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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 8 with 1% THD+N max. Output power: 2.3W @5V or 0.75W @ 3.0V into 4 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
1 2 3 4
8 7 6 5
Applications

Cellular phone PDA Notebook PC
Description
The TS2007 is a class D power audio amplifier. Able to drive up to 1.4W into an 8 load at 5V, it achieves outstanding efficiency compared to typical class AB audio power amplifier. 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. The TS2007 is available in DFN8 3x3mm leadfree packages.
May 2007
Rev 2
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Contents
TS2007
Contents
1 2 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 3.2 Electrical characteristic tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Common mode feedback loop limitations . . . . . . . . . . . . . . . . . . . . . . . . . 22 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Wake-up time (twu) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Shutdown time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 6 7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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TS2007
Absolute maximum ratings and operating conditions
1
Absolute maximum ratings and operating conditions
Table 1.
Symbol VCC Vi Toper Tstg Tj Rthja Pd ESD ESD Supply voltage (1) Input voltage
(2)
Absolute maximum ratings
Parameter Value 6 GND to VCC -40 to + 85 -65 to +150 150
(3)
Unit V V C C C C/W
(4)
Operating free air temperature range Storage temperature Maximum junction temperature Thermal resistance junction to ambient Power dissipation HBM: human body model MM: machine model
200 Internally limited 2 200 Class A 260
kV V
Latch-up Latch-up immunity Lead temperature (soldering, 10sec)
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.
C
3. The device is protected in case of over temperature by a thermal shutdown active @ 150C. 4. Exceeding the power derating curves during a long period will cause abnormal operation.
Table 2.
Symbol VCC VI Vic
Operating conditions
Parameter Supply voltage Input voltage range Input common mode voltage(1) Standby voltage input (2) Device ON Device OFF Gain select input: Gain =12dB Gain = 6dB Load resistor Thermal resistance junction to ambient
(4)
Value 2.4 to 5.5 GND to VCC GND+0.15V to VCC0.7V 1.4 VSTBY VCC GND VSTBY 0.4 (3) GND VGS 0.4 1.4 VGS VCC 4 40
Unit V V V
VSTBY
V
GS RL Rthja
V C/W
1. I Voo I 35mV max with both differential gains. 2. Without any signal on VSTBY, the device is in standby (internal 300k pull down resistor). 3. Minimum current consumption is obtained when VSTBY = GND. 4. When mounted on 4-layer PCB.
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Typical application
TS2007
2
Typical application
Figure 1. Typical application schematics
VCC VCC
Cs 1uF Input capacitors are optional InCin
TS2007
2
GS
4
Differential Input Cin In+
6
Vcc PWM +
INGain Select IN+ Standby Control
OUT+ H Bridge OUT-
8 5
Speaker
3
Oscillator Gnd
Standby
1
VCC
VCC VCC
Cs 1uF Input capacitors are optional InCin 4 LC Output Filter 15 H OUT+ PWM H Bridge OUT-
7
TS2007
2
GS
6
Vcc +
4
Differential Input Cin In+
INGain Select IN+ Standby Control
8 5
15 H
2F Load 2F
3
Oscillator Gnd 30 H 1F 1F
Standby
1
7
30 H
8 LC Output Filter
VCC
Table 3.
External component descriptions
Functional description Supply capacitor that provides power supply filtering. 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)).
Components CS Cin
4/29
TS2007 Table 4. Pin descriptions
Pin name STBY GS IN+ INOUTVCC GND OUT+ Pin description Standby pin ( active low ) Gain select input Positive differential input Negative differential input Positive differential output Power supply Ground Negative differential output
Typical application
Pin number 1 2 3 4 5 6 7 8
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Electrical characteristics
TS2007
3
3.1
Table 5.
Symbol ICC ICC-STBY Voo
Electrical characteristics
Electrical characteristic tables
VCC = +5V, GND = 0V, Vic=2.5V, Tamb = 25C (unless otherwise specified)
Parameter Supply current No input signal, no load Standby current (1) No input signal, VSTBY = GND Output offset voltage Floating inputs, RL = 8 Output power THD = 1% max, f = 1kHz, RL = 4 THD = 1% max, f = 1kHz, RL = 8 THD = 10% max, f = 1kHz, RL = 4 THD = 10% max, f = 1kHz, RL = 8 Total harmonic distortion + noise Po = 1WRMS, G = 6dB, f =1kHz, RL = 8 Efficiency Po = 2.1 WRMS, RL = 4 (with LC output filter) Po = 1.3 WRMS, RL = 8 (with LC output filter) Power supply rejection ratio with inputs grounded, Cin=1F (2) f = 217Hz, RL = 8, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8, Gain=12dB, Vripple = 200mVpp Common mode rejection ratio 20Hz < f < 20kHz Gain value GS =0V GS = VCC Single input impedance (3) Pulse width modulator base frequency Signal to noise ratio (A-weighting) Po=1.5W, RL=4 (with LC output filter) Wake-up time 11.5 5.5 68 190 2.3 1.4 2.8 1.7 0.4 Min. Typ. 2.3 10 Max. 3.3 1000 25 Unit mA nA mV
Po
W
THD + N
%
Efficiency
84 90
%
PSRR CMRR Gain Zin FPWM SNR tWU
63 60 60 12 6 75 280 94 5 10 12.5 6.5 82 370
dB dB dB k kHz dB ms
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TS2007 Table 5.
Symbol tSTBY Standby time Output voltage noise f = 20Hz to 20kHz, RL=4 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)
Electrical characteristics VCC = +5V, GND = 0V, Vic=2.5V, Tamb = 25C (unless otherwise specified) (continued)
Parameter Min. Typ. 5 74 50 69 49 94 65 86 64 Max. Unit ms
VN
VRMS
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.
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Electrical characteristics Table 6.
Symbol ICC ICC-STBY Voo Supply current No input signal, no load Standby current (2) No input signal, VSTBY = GND Output offset voltage Floating inputs, RL = 8 Output power THD = 1% max, f = 1kHz, RL = 4 THD = 1% max, f = 1kHz, RL = 8 THD = 10% max, f = 1kHz, RL = 4 THD = 10% max, f = 1kHz, RL = 8 Total harmonic distortion + noise Po = 800mWRMS, G = 6dB, f =1kHz, RL = 8 Efficiency Po = 1.5 WRMS, RL = 4 (with LC output filter) Po = 0.95 WRMS, RL = 8 (with LC output filter) Power supply rejection ratio with inputs grounded, Cin=1F (3) f = 217Hz, RL = 8, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8, Gain=12dB, Vripple = 200mVpp Common mode rejection ratio 20Hz < f < 20kHz Gain value GS = 0V GS = VCC Single input impedance (4) Pulse width modulator base frequency Signal to noise ratio (A-weighting) Po=1.2W, RL=4 (with LC output filter) Wake-up time Standby time Output voltage noise f = 20Hz to 20kHz, RL=4 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) 11.5 5.5 68 190 1.6 0.95 1.95 1.1 0.45
TS2007
VCC = +4.2V, GND = 0V, Vic=2.1V, Tamb = 25C (unless otherwise specified)(1)
Parameter Min. Typ. 2.1 10 Max. 3 1000 25 Unit mA nA mV
Po
W
THD + N
%
Efficiency
85 90 63 60 60 12 6 75 280 93 5 5 72 50 68 49 93 65 85 64 10 12.5 6.5 82 370
%
PSRR CMRR Gain Zin FPWM SNR tWU tSTBY
dB dB dB k kHz dB ms ms
VN
VRMS
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.
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TS2007 Table 7.
Symbol ICC ICC-STBY Voo Supply current No input signal, no load Standby current (2) No input signal, VSTBY = GND Output offset voltage Floating inputs, RL = 8 Output power THD+N = 1% max, f = 1kHz, RL = 4 THD+N = 1% max, f = 1kHz, RL = 8 THD = 10% max, f = 1kHz, RL = 4 THD = 10% max, f = 1kHz, RL = 8 Total harmonic distortion + noise Po = 500mWRMS, G = 6dB, f = 1kHz, RL = 8 Efficiency Po = 1.1 WRMS, RL = 4 (with LC output filter) Po = 0.65 WRMS, RL = 8 (with LC output filter) Power supply rejection ratio with inputs grounded, Cin=1F (3) f = 217Hz, RL = 8, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8, Gain=12dB, Vripple = 200mVpp Common mode rejection ratio 20Hz < f < 20kHz Gain value GS = 0V GS = VCC Single input impedance (4) Pulse width modulator base frequency Signal to noise ratio (A-weighting) Po=0.9W, RL=4 (with LC output filter) Wake-up time Standby time Output voltage noise f = 20Hz to 20kHz, RL=4 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)
Electrical characteristics VCC = +3.6V, GND = 0V, Vic=1.8V, Tamb = 25C (unless otherwise specified)(1)
Parameter Min. Typ. 2 10 Max. 2.8 1000 25 Unit mA nA mV
Po
1.1 0.65 1.4 0.85 0.3
W
THD + N
%
Efficiency
84 90
%
PSRR CMRR Gain Zin FPWM SNR tWU tSTBY
63 60 60 11.5 5.5 68 190 12 6 75 280 92 5 5 72 50 68 49 93 65 85 64 10 12.5 6.5 82 370
dB dB dB k kHz dB ms ms
VN
VRMS
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.
Symbol ICC ICC-STBY Voo Supply current No input signal, no load Standby current (2) No input signal, VSTBY = GND Output offset voltage Floating inputs, RL = 8 Output power THD+N = 1% Max, f = 1kHz, RL = 4 THD+N = 1% Max, f = 1kHz, RL = 8 THD = 10% Max, f = 1kHz, RL = 4 THD = 10% Max, f = 1kHz, RL = 8 Total harmonic distortion + noise Po = 400mWRMS, G = 6dB, f = 1kHz, RL = 8 Efficiency Po = 0.75 WRMS, RL = 4 (with LC output filter) Po = 0.45 WRMS, RL = 8 (with LC output filter) Power supply rejection ratio with inputs grounded, Cin=1F (3) f = 217Hz, RL = 8, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8, Gain=12dB, Vripple = 200mVpp Common mode rejection ratio 20Hz < f < 20kHz Gain value GS = 0V GS = VCC Single input impedance (4) Pulse width modulator base frequency Signal to noise ratio (A-weighting) Po=0.6W, RL=4 (with LC output filter) Wake-up time Standby time Output voltage noise f = 20Hz to 20kHz, RL=4 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) 11.5 5.5 68 190 0.75 0.45 1 0.6 0.5
TS2007
VCC = +3.0V, GND = 0V, Vic=1.5V, Tamb = 25C (unless otherwise specified)(1)
Parameter Min. Typ. 1.9 10 Max. 2.7 1000 25 Unit mA nA mV
Po
W
THD + N
%
Efficiency
83 90
%
PSRR CMRR Gain Zin FPWM SNR tWU tSTBY
63 60 60 12 6 75 280 90 5 5 71 50 67 49 92 65 85 64 10 12.5 6.5 82 370
dB dB dB k kHz dB ms ms
VN
VRMS
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.
Symbol ICC ICC-STBY Voo Supply current No input signal, no load Standby current (1) No input signal, VSTBY = GND Output offset voltage Floating inputs, RL = 8 Output power THD+N = 1% Max, f = 1kHz, RL = 4 THD+N = 1% Max, f = 1kHz, RL = 8 THD = 10% Max, f = 1kHz, RL = 4 THD = 10% Max, f = 1kHz, RL = 8 Total harmonic distortion + noise Po = 200mWRMS, G = 6dB, f = 1kHz, RL = 8 Efficiency Po = 0.38 WRMS, RL = 4 (with LC output filter) Po = 0.25 WRMS, RL = 8 (with LC output filter) Power supply rejection ratio with inputs grounded, Cin=1F (2) f = 217Hz, RL = 8, Gain=6dB, Vripple = 200mVpp f = 217Hz, RL = 8, Gain=12dB, Vripple = 200mVpp Common mode rejection ratio 20Hz < f < 20kHz Gain value GS = 0V GS = VCC Single input impedance (3) Pulse width modulator base frequency Signal to noise ratio (A-weighting) Po=0.4W, RL=4 (with LC output filter) Wake-up time Standby time Output voltage noise f = 20Hz to 20kHz, RL=4 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)
Electrical characteristics VCC = +2.4V, GND = 0V, Vic=1.2V, Tamb = 25C (unless otherwise specified)
Parameter Min. Typ. 1.7 10 Max. 2.4 1000 25 Unit mA nA mV
Po
0.48 0.3 0.6 0.36 0.1
W
THD + N
%
Efficiency
82 90
%
PSRR CMRR Gain Zin FPWM SNR tWU tSTBY
63 60 60 11.5 5.5 68 190 12 6 75 280 88 5 5 70 50 66 49 91 65 84 64 10 12.5 6.5 82 370
dB dB dB k kHz dB ms ms
VN
VRMS
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
TS2007
3.2
Electrical characteristic curves
The graphs shown in this section use the following abbreviations:

RL+ 15H or 30H = pure resistor + very low series resistance inductor Filter = LC output filter (1F+30H for 4 and 0.5F+60H for 8)
All measurements are done with CS1=1F and CS2=100nF (see Figure 2, except for the PSRR where CS1 is removed (see Figure 3). Figure 2. Test diagram for measurements
VCC
Cs1 1 F Cs2 100nF
GND
Cin In+ Out+
GND
RL 4 or 8 15 H or 30 H or LC Filter 5th order 50kHz low-pass filter
TS2007 InCin Out-
GND
Audio Measurement Bandwith < 30kHz
Figure 3.
Test diagram for PSRR measurements
VCC
Cs2 100nF 20Hz to 20kHz
Vripple
Vcc
1 F Cin In+
GND
Out+
GND
RL 4 or 8 15 H or 30 H or LC Filter 5th order 50kHz low-pass filter
TS2007 InCin 1 F Out-
GND
GND
5th order 50kHz low-pass filter reference
RMS Selective Measurement Bandwith =1% of Fmeas
12/29
TS2007 Table 10. Index of graphics
Description Current consumption vs. power supply voltage Current consumption vs. standby voltage Efficiency vs. output power Output power vs. power supply voltage PSRR vs. common mode input voltage PSRR vs. frequency CMRR vs. common mode input voltage CMRR vs. frequency Gain vs. frequency THD+N vs. output power THD+N vs. frequency Power derating curves Startup and shutdown time
Electrical characteristics
Figure Figure 4 Figure 5 Figure 6 - Figure 9 Figure 10, Figure 11 Figure 12 Figure 13 - Figure 17 Figure 18 Figure 19 - Figure 23 Figure 24, Figure 25 Figure 26 - Figure 33 Figure 34 - Figure 45 Figure 46 Figure 47 - Figure 49
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Electrical characteristics
TS2007
Figure 4.
Current consumption vs. power supply voltage
Figure 5.
Current consumption vs. standby voltage
3.0 T AMB =25C
Current Consumption (mA) Current Consumption (mA)
2.5 No Loads 2.0 V CC =5V 1.5
2.5 2.0 1.5 1.0 0.5 0.0
1.0 V CC =2.4V 0.5
V CC=3.6V
2
3
4
5
0.0
No Load T AMB=25C 0 1 2 3 4 5
Power Supply Voltage (V)
Standby Voltage (V)
Figure 6.
100
Efficiency vs. output power
200 Efficiency
Power Dissipation (mW)
Figure 7.
100
Efficiency vs. output power
500
Efficiency
Efficiency (%)
60 Power Dissipation 40 Vcc=3V RL=4 + 15H F=1kHz THD+N1% 0.1 0.2 0.3 0.4 0.5 Output Power (W) 0.6 0.7
120
60
300
80
40 Power Dissipation Vcc=5V RL=4 + 15H F=1kHz THD+N1% 2.0
200
20
40
20
100
0 0.0
0 0.8
0 0.0
0.5
1.0 1.5 Output Power (W)
0 2.5
Figure 8.
100
Efficiency vs. output power
50
Figure 9.
100
Efficiency vs. output power
125
Power Dissipation (mW)
60
30
60
75
40
Power Dissipation Vcc=3V RL=8 + 15H F=1kHz THD+N1% 0.1 0.2 0.3 Output Power (W) 0.4
20
40
Power Dissipation Vcc=5V RL=8 + 15H F=1kHz THD+N1% 0.2 0.4 0.6 0.8 Output Power (W) 1.0 1.2
50
20
10
20
25
0 0.0
0 0.5
0 0.0
0 1.4
14/29
Power Dissipation (mW)
80
Efficiency (%)
Efficiency
40
80
Efficiency (%)
Efficiency
100
Power Dissipation (mW)
80
Efficiency (%)
160
80
400
TS2007
Electrical characteristics
Figure 10. Output power vs. power supply voltage
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 THD+N=1% RL = 4 + 15H F = 1kHz BW < 30kHz Tamb = 25C
Figure 11. Output power vs. power supply voltage
2.0 RL = 8 + 15H F = 1kHz BW < 30kHz Tamb = 25C THD+N=10%
1.6
Output power (W)
Output power (W)
THD+N=10%
1.2
0.8 THD+N=1%
0.4
2
3
4 5 Power Supply Voltage (V)
6
0.0
2
3
4 5 Power Supply Voltage (V)
6
Figure 12. PSRR vs. common mode input voltage
0 -10 -20
PSRR(dB)
Figure 13. PSRR vs. frequency
0
Vripple = 200mVpp, F = 217Hz, G = 6dB RL 4 + 15H, Tamb = 25C
-10 -20
PSRR (dB)
Inputs grounded, Vripple = 200mVpp, V CC =5V, R L=4 +15H, C IN =1F, T AMB=25C
-30 -40 -50 -60 -70 -80 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Vcc=2.4V Vcc=3V Vcc=3.6, 4.2, 5V
-30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
Gain=12dB Gain=6dB
10k
20k
Common Mode Input Voltage (V)
Figure 14. PSRR vs. frequency
0 -10 -20 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=4 +15H, C IN =1F, T AMB =25C
Figure 15. PSRR vs. frequency
0 -10 -20
PSRR (dB)
Inputs grounded, Vripple = 200mVpp A V =6dB, R L=4 +30H, C IN =1F, TAMB =25C
PSRR (dB)
-30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
-30 -40 -50 -60 -70 Vcc=2.4, 3, 3.6, 4.2, 5V
Vcc=2.4, 3, 3.6, 4.2, 5V
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
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Electrical characteristics
TS2007
Figure 16. PSRR vs. frequency
0 -10 -20 Inputs grounded, Vripple = 200mVpp A V =6dB, R L=8 +15H, C IN =1F, T AMB =25C
Figure 17. PSRR vs. frequency
0 -10 -20
PSRR (dB)
Inputs grounded, Vripple = 200mVpp A V =6dB, R L=8 +30H, C IN =1F, TAMB =25C
PSRR (dB)
-30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
-30 -40 -50 -60 -70 Vcc=2.4, 3, 3.6, 4.2, 5V
Vcc=2.4, 3, 3.6, 4.2, 5V
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
Figure 18. CMRR vs. common mode input voltage
0 -10 -20
Vicm=200mVpp, F = 217Hz, G=6dB RL 4 + 15H, T AMB =25C
Figure 19. CMRR vs. frequency
0 -10 -20
CMRR (dB)
Vicm=200mVpp, V CC =5V
R L=4 +15H, C IN=1F, TAMB =25C
PSRR(dB)
-30 -40 -50 -60 -70 -80 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Vcc=2.4V Vcc=3V Vcc=3.6, 4.2, 5V
-30 -40 Gain=12dB -50 -60 -70 -80 20 100 Gain=6dB 1k
Frequency (Hz)
10k
20k
Common Mode Input Voltage (V)
Figure 20. CMRR vs. frequency
0 -10 -20 -30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
Vicm=200mVpp, G=6dB R L=4 +15H, C IN =1F, T AMB =25C
Figure 21. CMRR vs. frequency
0 -10 -20
CMRR (dB)
Vicm=200mVpp, G=6dB R L=4 +30H, C IN=1F, TAMB =25C
CMRR (dB)
-30 -40 -50 -60 -70 Vcc=2.4, 3, 3.6, 4.2, 5V
Vcc=2.4, 3, 3.6, 4.2, 5V
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
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TS2007
Electrical characteristics
Figure 22. CMRR vs. frequency
0 -10 -20 -30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
Vicm=200mVpp, G=6dB R L=8 +15H, C IN =1F, T AMB =25C
Figure 23. CMRR vs. frequency
0 -10 -20
CMRR (dB)
Vicm=200mVpp, G=6dB R L=8 +30H, C IN=1F, TAMB =25C
CMRR (dB)
-30 -40 -50 -60 -70 Vcc=2.4, 3, 3.6, 4.2, 5V
Vcc=2.4, 3, 3.6, 4.2, 5V
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
Figure 24. Gain vs. frequency
8 no load 6
PSRR (dB)
Figure 25. Gain vs. frequency
14 no load 12
PSRR (dB)
4
RL=8 +15H RL=8 +30H
10
RL=8 +15H RL=8 +30H
2 Gain = 6dB Vin = 500 mVpp T AMB = 25C 20 100
RL=4 +15H RL=4 +30H
8 Gain = 12dB Vin = 500 mVpp T AMB = 25C 20 100
RL=4 +15H RL=4 +30H 1k
Frequency (Hz)
0
6
1k Frequency (Hz)
10k
20k
10k
20k
Figure 26. THD+N vs. output power
10 RL = 4 + 15H F = 1kHz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
Figure 27. THD+N vs. output power
10 RL = 4 + 30H F = 1kHz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
1
THD + N (%)
THD + N (%)
1
0.1
0.1
1E-3
0.01
0.1 Output Power (W)
1
3
1E-3
0.01
0.1 Output Power (W)
1
3
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Electrical characteristics
TS2007
Figure 28. THD+N vs. output power
10 RL = 8 + 15H F = 1kHz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V
Figure 29. THD+N vs. output power
10 RL = 8 + 30H F = 1kHz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
THD + N (%)
1
THD + N (%)
Vcc=2.4V
1
0.1
0.1
1E-3
0.01 0.1 Output Power (W)
1
2
1E-3
0.01 0.1 Output Power (W)
1
2
Figure 30. THD+N vs. output power
10 RL = 4 + 15H F = 100Hz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V
Figure 31. THD+N vs. output power
10 RL = 4 + 30H F = 100Hz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
THD + N (%)
THD + N (%)
1
Vcc=2.4V
1
0.1
0.1
0.01 1E-3
0.01
0.1 Output Power (W)
1
3
0.01 1E-3
0.01
0.1 Output Power (W)
1
3
Figure 32. THD+N vs. output power
10 RL = 8 + 15H F = 100Hz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
Figure 33. THD+N vs. output power
10 RL = 8 + 30H F = 100Hz G = 6dB BW < 30kHz Tamb = 25C
Vcc=5V Vcc=3.6V Vcc=2.4V
THD + N (%)
0.1
THD + N (%)
1
1
0.1
0.01 1E-3
0.01 0.1 Output Power (W)
1
2
0.01 1E-3
0.01 0.1 Output Power (W)
1
2
18/29
TS2007
Electrical characteristics
Figure 34. THD+N vs. frequency
10 RL=4 + 15H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25C
Figure 35. THD+N vs. frequency
10 RL=4 + 30H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25C
Po=0.4W
Po=0.4W
1
THD + N (%)
1
THD + N (%)
0.1
Po=0.2W
0.1
Po=0.2W
0.01
20
100
1000 Frequency (Hz)
10000 20k
0.01
20
100
1000 Frequency (Hz)
10000 20k
Figure 36. THD+N vs. frequency
10 RL=8 + 15H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25C
Figure 37. THD+N vs. frequency
10 RL=8 + 30H G=6dB Bw < 30kHz Vcc=2.4V Tamb = 25C
Po=0.2W
Po=0.2W
1
THD + N (%)
1
THD + N (%)
Po=0.1W
0.1
0.1
Po=0.1W
0.01
20
100
1000 Frequency (Hz)
10000 20k
0.01
20
100
1000 Frequency (Hz)
10000 20k
Figure 38. THD+N vs. frequency
10 RL=4 + 15H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25C
Figure 39. THD+N vs. frequency
10 RL=4 + 30H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25C
Po=0.9W
Po=0.9W
1
THD + N (%)
1
THD + N (%)
Po=0.45W
0.1
0.1
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
10 RL=8 + 15H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25C
Figure 41. THD+N vs. frequency
10 RL=8 + 30H G=6dB Bw < 30kHz Vcc=3.6V Tamb = 25C
Po=0.5W
Po=0.5W
1
THD + N (%)
1
THD + N (%)
Po=0.25W
0.1
0.1
Po=0.25W
0.01
20
100
1000 Frequency (Hz)
10000 20k
0.01
20
100
1000 Frequency (Hz)
10000 20k
Figure 42. THD+N vs. frequency
10 RL=4 + 15H G=6dB Bw < 30kHz Vcc=5V Tamb = 25C
Figure 43. THD+N vs. frequency
10 RL=4 + 30H G=6dB Bw < 30kHz Vcc=5V Tamb = 25C
Po=1.5W
1
THD + N (%)
Po=1.5W
1
THD + N (%)
0.1
Po=0.75W
0.1
Po=0.75W
0.01
20
100
1000 Frequency (Hz)
10000 20k
0.01
20
100
1000 Frequency (Hz)
10000 20k
Figure 44. THD+N vs. frequency
10 RL=8 + 15H G=6dB Bw < 30kHz Vcc=5V Tamb = 25C
Figure 45. THD+N vs. frequency
10 RL=8 + 30H G=6dB Bw < 30kHz Vcc=5V Tamb = 25C
Po=0.9W
Po=0.9W
1
THD + N (%)
1
THD + N (%)
Po=0.45W
0.1
0.1
Po=0.45W
0.01
20
100
1000 Frequency (Hz)
10000 20k
0.01
20
100
1000 Frequency (Hz)
10000 20k
20/29
TS2007
Electrical characteristics
Figure 46. Power derating curves
Figure 47. Startup and shutdown phase VCC=5V, G=6dB, Cin=1F, inputs grounded
3.5
DFN8 Package Power Dissipation (W)
3.0 2.5
Mounted on a 4-layer PCB
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=1F, Vin=1Vpp, VCC=5V, G=12dB, Cin=1F, Vin=1Vpp, F=10kHz F=10kHz
21/29
Application information
TS2007
4
4.1
Application information
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:

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
4.2
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 1 0 Gain (dB) 6dB 12dB Gain (V/V) 2 4
Note:
Between the GS pin and VCC there is an internal 300k 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):
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TS2007
Application information
1 F CL = ------------------------------------------2 Z in C in
So, for a desired cut-off frequency FCL we can calculate Cin:
1 C in = --------------------------------------------2 Z in F CL
with FCL in Hz, Zin in and Cin in F. The input impedance Zin is for the whole power supply voltage range, typically 75k . 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:

F CLmax = 1.103 F CL F CLmin = 0.915 F CL
4.5
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 1F 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 4 load is used. Another important parameter is the rated voltage of the capacitor. A 1F/6.3V capacitor used at 5V, loses about 50% of its value. With a power supply voltage of 5V, the decoupling value, instead of 1F, could be reduced to 0.5F. 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).
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Application information
TS2007
4.7
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 300k 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=1.3A in typical (0.4V/273k=1.46A 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 Gain Select Control TS2007
2
Input
Cin
GS
4 3
6
Vcc + PWM
INGain Select IN+
OUT+ H Bridge OUT-
8 5
Speaker
Cin Standby Control Standby Oscillator Gnd
1
Standby Control
24/29
7
TS2007
Application information
4.10
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 50 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.
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Package information
TS2007
5
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK(R) 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 2 3 4
8 7 6 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 Figure 55. DFN8 package mechanical data
Dimensions Ref Min A A1 A3 b D D2 E E2 e L
(1)
Package information
Millimeters Typ 0.60 0.02 Max 0.65 0.05 0.22 0.25 2.85 1.60 2.85 1.10 0.30 3.00 1.70 3.00 1.20 0.65 0.50 0.55 0.60 0.08
SEATING PLANE C
Mils Min 19.6 Typ 23.6 0.8 Max 25.6 1.9 8.6 9.8 112.2 63 112.2 43.3 11.8 118.1 66.9 118.1 47.2 25.5 19.6 21.6 23.6 3.1
C
0.50
0.35 3.15 1.80 3.15 1.30
13.8 124 70.8 124 51.2
ddd
A3
A1
D
e 1 2 3 4
E2
A
8
7
6 b D2
5
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
E
ddd
Ordering information
TS2007
6
Ordering information
Table 11. Order code
Temperature range -40C, +85C Package DFN8 Marking K07
Part number TS2007IQT
7
Revision history
Date 11-Jan-2006 11-May-2007 Revision 1 2 Changes Initial release (preliminary data). First complete datasheet. This release of the datasheet includes electrical characteristics curves and application information.
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TS2007
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