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 http://www.belling.com.cn -1- Total 10 Pages 8/14/2006 Wrote by 2006 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. http://www.belling.com.cn -2- Total 10 Pages 8/14/2006 Wrote by 2006 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 http://www.belling.com.cn f=217Hz (note1) -88 f=1kHz (note1) -83 f=217Hz (Note2) -83 F=1KHz (Note2) -83 -3- Total 10 Pages dB 8/14/2006 Wrote by 2006 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 http://www.belling.com.cn -4- Total 10 Pages 8/14/2006 Wrote by 2006 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 http://www.belling.com.cn -5- Total 10 Pages 8/14/2006 Wrote by 2006 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) http://www.belling.com.cn 100 1K 10K 20K Frequency (Hz) -6- Total 10 Pages 8/14/2006 Wrote by 2006 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) http://www.belling.com.cn 100 1K 10K 20K Frequency (Hz) -7- Total 10 Pages 8/14/2006 Wrote by 2006 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) http://www.belling.com.cn 1k 10k 100K 1M Phase (O) PSRR (dB) BL6211 -180 10M Frequency (Hz) -8- Total 10 Pages 8/14/2006 Wrote by 2006 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 http://www.belling.com.cn RL 8Ω Rf Differential Input Application With Input Capacitors -9- Total 10 Pages 8/14/2006 Wrote by 2006 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 http://www.belling.com.cn RL 8Ω Rf Single-Ended Input Application - 10 - Total 10 Pages 8/14/2006 Wrote by 2006