BELLING BL6211 1.25 watt fully differential audio power amplifier with internal feedback resistor Datasheet

BL6211
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 8Ω 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
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Total 10 Pages
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BL6211
Pin Diagram (Top View)
9 Bump micro SMD Package
(Top View)
3
IN+
VDD SHUTDOWN
2
VO1
GND
VO2
1
IN-
GND
BYPASS
A
B
C
9 Bump micro SMD Marking
EG
AAG
E - Die Run Traceability
G - Date Code
AAG - BL6211ITLX ROHS
Mini Small O utline (MSO P8) Package
(Top View)
SHUTDOWN
BYP ASS
IN+
IN-
1
8
2
7
3
6
4
5
MSO P8 Marking
VO2
EG
ABG
GND
VDD
VO1
E - Die Run Traceability
G - Date Code
ABG - BL6211MM ROHS
Figure 1
Pin Diagram of BL6211
Pin Definitions and Functions
Table 1.
MSOP8
1
9-Bump
micro SMD
C3
Pin Definitions and Functions
Symbol
Type
SHUTDOWN
I
Functions
Shutdown Pin, active low.
Common mode voltage. Connect a bypass
2
C1
BYPASS
I
capacitor to GND for common mode voltage
filtering. The bypass capacitor is optional.
3
A3
IN+
I
Positive differential input.
4
A1
IN-
I
Negative differential input.
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BL6211
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.
8
C2
VO2
O
Negative differential output.
Operation conditions and Electrical characteristics
Operation Conditions
Table 2.
Operation Conditions
Parameter
Symbol
Min
Power Supply Voltage
VDD
TA
Operating Temperature
Range
Typ
Max
Unit
2.2
5.5
V
-40
85
℃
ctrical Characteristics
Table 3.
VDD=5V (The following specifications apply for 8Ω
Ωload,
,AV=1V/V,
,TA=25℃
℃,
unless otherwise specified.)
Parameter
Quiescent Power
Supply Current
Symbol
IDD
Conditions
Typ
Max
VIN=0V, no load
2.5
5
VIN=0V, RL=8Ω
4
8
0.01
1
ISD
VSHUTDOWN=GND
Output Power
PO
THD=1%(max);
THD+N
PO=0.6Wrms;
Distortion + Noise
Unit
mA
Shutdown Current
Total Harmonic
Min
f=1kHz
f=1kHz
µA
1.25
W
0.02
%
Vripple=200mV sine p-p
Power Supply
Rejection Ratio
PSRR
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f=217Hz (note1)
-88
f=1kHz (note1)
-83
f=217Hz (Note2)
-83
F=1KHz (Note2)
-83
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dB
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BL6211
Parameter
Common Mode
Rejection Ratio
Output Offset
Shutdown Voltage
Input High
Shutdown Voltage
Input Low
Closed Loop Gain
Symbol
Conditions
CMRR
f=217Hz
VOS
VIN=0V
Min
VCM=200mVPP
Typ
-78
2
VSDIH
Max
dB
8
mV
1.5
V
VSDIL
0.5
AV
Unit
V
36kΩ
40kΩ
44kΩ
Ri
Ri
Ri
V/V
Note1: Unterminated input
Note2: 10Ωterminated input
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BL6211
Table 4.
VDD=3.6V (The following specifications apply for 8Ω
Ωload,
,AV=1V/V,
,TA=25℃
℃,
unless otherwise specified.)
Parameter
Quiescent Power
Supply Current
Symbol
IDD
Conditions
Typ
Max
VIN=0V, no load
2
4.5
VIN=0V, RL=8Ω
3.5
7.5
0.01
1
ISD
VSHUTDOWN=GND
Output Power
PO
THD=1%(max);
THD+N
PO=0.4Wrms;
Distortion + Noise
Unit
mA
Shutdown Current
Total Harmonic
Min
f=1kHz
f=1kHz
µA
0.6
W
0.02
%
Vripple=200mV sine p-p
Power Supply
Rejection Ratio
Common Mode
Rejection Ratio
Output Offset
Shutdown Voltage
Input High
Shutdown Voltage
Input Low
Closed Loop Gain
PSRR
f=217Hz (note1)
-86
f=1kHz (note1)
-83
f=217Hz (Note2)
-83
F=1KHz (Note2)
-83
CMRR
f=217Hz
VOS
VIN=0V
VCM=200mVPP
dB
-76
2
dB
8
mV
1.5
VSDIH
V
0.5
VSDIL
Gain
V
36kΩ
40kΩ
44kΩ
Ri
Ri
Ri
V/V
Note1: Unterminated input
Note2: 10Ωterminated input
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BL6211
Typical characteristics
Output Power vs Supply Voltage
RL=8Ω
Power Dissipation vs Output Power
2.0
0.7
1.8
0.6
Power Disspation(W)
Output Power(W)
1.6
1.4
1.2
THD+N=10%
1.0
THD+N=1%
800m
600m
0.5
0.4
0.3
VDD=5V
f=1KHz
0.2
THD+N ≤1%
400m
RL=8Ω
0.1
200m
0
2.2
0
2.5
3
3.5
4
4.5
5
0
5.5
0.2
Supply Voltage(V)
0.3
0.6
0.25
0.2
0.15
VDD=3.6V
1.2
0.4
0.3
Micro SMD
0.1
RL=8Ω
0
0.2
0.4
0.6
0
0.8
0
20
40
60
80
100
120
140
160
Ambient Temperature (℃)
Output Power(W)
THD+N vs Frequency
VDD=5V, RL=8Ω,PO=600mW
THD+N vs Frequency
VDD=3.6V, RL=8Ω,PO=400mW
10
10
1
1
THD+N (%)
THD+N (%)
1.0
MSOP
0.5
THD+N ≤1%
0
0.8
0.2
f=1KHz
0.05
0.6
Power Derating Curve
0.7
Power Disspation(W)
Power Disspation(W)
Power Dissipation vs Output Power
0.35
0.1
0.4
Output Power(W)
0.1
0.01
0.1
0.01
0.001
0.001
20
100
1K
10K 20K
20
Frequency (Hz)
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100
1K
10K 20K
Frequency (Hz)
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BL6211
THD+N vs Output Power
VDD=5V, RL=8Ω
10
10
1
1
20kHz
0.1
1kHz
THD+N (%)
THD+N (%)
THD+N vs Frequency
VDD=2.5V, RL=8Ω,PO=150mW
0.1
0.01
0.01
0.001
10m
0.001
20
100
1K
20Hz
10K 20K
100m
THD+N vs Output Power
VDD=3.6V, RL=8Ω
10
1
20kHz
0.1
1kHz
THD+N (%)
THD+N (%)
2
THD+N vs Output Power
VDD=2.5V, RL=8Ω
10
20Hz
0.01
1
20kHz
0.1
1kHz
0.01
0.001
10m
100m
20Hz
0.001
10m
1
100m
Output Power (W)
PSRR vs Frequency
VDD=3.6V, RL=8Ω,input 10Ω Terminated
0
-10
-10
-20
-20
-30
-30
PSRR (dB)
0
-40
-50
-60
1
Output Power (W)
PSRR vs Frequency
VDD=5.0V, RL=8Ω,input 10Ω Terminated
PSRR (dB)
1
Output Power (W)
Frequency (Hz)
-40
-50
-60
C(BYPASS)=0μF
-70
C(BYPASS)=0μF
-70
C(BYPASS)=0.47μF
-80
-90
C(BYPASS)=0.47μF
-80
-90
C(BYPASS)=1μF
-100
C(BYPASS)=1μF
-100
20
100
1K
10K 20K
20
Frequency (Hz)
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100
1K
10K 20K
Frequency (Hz)
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PSRR vs Common Mode voltage
VDD=5.0V, RL=8Ω, 217Hz, 200mVPP
PSRR vs Common Mode voltage
VDD=3.6V, RL=8Ω, 217Hz, 200mVPP
0
0
-10
-10
-20
-20
-30
-30
PSRR (dB)
-40
-50
-40
-50
-60
-60
-70
-70
-80
-80
-90
-90
-100
-100
0
1
2
3
4
5
0
1
DC Common-Mode Voltage (V)
200
40
160
160
30
120
120
20
80
80
10
Gain
40
0
180
140
100
Gain
0
60
20
-20
-20
-80
-30
-60
-40
-80
Phase
220
Phase
-10
-40
-120
Gain (dB)
200
0
3.6
3
Closed Loop Frequency Response
Phase (O)
Gain (dB)
Open Loop Frequency Response
40
2
DC Common-Mode Voltage (V)
-120
-40
-100
-160
-160
-50
-140
-200
-200
10M
-60
100
1k
10k
100K
1M
100
Frequency (Hz)
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1k
10k
100K
1M
Phase (O)
PSRR (dB)
BL6211
-180
10M
Frequency (Hz)
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Total 10 Pages
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BL6211
Application
From Figure 3 to Figure 5 show application schematics for differential and single-ended inputs.
CS
1μF
VDD
Differential Audio Input
20kΩ
Ri
Rf
40kΩ
IN-
VO1
VIH
SHUTDOWN
VIL
C B 1μF
C B is optional
Ri
+
BL6211
-
Bias VDD/2
Circuitry
BYPASS
VO2
+
IN+
40kΩ
20kΩ
GND
Figure 2
RL
8Ω
Rf
Typical Differential Input Application
CS
1μF
VDD
Differential Audio Input
0.39μF
Ci
20kΩ
Ri
Rf
40kΩ
IN-
VO1
VIH
SHUTDOWN
VIL
C B 1μF
C B is optional
Ci
0.39μF
Ri
+
BL6211
-
Bias VDD/2
Circuitry
BYPASS
VO2
+
IN+
40kΩ
20kΩ
GND
Figure3
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RL
8Ω
Rf
Differential Input Application With Input Capacitors
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Total 10 Pages
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BL6211
CS
1μF
VDD
Audio
Input
0.39μF
Ci
20kΩ
Ri
Rf
40kΩ
IN-
VO1
VIH
SHUTDOWN
VIL
C B 1μF
C B is optional
Ci
0.39μF
Ri
+
BL6211
-
Bias VDD/2
Circuitry
BYPASS
VO2
+
IN+
40kΩ
20kΩ
GND
Figure4
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RL
8Ω
Rf
Single-Ended Input Application
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Total 10 Pages
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