ST TS2007FC User Manual

Features

TS2007FC

3 W filter-free class-D audio power amplifier

with 6 or 12 dB fixed gain select

■ Operates from V

■ Standby mode active low

■ Output power: 1.4 W at 5 V or 0.5 W at 3.0 V

= 2.4 V to 5.5 V

CC

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.

■ 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

Applications

■ Cellular phones

■ PDAs

■ Notebook PCs

TS2007EIJT - 9-bump flip-chip

Pinout (top view)

OUT-

GS

IN+

GND

VCC

VCC IN-

OUT+

STBY

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

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.

typical class-AB audio power amplifiers.

This device can switch between two gain settings, 6 dB or 12 dB via a logic signal on the gain select pin. The pop and click reduction circuitry provides low on/off switching noise and allows the device to start within 1 ms typically.

May 2011 Doc ID 14937 Rev 2 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

3.1 Electrical characteristics tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.2 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4 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 (t

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

) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

wu

5 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

2/28 Doc ID 14937 Rev 2

TS2007FC Absolute maximum ratings and operating conditions

1 Absolute maximum ratings and operating conditions

Table 1. Absolute maximum ratings (AMR)

Symbol Parameter Value Unit

(2)

(1)

(6)

(5)

(7)

(3)

6V

GND to V

CC

V

200 °C/W

(4)

2kV

200 V

V

T

R

V

oper

T

P

Supply voltage

CC

Input voltage

in

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

Power dissipation Internally limited

d

Human body model

ESD

Machine model

Latch-up Latch-up immunity Class A = 200 mA

Lead temperature (soldering, 10 sec) 260 °C

Output short circuit protection

R

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.

Minimum load resistor 3.2 Ω

L

Doc ID 14937 Rev 2 3/28

Absolute maximum ratings and operating conditions TS2007FC

Table 2. Operating conditions

Symbol Parameter Value Unit

V

STBY

V

R

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

2. Without any signal on V

3. Minimum current consumption is obtained when V

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.

Supply voltage 2.4 to 5.5 V

CC

Input voltage range GND to V

in

Input common mode voltage range

icm

Standby voltage input:

(2)

(1)

Device ON Device OFF

Gain select input voltage:

GS

Gain = 6 dB

(4)

Gain = 12 dB

Load resistor ≥ 4 Ω

L

STBY

(5)

= GND.

Thermal resistance junction to ambient

thja

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

STBY

GND + 0.15 V to

- 0.7 V

V

CC

1.4 ≤ V

GND ≤ V

STBY

1.4 ≤ VGS ≤ VCC GND ≤ VGS ≤ 0.4

90 °C/W

CC

≤ VCC

≤ 0.4

(3)

V

4/28 Doc ID 14937 Rev 2

TS2007FC Application information

2 Application information

Table 3. External component description

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. 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

Gain select control

VCC

Cs

1uF

Differential

Input

Input capacit ors

are optional

In-

Ci n

C1

A1

Ci n

In+

Standby control

IN-

IN+

A2

GS

Gain

Select

Standby

Con tr ol

-

+

Oscil lator

StandbyGnd

C2

Note: See Section 4.10: Output filter considerations on page 23.

Doc ID 14937 Rev 2 5/28

B2

Vcc

PWM

B3

TS2007FC

H

Bridge

Protection

Ci rcuit

OUT+

OUT-

Speaker

C3

A3

Electrical characteristics TS2007FC

3 Electrical characteristics

3.1 Electrical characteristics 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 2.5 4 mA

Standby current

(1)

. No input signal, V

= GND. 1 2 µA

STBY

Output offset voltage. Floating inputs, RL = 8 Ω 25 mV

Output power

2.3

1.4 3

1.75

0.12 %

P

o

THD + N

THD = 1% max, F = 1 kHz, RL = 4 Ω THD = 1% max, F = 1 kHz, R

= 8 Ω

L

THD = 10% max, F = 1 kHz, RL = 4 Ω THD = 10% max, F = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise

= 900 mW

P

o

, G = 6 dB, F= 1 kHz, RL = 8 Ω

RMS

Efficiency

PSRR

CMRR

Gain

Z

in

F

PWM

SNR

t

WU

t

STBY

Po = 2.3 W Po = 1.4 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

Common mode rejection ratio C

=1 µF, RL = 8 Ω

in

20 Hz < F< 20 kHz, Gain = 6 dB, ΔV

ripple

= 200 mV

ICM

= 200 mV

pp

Gain value, Gs = 0 V Gain value, GS = V

Single ended input impedance

CC

(3)

= 1 µF

IN

pp

(2)

11.5

86 92

68 65

60 dB

12612.5

5.5

6.5

68 75 82 kΩ

Pulse width modulator base frequency 190 280 370 kHz

Signal-to-noise ratio (A-weighting), F = 1 kHz, Po = 1.9 W G = 6 dB, R

= 4 Ω (with LC output filter)

L

93 dB

Wake-up time 1 3 ms

Standby time 1 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 measurement - 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 =217 Hz.

ripple

87 60 83 58

106

77

101

75

µV

W

%

dB

rms

6/28 Doc ID 14937 Rev 2

TS2007FC Electrical characteristics

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

= 8 Ω

L

= GND

23.3mA

0.85 2 µA

25 mV

Output power

1.6

0.95 2

1.2

0.09 %

P

o

THD + N

THD = 1% max, F = 1 kHz, R

= 4 Ω

L

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

L

THD = 10% max, F = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise Po = 600 mW

, G = 6 dB, F = 1 kHz, RL = 8 Ω

rms

= 4 Ω

Efficiency

PSRR

CMRR

= 1.6 W

P

o

Po = 0.95 W

Power supply rejection ratio with inputs grounded,

= 1 µF

C

in

F = 217 Hz, RL = 8 Ω, Gain = 6 dB, V F = 217 Hz, RL = 8 Ω, Gain = 12 dB, V 200 mV

Common mode rejection ratio C 20 Hz < F< 20 kHz, Gain = 6 dB, ΔV

, RL = 4 Ω (with LC output filter)

rms

, RL = 8 Ω (with LC output filter)

rms

(2)

pp

in

= 200 mV

ripple

=

ripple

= 1 µF, RL = 8 Ω,

= 200 mV

ICM

pp

86 92

68 65

60 dB

Gain value

Gain

Z

F

PWM

SNR

t

WU

t

STBY

IN

Gs = 0 V

= V

G

S

CC

Single ended input impedance

(3)

Pulse width modulator base frequency 190 280 370 kHz

Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 1.3 W G = 6 dB, R

= 4 Ω (with LC output filter)

L

Wake-up time 1 3 ms

Standby time 1 ms

11.5

5.5

12

12.5

6

6.5

68 75 82 kΩ

92 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. 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 = 217 Hz.

ripple

86 59 82 57

105

74

100

74

µV

W

%

dB

rms

Doc ID 14937 Rev 2 7/28

Electrical characteristics TS2007FC

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

= 8 Ω

L

= GND

1.7 3.1 mA

0.75 2 µA

25 mV

Output power

1.2

0.7

1.55

0.9

0.06 %

P

o

THD + N

THD = 1% max, F = 1 kHz, R

= 4 Ω

L

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

L

THD = 10% max, F = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise Po = 400 mW

, G = 6 dB, F = 1 kHz, RL = 8 Ω

rms

= 4 Ω

Efficiency

PSRR

CMRR

= 1.18 W

P

o

Po = 0.7 W

Power supply rejection ratio with inputs grounded,

= 1 µF

C

in

F = 217 Hz, RL = 8 Ω, Gain = 6 dB, V F = 217 Hz, RL = 8 Ω, Gain = 12 dB, V 200 mV

Common mode rejection ratio C 20 Hz < F< 20 kHz, Gain = 6 dB, ΔV

, RL = 4 Ω (with LC output filter)

rms

, RL = 8 Ω (with LC output filter)

rms

(2)

pp

in

= 200 mV

ripple

=

ripple

= 1 µF, RL = 8 Ω,

= 200 mV

ICM

86 92

pp

68 65

pp

60 dB

Gain value

Gain

Z

F

PWM

SNR

t

WU

t

STBY

in

Gs = 0 V

= V

G

S

CC

Single ended input impedance

(3)

Pulse width modulator base frequency 190 280 370 kHz

Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 0.9 W G = 6 dB, R

= 4 Ω (with LC output filter)

L

Wake-up time 1 3 ms

Standby time 1 ms

11.5

5.5

12

12.5

6

6.5

68 75 82 kΩ

90 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. 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= 217 Hz.

ripple

84 58 79 56

104

75 99 72

μV

W

%

dB

RMS

8/28 Doc ID 14937 Rev 2

TS2007FC Electrical characteristics

Table 8. VCC = +3.0 V, GND = 0 V, Vic = 1.5 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, R

= 8 Ω

L

= GND

1.5 2.9 mA

0.6 2 µA

25 mV

Output power

0.75

0.5 1

0.6

0.04 %

P

o

THD + N

THD = 1% max, F = 1 kHz, R

= 4 Ω

L

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

L

THD = 10% max, F = 1 kHz, RL = 8 Ω

Total harmonic distortion + noise Po = 300 mW

, G = 6 dB, F= 1 kHz, RL = 8 Ω

RMS

= 4 Ω

Efficiency

PSRR

CMRR

= 0.8 W

P

o

Po = 0.5 W

Power supply rejection ratio with inputs grounded,

= 1 µF

C

in

F = 217 Hz, RL = 8 Ω, Gain = 6 dB, V F = 217 Hz, RL = 8 Ω, Gain = 12 dB, V 200 mV

Common mode rejection ratio C 20 Hz < F< 20 kHz, Gain = 6 dB, ΔV

, RL = 4 Ω (with LC output filter)

rms

, RL = 8 Ω (with LC output filter)

rms

(2)

pp

in

= 200 mV

ripple

=

ripple

= 1 µF, RL = 8 Ω,

= 200 mV

ICM

85 91

pp

68 65

pp

60 dB

Gain value

Gain

Z

F

PWM

SNR

t

WU

t

STBY

in

Gs = 0 V

= V

G

S

CC

Single ended input impedance

(3)

Pulse width modulator base frequency 190 280 370 kHz

Signal-to-noise ratio (A-weighting), F=1 kHz, Po = 0.6 W G = 6 dB, R

= 4 Ω (with LC output filter)

L

Wake-up time 1 3 ms

Standby time 1 ms

11.5

5.5

12

12.5

6

6.5

68 75 82 kΩ

89 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. 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 = 217 Hz.

ripple

82 57 78 55

103

74 99 71

µV

W

%

dB

RMS

Doc ID 14937 Rev 2 9/28