ANPEC APA2020RI-TU, APA2020RI-TR, APA2020KI-TY, APA2020KI-TU, APA2020KI-TR Datasheet

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APA2020

Stereo 2-W Audio Power Amplifier

Features

Depop Circuitry Integrated

Thermal Shutdown Circuitry Integrated

Output Power at 1% THD+N, VDD=5V

-

1.8 W/Ch (typ) into a 4 Ω

Load

-

1.2 W/Ch (typ) into a 8 Ω

Load

Bridge-Tied Load (BTL) or Single-Ended (SE) Modes Operation

Various 24-Pin Power Packages Available SOP, TSSOP-P

Shutdown Control Mode , IDD= 0.5µA

Applications

Stereo Audio Power Amplifier for Notebook Computer

General Description

The APA2020 is a stereo bridge-tied audio power amplifier in various 24-pin power packages , including SOP , TSSOP-P. When connecting to a 5V voltage supply , the APA2020 is capable of delivering 1.8W/ 1.2W of continuous RMS power per channel into 4Ω/ 8Ω loads with less than 1% THD+N , respectively. The APA2020 simplifies design and frees up board space for other features.

The APA2020 also served well in low-voltage applications , which provides 800-mW per channel into 4Ω loads with a 3.3V supply voltage. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in the APA2020 , that reduces pops and clicks noise during power up and when using the shutdown or mute modes and protects the chip from being destroyed by over-temperature failure.

To simplify the audio system design in notebook computer applications , the APA2020 combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo single-end (SE) mode for headphone drive into a single chip , where both modes are easily switched by the SE/BTL input control pin signal. For power sensitive applications , the APA2020 also features a shutdown function which keeps the supply current only 0.5 µA (typ).

Ordering Information

APA2020

 

 

 

 

 

 

Package Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Handling Code

K : SOP

R : TSSOP-P *

 

 

 

 

 

 

 

 

 

 

 

 

Temp. Range

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Temp. Range

°C

 

 

 

 

 

 

 

 

 

 

 

 

I: - 40 to 85

 

 

 

 

 

 

 

 

 

 

 

 

Package Code

 

 

 

 

 

 

 

 

 

 

 

 

Handling Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TU : Tube

TR : Tape & Reel

 

 

 

 

 

 

 

 

 

 

 

 

 

TY : Tray

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* TSSOP-P is a standard TSSOP package with a thermal pad exposure on the bottom of the package.

ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders.

Copyright ANPEC Electronics Corp.

1

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

APA2020

Block Diagram

MUX

 

MUX

 

MUX

SE/BTL

Absolute Maximum Ratings

(Over operating free-air temperature range unless otherwise noted.)

Symbol

Parameter

Rating

Unit

VCC

Supply Voltage

6

V

TA

Operating Ambient Temperature Range

-40 to 85

° C

TJ

Maximum Junction Temperature

150

° C

TSTG

Storage Temperature Range

-65 to +150

° C

TS

Soldering Temperature,10 seconds

300

° C

VESD

Electrostatic Discharge

-3000 to 3000 *1

V

 

 

-200 to 200 *2

 

Note: 1. Human body model : C=100pF , R=1500Ω , 3 positive pulses plus 3 negative pulses

 

2. Machine model

: C=200pF , L=0.5mH , R=0Ω , 3 positive pulses plus 3 negative pulses

 

Copyright ANPEC Electronics Corp.

2

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

APA2020

Recommended Operating Conditions

 

 

 

Min.

Typ.

Max.

Unit

 

 

 

 

 

 

 

Supply Voltage, VDD

 

3

5

5.5

V

Operating free-air

VDD=5V,

4-Ω stereo BTL drive,

-20

 

85

 

250mW/Ch average power,

with proper PCB

 

° C

temperature, TA

 

design

 

 

 

 

 

VDD=5V,

3-Ω stereo BTL drive,

-20

 

85

 

 

2 W/Ch average power,

with proper PCB design

 

 

 

 

and 300 CFM

 

 

 

 

 

 

forced-air cooling

 

 

 

 

Common mode

VDD=5 V

 

1.25

 

4.5

 

input voltage, VICM

 

 

 

 

 

V

VDD=3.3V

 

1.25

 

2.7

Electrical Characteristics (Cont.)

AC Operating Characteristics , VDD= 5V , TA= 25°C , RL= 4Ω (unless otherwise noted)

Symbol

Parameter

Test Condition

APA2020

Unit

Min.

Typ.

Max.

P(out)

Output power (each channel )

THD = 10% , BTL , RL=4Ω

 

2.3

 

 

 

see Note 1

RL=8Ω

 

1.5

 

 

 

 

 

 

W

 

 

THD = 1% , BTL , RL=4Ω

 

1.8

 

 

 

 

 

 

 

 

RL=8Ω

 

1.2

 

 

 

 

THD = 10% , SE , RL=4Ω

 

650

 

 

 

 

RL=8Ω

 

400

 

 

 

 

THD = 1% , SE , RL=4Ω

 

500

 

mW

 

 

RL=8Ω

 

320

 

 

 

 

THD = 0.5% , SE , RL=32 Ω

 

90

 

 

THD + N

Total harmonic distortion plus

PO = 1.6W , BTL , RL=4Ω

 

300

 

 

 

noise

PO = 1W , BTL , RL=8Ω

 

150

 

 

 

 

 

 

m%

 

 

PO = 78mW , SE ,RL=32Ω

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V1 = 1V , RL=4Ω , G = 1

 

10

 

 

BOM

Maximum output power

G = 10 , THD < 1%

 

>20

 

KHz

bandwidth

 

 

 

 

 

 

 

 

 

 

Phase margin

RL = 4Ω , BTL

 

72

 

 

 

 

RL = 4Ω , Open Load

 

71

 

°

 

 

RL = 4Ω , SE

 

52

 

 

Notes 1 : Output power is meaured at the output teminals of the IC at 1 KHz.

Copyright ANPEC Electronics Corp.

3

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

APA2020

Electrical Characteristics (Cont.)

AC Operating Characteristics , VDD= 5V , TA= 25°C , RL= 4Ω (unless otherwise noted)

Symbol

Parameter

Test Condition

 

APA2020

Unit

Min.

 

Typ.

Max.

 

 

 

 

 

PSRR

Power supply ripple rejection

f =100 Hz

 

 

80

 

dB

 

Mute attenuation

 

 

 

85

 

dB

 

Channel-to-channel output

 

 

 

85

 

dB

 

separation

 

 

 

 

 

 

 

 

 

 

 

 

Line HP input separation

 

 

 

75

 

dB

 

BTL attenuation in SE mode

 

 

 

80

 

dB

ZI

Input impedance

 

 

 

2

 

MW

 

Signal-to-noise ratio

Po = 500 mW , BTL

 

 

90

 

dB

Vn

Output noise voltage

 

 

 

80

 

μV(rms)

Notes 1 : Output power is meaured at the output teminals of the IC at 1 KHz.

Electrical Characteristics (Cont.)

AC Operating Characteristics , VDD= 5V , TA= 25°C , RL= 4Ω (unless otherwise noted)

Symbol

Parameter

Test Condition

APA2020

Unit

Min.

Typ.

Max.

P(out)

Output power (each channel )

THD = 10% , BTL , RL=4Ω

 

1

 

 

 

see Note 2

RL=8Ω

 

0.6

 

 

 

 

 

 

W

 

 

THD = 1% , BTL , RL=4Ω

 

0.8

 

 

 

 

 

 

 

 

RL=8Ω

 

0.5

 

 

 

 

THD = 10% , SE , RL=4Ω

 

290

 

 

 

 

RL=8Ω

 

180

 

 

 

 

THD = 1% , SE , RL=4Ω

 

230

 

mW

 

 

RL=8Ω

 

140

 

 

 

 

THD = 0.5% , SE , RL=32 Ω

 

43

 

 

THD + N

Total harmonic distortion plus

PO = 1.6W , BTL , RL=4Ω

 

270

 

 

 

noise

PO = 1W , BTL , RL=8Ω

 

150

 

 

 

 

 

 

m%

 

 

PO = 78mW , SE ,RL=32Ω

 

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V1 = 1V , RL=4Ω , G = 1

 

10

 

 

BOM

Maximum output power

G = 10 , THD < 1%

 

>20

 

KHz

bandwidth

 

 

 

 

 

 

 

 

 

Phase margin

RL = 4Ω , BTL

 

92

 

 

 

 

RL = 4Ω , Open Load

 

70

 

°

 

 

RL = 4Ω , SE

 

57

 

 

Notes 2 : Output power is meaured at the output teminals of the IC at 1 KHz.

Copyright ANPEC Electronics Corp.

4

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

APA2020

Electrical Characteristics (Cont.)

AC Operating Characteristics , VDD= 5V , TA= 25°C , RL= 4Ω (unless otherwise noted)

Symbol

Parameter

Test Condition

 

APA2020

Unit

Min.

 

Typ.

Max.

 

 

 

 

 

PSRR

Power supply ripple rejection

f =100 Hz

 

 

70

 

dB

 

Mute attenuation

 

 

 

85

 

dB

 

Channel-to-channel output

f =1 KHz

 

 

85

 

dB

 

separation

 

 

 

 

 

 

 

 

 

 

 

 

Line HP input separation

 

 

 

75

 

dB

 

BTL attenuation in SE mode

 

 

 

80

 

dB

ZI

Input impedance

 

 

 

2

 

MW

 

Signal-to-noise ratio

Po = 500 mW , BTL

 

 

90

 

dB

Vn

Output noise voltage

 

 

 

50

 

μV(rms)

Notes 2 : Output power is meaured at the output teminals of the IC at 1 KHz.

DC Electrical Characteristic , TA=25 °C

Symbol

Parameter

 

Test Conditions

APA2020

Unit

 

 

 

 

 

Typ.

Max.

 

IDD

Supply Current

V DD

= 5V

Stereo BTL

8

11

mA

 

 

Stereo SE

4

6.5

mA

 

 

V DD

= 3.3 V

Stereo BTL

7

9

mA

 

 

 

 

Stereo SE

3.5

5.6

mA

VO (DIFF)

DC Differential Output

V DD =5V, Gain

= 2, see Note3

5

25

mV

 

Voltage

 

 

 

 

 

 

IDD(MUTE)

Supply Current in Mute Mode

V DD

= 5V

 

8

11

mA

ISD

IDD in Shutdown

V DD

= 5V

 

0.5

5

A

Note 3 : at 3V<VDD<5V , the DC output voltage is approximately VDD / 2.

Copyright ANPEC Electronics Corp.

5

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

APA2020

Pin Description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND/HS

 

 

 

1

24

 

 

 

GND/HS

 

 

 

 

 

 

 

 

 

 

 

 

TJ

 

 

 

 

2

23

 

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LOUT+

 

 

 

3

22

 

 

 

ROUT+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LLINEIN

 

 

 

 

4

21

 

 

 

RLINEIN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LHPIN

 

 

 

 

5

20

 

 

 

RHPIN

 

 

 

 

Thermal

 

 

 

LBYPASS

 

 

 

 

6

19

 

 

 

RBYPASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LVDD

 

 

 

 

7

18

 

 

 

RVDD

 

 

 

 

 

Pad

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHUTDOWN

 

 

 

 

8

17

 

 

 

NC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUTE OUT

 

 

9

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HP/LINE

 

 

 

 

 

 

 

 

 

 

 

 

 

LOUT-

 

 

 

 

10

15

 

 

 

ROUT-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MUTE IN

 

 

 

 

11

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SE/BTL

 

 

 

 

 

 

 

 

 

GND/HS

 

 

 

 

12

13

 

 

 

GND/HS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Top View

Bottom View

 

 

 

 

 

For SOP and TSSOP-P

For TSSOP-P Only

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

I/O

Description

 

 

 

 

 

 

 

 

 

 

 

 

 

Name

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND/HS

1,12,

 

Ground connection for circuitry, directly connected to thermal pad

 

 

 

 

 

13,24

 

(only in TSSOP-P package).

 

 

 

TJ

2

O

Shutdown mode control signal input, sources a current proportional

 

 

 

 

 

 

 

to the junction temperature. This pin should be left unconnected

 

 

 

 

 

 

 

during normal operation. For more information, see the junction

 

 

 

 

 

 

 

temperature measurement section of this document.

LOUT +

3

O

Left channel + output in BTL mode, + output in SE mode.

L LINE IN

4

I

Left channel line input, selected when HP/

 

pin (16) is held low.

LINE

LHP IN

5

I

Left channel headphone input, selected when HP/

 

pin (16) is

LINE

 

 

 

 

 

 

 

held high.

 

 

 

LBYPASS

6

 

Connect to voltage divider for left channel internal mid-supply bias.

LVDD

7

I

Supply voltage input for left channel and for primary bias circuits.

SHUTDOWN

8

I

Shutdown mode control signal input, places entire IC in shutdown

 

 

 

 

 

 

 

mode when held high, IDD= 0.5 A.

 

 

 

MUTE OUT

9

O

Follows MUTE in pin (11), provides buffered output.

LOUT -

10

O

Left channel - output in BTL mode, high-impedance state in SE

 

 

 

 

 

 

 

mode.

 

 

 

MUTE IN

11

I

Mute control signal input, hold low for normal operation, hold high to

 

 

 

 

 

 

 

mute.

 

 

 

 

 

 

14

I

Mode control signal input, hold low for BTL mode, hold high for SE

SE/BTL

 

 

 

 

 

 

 

 

mode.

 

 

 

ROUT-

15

O

Right channel - output in BTL mode, high impedance state in SE

 

 

 

 

 

 

 

mode.

 

 

 

HP/

 

 

 

 

16

I

MUX control input, hold high to select headphone inputs (5,20),

LINE

 

 

 

 

 

 

 

hold low to select line inputs (4,21).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Copyright ANPEC Electronics Corp.

6

 

 

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

 

 

 

 

APA2020

Pin Description (Cont.)

Pin

 

I/O

Description

 

 

 

Name

No

 

 

 

 

 

 

 

NC

17,23

 

No internal connection.

RVDD

18

I

Supply voltage input for right channel.

RBYPASS

19

 

Connect to voltage divider for right channel internal mild-supply

 

 

 

bias.

RHP IN

20

I

Right channel headphone input, selected when HP/

 

pin (16) is

LINE

 

 

 

held high.

RLINE IN

21

I

Right channel line input, selected when HP/

 

pin (16) is held

LINE

 

 

 

low.

ROUT+

22

O

Right channel + output in BTL mode, + output in SE mode.

Test Information

 

RF

 

 

 

CI

RI

MUX

RL=4

Ω , 8Ω or 32 Ω

 

4.7µ F

 

CB

 

 

 

 

 

SE/BTL

 

 

 

 

HP/LINE

 

Figure 2. BTL Test Circuit

 

RF

CO

 

 

CI

RI

MUX

RL= 4 Ω , 8 Ω

 

 

or 32 Ω

4.7µ F

 

VDD

 

CB

 

 

SE/BTL

 

 

HP/LINE

Figure 3. SE Test Circuit

Customer Service

Anpec Electronics Corp.

Head Office :

5F, No. 2 Li-Hsin Road, SBIP,

Hsin-Chu, Taiwan, R.O.C.

Tel : 886-3-5642000

Fax : 886-3-5642050

Taipei Branch :

7F, No. 137, Lane 235, Pac Chiao Rd.,

Hsin Tien City, Taipei Hsien, Taiwan, R. O. C.

Tel : 886-2-89191368

Fax : 886-2-89191369

Copyright ANPEC Electronics Corp.

7

www.anpec.com.tw

Rev. A.7 - Feb., 2002

 

 

ANPEC APA2020RI-TU, APA2020RI-TR, APA2020KI-TY, APA2020KI-TU, APA2020KI-TR Datasheet

APA2020

Typical Characteristics

Noise

10

 

 

 

 

 

 

5

VDD=5V

 

 

 

 

 

f=1 KHz

 

 

 

 

 

+

 

 

 

 

 

 

Distortion

2

BTL

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

%

 

 

 

 

 

 

Harmonic

0.5

 

 

RL=8Ω

 

RL=3Ω

 

 

 

 

 

 

0.2

 

 

 

 

 

 

0.1

 

 

 

 

 

 

Total

 

 

 

 

 

 

0.06

 

 

 

 

 

 

THD+N-

0

500m

1

1.5

2

2.5

3

 

 

 

W

 

 

 

 

 

Po - Output Power

 

 

 

 

 

Figure 4

 

 

 

Noise

10

 

 

 

 

 

 

 

 

5

VDD=5V

 

 

 

 

 

AV=2

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

RL=4Ω

 

 

 

 

 

 

Distortion

2

 

 

 

 

 

 

BTL

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

%

 

PO=1.8W, RL=3Ω

 

PO=0.25W

 

0.5

 

 

 

Harmonic

 

 

 

 

 

 

 

 

0.2

 

 

 

PO=0.75W

 

PO=1.5W

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

Total

 

 

 

 

 

 

 

 

0.06

 

 

 

 

 

 

 

 

 

20

50

100 200

500

1k

2k

5k

20k

THD+N-

 

 

 

 

 

Hz

 

 

 

 

 

 

 

f - Frequency

 

 

 

 

 

 

 

 

 

 

Figure 6

 

 

 

Noise

10

VDD=5V

 

 

 

 

 

 

5

 

 

 

 

 

 

PO=1.5W

 

 

 

 

 

 

+

 

RL=4Ω

 

 

 

 

 

 

 

Distortion

 

 

 

 

 

 

 

 

2

BTL

 

 

 

 

 

 

 

1

AV=20

AV=10

 

AV=2

 

 

%

 

 

 

 

 

 

 

 

Harmonic

0.5

 

 

 

 

 

 

 

 

0.2

 

AV=2

PO=1.8W, RL=3Ω

 

 

 

 

 

 

 

 

 

 

 

Total

0.1

 

 

 

 

 

 

 

 

0.06

 

 

 

 

 

 

 

 

THD+N-

20

50

100 200

500

1k

2k

5k

20k

 

 

 

 

Hz

 

 

 

 

 

 

 

f - Frequency

 

 

 

 

 

 

 

Figure 5

 

 

 

Noise

10

VDD=5V

 

 

 

 

 

5

 

 

 

 

 

RL=3Ω

 

 

 

 

 

 

 

 

 

 

 

+

 

BTL

 

 

 

 

 

Distortion

2

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

%

 

f=20KHz

 

 

 

Harmonic

0.5

 

 

 

 

 

 

0.2

 

 

f=1KHz

f=20Hz

 

0.1

 

 

 

 

 

 

Total

 

 

 

 

 

 

0.06

 

 

 

 

 

 

100m 200m

500m

1

2

5

10

THD+N-

 

 

 

W

 

 

 

 

 

Po - Output Power

 

 

 

 

 

 

 

 

Figure 7

 

 

 

Copyright ANPEC Electronics Corp.

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