ≥ 15 μ H 1.5 1.0 RL=8 Ω + ≥ 15 μ H 0.5 0.0 2.5 3.0 3.5 4.0 4.5 5.0 10 RL = 4 Ω + 15 μ H F = 100Hz G = +6dB BW < 30kHz 1 T AMB = 25 ° C RL=4 Ω + ≥ 15 μ H 1.5 Vcc=5V Vcc=4.2V Vcc=3.6V Vcc=3V Vcc=2.7V 0.1 RL=8 Ω + ≥ 15 μ H 0.5 14/28 2.5 3.0 3.5 4.0 4.5 Power supply voltage (V) 5.0 0.02 0.00 0.9 0.8 Figure 15. THD+N vs. output power 2.0 0.0 0.04 2.0 THD + N (%) Output power at 10% THD + N (W) 0.3 0.4 0.5 0.6 Output Power (W) 0.06 3.0 2.5 1.0 0.2 Power supply voltage (V) Figure 14. Output power vs. power supply voltage 3.5 F = 1kHz BW < 30kHz 3.0 T AMB = 25 ° C 0.1 0.08 Figure 13. Output power vs. power supply voltage 0.040 60 Power Dissipation 0 0.0 0.045 Power Dissipation 0.10 Vcc = 2.7V F = 1kHz RL = 4 Ω + ≥ 15 μ H THD+N ≤ 10% BW ≤ 30kHz T AMB = 25 ° C 40 0.01 0.050 Efficiency 0.12 20 Figure 12. Efficiency vs. output power 80 60 0.00 1.0 0.8 0.16 Efficiency 0.14 Efficiency (%) 0.07 80 Power Dissipation (W) Efficiency Output power at 1% THD + N (W) Efficiency (%) 80 Power Dissipation (W) 100 5.5 0.01 0.01 0.1 Output power (W) 1 5.5 TS2007FC Electrical characteristics Figure 16. THD+N vs. output power Figure 17. THD+N vs. output power 10 10 RL = 4 Ω + 15 μ H F = 1kHz G = +6dB BW < 30kHz 1 T AMB = 25 ° C Vcc=5V Vcc=4.2V Vcc=3.6V THD + N (%) THD + N (%) RL = 8 Ω + 15 μ H F = 100Hz G = +6dB BW < 30kHz 1 T AMB = 25 ° C Vcc=3V Vcc=2.7V 0.1 Vcc=4.2V Vcc=3.6V Vcc=3V Vcc=2.7V 0.1 Vcc=5V 0.01 0.01 0.1 0.01 0.01 1 0.1 Output power (W) Figure 18. THD+N vs. output power Figure 19. THD+N vs. frequency 10 10 Vcc=4.2V Vcc=3.6V Vcc=3V 1 THD + N (%) RL = 8 Ω + 15 μ H F = 1kHz G = +6dB BW < 30kHz 1 Tamb = 25 ° C THD + N (%) 1 Output power (W) Vcc=2.7V 0.1 Vcc = 5V RL = 4 Ω + 15 μ H G = +6dB BW < 30kHz T AMB = 25 ° C Po=1400mW 0.1 Po=700mW Vcc=5V 0.01 0.01 0.1 0.01 1 100 Output power (W) Figure 20. THD+N vs. frequency 10 Vcc = 5V RL = 8 Ω + 15 μ H G = +6dB BW < 30kHz TAMB = 25 ° C Vcc = 4.2V RL = 4 Ω + 15 μ H G = +6dB BW < 30kHz 1 T AMB = 25 ° C Po=900mW THD + N (%) THD + N (%) 10000 Figure 21. THD+N vs. frequency 10 1 1000 Frequency (Hz) 0.1 Po=1000mW 0.1 Po=450mW Po=500mW 0.01 100 1000 Frequency (Hz) 10000 0.01 100 1000 10000 Frequency (Hz) 15/28 Electrical characteristics TS2007FC Figure 22. THD+N vs. frequency Figure 23. THD+N vs. frequency 10 10 Vcc = 3.6V RL = 4 Ω + 15 μ H G = +6dB BW < 30kHz 1 T AMB = 25 ° C Po=600mW THD + N (%) THD + N (%) Vcc = 4.2V RL = 8 Ω + 15 μ H G = +6dB BW < 30kHz 1 T AMB = 25 ° C 0.1 0.1 Po=300mW 0.01 100 1000 Po=350mW 0.01 10000 100 Frequency (Hz) 10 Vcc = 3V RL = 4 Ω + 15 μ H G = +6dB BW < 30kHz 1 T AMB = 25 ° C THD + N (%) THD + N (%) Vcc = 3.6V RL = 8 Ω + 15 μ H G = +6dB BW < 30kHz 1 TAMB = 25 ° C Po=400mW 0.1 100 1000 Po=250mW 0.01 10000 100 Frequency (Hz) 1000 10000 Frequency (Hz) Figure 26. THD+N vs. frequency Figure 27. THD+N vs. frequency 10 10 Vcc = 2.7V RL = 4 Ω + 15 μ H G = +6dB BW < 30kHz 1 T AMB = 25 ° C Po=300mW THD + N (%) Vcc = 3V RL = 8 Ω + 15 μ H G = +6dB BW < 30kHz 1 TAMB = 25 ° C THD + N (%) Po=500mW 0.1 Po=200mW Po=150mW 0.1 100 1000 Frequency (Hz) 16/28 10000 Figure 25. THD+N vs. frequency 10 0.01 1000 Frequency (Hz) Figure 24. THD+N vs. frequency 0.01 Po=700mW 10000 Po=400mW Po=200mW 0.1 0.01 100 1000 Frequency (Hz) 10000 TS2007FC Electrical characteristics Figure 28. THD+N vs. frequency Figure 29. PSRR vs. frequency 10 0 Inputs grounded Vcc = 5V, 4.2V, 3.6V, 3V, 2.7V Vripple = 200mVpp C IN = 1 μ F -10 Po=250mW -20 RL = ≥ 4 Ω + ≥ 15 μ H TAMB = 25 ° C -30 PSRR (dB) THD + N (%) Vcc = 2.7V RL = 8 Ω + 15 μ H G = +6dB BW < 30kHz 1 TAMB = 25 ° C Po=125mW 0.1 -40 -50 G=+6dB G=+12dB -60 -70 0.01 100 1000 -80 10000 100 1000 Frequency (Hz) Frequency (Hz) Figure 30. PSRR vs. common mode input voltage Figure 31. PSRR vs. common mode input voltage 0 0 Vripple = 200mVpp G = +6dB F = 217Hz RL = ≥ 4 Ω + ≥ 15 μ H T AMB = 25 ° C -20 PSRR (dB) -30 -20 -30 -40 Vcc=3V -50 Vcc=4.2V Vcc=2.7V -60 Vripple = 200mVpp G = +12dB F = 217Hz RL = ≥ 4 Ω + ≥ 15 μ H TAMB = 25 ° C -10 PSRR (dB) -10 -70 0 1 2 Vcc=5V 3 4 Vcc=5V Vcc=2.7V -50 -60 Vcc=3.6V -80 -90 5 Vcc=4.2V 0 1 Common Mode Input Voltage (V) -10 CMRR (dB) CMRR (dB) G = +6dB F = 217Hz RL = ≥ 4Ω + ≥ 15 μ H T AMB = 25 ° C -20 -40 Vcc=5V, 4.2V, 3.6V, 3V, 2.7V -30 -70 -70 -80 Frequency (dB) 10000 Vcc=4.2V Vcc=5V Vcc=2.7V -50 -60 1000 Vcc=3V -40 -60 100 5 Δ Vic = 200mVpp G = +6dB, +12dB Cin = 4.7 μ F RL = ≥ 4 Ω + ≥ 15 μ H Tamb = 25 ° C -30 -80 4 0 Δ Vicm = 200mVpp -50 3 Figure 33. CMRR vs. common mode input voltage 0 -20 2 Common Mode Input Voltage (V) Figure 32. CMRR vs. frequency -10 Vcc=3V -40 -70 Vcc=3.6V -80 -90 10000 Vcc=3.6V 0 1 2 3 4 5 Common Mode Input Voltage (V) 17/28 Electrical characteristics TS2007FC Figure 34. CMRR vs. common mode input voltage Figure 35. Gain vs. frequency 8 0 Δ Vic = 200mVpp -30 6 5 Vcc=3.6V Vcc=3V Gain (dB) CMRR (dB) -20 -40 Vcc=2.7V -50 RL=8 Ω +15 μ H 4 2 -70 1 Vcc=5V Vcc=4.2V 0 1 2 3 4 RL=8 Ω +30 μ H 3 -60 -80 No load 7 G = +12dB F = 217Hz RL = ≥ 4 Ω + ≥ 15 μ H T AMB = 25 ° C -10 RL=4 Ω +30 μ H 0 5 RL=4 Ω +15 μ H Set Gain = +6dB Vin = 500mVpp TAMB = 25 ° C 100 1000 Common Mode Input Voltage (V) Figure 36. Gain vs. frequency Figure 37. Output offset vs. common mode input voltage 14 10 No load 13 12 1 RL=8 Ω +15 μ H 10 |Voo| (mV) Gain (dB) 11 RL=8 Ω +30 μ H 9 RL=4 Ω +30 μ H 8 6 100 1000 1E-3 0.0 10000 Vcc = 5V RL = 8 Ω + 15 μ H T AMB = 25 ° C 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Figure 39. Output offset vs. common mode input voltage 10 10 1 1 |Voo| (mV) |Voo| (mV) Figure 38. Output offset vs. common mode input voltage G=+6dB G=+12dB 0.01 1E-3 0.0 G=+12dB Common Mode Input Voltage (V) Frequency (Hz) 0.1 G=+6dB 0.1 0.01 RL=4 Ω +15 μ H Set Gain = +12dB Vin = 500mVpp T AMB = 25 ° C 7 G=+6dB 0.1 G=+12dB 0.01 Vcc = 3.6V RL = 8 Ω + 15 μ H T AMB = 25 ° C 0.5 1.0 1.5 2.0 2.5 Common Mode Input Voltage (V) 18/28 10000 Frequency (Hz) 3.0 3.5 1E-3 0.0 Vcc = 2.7V RL = 8 Ω + 15 μ H T AMB = 25 ° C 0.5 1.0 1.5 2.0 Common Mode Input Voltage (V) 2.5 TS2007FC Electrical characteristics Flip-Chip Package Power Dissipation (W) Figure 40. Power derating curves Figure 41. Startup and shutdown phase VCC=5 V, G=6 dB, Cin=1 μF, inputs grounded 1.6 Vo1 1.4 Mounted on a 4-layer PCB 1.2 Vo2 1.0 Standby 0.8 0.6 Vo1 - Vo2 0.4 No Heat sink AMR value 0.2 0.0 0 25 50 75 100 125 150 Ambiant Temperature (° C) Figure 42. Startup and shutdown phase VCC=5 V, G=6 dB, Cin=1 μF, Vin=1 Vpp, F=10 kHz Figure 43. Startup and shutdown phase VCC=5 V, G=12 dB, Cin=1 μF, Vin=1 Vpp, F=10 kHz Vo1 Vo1 Vo2 Vo2 Standby Standby Vo1 - Vo2 Vo1 - Vo2 19/28 Application information TS2007FC 4 Application information 4.1 Differential configuration principle The TS2007 is a monolithic fully-differential input/output class D power amplifier. The TS2007 includes a common-mode feedback loop that controls the output bias value to average it at VCC/2 in the range of DC common mode input voltage. This allows the device to always have a maximum output voltage swing, and by consequence, maximize the output power. In addition, as the load is connected differentially compared to a single-ended topology, the output is four times higher for the same power supply voltage. A fully-differential amplifier has the following advantages. 4.2 ● High PSRR (power supply rejection ratio). ● High CMRR (common mode noise rejection). ● Virtually zero pop without additional circuitry, giving a faster start-up time than conventional single-ended input amplifiers. ● Easy interfacing with differential output audio DACs. ● No input coupling capacitors required since there is a 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. Table 11. GS pin gains GS pin Gain (dB) Gain (V/V) 1 6 dB 2 0 12 dB 4 Note: Between the GS pin and VCC there is an internal 300 kΩ resistor. When the pin is floating the gain is 6 dB. In standby mode, this internal resistor is disconnected (HiZ input). 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 Vicm limitation of the input stage (see Table 2: Operating conditions), the common mode feedback loop can fulfill 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 has a greater effect. Cin and the input impedance Zin form a first-order high-pass filter with a -3 dB cut-off frequency (see Table 5 to Table 9). 20/28 TS2007FC 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 75 kΩ. 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 Circuit decoupling A power supply capacitor, referred to as CS, is needed to correctly bypass the TS2007. The TS2007 has a typical switching frequency of 280 kHz and output fall and rise time of less than or equal to 5 ns. Due to these very fast transients, careful decoupling is mandatory. A 1 µF 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. For filtering low frequency noise signals on the power line, it is recommended to use a capacitor CS of at least 1 µF. In addition, even if a ceramic capacitor has an adequate high frequency ESR (equivalent series resistance) value, its current capability is also important. A 0603 size is a good compromise, particularly when a 4 Ω load is used. Another important parameter is the rated voltage of the capacitor. A 1 µF/6.3 V capacitor used at 5 V, loses about 50% of its value: with a power supply voltage of 5 V, the decoupling value, instead of 1 µF, could be reduced to 0.5 µF. 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 (6 V). 4.6 Wake-up time (twu) When the standby is released to set the device ON, there is a wait of 1 ms 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 42 and Figure 43) from the mute to the gain selected by the GS pin (Section 4.2). 21/28 Application information 4.7 TS2007FC Shutdown time When the standby command is set to high, the time required to put the two output stages into high impedance and to put the internal circuitry in shutdown mode, is typically 1 ms. 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 42 and Figure 43). 4.8 Consumption in shutdown mode Between the shutdown pin and GND there is an internal 300 kΩ 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 does not equal 0 V. This extra current is provided by the device that drives the standby pin of the amplifier. Referring to Table 2: Operating conditions on page 4, with a 0.4 V shutdown voltage pin for example, you must add 0.4 V/300 k = 1.3 µA in typical (0.4 V/273 k = 1.46 µA 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 44. Typical application for single-ended input configuration VCC Cs Gain select control Input B2 A2 1uF GS Cin C1 INGain Select A1 IN+ TS2007 Vcc Speaker OUT+ PWM + H Bridge A3 OUT- Cin C2 Standby Standby control 22/28 Oscillator Gnd B3 Standby Control C3 Protection Circuit TS2007FC 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 50 mm, or 100 mm in both directions). 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 2.5 A and impedance greater than 50 Ω at frequencies above 30 MHz. ● Allow extra footprint to place, if necessary, a capacitor to short perturbations to ground (Figure 45). Figure 45. 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 PWM frequency is 280 kHz and fall and rise time of the output signal is less than or equal to 5 ns. In this configuration, it is necessary to use the output filter represented in Figure 46 on page 24, that consists of L1, C1, L2 and C2 as close as possible to the TS2007 outputs. When an output filter is used and there exists a possibility to disconnect a load, it is recommended to use an RC network that consists of C3 and R as shown in Figure 46 on page 24. In this case, when the output filter is connected without any load, the filter acts like a short circuit for input frequencies above 10 kHz. The RC network corrects frequency response of the output filter and compensates this limitation. 23/28 Application information Table 12. TS2007FC Example of component choice RL = 4 Ω Component RL = 8 Ω L1 15μH / 1.4A 30μH / 0.7A L2 15μH / 1.4A 30μH / 0.7A C1 2μF / 10V 1μF / 10V C2 2μF / 10V 1μF / 10V C3 1μF / 10V 1μF / 10V R 22Ω / 0.25W 47Ω / 0.25W Figure 46. LC output filter with RC network LC Output Filter RC network OUT+ L1 C1 C3 from TS2007 RL L2 C2 R OUT- 4.11 Short-circuit protection The TS2007 includes an output short-circuit protection. This protection prevents the device from being damaged if there are fault conditions on the amplifier outputs. When a channel is in operating mode and a short-circuit occurs directly between two outputs (Out+ and Out-) or between an output and ground (Out+ and GND or Out- and GND), the short-circuit protection detects this situation and puts the amplifier into standby. To put the amplifier back into operating mode, put the standby pin to logical LO and then to logical HI. 4.12 Thermal shutdown The TS2007 device has an internal thermal shutdown protection in the event of extreme temperatures to protect the device from overheating. Thermal shutdown is active when the device reaches 150°C. When the temperature decreases to safe levels, the circuit switches back to normal operation. 24/28 TS2007FC 5 Package information 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 47. 9-bump flip-chip pinout (top view) 3 OUT- GND OUT+ 2 GS VCC STBY 1 IN+ VCC IN- A B C Balls are underneath Figure 48. Marking (top view) E ● ● ● K7 X YWW ● ● ● Logo: ST First two digits for part number: K7 Third digit for assembly plant: X Three digit date code: YWW Dot indicates pin A1 E symbol for lead free 25/28 Package information TS2007FC Figure 49. 9-bump flip-chip package mechanical data 1.57 mm ● ● ● 1.57 mm ● ● 0.5mm ● ● 0.5mm ● ∅ 0.25mm ● 40µm 600µm 26/28 Die size: 1.57 mm x 1.57 mm ±30 µm Die height (including bumps): 600 µm Bump diameter: 315 µm ±50 µm Bump diameter before reflow: 300 µm ±10 µm Bump height: 250 µm ±40 µm Die height: 350 µm ±20 µm Pitch: 500 µm ±50 µm Back coating layer height*: 40 µm ±10 µm Coplanarity: 50 µm max * Optional TS2007FC 6 Ordering information Ordering information Table 13. 7 Order codes Order code Temperature range Package Marking TS2007EIJT -40° C to +85° C Flip chip K7 TS2007EKIJT -40° C to +85° C Flip chip with back coating K7 Revision history Table 14. Document revision history Date Revision 19-Aug-2008 1 Changes Initial release. 27/28 TS2007FC 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. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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