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BL6211中文资料

1.25 Watt Fully Differential Audio Power Amplifier

With Internal Feedback Resistors

Features

Fully differential amplifier

Improved PSRR at 217Hz(VDD>3.0V) 86dB (typ)

Power output at 5.0V & 1% THD 1.25W (typ)

Power output at 3.6V & 1% THD 0.6W (typ)

Ultra low shutdown current 0.01μA (typ)

Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions

Thermal overload protection circuitry

No output coupling capacitors, bootstrap capacitors required

Unity-gain stable

External gain configuration capability

Available in space-saving package: 9-bump micro SMD and 8-pin MSOP8

General description

The BL6211 is a fully differential audio power amplifier designed for portable communication device applications. It is capable of delivering 1.25 watt of continuous average power to an 8? BTL load with less than 1% distortion (THD+N) from a 5V battery voltage. It operates from 2.2 to 5.5V.

Features like 86dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving 8-pin MSOP8 and 9-bump micro SMD package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown mode make BL6211 ideal for wireless handsets.

The BL6211 is unity-gain stable, and the gain can be configured by external input resistors and internal feedback resistors.

Applications

Wireless handsets

Portable audio devices

PDAs, Handheld computers

Pin Diagram (Top View)

E G AAG

E - Die Run Traceability G - Date Code

AAG - BL6211ITLX ROHS

9 Bump micro SMD Package

(T op View)

9 Bump micro SMD Marking

321

SHUTDOWN

B C

A GND IN-GND BYP ASS

VO2

VO1IN+VDD

1234

8765

SHUTDOWN

BYP ASS

IN+IN-VO2GND VDD VO1

E G ABG

E - Die Run Traceability G - Date Code

ABG - BL6211MM ROHS

Mini Small O utline (MSO P8) Package

(T op View)

MSO P8 Marking

Figure 1 Pin Diagram of BL6211

Pin Definitions and Functions

Table 1.

Pin Definitions and Functions

MSOP8 9-Bump micro SMD

Symbol Type Functions

SHUTDOWN

Shutdown Pin, active low.

2 C1 BYPASS I Common mode voltage. Connect a bypass

capacitor to GND for common mode voltage filtering. The bypass capacitor is optional.

3 A3 IN+ I Positive differential input. 4

IN-

Negative differential input.

MSOP8 9-Bump micro SMD

Symbol Type Functions

5 A2 VO1 O Positive differential output.

6 B3 VDD I Power supply

7 B1,B2 GND I Ground.

VO2

Negative differential output.

Operation conditions and Electrical characteristics

Operation Conditions

Table 2.

Operation Conditions

Parameter Symbol Min Typ Max Unit Power Supply V oltage V DD 2.2 5.5 V Operating Temperature

Range

T A

-40

℃

ctrical Characteristics

Table 3.

V DD =5V (The following specifications apply for 8Ωload ，A V =1V/V ，T A =25℃,

unless otherwise specified.)

Parameter Symbol Conditions

Min Typ Max Unit VIN=0V , no load 2.5 5

Quiescent Power Supply Current I DD VIN=0V , R L =8Ω 4 8 mA

Shutdown Current I SD V SHUTDOWN =GND 0.01 1 μA Output Power P O THD=1%(max); f=1kHz 1.25 W Total Harmonic Distortion + Noise

THD+N

P O =0.6Wrms; f=1kHz

0.02

Vripple=200mV sine p-p

f=217Hz (note1)

-88 f=1kHz (note1) -83 f=217Hz (Note2) -83 Power Supply Rejection Ratio

PSRR F=1KHz (Note2)

-83

Parameter Symbol Conditions Min Typ Max Unit

Common Mode

Rejection Ratio

CMRR f=217Hz V CM=200mV PP-78 dB Output Offset V OS VIN=0V 2 8 mV Shutdown V oltage

Input High

V SDIH 1.5 V

Shutdown V oltage

Input Low

V SDIL 0.5 V

Closed Loop Gain A V 36kΩ

40kΩ

44kΩ

V/V

Note1: Unterminated input Note2: 10Ωterminated input

Table 4.

V DD =3.6V (The following specifications apply for 8Ωload ，A V =1V/V ，T A =25℃,

unless otherwise specified.)

Parameter Symbol Conditions

Min Typ Max Unit VIN=0V , no load 2 4.5

Quiescent Power Supply Current I DD VIN=0V , R L =8Ω 3.5 7.5 mA

Shutdown Current I SD V SHUTDOWN =GND 0.01 1 μA Output Power P O THD=1%(max); f=1kHz 0.6 W Total Harmonic Distortion + Noise

THD+N

P O =0.4Wrms; f=1kHz

0.02

Vripple=200mV sine p-p

f=217Hz (note1)

-86 f=1kHz (note1) -83 f=217Hz (Note2) -83 Power Supply Rejection Ratio

PSRR F=1KHz (Note2)

-83 dB

Common Mode Rejection Ratio CMRR f=217Hz V CM =200mV PP -76 dB Output Offset V OS VIN=0V 2 8 mV Shutdown V oltage Input High V SDIH

1.5

V Shutdown V oltage Input Low V SDIL 0.5 V

Closed Loop Gain

Gain 36k ΩRi

40k ΩRi

44k ΩRi

V/V

Note1: Unterminated input Note2: 10Ωterminated input

Typical characteristics

2.2

2.0THD+N=10%

THD+N=1%

1.8

1.6

1.41.2

1.0800m 600m 400m

200m

0O u t p u t P o w e r (W )

Output Power vs Supply Voltage

R L =8Ω

Supply Voltage(V)

2.53

3.54

4.55

5.5

V DD =5V

f=1KHz THD+N ≤1%R L =8Ω

0.7

0.6

0.50.40.3

0.20.1

P o w e r D i s s p a t i o n (W )

Power Dissipation vs Output Power

Output Power(W)

00.20.40.60.8 1.0 1.2

V DD =3.6V f=1KHz THD+N ≤1%R L =8Ω

0.3

0.20.10P o w e r D i s s p a t i o n (W )

Power Dissipation vs Output Power

Output Power(W)

Ambient Temperature (℃)

100

120140160

Power Derating Curve

0P o w e r D i s s p a t i o n (W )

Micro SMD

MSOP

Frequency (Hz )

100

10K 20K

10.1

0.001T H D +N (%)

0.01THD+N vs Frequency V DD =5V, R L =8Ω,P O =600mW

Frequency (Hz )

100

10K 20K

0.1

0.001

T H D +N (%)

0.01

THD+N vs Frequency V DD =3.6V, R L =8Ω,P O =400mW

Frequency (Hz )

100

10K 20K

0.1

0.001

T H D +N (%)

0.01

THD+N vs Frequency V DD =2.5V, R L =8Ω,P O =150mW

20kHz

1kHz

20Hz

THD+N vs Output Power

V DD =5V, R L =8Ω

0.1

0.001

T H D +N (%)

0.01

Output Power (W)

10m

100m 12

20kHz

1kHz

20Hz

THD+N vs Output Power V DD =3.6V, R L =8Ω

0.1

0.001

T H D +N (%)

0.01

Output Power (W)

10m

100m 1

20kHz

1kHz

20Hz

THD+N vs Output Power V DD =2.5V, R L =8Ω

0.1

0.001

T H D +N (%)

0.01

Output Power (W)

10m

100m 1

Frequency (Hz )

100

10K 20K

-100

P S R R (d B )

PSRR vs Frequency

V DD =5.0V, R L =8Ω,input 10Ω Terminated

-90-80-70-60-50-40-30

-20-100C (BYPASS)=0μF

C (BYPASS)=1μF

C (BYPASS)=0.47μF

Frequency (Hz )

100

10K 20K

-100

P S R R (d B )

PSRR vs Frequency

V DD =3.6V, R L =8Ω,input 10Ω Terminated

-90-80-70-60-50-40-30

-20-100C (BYPASS)=0μF

C (BYPASS)=1μF

C (BYPASS)=0.47μF

DC Common-Mode Voltage (V)

PSRR vs Common Mode voltage V DD =5.0V, R L =8Ω, 217Hz, 200mV PP

-100

P S R R (d B )

-90-80-70-60-50-40-30

-20-100

DC Common-Mode Voltage (V)

PSRR vs Common Mode voltage V DD =3.6V, R L =8Ω, 217Hz, 200mV PP

3.6

-100

P S R R (d B )

-90-80-70-60-50-40-30

-20-100

-200

-160-120-80-40040

80120

160200-200-160-120-80-40040

80120

160200Open Loop Frequency Response

Frequency (Hz )

Gain

Phase

G a i n (d B )

P h a s e (O )

-60

-50-40-30-20-100

1020

3040-180-140-100-60-202060

100

140180220

Closed Loop Frequency Response

Frequency (Hz )

Gain

Phase

G a i n (d B )

P h a s e (O )

Application

IN-

IN+

VO1

VO2

VDD

GND

Bias Circuitry

BYPASS

40k Ω

1μF

-C B 1μF R f C S 40k ΩR f

20k ΩR i

20k Ω

R i D i f f e r e n t i a l A u d i o I n p u t

8Ω

R L +-C B is optional SHUTDOWN

V IH

V IL

V DD /2

BL6211

Figure 2

Typical Differential Input Application

IN-

IN+

VO1

VO2

VDD

GND

Bias Circuitry

BYPASS

40k Ω

1μF

-C B 1μF R f C S 40k ΩR f

20k ΩR i

20k Ω

R i D i f f e r e n t i a l A u d i o I n p u t

8Ω

R L +-C B is optional

SHUTDOWN

V IH

V IL

V DD /2

BL6211

C i

0.39μF C i 0.39μF

IN-

IN+

VO1

VO2

VDD

GND

Bias Circuitry

BYPASS

40k Ω

1μF

-C B 1μF R f C S 40k ΩR f

20k ΩR i

20k Ω

R i Audio Input

8Ω

R L +-C B is optional

SHUTDOWN V IH

V IL

V DD /2

BL6211

C i

0.39μF C i 0.39μF

Figure4 Single-Ended Input Application