ANPEC APA4835RI-TU Datasheet

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APA4835

Stereo 2.8W Audio Power Amplifier with DC Volume Control and Selectable Gain

Features

Operating Voltage : 3.3V to 5V

Stereo switchable bridged/single-ended power amplifiers

DC Volume Control Interface , 0dB to –105dB

Low Supply Current , IDD = 13mA at Stereo BTL

Low Shutdown Current , IDD = 0.7µA

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

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

2.2W/Ch (typ) into a 3 Ω Load

2.0W/Ch (typ) into a 4 Ω Load

1.2W/Ch (typ) into a 8 Ω Load

Output Power at 10% THD+N , VDD=5V

2.8W/Ch (typ) into a 3 Ω Load

2.3W/Ch (typ) into a 4 Ω Load

1.5W/Ch (typ) into a 8Ω Load

Single-ended mode at 1.0% THD+N

95mW/Ch (typ) into 32Ω Load

Depop Circuitry Integrated

System Beep Detect

Thermal shutdown protection circuitry

High supply voltage ripple rejection

Low Crossover Distortion

PC99 Compliant

28-pin TSSOP-P (with enhanced thermal pad) power package available

Applications

Notebook and Desktop Computers

Multimedia Monitors

Portable Applications

General Description

The APA4835 is a monolithic integrated circuit , which provides DC volume control , and a stereo bridged audio power amplifiers capable of producing 2.8W (2.2W) into 3Ω with less than 10% (1.0%) THD+N. APA4835 includes a DC volume control , stereo bridge-tied and single-ended audio power amplifiers , stereo docking outputs , and a selectable gain control , that makes it optimally fittable for notebook PC , multimedia monitors , and other portable applications. The attenuator range of the volume control in APA4835 is from 0dB (DC_Vol=0.7VDD) to –105dB (DC_Vol=0V) with 32 steps. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in APA4835 , that reduces pops and clicks noise during power up or shutdown mode operation , and protects the chip from being destroyed by over temperature failure. To simplify the audio system design , APA4835 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. Besides the low supply current design to increase the efficiency of the amplifiers , APA4835 also features a shutdown function which keeps the supply current only 0.7µA (typ).

Pin Description

GND

SHUTDOWN

Gain Select

Mode

Mute

VDD

DC Vol

GND

Right Dock

Right In

Beep In

Left In

Left Dock

GND

1

28

2

27

3

26

4

25

5

24

6

23

7

22

8

21

9

20

10

19

11

18

12

17

13

16

14

15

Right Out +

VDD

Right Out -

Right Gain 2

Right Gain 1

GND

BYPASS

HP Sense

GND

Left Gain 1

Left Gain 2

Left Out -

VDD

Left Out +

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 - Mar., 2003

 

 

APA4835

Ordering Information

A P A 4835

 

 

 

 

 

 

 

P ac kag e C o de

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R : T S S O P -P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

H an dling C o de

T em p . R a ng e

 

 

 

 

 

 

 

 

 

 

 

 

 

I : -4 0 to 8 5 °

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T em p . R a ng e

H an dling C o de

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P ac kag e C o de

T U : T u be

T R : T ap e & R e el

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A P A 4 83 5 R :

 

 

 

A P A 4 83 5

 

X X X X X - D a te C od e

 

 

X X X X X

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Block Diagram

Internal gain select

20KΩ

20KΩ

 

Mode

 

Mode

 

 

 

 

 

Mute

 

 

 

 

 

 

 

Control

 

 

20KΩ

0.068µ F

 

HP Sense

 

 

 

 

 

 

 

 

 

DC Vol Control

 

 

10KΩ

10KΩ

 

 

 

 

 

 

 

 

 

 

Left Dock

 

 

 

 

- Left Out

 

20KΩ

20KΩ

 

 

-

 

 

 

 

 

+

 

 

 

 

Left In

 

 

 

20KΩ

 

 

 

 

 

-

20KΩ

 

 

200KΩ

0.33µ F

 

+

Volume

 

 

 

 

Beep In

Beep

Bias

-

 

 

 

Control

 

 

 

 

Detect

+ Left Out

 

200KΩ

0.33µ F

 

32 steps

+

 

 

 

 

 

 

+

 

 

 

 

Right In

 

 

 

 

 

 

 

-

 

+

+ Right Out

20KΩ

 

 

 

 

 

 

 

-

Right Dock

 

 

 

 

 

 

 

 

 

 

 

 

 

20KΩ

 

 

20KΩ

20KΩ

 

 

 

Shutdown

 

 

 

- Right Out

 

 

 

 

 

 

VDD

 

 

+

 

 

 

 

 

Power

-

 

 

 

 

GND

Management

10KΩ

10KΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20KΩ

 

 

Bypass

Click and Pop

 

 

0.068µ F

 

 

Suppression

 

 

 

 

 

 

 

Circuitry

 

 

 

 

 

 

 

 

20KΩ

20KΩ

 

 

Absolute Maximum Ratings

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

Symbol

Parameter

Rating

Unit

VDD

Supply Voltage

6

V

TA

Operating Ambient Temperature Range

-40 to 85

° C

TJ

Maximum Junction Temperature

Internally limited*1

° C

TSTG

Storage Temperature Range

-65 to +150

° C

TS

Soldering Temperature,10 seconds

260

° C

VESD

Electrostatic Discharge

-2000 to 2000*2

V

Note :*1. APA4835 integrates internal thermal shutdown protection when junction temperature ramp up to 150°C. *2. Human body model : C=100pF, R=1500, 3 positive pulses plus 3 negative pulses

Copyright ANPEC Electronics Corp.

2

www.anpec.com.tw

Rev. A.7 - Mar., 2003

 

 

APA4835

Thermal Characteristics

 

Symbol

Parameter

 

Rating

Unit

 

 

 

 

 

 

RTHJA

Thermal Resistance from Junction to Ambient in Free Air

 

 

 

 

TSSOP-P*

 

60

°C/W

 

 

TSSOP-P**

 

35

 

*5in2 printed circuit board with 2oz trace and copper pad through 12 25mil diameter vias. The

thermal pad on the TSSOP_P package

without solder on the printed circuit board.

 

 

 

**5in2 printed circuit board with 2oz trace and copper pad through 12 25mil diameter vias. The thermal pad on the TSSOP_P package with solder on the printed circuit board.

Electical Characteristics

Electrical Characteristics for Entire IC

The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for

TA= 25°C

 

 

 

 

Symbol

Parameter

Test Conditions

 

 

APA4835

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

Min.

Typ.

 

Max.

 

 

 

 

 

 

 

 

 

 

VDD

Supply Voltage

 

 

3.3

 

 

5.5

V

IDD

Quiescent Power Supply

VIN=0V, IO=0A

 

 

13

 

25

mA

 

Current

 

 

 

 

 

 

 

ISD

Shutdown Current

VPIN 2= VDD

 

 

0.7

 

2.0

µ A

VIH

SE/BTL High Input Voltage

 

 

4

 

 

 

V

VIL

SE/BTL Low Input Voltage

 

 

 

 

 

0.8

V

Electrical Characteristics for Volume Attenuators

The following specifications apply for VDD= 5V. Limits apply for TA= 25°C

Symbol

Parameter

Test Conditions

 

APA4835

 

Unit

 

 

 

Min.

Typ.

 

Max.

 

 

 

 

 

 

 

 

 

CRANGE

Attenuator Range

Gain with VPIN 7=5V

 

 

 

±0.5

dB

 

 

Attenuation with VPIN 7=0V

-90

-105

 

 

 

AM

Mute Attenuation

VPIN 5=5V, Bridged Mode

-88

 

 

 

dB

 

 

VPIN 5=5V, Single-Ended Mode

-88

 

 

 

 

Electrical Characteristics for BTL Mode Operation

The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C

Symbol

Parameter

Test Conditions

APA4835

Unit

 

 

 

Typ.

 

 

 

 

 

 

VOS

Output Offset Voltage

VIN=0V

5

mV

PO

Output Power

THD=1%, f=1kHz

 

 

 

 

RL=3Ω

2.2

W

 

 

RL=4Ω

2.0

 

 

 

RL=8Ω

1.2

 

 

 

THD=10%, f=1kHz

 

 

 

 

RL=8Ω

1.5

 

 

 

 

 

 

Copyright ANPEC Electronics Corp.

3

www.anpec.com.tw

Rev. A.7 - Mar., 2003

 

 

 

APA4835

Electical Characteristics (Cont.)

Electrical Characteristics for BTL Mode Operation (Cont.)

The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C

Symbol

Parameter

Test Conditions

APA4835

Unit

 

 

 

Typ.

 

 

 

 

 

 

THD+N

Total Harmonic Distortion + Noise

AVD=2, 20Hz<f<20kHz

 

 

 

 

RL=4Ω , PO =1W

0.2

%

 

 

RL=8Ω , PO=1W

0.15

 

 

 

RL=32Ω , PO =340mW

0.1

 

 

 

 

 

 

PSRR

Power Supply Rejection Ratio

VRIPPLE=200mVRms , RL=8Ω

74

dB

 

 

CB=2.2µ F, f=120Hz

 

 

XTALK

Channel Separation

f=1kHz , CB=2.2µ F

95

dB

SNR

Signal-to-Noise Ratio

VDD=5V, PO =1.1W, RL=8Ω ,A-Wtd

95

dB

 

 

Filter

 

 

 

 

 

 

 

VN

Output Noise Voltage

RL=8Ω ,A-Wtd Filter

30

uV

Electrical Characteristics for SE Mode Operation

The following specifications apply for VDD= 5V unless otherwise noted. Limits apply for TA= 25°C

Symbol

Parameter

 

Test Conditions

APA4835

Unit

 

 

 

 

 

Typ.

 

 

 

 

 

 

 

 

VOS

Output Offset Voltage

VIN=0V

 

 

5

mV

PO

Output Power

THD=1%,

f=1kHz,

RL=32Ω

95

mW

 

 

THD=10%,

f=1kHz,

RL=32Ω

100

THD+N

Total Harmonic Distortion

AV= 1 , VOUT=1VRMS, f=1kHz, RL=1kΩ

0.01

%

 

plus Noise

 

 

 

 

 

 

PO =75mW, RL=32Ω , AV= 1, f=1kHz

0.005

%

 

 

 

 

 

 

 

PSRR

Power Supply Rejection

VRIPPLE=200mVRMS , f=120Hz, CB=2.2µ F

58

dB

 

Ratio

 

 

 

 

 

XTALK

Channel Separation

f=1kHz , CB=2.2µ F

 

95

dB

SNR

Signal-to-Noise Ratio

PO =75mW, RL=32Ω , A-Wtd Filter

102

dB

VN

Output Noise Voltage

RL=1kΩ , A-Wtd Filter

 

40

uV

Pin Description

 

Pin

I/O

 

 

Description

Name

 

No

 

 

 

 

GND

 

1, 8, 14, 20,

 

Ground connection for circuitry.

 

 

 

23

 

 

 

 

Shutdown

 

2

I

Shutdown mode control signal input, place entire IC in shutdown mode when held high, Idd=0.7uA

Gain Select

 

3

I

Gain select input pin

 

 

Mode

 

4

I

Mode select input pin

 

 

Mute

 

5

I

Mute control input pin

 

 

 

 

 

 

 

 

 

Copyright

ANPEC Electronics Corp.

4

www.anpec.com.tw

Rev. A.7 - Mar., 2003

APA4835

Pin Description

Pin

 

I/O

Description

Name

 

No

 

 

VDD

 

6, 16, 27

 

Supply voltage input pin

DC_Vol

 

7

I

Volume control function input pin.

Right Dock

 

9

O

Right docking output pin

Right In

 

10

I

Right channel audio input pin

Beep In

 

11

I

Beep signal input pin

Left In

 

12

I

Left channel audio input pin

Left Dock

 

13

O

Right docking output pin

Left Out +

 

15

O

Left channel positive output pin

Left Out -

 

17

O

Left channel negative output pin

Left Gain 2

 

18

 

Connect pin 2 of the external gain setting resistor for left channel

Left Gain 1

 

19

 

Connect pin 1 of the external gain setting resistor for left channel

HP Sense

 

21

I

Headphone sense control pin

Bypass

 

22

 

Bypass pin

Right Gain 1

 

24

 

Connect pin 1 of the external gain setting resistor for right channel

Right Gain 2

 

25

 

Connect pin 2 of the external gain setting resistor for right channel

Right Out -

 

26

O

Right channel negative output pin

Right Out +

 

28

O

Right channel positive output pin

Truth Table for Logic Inputs

Mute

Mode

HP Sense

DC Vol. Control

Bridged Output

Single-Ended

 

 

 

 

 

 

0

0

0

Fixed Level

Vol. Fixed

-

 

 

 

 

 

 

0

0

1

Fixed Level

Muted

Vol. Fixed

 

 

 

 

 

 

0

1

0

Adjusted

Vol. Changes

-

 

 

 

 

 

 

0

1

1

Adjusted

Muted

Vol. Changed

 

 

 

 

 

 

1

×

×

-

Muted

Muted

 

 

 

 

 

 

Copyright ANPEC Electronics Corp.

5

www.anpec.com.tw

Rev. A.7 - Mar., 2003

 

 

APA4835

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

VD D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

µ

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R_var

 

 

DC Vol Control

 

 

 

 

 

 

 

 

 

 

 

 

 

r*=R_var/50

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

20K

 

20K

 

 

 

 

 

 

100K

 

 

Internal gain select

 

 

 

 

 

 

 

 

 

 

 

HP Sense

 

3

 

7

19

 

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100K

21

 

 

 

 

 

 

 

 

 

 

 

 

To Control Pin on

 

 

 

 

 

 

 

 

 

 

 

 

 

Headphone Jack

Mute

5

Mode

 

 

 

 

 

 

20K

 

 

 

 

 

 

4

Control

 

 

10K

 

10K

 

0.068µ F

 

 

 

 

 

Mode

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Left Dock

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20K

 

 

 

 

 

 

 

 

17

- Left Out

 

 

 

 

 

 

 

 

 

 

 

-

 

+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Left In

 

 

 

 

 

 

 

 

 

 

 

 

 

20KΩ

12

 

 

 

 

 

+

 

 

220µ F

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

Control

Pin

 

 

+

 

 

 

 

 

 

20K

20K

 

 

 

 

 

 

+

 

 

 

 

1K

Pin

Ring

 

200KΩ

0.33µ

F

 

Beep

 

Volume

 

 

 

 

 

 

Beep In

 

 

11

 

 

 

 

-

15

 

 

 

 

 

 

Bias

 

Control

 

 

+ Left Out

 

 

 

 

 

 

Detect

 

 

 

+

 

 

 

 

 

 

 

 

 

 

 

32 steps

 

 

To HP sense

 

 

 

200KΩ

Right In

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Right

 

 

+

 

 

 

 

 

 

Circuit

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

Audio

 

+

 

 

-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sleeve

Input

20KΩ

0.33µ

F

 

 

 

 

 

 

 

+

28

+ Right Out

 

 

20K

 

 

 

 

 

 

 

 

 

 

 

Tip

 

 

9

 

 

 

 

 

 

-

 

 

 

 

 

 

 

Right Dock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Headphone Jack

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

 

20K

20K

 

- Right Out

 

 

 

 

6,16,27

 

Power

 

 

 

+

 

26

+

 

 

 

 

 

 

 

 

 

 

 

 

-

 

 

 

 

 

 

 

 

 

 

Managem ent

 

 

 

 

 

 

 

 

 

 

1,8,14,20,23

 

 

 

 

 

220µ F

 

 

 

 

 

 

 

10K

 

 

 

1K

 

 

 

 

GND

Bypass

 

 

 

 

 

10K

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

22

 

Click and Pop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20K

 

 

 

0.1µ F

0.1µ F

0.1µ F

 

 

 

Suppression

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuitry

 

 

 

 

 

 

0.068µ F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 .2 µ

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

24

 

25

 

 

 

 

 

 

 

 

 

 

 

Shutdown

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20K

 

20K

 

 

 

 

 

* Add a resistor to avoid volume control gain error at power on status. For the R_var with 10KΩ variable resistor, the recommended value of r is in range of 100~200Ω .

Copyright ANPEC Electronics Corp.

6

www.anpec.com.tw

Rev. A.7 - Mar., 2003

 

 

APA4835

Typical Characteristics

(%)

10

 

 

 

 

 

 

 

 

 

Distortion+Noise

 

 

 

 

 

 

 

 

 

5

VDD=5V

 

 

 

 

 

 

 

 

RL=3Ω

 

 

 

 

 

 

 

2

Po=1.75W

 

 

 

 

 

 

BTL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harmonic

0.2

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

0.05

 

 

 

 

 

 

 

 

 

THD+N-Total

0.02

 

 

 

 

 

 

 

 

 

0.01

 

 

 

 

 

 

 

 

 

20

50

100

200

500

1k

2k

5k

10k

20k

 

 

 

 

 

 

 

 

 

 

Frequency (Hz)

(%)

10

 

 

 

 

 

 

 

 

 

Distortion+Noise

 

 

 

 

 

 

 

 

 

5

VDD=5V

 

 

 

 

 

 

 

 

RL=8Ω

 

 

 

 

 

 

 

2

Po=1.0W

 

 

 

 

 

 

 

BTL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harmonic

0.2

 

 

 

 

 

 

 

 

 

0.1

AV=8

 

AV=2

 

 

 

 

 

0.05

 

 

 

 

 

 

 

 

 

THD+N-Total

0.02

 

 

 

AV=4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.01

 

 

 

 

 

 

 

 

 

20

50

100

200

500

1k

2k

5k

10k

20k

 

 

 

 

 

 

 

 

 

 

Frequency (Hz)

(%)

10

 

 

 

 

 

 

 

 

 

Distortion+Noise

 

 

 

 

 

 

 

 

 

5

VDD=5V

 

 

 

 

 

 

 

 

RL=4Ω

 

 

 

 

 

 

 

2

Po=1.5W

 

 

 

 

 

 

 

BTL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harmonic

0.2

 

 

 

 

 

 

 

 

 

0.1

 

 

 

 

 

 

 

 

 

0.05

 

 

 

 

 

 

 

 

 

THD+N-Total

0.02

 

 

 

 

 

 

 

 

 

0.01

 

 

 

 

 

 

 

 

 

20

50

100

200

500

1k

2k

5k

10k

20k

 

 

 

 

 

 

 

 

 

 

Frequency (Hz)

(%)

 

 

 

 

 

 

 

 

 

 

Distortion+Noise

5

VDD=5V

 

 

 

 

 

 

 

 

RL=16Ω

 

 

 

 

 

 

 

2

Po=0.5W

 

 

 

 

 

 

 

 

BTL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Harmonic

0.2

 

 

 

 

 

 

 

 

 

0.1

 

AV=4

AV=2

 

 

 

 

0.05

 

 

 

 

 

 

 

 

 

THD+N-Total

0.02

 

 

 

AV=8

 

 

 

 

 

 

 

 

 

 

 

 

 

0.01

 

 

 

 

 

 

 

 

 

20

50

100

200

500

1k

2k

5k

10k

20k

 

 

 

 

 

 

 

 

 

 

Frequency (Hz)

Copyright ANPEC Electronics Corp.

7

www.anpec.com.tw

Rev. A.7 - Mar., 2003

 

 

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