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BL6211 1.25 Watt Fully Differential Audio Power Amplifier With Internal Feedback Resistors
Features
Fully differential amplifier Improved PSRR at 217Hz(VDD>3.0V) Power output at 5.0V & 1% THD Power output at 3.6V & 1% THD Ultra low shutdown current 86dB (typ) 1.25W (typ) 0.6W (typ) 0.01A (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
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BL6211
Pin Diagram (Top View)
9 Bump micro SMD Package (Top View) 9 Bump micro SMD Marking
3
IN+
VDD SHUTDOWN
2
VO1
GND
VO2
EG AAG
E - Die Run Traceability G - Date Code AAG - BL6211ITLX ROHS
1
IN-
GND
BYPASS
A
B
C
Mini Small O utline (MSO P8) Package (Top View)
SHUTDOWN BYP ASS IN+ IN1 2 3 4 8 7 6 5 VO2 GND VDD VO1
MSO P8 Marking
EG ABG
E - Die Run Traceability G - Date Code ABG - BL6211MM ROHS
Figure 1
Pin Diagram of BL6211
Pin Definitions and Functions
Table 1.
9-Bump micro SMD C3
Pin Definitions and Functions
MSOP8 1
Symbol SHUTDOWN
Type 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 4
A3 A1
IN+ IN-
I I
-2-
Positive differential input. Negative differential input.
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BL6211
MSOP8 5 6 7 8 9-Bump micro SMD A2 B3 B1,B2 C2 Symbol VO1 VDD GND VO2 Type O I I O Functions Positive differential output. Power supply Ground. Negative differential output.
Operation conditions and Electrical characteristics Operation Conditions
Table 2.
Parameter Power Supply Voltage Operating Temperature Range Symbol VDD TA
Operation Conditions
Min 2.2 -40
Typ
Max 5.5 85
Unit V
ctrical Characteristics
Table 3.
VDD=5V (The following specifications apply for 8loadAV=1V/VTA=25, unless otherwise specified.)
Parameter Quiescent Power Supply Current Shutdown Current Output Power Total Harmonic Distortion + Noise
Symbol
Conditions VIN=0V, no load
Min
Typ 2.5 4 0.01
Max 5
Unit
IDD VIN=0V, RL=8 ISD PO THD+N VSHUTDOWN=GND THD=1%(max); PO=0.6Wrms; f=1kHz 8 1
mA A W %
1.25 0.02
f=1kHz
Vripple=200mV sine p-p f=217Hz (note1) Power Supply Rejection Ratio PSRR f=1kHz (note1) f=217Hz (Note2) F=1KHz (Note2)
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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 CMRR VOS VSDIH Conditions f=217Hz VIN=0V 1.5 VCM=200mVPP Min Typ -78 2 8 Max Unit dB mV V
VSDIL 36k Ri 40k Ri
0.5 44k Ri
V
AV
V/V
Note1: Unterminated input Note2: 10terminated input
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BL6211
Table 4.
VDD=3.6V (The following specifications apply for 8loadAV=1V/VTA=25, unless otherwise specified.)
Parameter Quiescent Power Supply Current Shutdown Current Output Power Total Harmonic Distortion + Noise
Symbol
Conditions VIN=0V, no load
Min
Typ 2 3.5 0.01
Max 4.5
Unit
IDD VIN=0V, RL=8 ISD PO THD+N VSHUTDOWN=GND THD=1%(max); PO=0.4Wrms; f=1kHz 7.5 1
mA A W %
0.6 0.02
f=1kHz
Vripple=200mV sine p-p f=217Hz (note1) Power Supply Rejection Ratio PSRR f=1kHz (note1) f=217Hz (Note2) F=1KHz (Note2) Common Mode Rejection Ratio Output Offset Shutdown Voltage Input High Shutdown Voltage Input Low Closed Loop Gain CMRR VOS VSDIH f=217Hz VIN=0V 1.5 VCM=200mVPP -86 -83 -83 -83 -76 2 8 dB mV V dB
VSDIL 36k Ri 40k Ri
0.5 44k Ri
V
Gain
V/V
Note1: Unterminated input Note2: 10terminated input
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BL6211
Typical characteristics
Output Power vs Supply Voltage RL=8
2.0 1.8
0.6
Power Dissipation vs Output Power
0.7
Power Disspation(W)
1.6
Output Power(W)
1.4 1.2 THD+N=10% 1.0 THD+N=1% 800m 600m 400m
0.5
0.4 0.3 VDD=5V 0.2 0.1 f=1KHz THD+N 1% RL=8
200m 0 2.2
0
2.5
3
3.5
4
4.5
5
5.5
0
0.2
0.4
0.6
0.8
1.0
1.2
Supply Voltage(V)
Output Power(W)
Power Dissipation vs Output Power
0.35 0.7
Power Derating Curve
0.3
0.6
Power Disspation(W)
Power Disspation(W)
0.25
0.5
MSOP
0.2 0.15 VDD=3.6V f=1KHz THD+N 1% RL=8 0 0 0.2 0.4 0.6 0.8
0.4 0.3
0.1 0.05
0.2 Micro SMD 0.1
0 0 20 40 60 80 100 120 140 160
Output Power(W)
Ambient Temperature ()
THD+N vs Frequency VDD=5V, RL=8,PO=600mW
10 10
THD+N vs Frequency VDD=3.6V, RL=8,PO=400mW
1
1
THD+N (%)
0.1
THD+N (%)
20 100 1K 10K 20K
0.1
0.01
0.01
0.001
0.001 20 100 1K 10K 20K
Frequency (Hz)
Frequency (Hz)
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BL6211
THD+N vs Frequency VDD=2.5V, RL=8,PO=150mW
10
THD+N vs Output Power VDD=5V, RL=8
10
1
1
20kHz
THD+N (%)
THD+N (%)
0.1
0.1
1kHz
0.01
0.01
20Hz
0.001 20 100 1K 10K 20K
0.001 10m
100m
1
2
Frequency (Hz)
Output Power (W)
THD+N vs Output Power VDD=3.6V, RL=8
10 10
THD+N vs Output Power VDD=2.5V, RL=8
1
20kHz
1
20kHz
THD+N (%)
0.1
1kHz
THD+N (%)
0.1
1kHz
0.01
20Hz
0.01
20Hz
0.001 10m
100m
1
0.001 10m
100m
1
Output Power (W)
Output Power (W)
PSRR vs Frequency VDD=5.0V, RL=8,input 10 Terminated
0 -10 -20 -30
PSRR vs Frequency VDD=3.6V, RL=8,input 10 Terminated
0 -10 -20 -30
PSRR (dB)
-40 -50 -60 -70 -80 -90 -100 20 100 1K 10K 20K C(BYPASS)=0.47F C(BYPASS)=1F C(BYPASS)=0F
PSRR (dB)
-40 -50 -60 -70 -80 -90 -100 20 100 1K 10K 20K C(BYPASS)=0.47F C(BYPASS)=1F C(BYPASS)=0F
Frequency (Hz)
Frequency (Hz)
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BL6211
PSRR vs Common Mode voltage VDD=5.0V, RL=8, 217Hz, 200mVPP
0 -10 -20 -30
PSRR vs Common Mode voltage VDD=3.6V, RL=8, 217Hz, 200mVPP
0 -10 -20 -30
PSRR (dB)
-40 -50 -60 -70 -80 -90 -100 0 1 2 3 4 5
PSRR (dB)
-40 -50 -60 -70 -80 -90 -100 0 1 2 3 3.6
DC Common-Mode Voltage (V)
DC Common-Mode Voltage (V)
Open Loop Frequency Response
200 160 120 200 160 120 40 30 20
Closed Loop Frequency Response
220 Phase 180 140 100 Gain
Gain (dB)
Gain
Phase (O)
0 -40 -80 -120 -160 -200 100 1k 10k 100K 1M Phase
0 -40 -80 -120 -160 -200 10M
-10 -20 -30 -40 -50 -60 100 1k 10k 100K 1M
20 -20 -60 -100 -140 -180 10M
Frequency (Hz)
Frequency (Hz)
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Phase (O)
40
Gain (dB)
80
80 40
10 0
60
BL6211
Application
From Figure 3 to Figure 5 show application schematics for differential and single-ended inputs.
CS 1F VDD 20k Ri Differential Audio Input
Rf 40k
IN-
VIH VIL C B 1F C B is optional Ri 20k SHUTDOWN Bias VDD/2 Circuitry VO1
BYPASS
+ BL6211 VO2
RL 8
+
IN+ 40k Rf
GND
Figure 2
Typical Differential Input Application
CS 1F VDD 0.39F Ci Differential Audio Input 20k Ri
Rf 40k
IN-
VIH VIL C B 1F C B is optional Ci 0.39F Ri 20k SHUTDOWN Bias VDD/2 Circuitry VO1
BYPASS
+ BL6211 VO2
RL 8
+
IN+ 40k Rf
GND
Figure3
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Differential Input Application With Input Capacitors
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BL6211
CS 1F VDD 0.39F Ci 20k Ri
Rf 40k
Audio Input
IN-
VIH VIL C B 1F C B is optional SHUTDOWN Bias VDD/2 Circuitry VO1
BYPASS
+ BL6211 VO2
RL 8
+
IN+ 40k Rf
Ci 0.39F
Ri 20k
GND
Figure4
Single-Ended Input Application
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