ST TS4999 User Manual

TS4999

Filter-free stereo 2.8 W class D audio power amplifier

with selectable 3D sound effects

Features

■ Operates from V

■ Dedicated standby mode active low/channel

■ Output power per channel: 2.8 W at 5 V into

4 Ω with 10% THD+N or 0.7 W at 3.6 V into 8 Ω with 1% THD+N max.

■ Selectable 3D sound effect

■ Four gain setting steps: 3.5, 6, 9.5 and 12 dB

■ Low current consumption

■ PSSR: 63 dB typical at 217 Hz.

■ Fast start up phase: 7.8 ms

■ Short-circuit and thermal shutdown protection

■ Flip chip 18-bump lead-free package

= 2.4 to 5.5 V

CC

Applications

■ Cellular phones

■ PDAs

■ Notebook PCs

Flip chip 18-bump package

Pin connections (top view)

LOUT-

LOUT+

STDBYL

LPVCC

AGND

LIN- RIN-

PGND

G1

G0

RPVCC

AVCC

ROUT-

ROUT+

STDBYR

RIN+3D

Description

LIN+

RIN+3D

The TS4999 is a stereo fully-differential class D power amplifier. It can drive up to 1.35 W into a 8 Ω load at 5 V per channel. The device has four different gain settings utilizing two discrete pins, G0 and G1.

Pop and click reduction circuitry provides low on/off switch noise while allowing the device to start within 8 ms. 3D enhancement effects are selected through one digital input pin that allows more amazing stereo audio sound.

Two standby pins (active low) allow each channel to be switched off separately.

The TS4999 is available in a flip chip, 18-bump, lead-free package.

December 2008 Rev 1 1/36

www.st.com

36

Contents TS4999

Contents

1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.1 Electrical characteristic curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.1 Differential configuration principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.2 Gain settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.3 3D effect enhancement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.4 Low frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.5 Circuit decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.6 Wakeup (t

4.7 Consumption in shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.8 Single-ended input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.9 Output filter considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.10 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.11 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

) and shutdown (t

WU

) times . . . . . . . . . . . . . . . . . . . . . . . 26

STBY

5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.1 Flip chip package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

5.2 Tape and reel package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

6 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2/36

TS4999 Absolute maximum ratings

1 Absolute maximum ratings

Table 1. Key parameters and their absolute maximum ratings

Symbol Parameter Value Unit

(2)

(1)

(6)

(5)

(3)

6V

GND to V

CC

200 °C/W

Internally Limited

2kV

200 V

(4)

V

T

R

V

oper

Supply voltage

CC

Input voltage

in

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

Storage temperature -65 to +150 °C

stg

T

Maximum junction temperature 150 °C

j

Thermal resistance junction to ambient

thja

Pd Power dissipation

ESD

HBM: human body model

MM: machine model

Latch-up Latch-up immunity 200 mA

V

STBY

Standby pin voltage maximum voltage

GND to V

CC

Lead temperature (soldering, 10 secs) 260 °C

Output short-circuit protection

1. All voltages 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. Device is protected in case of over temperature by a thermal shutdown active at 150° C.

4. Exceeding the power derating curves during a long period, involves abnormal operating condition.

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 capacitor 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 of each channel and between outputs and ground.

(7)

V

3/36

Absolute maximum ratings TS4999

Table 2. Operating conditions

Symbol Parameter Value Unit

V

Supply voltage

CC

Input voltage range GND to V

in

Standby voltage input

VSTBY

Device ON Device OFF

RL Load resistor

VIH G0, G1, 3D, High Level Input Voltage

VIL G0, G1, 3D, Low Level Input Voltage GND

R

1. For VCC from 2.4 to 2.5 V, the operating temperature range is reduced to 0° C ≤ T

2. Without any signal on V

3. Minimum current consumption is obtained when V

4. Between G0, G1, 3D pins and GND, there is an internal 300 kΩ (+/-20 %) pull-down resistor. When pins are floating, the gain is 3.5 dB and 3D effect is off. In full standby (left and right channels OFF), these resistors are disconnected (HiZ input).

5. With a 4-layer PCB.

Table 3. 3D effect pin and STANDBY pins setting truth table

Thermal Resistance Junction to Ambient

thja

(1)

(2)

(4)

(5)

, the device will be in standby (internal 300 kΩ (+/-20 %) pull down resistor)

STBY

= GND

STBY

2.4 to 5.5 V

1.4 ≤ V

GND ≤ V

≤ VCC

STBY

≤ 0.4

STBY

≥4 Ω

1.4 ≤ VIH ≤ VCC V

≤ VIL ≤ 0.4 V

90 °C/W

≤70° C

amb

CC

V

(3)

3D STBYL STBYR 3D Effect Left channel Right channel

0 0 0 X STDBY STDBY

001OFFSTDBYON

010OFFONSTDBY

011OFFONON

1 0 0 X STDBY STDBY

1 0 1 N/A N/A N/A

1 1 0 N/A N/A N/A

1 1 1 ON ON ON

Note: When the 3D effect is switched on, both channels must be in operation or in shutdown mode

at the same time.

4/36

TS4999 Application information

2 Application information

Figure 1. Typical application schematic

Differential Left Input

Left IN+

Left IN-

Differential Right Input

Right IN+

Right IN-

Cs

VCC VCC

0.1uF

Gain

3D Effect

Control

C13D

D4

AVCC

Oscillator

Gain Select

Control

TS49 99

Cin

Lin+

A1

Select

Lin-

B2

G0

C3

C5

G1

RPVCC

PWM

CsR 1uF

D6

VCC

LPVCC

H

Bridge

CsL 1uF

B6

Lout+

A5

A7

Lout-

Left speaker

3D EFFECT

E1

Rin+

Cin

D2

A3

E3

Gain

Select

Rin-

STBYL

STBYR

Standby Control

Standby

Control

PWM

Protection

Circuit

B4

H

Bridge

PGNDAGND

C7

Rout+

Rout-

E5

E7

Right speaker

Note: See Section 4.9: Output filter considerations on page 29.

Table 4. External component description

Components Functional description

, CSL, C

C

S

C

in

Supply capacitor that provides power supply filtering.

SR

Input coupling capacitors that block the DC voltage at the amplifier input terminal. The capacitors also form a high pass filter with Z (Fcl = 1 / (2 x π x Zin x Cin)). Note that the value of Z

These coupling capacitors are mandatory.

5/36

in

changes with each gain setting.

in

Application information TS4999

Table 5. Pin description

Bump Name Function

A1 LIN+ Left channel positive differential input

B2 LIN- Left channel negative differential input

C1 3D 3D effect digital input pin

E1 RIN+ Right channel positive differential input

D2 RIN- Right channel negative differential input

A3 STBYL Standby input pin (active low) for left channel output

C3 G0 Gain select input pin (LSB)

E3 STBYR Standby input pin (active low) for right channel output

B4 AGND Analog ground

D4 AVCC Analog supply voltage

A5 LOUT+ Left channel negative output

C5 G1 Gain select input pin (MSB)

E5 ROUT+ Right channel positive output

B6 LPVCC Left channel power supply voltage

D6 RPVCC Right channel power supply voltage

A7 LOUT- Left channel negative output

C7 PGND Power ground

E7 ROUT- Right channel negative output

Table 6. Truth table for output gain settings

G1 G0 Gain value (dB)

0 0 3.5

01 6

10 9.5

11 12

Note: See Table 3 on page 4.

Table 7. Truth table for 3D effects pin settings

3D 3D effect

0OFF

1ON

6/36

TS4999 Electrical characteristics

3 Electrical characteristics

Table 8. VCC = +5 V, GND = 0 V, T

.

= 25° C (unless otherwise specified)

amb

Symbol Parameter Conditions Min. Typ. Max. Unit

I

STANDBY

Voo Output offset voltage

Supply current No input signal, no load, both channels 5 7 mA

CC

Standby current No input signal, Vstdby = GND 1 2 μA

Floating inputs, RL = 8Ω, G = 3.5dB, 3D effect off

20 mV

THD = 1% max, F = 1kHz, RL = 4Ω 2.25

Po Output power

THD+N

Total harmonic distortion + noise

Efficiency Efficiency per channel

PSRR

Power supply rejection ratio with inputs grounded

Crosstalk Channel separation

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

THD = 10% max, F = 1kHz, R

Po = 0.9W/Ch, G = 6dB, F=1kHz,

= 8Ω

R

L

Po = 2.3 W

Po = 1.4 W

= 1µF

C

in

, RL = 4Ω +15µH 82

RMS

, RL = 8Ω + 15µH 89

RMS

(1)

,3D effects off

F = 217Hz, RL = 8Ω, gain = 6dB, Vripple = 200mVpp, Inputs grounded

F = 1kHz, R

= 8Ω,

L

3D effects off

= 8Ω 1.35

L

= 4Ω 2.8 W

L

= 8Ω 1.7 W

L

0.2 %

65 dB

100 dB

W

%

CMRR

Common mode rejection ratio

Gain Gain value with no load

Single-ended input

IN

impedance referred to GND

Pulse width modulator base frequency

F

Z

PWM

SNR Signal to noise ratio

t

WU

Wake-up time Total wake-up time

C

=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,

in

ΔVIC = 200mVpp, 3D effects OFF

57 dB

G1 = G0 = "0" 3 3.5 4

G1 = "0" & G0 = "1" 5.5 6 6.5

dB

G1 = "1" & G0 = "0" 9 9.5 10

G1 = G0 = "1" 11.5 12 12.5

G1 = G0 = 3D = "0" or G1 = "0" & G0 = "1" & 3D = "0" or

24 30 36 kΩ

G1 = "1" & G0 = "0" & 3D = "0"

G1 = "1" & G0 = "1" & 3D = "0" 12 15 18 kΩ

G1 = G0 = "0" & 3D = "1" or G1 = "0" & G0 = "1" & 3D = "1" or

13.5 17.1 20.5 kΩ

G1 = "1" & G0 = "0" & 3D = "1"

G1 = "1" & G0 = "1" & G3D = "1" 6.5 8.6 10.5

190 280 370 kHz

= 1.3W, A-weighting, RL = 8Ω,

P

o

Gain = 6dB, 3D effects OFF

(2)

99 dB

9 13 16.5 ms

7/36

Electrical characteristics TS4999

Table 8. VCC = +5 V, GND = 0 V, T

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

amb

Symbol Parameter Conditions Min. Typ. Max. Unit

t

STBY

Standby time Standby time

(2)

11 15.8 20 ms

F = 20Hz to 20kHz, A-weighted, Gain = 3.5dB Filterless, 3D effect off, R Filterless, 3D effect on, RL = 4Ω

V

Output voltage noise

N

With LC output filter, 3D effect off, R With LC output filter, 3D effect on, RL = 4Ω Filterless, 3D effect off, RL = 8Ω Filterless, 3D effect on, R With LC output filter, 3D effect off, RL = 8Ω With LC output filter, 3D effect on, RL = 8Ω

1. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the super-imposed sinus signal to VCC at f = 217 Hz with fixed Cin cap (input decoupling capacitor).

2. See Section 4.6: Wakeup (t

) and shutdown (t

WU

) times on page 26.

STBY

= 4Ω

L

= 8Ω

L

= 4Ω

L

31 50 30 48 32 51 31 50

μV

RMS

8/36

TS4999 Electrical characteristics

Table 9. VCC = +3.6V, GND = 0V, T

.

= 25°C (unless otherwise specified)

amb

Symbol Parameter Conditions Min. Typ. Max. Unit

I

STANDBY

Voo Output offset voltage

Po Output power

THD+N

Efficiency Efficiency per channel

PSRR

Crosstalk Channel separation

CMRR

Supply current No input signal, no load, both channels 3.5 5.5 mA

CC

Standby current No input signal, Vstdby = GND 1 2 μA

Floating inputs, RL = 8Ω, G = 3.5dB, 3D effect off

= 4Ω 1.15

L

= 8Ω 0.7

L

= 4Ω 1.45 W

L

= 8Ω 0.86 W

L

0.15 %

64 dB

102 dB

55 dB

Total harmonic distortion + noise

Power supply rejection ratio with inputs grounded

Common mode rejection ratio

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

THD = 10% max, F = 1kHz, R

Po = 0.45W/Ch, G = 6dB, F=1kHz,

= 8Ω

R

L

Po = 1.15 W

Po = 0.7 W

= 1µF

C

in

F = 217Hz, R

, RL = 4Ω +15µH 82

RMS

, RL = 8Ω + 15µH 89

RMS

(1)

,3D effects off

= 8Ω, gain = 6dB,

L

Vripple = 200mVpp, inputs grounded

F = 1kHz, R

= 8Ω,

L

3D effects off

=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,

C

in

ΔVIC = 200mVpp, 3D effects off

20 mV

W

%

Gain Gain value with no load

Single-ended input

IN

impedance referred to GND

Pulse width modulator base frequency

F

Z

PWM

SNR Signal to noise ratio

t

WU

Wake-up time Total wake-up time

G1 = G0 = "0" 3 3.5 4

G1 = "0" & G0 = "1" 5.5 6 6.5

dB

G1 = "1" & G0 = "0" 9 9.5 10

G1 = G0 = "1" 11.5 12 12.5

G1 = G0 = 3D = "0" or G1 = "0" & G0 = "1" & 3D = "0" or

24 30 36 kΩ

G1 = "1" & G0 = "0" & 3D = "0"

G1 = "1" & G0 = "1" & 3D = "0" 12 15 18 kΩ

G1 = G0 = "0" & 3D = "1" or G1 = "0" & G0 = "1" & 3D = "1" or

13.5 17.1 20.5 kΩ

G1 = "1" & G0 = "0" & 3D = "1"

G1 = "1" & G0 = "1" & G3D = "1" 6.5 8.6 10.5 kΩ

190 280 370 kHz

P

= 0.67W, A-weighting, RL = 8Ω,

o

Gain = 6dB, 3D effects OFF

(2)

97 dB

7.5 11.3 15 ms

9/36

Electrical characteristics TS4999

Table 9. VCC = +3.6V, GND = 0V, T

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

amb

Symbol Parameter Conditions Min. Typ. Max. Unit

t

STBY

Standby time Standby time

(2)

10 13.8 18 ms

F = 20Hz to 20kHz, A-Weighted, Gain = 3.5dB Filterless, 3D effect off, R Filterless, 3D effect on, RL = 4Ω

V

Output voltage noise

N

With LC output filter, 3D effect off, R With LC output filter, 3D effect on, RL = 4Ω Filterless, 3D effect off, RL = 8Ω Filterless, 3D effect on, R With LC output filter, 3D effect off, RL = 8Ω With LC output filter, 3D effect on, RL = 8Ω

1. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the super-imposed sinus signal to VCC at f = 217 Hz with fixed Cin cap (input decoupling capacitor).

2. See Section 4.6: Wakeup (t

) and shutdown (t

WU

) times on page 26.

STBY

= 4Ω

L

= 8Ω

L

= 4Ω

L

29 49 28 48 29 50 29 50

μV

RMS

10/36

TS4999 Electrical characteristics

Table 10. VCC = +2.5 V, GND = 0V, T

= 25° C (unless otherwise specified)

amb

Symbol Parameter Conditions Min. Typ. Max. Unit

I

STANDBY

Voo Output offset voltage

Po Output power

THD+N

Efficiency Efficiency per channel

PSRR

Crosstalk Channel separation

CMRR

Supply current No input signal, no load, both channels 2.8 4 mA

CC

Standby current No input signal, Vstdby = GND 1 2 μA

Floating inputs, RL = 8Ω, G = 3.5dB, 3D effect off

= 4Ω 0.53

L

= 8Ω 0.33

L

= 4Ω 0.67 W

L

= 8Ω 0.4 W

L

0.07 %

63 dB

104 dB

55 dB

Total harmonic distortion + noise

Power supply rejection ratio with inputs grounded

Common mode rejection ratio

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

THD = 10% max, F = 1kHz, R

Po = 0.2W/Ch, G = 6dB, F=1kHz,

= 8Ω

R

L

Po = 0.52 W

Po = 0.33 W

= 1µF

C

in

F = 217Hz, R

, RL = 4Ω +15µH 81

RMS

, RL = 8Ω + 15µH 88

RMS

(1)

,3D effects off

= 8Ω, gain = 6dB,

L

Vripple = 200mVpp, Inputs grounded

F = 1kHz, R

= 8Ω,

L

3D effects off

=1µF, F = 217Hz, RL = 8Ω, gain = 6dB,

C

in

ΔVIC = 200mVpp, 3D effects off

20 mV

W

%

Gain Gain value with no load

Single-ended input

IN

impedance referred to GND

Pulse width modulator base frequency

F

Z

PWM

SNR Signal to noise ratio

t

WU

Wake-up time Total wake-up time

G1 = G0 = "0" 3 3.5 4

G1 = "0" & G0 = "1" 5.5 6 6.5

dB

G1 = "1" & G0 = "0" 9 9.5 10

G1 = G0 = "1" 11.5 12 12.5

G1 = G0 = 3D = "0" or G1 = "0" & G0 = "1" & 3D = "0" or

24 30 36 kΩ

G1 = "1" & G0 = "0" & 3D = "0"

G1 = "1" & G0 = "1" & 3D = "0" 12 15 18 kΩ

G1 = G0 = "0" & 3D = "1" or G1 = "0" & G0 = "1" & 3D = "1" or

13.5 17.1 20.5 kΩ

G1 = "1" & G0 = "0" & 3D = "1"

G1 = "1" & G0 = "1" & G3D = "1" 6.5 8.6 10.5 kΩ

190 280 370 kHz

P

= 0.3W, A-weighting, RL = 8Ω,

o

Gain = 6dB, 3D effects OFF

(2)

94 dB

37.812ms

11/36