ANPEC APA2120, APA2121 Service Manual

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APA2120/2121

Stereo 2-W Audio Power Amplifier (with DC_Volume Control)

Features

• Low operating current with 14mA

• Improved depop circuitry to eliminate turn-on

and turn off transients in outputs

• High PSRR

• 32 steps volume adjustable by DC voltage w ith

hysteresis

• 2W pe r channel output power into 4Ω load at 5V,

BTL mode

• Two outpu t modes allowable with BTL and SE

modes selected by SE/BTL pin

• Low current consumption in shutdown mode

(50µA)

• Short C ircuit Protection

• Power off depop circuit integration

• TSSOP-24 with or without thermal pad package

General Description

APA2120/1 is a monolithic integrated circuit, which provides precise DC volume control, and a stereo bridged audio po wer amplifiers capable of producing

2. 7W(2.0W) into 3Ω with less than 10% (1.0%) THD+N. The attenuator range of the volume control in APA2120/1 is f rom 20dB (DC_Vol=0V) to -80dB (DC_Vol=3.54V) wit h 32 steps. The advantage of internal gain se tting can be less components and PCB area. Both of the depop circuitry and the thermal shut down protection circuitry are integrated in APA2120/1, that reduce pops and clicks noise during power up or shutdown mode operation. It also improves the power of f pop noise and protects the chip from being destroyed by over temperature and short current failure. To simplify the audio system

Applications

design, APA2120/1 combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo

• NoteBook PC

• LCD Monitor or TV

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. Besides, the multiple input selection is used for portable audio system.

Ordering and Marking Information

APA2120/1

Lead Free Code Handling Code Temp. Range Package Code

APA2120/1 R :

* 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. Rev. A.1 - Mar., 2003

APA2120/1 XXXXX

Package Code R : TSSOP-P * Temp. Range I : - 40 to 85 C Handling Code TU : Tube TR : Tape & Reel TY : Tray Lead Free Code L : Lead Free Device Blank : Original Device

XXXXX - Date Code

°

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APA2120/2121

Block Diagram

LLINEIN

LHPIN

RLINEIN

RHPIN

VOLUME

HP/LINE

SE/BTL

SHUTDOWN

PCBEEP

MUX

HP/LINE

SE/BTL

Shutdown

ckt

PC-BEEP

ckt

Volume Control

BYPASS

Clock Gen

LOUT+

LOUT-

LBYPASS

BYPASS

ROUT+

ROUT-

RBYPASS

CLK

For APA2121

Absolute Maximum Ratings

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

Symbol Parameter Rating Unit

V

DD

V

IN

T

A

T

J

T

STG

T

S

V

ESD

P

D

Note:

1.APA2120/1 integrated internal thermal s hutdown protection when junction temperature ramp up to 150°C

2.Human body model: C=100pF, R=1500Ω, 3 positives pulse plus 3 negative pulses

3.Machine model: C=200pF, L=0.5µF, 3 positive pulses plus 3 negative pulses

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

Supply Voltage Range -0.3 to 6 V Input Voltage Range, SE/BTL, HP/LINE,

SHUTDOWN, PCBEN

-0.3 to VDD+0.3 V

Operating Ambient Temperature Range -40 to 85 Maximum Junction Temperature Intermal Limited*

1

Storage Temperature Range -65 to +150 Soldering Temperature,10 seconds 260

2

3

Electrostatic Discharge

-3000 to 3000*

-200 to 200*

Power Dissipation Intermal Limited

°

C

°

C

°

C

°

C

V

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APA2120/2121

Typ.

Max.

Unit

Recommended Operating Conditions

Min. Max. Unit

Supply Voltage, V

DD

High level threshold voltage, V

Low level threshold voltage, V Common mode input voltage, V

IH

SE/BTL , HP/LINE 4 SHUTDOWN, PCBEN 1.0

SHUTDOWN, PCBEN 2

IL

ICM

SE/BTL , HP/LINE 3

4.5 5.5 V

VDD-1.0 V

Thermal Characteristics

Symbol Parameter Value Unit

R

Thermal Resistance from Junction to Ambient in Free Air

THJA

TSSOP-P*

* 5 in2 printed circuit b oard with 2oz trace and copper pad through 9 25mil diameter vias.

45

The the rmal pad on the TSSOP_P package with solder on the printed circuit board.

Electrical Characteristics

VDD=5V, -20°C<TA<85 °C (unless otherwise noted)

°

C/W

V

Symbol Parameter Test Condition

VDD

Supply Voltage 4.5 5.5 V

SE/BTL=0V

IDD

ISD

IIH IIL

V

OS

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

Supply Current

Supply Current in Shutdown Mode

SE/BTL=5V SE/BTL=5V SHUTDOWN=0V

High input Current 900 nA Low Input Current 900 nA Output Differential Voltage 5 mV

APA2120/1

Min.

14 25

8.0 15

50

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mA

µ

A

APA2120/2121

Electrical Cha racteristics (Cont.)

Operating Chara cteristics, BTL mode VDD=5V,TA=25°C,RL=4Ω, Gain=2V/V (unless otherwise noted)

Symbol Parameter Test Condition

THD=10%, RL=3Ω, Fin=1kHz THD=10%, RL=4Ω, Fin=1kHz

PO

THD+N

PSRR

Maximum Output Power

Total Harmonic Distortion Plus Noise

Power Ripple Rejection Ratio

THD=10%, RL=8Ω, Fin=1kHz THD=1%, RL=3Ω, Fin=1kHz THD=1%, RL=4Ω, Fin=1kHz THD=0.5%, RL=8Ω, Fin=1kHz PO=1.5W, RL=4Ω, Fin=1kHz PO=1W, RL=8Ω, Fin=1kHz VIN=0.1Vrms, RL=8Ω, CB=1µF, Fin=120Hz

APA2120/1

Min. Typ. Max.

2.7

2.3

1.5

2.0

1.9

1 1.1

0.05

0.07

60 dB

Unit

W

%

Xtalk

S/N

Channel Separation Signal to Noise Ratio

CB=1µF, RL=8Ω, Fin=1kHz PO=1.1W, RL=8Ω, A_wieght

Operating Characteristics, SE mode VDD=5V,TA=25°C,RL=4Ω, Gain=1V/V (unless otherwise noted)

Symbol Parameter Test Condition

THD=10%, RL=8Ω, Fin=1kHz THD=10%, RL=32Ω, Fin=1kHz

P

O

Maximum Output Power

THD=1%, RL=8Ω, Fin=1kHz THD=1%, RL=32Ω, Fin=1kHz

THD+N

PSRR

Xtalk

S/N

Total Harmonic Distortion Plus Noise

Power Ripple Rejection Ratio

Channel Separation Signal to Noise Ratio

PO=250mW, RL=8Ω, Fin=1kHz PO=75mW, RL=32Ω, Fin=1kHz VIN=0.1Vrms, RL=8Ω, CB=1µF,

Fin=120Hz CB=1µF, RL=32Ω, Fin=1kHz PO=75mW, SE, RL=32Ω, A_wieght

90 dB 95 dB

APA2120/1

Min. Typ. Max.

400 110 320

90

0.08

48 dB

100 100 dB

Unit

mW

%

dB

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

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APA2120/2121

Pin Description

GND

PCBEN

VOLUME

LOUT+

LLINEIN

LHPIN

PVDD

RBYPASS

LOUT-

LBYPASS

BYPASS

GND

1

2 3 4 5 6

7 8 9

10 11 12

APA2120

TOP View

Thermal

Pad

24 23 22 21 20

19 18 17 16

15 14 13

GND RLINEIN SHUTDOWN ROUT+ RHPIN VDD PVDD CLK

ROUTSE/BTL PC-BEEP GND

GND

HP/LINE

VOLUME

LOUT+

LLINEIN

LHPIN

PVDD

RBYPASS

LOUT-

LBYPASS

BYPASS

GND

1

2 3 4 5 6

7 8 9

10 11 12

APA2121

TOP View

24 23 22 21 20

19 18 17 16

15 14 13

GND RLINEIN SHUTDOWN ROUT+ RHPIN VDD PVDD CLK

ROUTSE/BTL PC-BEEP GND

APA2120/1

Bottom View

Multiple Input Selection PCBEEP Control Input APA2120 SE/BTL PCBEN APA2121 HP/LINE -

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

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APA2120/2121

Pin Function Description

Name No

GND

PCBEN 2 I/P BEEP mode control input, active H, for APA2120 only

HP/LINE 2 I/P

VOLUME 3 Input signal for internal volume gain setting.

LOUT+ 4 O/P

LLINEIN 5 I/P

LHPIN 6 O/P

PVDD 7,18 Supply voltage only for power amplifier.

RBYPASS 8 I/P Right channel bypass voltage.

LOUT- 9 O/P

LBYPASS 10 I/P

BYPASS 11 Bias voltage generator

PC_BEEP

SE/BTL 15 I/P

ROUT- 16 O/P

CLK 17 Clock signal generator VDD 19

RHPIN 20 I/P

ROUT+ 21 O/P

SHUTDOWN 22 I/P

RLINEIN 23 I/P

1,12,

13,24

Config.

14 I/P

Description

Ground connection, Connected to thermal pad.

Multi-input selection input, headphone mode when held high, line-in mode when held low for APA2121 only.

Left channel positive output in BTL mode and SE mode. Left channel line input terminal, selected when HP/LINE is held low. Left channel headphone input terminal, selected when HP/LINE is

held high.

Left channel negative output in BTL mode and high impedance in SE mode. Left channel bias voltage generator.

PCBEP signal input Output mode control input, high for SE output mode and low for

BTL mode. Right channel negative output in BTL mode and high impedance in SE mode.

Supply voltage for internal circuit excepting power amplifier. Right channel headphone input terminal, selected when HP/LINE is

held high. Right channel positive output in BTL mode and SE mode.

It will be into shutdown mode when pull low. Right channel line input terminal, selected when HP/LINE is held

low.

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

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APA2120/2121

Control Input Ta ble

For APA2120

SE/BTL SHUTDOWN PC-BEEP Operating mode

X L Disable Shutdown mode

L H Disable Line input, BTL out

H H Disable HP input, SE out

X X Enable PCBEEP input, BTL out

For APA2121

SE/BTL HP/LINE SHUTDOWN PC-BEEP Operating mode

X X L Disable Shutdown mode

L L H Disable Line input, BTL out

L H H Disable HP input, BTL out H L H Disable Line input, SE out H H H Disable HP input, BTL out

X X X Enable PCBEEP input, BTL out

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

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APA2120/2121

Typical Application Circuit

APA2120

L-LINE

R-LINE

L-HP

R-HP

1µF

50kΩ

100kΩ

1µF

VDD

100kΩ

LLINEIN

LHPIN

RLINEIN

RHPIN

VOLUME

SE/BTL

MUX

SE/BTL

VDD

0.1µF

VDD PVDDGND

Volume Control

0Ω

100µF

BYPASS

LOUT+

LOUT-

LBYPASS

BYPASS

ROUT+

ROUT-

4Ω

2.2µF

4Ω

220µF

SE/BTL

1kΩ

Control

Headphone Jack

Tip

Ring

Sleeve

Shutdown

SHUTDOWN

Signal

0.47µF

BEEP

Signal

PCBEN

PCBEEP

PCBEN

Signal

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

Shutdown

ckt

PC-BEEP

ckt

Clock Gen

RBYPASS

CLK

47nF

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APA2120/2121

Typical Application Circuit

APA2121

L-LINE

R-LINE

L-HP

R-HP

HP/LINE

Signal

1µF

100kΩ

1µF

50kΩ

VDD

100kΩ

LLINEIN

RLINEIN

VOLUME

HP/LINE

VDD

SE/BTL

LHPIN

RHPIN

MUX

HP/LINE

SE/BTL

VDD

VDD PVDDGND

Volume Control

0Ω

100µF0.1µF

BYPASS

LOUT+

LOUT-

LBYPASS

BYPASS

ROUT+

ROUT-

4Ω

2.2µF

4Ω

220µF

SE/BTL

1kΩ

Control

Headphone Jack

Ring

Sleeve

Tip

Shutdown

SHUTDOWN

Signal

BEEP Signal

PCBEEP

0.47µF

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

Shutdown

ckt

PC-BEEP

ckt

Clock Gen

RBYPASS

CLK

47nF

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APA2120/2121

Volume Control Table_BTL Mode

Supply Voltage Vdd=5V

Gain(dB) High(V) Low(V) Hysteresis(mV) Recommended Voltage(V)

20 0.12 0.00 0 18 0.23 0.17 52 0.20 16 0.34 0.28 51 0.31 14 0.46 0.39 50 0.43 12 0.57 0.51 49 0.54 10 0.69 0.62 47 0.65

8 0.80 0.73 46 0.77

6 0.91 0.84 45 0.88

4 1.03 0.96 44 0.99

2 1.14 1.07 43 1.10

0 1.25 1.18 41 1.22

-2 1.37 1.29 40 1.33

-4 1.48 1.41 39 1.44

-6 1.59 1.52 38 1.56

-8 1.71 1.63 37 1.67

-10 1.82 1.74 35 1.78

-12 1.93 1.85 34 1.89

-14 2.05 1.97 33 2.01

-16 2.16 2.08 32 2.12

-18 2.28 2.19 30 2.23

-20 2.39 2.30 29 2.35

-22 2.50 2.42 28 2.46

-24 2.62 2.53 27 2.57

-26 2.73 2.64 26 2.69

-28 2.84 2.75 24 2.80

-30 2.96 2.87 23 2.91

-32 3.07 2.98 22 3.02

-34 3.18 3.09 21 3.14

-36 3.30 3.20 20 3.25

-38 3.41 3.32 18 3.36

-40 3.52 3.43 17 3.48

-80 5.00 3.54 16 5

Copyright  ANPEC Electronics Corp. Rev. A.1 - Mar., 2003

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