ST TS2007 User Manual

Features

TS2007

3 W filter-free Class D audio power amplifer with

6-12 dB fixed gain select

■ Operating range from V

■ Standby mode active low

■ Output power: 1.4 W at 5 V or 0.45 W at 3.0 V

into 8 Ω with 1% THD+N max.

■ Output power: 2.3 W at 5 V or 0.75 W at 3.0 V

into 4 Ω with 1% THD+N max.

■ Fixed gain select: 6 dB or 12 dB

■ Low current consumption

■ Efficiency: 88% typ.

■ Signal-to-noise ratio: 94 dB typ.

■ PSRR: 63 dB typ at 217 Hz with 6 dB gain

■ PWM base frequency: 280 kHz

■ Low pop & click noise

■ Thermal shutdown protection

■ DFN8 3 x 3 mm package

= 2.4 V to 5.5 V

CC

Applications

■ Cellular phones

■ PDAs

■ Notebook PCs

TS2007IQT - DFN8

1

2

3

4

8

7

6

5

Description

The TS2007 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 outstanding efficiency compared to typical class AB audio power amplifiers.

This device allows switching between two different gains: 6 or 12dB via a logic signal on the GS pin. A pop & click reduction circuitry provides low on/off switching noise while allowing the device to start within 5 ms. A standby function (active low) allows lowering the current consumption down to 10 nA typ.

May 2011 Doc ID 13123 Rev 4 1/29

The TS2007 is available in DFN8 3 x 3 mm leadfree packages.

www.st.com

29

Contents TS2007

Contents

1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3

2 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.1 Electrical characteristic tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.2 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4 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 (t

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

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

wu

5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

2/29 Doc ID 13123 Rev 4

TS2007 Absolute maximum ratings and operating conditions

1 Absolute maximum ratings and operating conditions

Table 1. Absolute maximum ratings

Symbol Parameter Value Unit

(2)

(1)

(3)

6V

GND to V

CC

V

200 °C/W

(4)

V

T

R

V

oper

T

Supply voltage

CC

Input voltage

i

Operating free air temperature range -40 to + 85 °C

Storage temperature -65 to +150 °C

stg

Maximum junction temperature 150 °C

j

Thermal resistance junction to ambient

thja

Pd Power dissipation Internally limited

ESD HBM: human body model 2 kV

ESD MM: machine model 200 V

Latch-up Latch-up immunity Class A

Lead temperature (soldering, 10 sec) 260 °C

R

1. All voltage values are measured with respect to the ground pin.

2. The magnitude of the 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 will cause abnormal operation.

Table 2. Operating conditions

Minimum load resistor 3.2 Ω

L

Symbol Parameter Value Unit

V

CC

V

STBY

Supply voltage 2.4 to 5.5 V

Input voltage range GND to V

I

(2)

(1)

GND+0.15 V to VCC-0.7 V V

1.4 ≤ V ≤ V

GND

STBY

≤ VCC ≤ 0.4

Input common mode voltage

ic

Standby voltage input

Device ON Device OFF

CC

(3)

Gain select input:

GS

Gain =12dB Gain = 6dB

R

thja

1. I Voo I ≤ 35 mV max with both differential gains.

2. Without any signal on V

3. Minimum current consumption is obtained when V

4. When mounted on 4-layer PCB.

Load resistor ≥ 4 Ω

L

Thermal resistance junction to ambient

, the device is in standby (internal 300 kΩ pull down resistor).

STBY

(4)

= GND.

≤ VGS ≤ 0.4

GND

1.4 ≤ V

≤ VCC

GS

40 °C/W

V

Doc ID 13123 Rev 4 3/29

Typical application TS2007

2 Typical application

Figure 1. Typical application schematics

VCC

Cs

1uF

Differential

Input

Differential

Input

In-

In+

In-

In+

Input capacitors

are optional

Cin

Input capacitors

are optional

Cin

21

GS Vcc

4

IN-

3

IN+

Standby

VCC

4

IN-

3

IN+

Standby

-

Gain

Select

+

Control

Standby

VCC

21

GS Vcc

-

Gain

Select

+

Control

Standby

67

PWM

Oscillator

Gnd

VCC

67

PWM

Oscillator

Gnd

H

Bridge

H

Bridge

TS2007

OUT+

OUT-

Cs

1uF

TS2007

OUT+

OUT-

8

5

4 LC Output Filter

Ω

15 H

8

5

15 H

30 H

Speaker

μ

2 F

μ

Load

2 F

μ

1 F

μ

VCC

Table 3. External component descriptions

Components Functional description

C

S

Supply capacitor that provides power supply filtering.

Input coupling capacitors (optional) that block the DC voltage at the amplifier input

C

in

terminal. The capacitors also form a high pass filter with Zin

= 1 / (2 x Pi x Zin x Cin)).

(F

cl

4/29 Doc ID 13123 Rev 4

1 F

μ

30 H

μ

8 LC Output Filter

Ω

TS2007 Typical application

Table 4. Pin descriptions

Pin number Pin name Pin description

1 STBY Standby pin ( active low )

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

Doc ID 13123 Rev 4 5/29

Electrical characteristics TS2007

3 Electrical characteristics

3.1 Electrical characteristic tables

Table 5. VCC = +5 V, GND = 0 V, Vic=2.5 V, T

= 25 °C (unless otherwise specified)

amb

Symbol Parameter Min. Typ. Max. Unit

I

CC

I

CC-STBY

V

oo

Supply current No input signal, no load

Standby current No input signal, V

(1)

STBY

Output offset voltage Floating inputs, RL = 8Ω

= GND

2.3 3.3 mA

10 1000 nA

25 mV

Output power

P

o

THD + N

THD = 1% max, f = 1 kHz, RL = 4 Ω THD = 1% max, f = 1 kHz, R THD = 10% max, f = 1 kHz, R

= 8 Ω

L

THD = 10% max, f = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise P

= 1W

o

, G = 6 dB, f =1 kHz, RL = 8 Ω

RMS

= 4 Ω

2.3

1.4

2.8

1.7

0.4 %

Efficiency

PSRR

= 2.1 W

P

o

= 1.3 W

P

o

, RL = 4 Ω (with LC output filter)

RMS

, RL = 8 Ω (with LC output filter)

RMS

Power supply rejection ratio with inputs grounded, C f = 217 Hz, RL = 8 Ω, Gain=6 dB,V

f = 217 Hz, RL = 8 Ω, Gain=12 dB, V

ripple

= 200 mV

pp

in

pp

=1µF

(2)

84 90

63 60

CMRR Common mode rejection ratio 20 Hz < f < 20 kHz 60 dB

W

%

dB

Gain value

Gain

Z

in

Pulse width modulator base frequency 190 280 370 kHz

F

PWM

SNR

t

WU

=0 V

G

S

= VCC

G

S

Single input impedance

(3)

Signal-to-noise ratio (A-weighting) Po=1.5 W, R

=4 Ω (with LC output filter)

L

Wake-up time 5 10 ms

6/29 Doc ID 13123 Rev 4

11.5

5.5

12612.5

6.5

68 75 82 kΩ

94 dB

dB

TS2007 Electrical characteristics

Table 5. VCC = +5 V, GND = 0 V, Vic=2.5 V, T

= 25 °C (unless otherwise specified) (continued)

amb

Symbol Parameter Min. Typ. Max. Unit

t

STBY

Standby time 5 ms

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)

V

N

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)

1. Standby mode is active when V

2. Dynamic measurements - 20*log(rms(V

3. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND.

is tied to GND.

STBY

out

)/rms(V

ripple

)). V

is the superimposed sinus signal to VCC @ f = 217Hz.

ripple

74 50 69 49 94 65 86 64

μV

RMS

Doc ID 13123 Rev 4 7/29

Electrical characteristics TS2007

Table 6. VCC = +4.2 V, GND = 0 V, Vic=2.1 V, T

= 25 °C (unless otherwise specified)

amb

(1)

Symbol Parameter Min. Typ. Max. Unit

I

CC

I

CC-STBY

V

oo

Supply current No input signal, no load

Standby current No input signal, V

(2)

STBY

Output offset voltage Floating inputs, R

= 8 Ω

L

= GND

2.1 3 mA

10 1000 nA

25 mV

Output power

= 4 Ω

L

= 4 Ω

L

1.6

0.95

1.95

1.1

0.45 %

P

o

THD + N

THD = 1% max, f = 1 kHz, R THD = 1% max, f = 1 kHz, RL = 8 Ω

THD = 10% max, f = 1 kHz, R THD = 10% max, f = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise

= 800 mW

P

o

, G = 6 dB, f =1 kHz, RL = 8 Ω

RMS

Efficiency

PSRR

= 1.5 W

P

o

Po = 0.95 W

, RL = 4 Ω (with LC output filter)

RMS

, RL = 8 Ω (with LC output filter)

RMS

Power supply rejection ratio with inputs grounded, C

f = 217 Hz, RL = 8 Ω, Gain = 6 dB,V f = 217 Hz, RL = 8 Ω, Gain = 12 dB, V

ripple

= 200 mV

= 1 µF

in

pp

85 90

(3)

63 60

CMRR Common mode rejection ratio 20 Hz < f < 20 kHz 60 dB

Gain value

Gain

Z

in

F

Pulse width modulator base frequency 190 280 370 kHz

PWM

SNR

t

WU

t

STBY

= 0 V

G

S

GS = V

CC

Single input impedance

(4)

Signal-to-noise ratio (A-weighting) Po=1.2 W, R

=4 Ω (with LC output filter)

L

Wake-up time 5 10 ms

Standby time 5 ms

11.5

5.5

68 75 82 kΩ

12.5

12

6.5

6

93 dB

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)

V

N

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)

1. All electrical values are guaranteed with correlation measurements at 2.4 V and 5 V.

2. Standby mode is active when V

3. Dynamic measurements - 20*log(rms(V

4. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND.

is tied to GND.

STBY

out

)/rms(V

ripple

)). V

is the superimposed sinus signal to VCC @ f = 217 Hz.

ripple

72 50 68 49 93 65 85 64

μV

W

%

dB

RMS

8/29 Doc ID 13123 Rev 4

TS2007 Electrical characteristics

Table 7. VCC = +3.6 V, GND = 0 V, Vic=1.8 V, T

= 25 °C (unless otherwise specified)

amb

(1)

Symbol Parameter Min. Typ. Max. Unit

I

CC

I

CC-STBY

V

oo

Supply current No input signal, no load

Standby current No input signal, V

(2)

STBY

= GND

Output offset voltage Floating inputs, RL = 8 Ω

22.8mA

10 1000 nA

25 mV

Output power

1.1

0.65

1.4

0.85

0.3 %

P

o

THD + N

THD+N = 1% max, f = 1 kHz, RL = 4 Ω THD+N = 1% max, f = 1 kHz, R THD = 10% max, f = 1 kHz, R

L

= 4 Ω

L

THD = 10% max, f = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise

= 500 mW

P

o

, G = 6 dB, f = 1 kHz, RL = 8 Ω

RMS

= 8 Ω

Efficiency

PSRR

= 1.1 W

P

o

= 0.65 W

P

o

, RL = 4 Ω (with LC output filter)

RMS

, RL = 8 Ω (with LC output filter)

RMS

Power supply rejection ratio with inputs grounded, C f = 217 Hz, RL = 8 Ω, Gain = 6 dB, V

f = 217 Hz, RL = 8 Ω, Gain = 12 dB, V

ripple

= 200 mV

in

pp

=1 µF

(3)

84 90

63 60

CMRR Common mode rejection ratio 20 Hz < f < 20 kHz 60 dB

W

%

dB

Gain value

Gain

Z

in

Pulse width modulator base frequency 190 280 370 kHz

F

PWM

SNR

t

WU

t

STBY

= 0 V

G

S

= VCC

G

S

Single input impedance

(4)

Signal-to-noise ratio (A-weighting) Po = 0.9 W, R

= 4 Ω (with LC output filter)

L

Wake-up time 5 10 ms

Standby time 5 ms

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)

V

N

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)

1. All electrical values are guaranteed with correlation measurements at 2.4 V and 5 V.

2. Standby mode is active when V

3. Dynamic measurements - 20*log(rms(V

4. Independent of Gain configuration (6 or 12 dB) and between IN+ or IN- and GND.

is tied to GND.

STBY

out

)/rms(V

ripple

)). V

is the superimposed sinus signal to VCC @ f = 217 Hz.

ripple

11.5

5.5

12612.5

6.5

68 75 82 kΩ

92 dB

72 50 68 49

μV 93 65

85 64

dB

RMS

Doc ID 13123 Rev 4 9/29