ST TS419, TS421 User Manual

TS419 TS421

360mW MONO AMPLIFIER WITH STANDBY MODE

■OPERATING FROM Vcc=2V to 5.5V

■STANDBY MODE A CTIV E HIGH (TS419) or

LOW (TS421)

■OUTPUT POWER into 16Ω: 367mW @ 5V

with 10% THD+N max or 295mW @5V and 110mW @3.3V with 1% THD+N max.

■LOW CURRENT CONSUMPTION: 2.5mA max

■High Signal-to-Noise ratio: 95dB(A) at 5V

■PSRR: 56dB typ. at 1kHz, 46dB at 217Hz

■SHORT CIRCUIT LIMITATION

■ON/OFF click reduction circuitry

■Available in SO8, MiniSO8 & DFN 3x3

DESCRIPTION

The TS419/TS421 is a monaural audio power amplifier driving in BTL mode a 16 or 32Ω earpiece or receiver speaker. The main advantage of this configuration is to get rid of bulky ouput capacitors. Capable of descending to lo w voltages , it delivers up to 220mW per channel (into 16Ω loads) of continuous average power with 0.2% THD+N in the audio bandwidth from a 5V power supply. An externally controlled standby mode reduces the supply current to 10nA (typ.). The TS419/ TS421 can be configu red by external gain-setting resistors or used in a fixed gain version.

APPLICATIONS

■16/32 ohms earpiece or receiver speaker driver

■Mobile and cordless phones (analog / digital)

■PDAs & c o mpute r s

■Portable appliances

PIN CONNECTIONS (top view)

TS419IDT: SO8

TS419IST, TS419-xIST: MiniSO8

Standby

Bypass

V+

1 2 3

IN

4

V

IN-

TS419IQT, TS419-xIQT: DFN8

1

GND

VOUT 2

2

2 3

STANDBY

3

BYPASS V

4

TS421IDT: SO8

TS421IST, TS421-xIST: MiniSO8

8 7 6 5

8

8 7

7 6

6

5

V2

OUT

GND

CC

V V

OUT1

Vcc

OUT 1

V

VIN-

IN+

ORDER CODE

Part

Number

Temp.

Range:

I

TS419

TS421 TS419 TS419-2 tba tba x2/6dB K19B TS419-4 tba tba x4/12dB K19C TS419-8 tba tba x8/18dB K19D

-40, +85°C

TS421 TS421-2 tba tba x2/6dB K21B TS421-4 tba tba x4/12dB K21C TS421-8 tba tba x8/18dB K21D

MiniSO & DFN only available in Tape & Reel with T suffix. SO is available in Tube (D) and in Tape & Reel (DT)

June 2003

Package

DS Q

•

••

Gain Marking

external TS419I external TS421I external K19A

external K21A

TS421IQT, TS421-xIQT: DFN8

1

GND

VOUT 2

2

2 3

STANDBY

3

BYPASS V

4

8

Vcc

7

V

OUT 1

VIN-

6

IN+

5

1/32

TS419-TS421

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

R

Supply voltage

CC

V

Input Voltage

i

Storage Temperature -65 to +150 °C

stg

T

Maximum Junction Temperature 150 °C

j

Thermal Resistance Junction to Ambient

thja

SO8 MiniSO8 DFN8

Power Dissipation

Pd

SO8 MiniSO8 DFN8

ESD

Human Body Model (pin to pin): TS419

ESD Machine Model - 220pF - 240pF (pin to pin) 100 V

Latch-up Latch-up Immunity (All pins) 200 mA

Lead Temperature (soldering, 10sec ) 250 °C Output Short-Circuit to Vcc or GND

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

2. Pd has been calculated with Tamb = 25°C, Tjunction = 150°C.

3. TS419 stands 1.5KV on all pi ns except sta ndby pin which st ands 1KV.

4. Attention must be pai d to continou s power dissipat i on (V dramatically reduci ng product lif e expectan cy .

1)

-0.3V to V

6V

+0.3V

CC

175 215

70

2)

0.71

0.58

1.79

3)

, TS421

x 300mA). Exposure of the IC to a short circuit for an extended time period is

DD

1.5 kV

continous

4)

V

°C/W

W

OPERATING CONDITIONS

Symbol Parameter Value Unit

V

T

V

R

T

1. The minimum current consumption (I

2. Wh en m ounted on a 4-layer PCB

3. For more details on T

Supply Voltage 2 to 5.5 V

CC

R

Load Resistor ≥ 16

L

Operating Free Air Temperature Range -40 to + 85 °C

oper

Load Capacitor

= 16 to 100

C

ICM

L

R

L

R

> 100

L

Common Mode Input Voltage Range Standby Voltage Input

STB

TS421 ACTIVE / TS419 in STANDBY TS421 in STANDBY / TS419 ACTIVE

Ω

GND ≤ V

400 100

GND to V

1.5 ≤ V

STB

CC

≤ V

≤ 0.4

Thermal Resistance Junction to Ambient

THJA

wu Wake-up time from standby to active mode (Cb = 1µF)

SO8 MiniSO8

2)

DFN8

STANDBY

, please refer to application note section on Wak e-up time pag e 28.

WU

) is guaranteed at VCC (TS419) or GND (TS421) for the whole temperature range.

3)

150 190

41

0.12 s

≥

-1V

CC

1)

Ω

pF

V

°C/W

2/32

TS419-TS421

FIXED GAIN VERSION SPECIFIC ELECTRICAL CHARACTERISTI CS

V

from +5V to +2V, GND = 0V, T

CC

Symbol Parameter Min. Typ. Max. Unit

= 25°C (unless otherwise specified)

amb

R

Input Resistance 20 k

IN

Gain value for Gain TS419/TS421-2

G

Gain value for Gain TS419/TS421-4 Gain value for Gain TS419/TS421-8

APPLICATION COMPONENTS INFORMATION

Components Functional Description

Inverting input resistor which sets the closed loop gain in conjunction with R forms a high pass filter with C

(fcl = 1 / (2 x Pi x RIN x CIN)). Not needed in fixed gain versions.

IN

Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal Feedback resistor which sets the closed loop gain in conjunction with RIN.

= Closed Loop Gain= 2xR

A

V

FEED/RIN

. Not needed in fixed gain versions. Supply Bypass capacitor which provides power supply filtering. Bypass capacitor which provides half supply filtering.

R

IN

C

IN

FEED

C

S

C

B

TYPICAL APPLICATION SCHEMATICS:

6dB 12dB 18dB

. This resistor also

FEED

Ω

dB

3/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

= +5V, GND = 0V , T

V

CC

Symbol Parameter Min. Typ. Max. Unit

= 25°C (unless otherwise specified)

amb

I

CC

Supply Current

No input signal, no load 1.8 2.5 mA

Standby Current

I

STANDBY

No input signal, V No input signal, V

Voo

Output Offset Voltage

No input signal, RL = 16 or 32

Output Power

THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R

P

O

THD+N = 10% Max, F = 1kHz, R THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R THD+N = 10% Max, F = 1kHz, R

Total Harmonic Distortion + Noise (A

R

THD + N

PSRR

SNR

Φ

GM

GBP

SR

1. Guaranteed by design and evaluation.

Power Supply Rejection Ratio (A

Signal-to-Noise Ratio (Filter Type A, A (RL = 32

Phase Margin at Unity Gain

M

R Gain Margin

R Gain Bandwidth Product

R Slew Rate

R

= 32

L

R

= 16

L

F = 1kHz, Vripple = 200mVpp, input grounded, Cb=1µF

Ω,

= 16Ω, CL = 400pF

L

= 16Ω, CL = 400pF

L

= 16

L

= 16

L

P

Ω,

out

P

Ω,

out

THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)

Ω

STANDBY STANDBY

=GND for TS421 =Vcc for TS419

Rfeed=20k

Ω,

= 32

Ω

L

= 32

Ω

L

= 32

Ω

L

= 16

Ω

L

= 16

Ω

L

= 16

Ω

L

=2)

v

= 150mW, 20Hz ≤ F ≤ 20kHz = 220mW, 20Hz ≤ F ≤ 20kHz

1)

=2)

v

1)

=2)

v

10 1000 nA

Ω

525mV

190

166

207 258

mW

270

240

295 367

0.15

%

0.2

50 56 dB

85 98 dB

58 Degrees

18 dB

1.1 MHz

0.4 V/µS

4/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

V

= +3.3V, GND = 0V, T

CC

= 25°C (unless otherwise specified)

amb

Symbol Parameter Min. Typ. Max. Unit

1)

I

CC

Supply Current

No input signal, no load 1.8 2.5 mA

Standby Current

I

STANDBY

Voo

No input signal, V No input signal, V

STANDBY STANDBY

Output Offset Voltage

No input signal, RL = 16 or 32Ω, Rfeed=20k

=GND for TS421 =Vcc for TS419

Ω

Output Power

THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R

P

O

THD+N = 10% Max, F = 1kHz, R THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R THD+N = 10% Max, F = 1kHz, R

Total Harmonic Distortion + Noise (A

R

THD + N

PSRR

SNR

Φ

GM

GBP

SR

1. All electrical values are guaranted with correlation measurements at 2V and 5V

Power Supply Rejection Ratio

Signal-to-Noise Ratio (Weighted A, A (R

Phase Margin at Unity Gain

M

R Gain Margin

R Gain Bandwidth Product

R Slew Rate

R

= 32

L

R

= 16

L

inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF

= 32

Ω,

L

= 16Ω, CL = 400pF

L

= 16Ω, CL = 400pF

L

= 16

L

= 16

L

P

= 50mW, 20Hz ≤ F ≤ 20kHz

Ω,

out

P

= 70mW, 20Hz ≤ F ≤ 20kHz

Ω,

out

THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)

Ω

=2)

v

=2)

= 32

L

= 32

L

= 32

L

= 16

L

= 16

L

= 16

L

Ω Ω Ω Ω Ω

Ω

10 1000 nA

525mV

75

65

81

102

mW

104

91

113 143

0.15

%

0.2

50 56 dB

82 94 dB

58 Degrees

18 dB

1.1 MHz

0.4 V/µS

5/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

V

= +2.5V, GND = 0V, T

CC

= 25°C (unless otherwise specified)

amb

1)

Symbol Parameter Min. Typ. Max. Unit

I

CC

Supply Current

No input signal, no load 1.7 2.5 mA

Standby Current

I

STANDBY

Voo

No input signal, V No input signal, V

Output Offset Voltage

No input signal, RL = 16 or 32

STANDBY STANDBY

=GND for TS421 =Vcc for TS419

Rfeed=20k

Ω,

10 1000 nA

Ω

525mV

Output Power

THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R

P

O

THD+N = 10% Max, F = 1kHz, R THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R THD+N = 10% Max, F = 1kHz, R

Total Harmonic Distortion + Noise (A

R

THD + N

PSRR

SNR

Φ

GM

GBP

SR

1. All electrical values are guaranted with correlation measurements at 2V and 5V

Power Supply Rejection Ratio (A

Signal-to-Noise Ratio (Weighted A, A (R

Phase Margin at Unity Gain

M

R Gain Margin

R Gain Bandwidth Product

R Slew Rate

R

= 32

L

R

= 16

L

inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF

= 32

Ω,

L

= 16Ω, CL = 400pF

L

= 16Ω, CL = 400pF

L

= 16

L

= 16

L

P

= 30mW, 20Hz ≤ F ≤ 20kHz

Ω,

out

P

= 40mW, 20Hz ≤ F ≤ 20kHz

Ω,

out

=2)

v

THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)

Ω

=2)

v

=2)

= 32

L

= 32

L

= 32

L

= 16

L

= 16

L

= 16

L

Ω Ω

32

Ω Ω Ω

44

Ω

37 41 52 50 55 70

0.15

0.2

50 56 dB

80 91 dB

58 Degrees

18 dB

1.1 MHz

0.4 V/µS

mW

%

6/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

= +2V, GND = 0V, T

V

CC

Symbol Parameter Min. Typ. Max. Unit

= 25°C (unless otherwise specified)

amb

I

CC

Supply Current

No input signal, no load 1.7 2.5 mA

Standby Current

I

STANDBY

No input signal, V No input signal, V

Voo

Output Offset Voltage

No input signal, RL = 16 or 32

Output Power

THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R

P

O

THD+N = 10% Max, F = 1kHz, R THD+N = 0.1% Max, F = 1kHz, R THD+N = 1% Max, F = 1kHz, R THD+N = 10% Max, F = 1kHz, R

Total Harmonic Distortion + Noise (A

R

THD + N

PSRR

SNR

Φ

GM

GBP

SR

1. Guaranteed by design and evaluation.

Power Supply Rejection Ratio (A

Signal-to-Noise Ratio (Weighted A, A (RL = 32

Phase Margin at Unity Gain

M

R Gain Margin

R Gain Bandwidth Product

R Slew Rate

R

= 32

L

R

= 16

L

inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF

Ω,

= 16Ω, CL = 400pF

L

= 16Ω, CL = 400pF

L

= 16

L

= 16

L

P

Ω,

out

P

Ω,

out

THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)

Ω

STANDBY STANDBY

=GND for TS421 =Vcc for TS419

Rfeed=20k

Ω,

= 32

Ω

L

= 32

Ω

L

= 32

Ω

L

= 16

Ω

L

= 16

Ω

L

= 16

Ω

L

=2)

v

= 13mW, 20Hz ≤ F ≤ 20kHz = 20mW, 20Hz ≤ F ≤ 20kHz

1)

=2)

v

1)

=2)

v

10 1000 nA

Ω

525mV

20

19

23 30

mW

26

24

30 40

0.1

%

0.15

49 54 dB

80 89 dB

58 Degrees

20 dB

1.1 MHz

0.4 V/µS

7/32

TS419-TS421

Index of Graphs

Description Figure Page

Common Curves

Open Loop Gain and Phase vs Frequency 1 to 12 9 to 10 Current Consumption vs Power Supply Voltage 13 11 Current Consumption vs Standby Voltage 14 to 19 11 to 12 Output Power vs Power Supply Voltage 20 to 23 12 Output Power vs Load Resistor 24 to 27 12 to 13 Power Dissipation vs Output Power 28 to 31 13 to 14 Power Derating vs Ambiant Temperature 32 14 Output Voltage Swing vs Supply Voltage 33 14 Low Frequency Cut Off vs Input Capacitor 34 14

Curves With 6dB Gain Setting (Av=2)

THD + N vs Output Power 35 to 43 15 to 16 THD + N vs Frequency 44 to 46 16 Signal to Noise Ratio vs Power Supply Voltage 47 to 48 17 Noise Floor 49 to 50 17 PSRR vs Frequency 51 to 55 17 to 18

Curves With 12dB Gain Setting (Av=4)

THD + N vs Output Power 56 to 64 19 to 20 THD + N vs Frequency 65 to 67 20 Signal to Noise Ratio vs Power Supply Voltage 68 to 69 21 Noise Floor 70 to 71 21 PSRR vs Frequency 72 to 76 21 to 22

Curves With 18dB Gain Setting (Av=8)

THD + N vs Output Power 77 to 85 23 to 24 THD + N vs Frequency 86 to 88 24 Signal to Noise Ratio vs Power Supply Voltage 89 to 90 25 Noise Floor 91 to 92 25 PSRR vs Frequency 93 to 97 25 to 26

Note : All measurements made with Rin=20kΩ, Cb=1µF, and Cin=10µF unless otherwise specified.

8/32

TS419-TS421

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V RL = 8

Ω

Tamb = 25°C

Gain

Phase

Phase (Deg)

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V ZL = 8Ω+400pF Tamb = 25°C

Gain

Phase

Phase (Deg)

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V RL = 16

Ω

Tamb = 25°C

Gain

Phase

Phase (Deg)

Fig. 1: Open Loop Gain and Phase vs Frequency

80

Phase

Gain

Frequency (kHz)

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

Vcc = 5V RL = 8

Ω

Tamb = 25°C

Fig. 3: Open Loop Gain and Phase vs Frequency

Vcc = 5V ZL = 8Ω+400pF Tamb = 25°C

80

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

Gain

Phase

Frequency (kHz)

180 160 140 120 100 80 60 40 20 0

-20

180 160 140 120 100 80 60 40 20 0

-20

Fig. 2: Open Loop Gain and Phase vs Frequency

Phase (Deg)

Fig. 4: Open Loop Gain and Phase vs Frequency

Phase (Deg)

Fig. 5: Open Loop Gain and Phase vs Frequency

80

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

Gain

Phase

Frequency (kHz)

Fig. 6: Open Loop Gain and Phase vs Frequency

Vcc = 5V RL = 16 Tamb = 25°C

180 160

Ω

140 120 100 80 60

Phase (Deg)

40 20 0

-20

9/32

TS419-TS421

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V ZL = 16Ω+400pF Tamb = 25°C

Gain

Phase

Phase (Deg)

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V RL = 32

Ω

Tamb = 25°C

Gain

Phase

Phase (Deg)

0.1 1 10 100 1000 10000

-40

-20

0

20

40

60

80

-20

0

20

40

60

80

100

120

140

160

180

Gain (dB)

Frequency (kHz)

Vcc = 2V ZL = 32Ω+400pF Tamb = 25°C

Gain

Phase

Phase (Deg)

Fig. 7: Open Loop Gain and Phase vs Frequency

Vcc = 5V ZL = 16Ω+400pF Tamb = 25°C

80

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

Gain

Phase

Frequency (kHz)

Fig. 9: Open Loop Gain and Phase vs Frequency

80

Phase

Gain

Frequency (kHz)

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

Vcc = 5V RL = 32

Ω

Tamb = 25°C

180 160 140 120 100 80 60 40 20 0

-20

180 160 140 120 100 80 60 40 20 0

-20

Fig. 8: Open Loop Gain and Phase vs Frequency

Phase (Deg)

Fig. 10: Open Loop Gain and Phase vs Frequency

Phase (Deg)

Fig. 11: Open Loop Gain and Phase vs Frequency

80

60

40

20

Gain (dB)

0

-20

-40

0.1 1 10 100 1000 10000

10/32

Gain

Phase

Frequency (kHz)

Fig. 12: Open Loop Gain and Phase vs Frequency

Vcc = 5V ZL = 32Ω+400pF Tamb = 25°C

180 160 140 120 100 80 60 40 20 0

-20

Phase (Deg)