BL6289 1.20 Watt Audio Power Amplifier Version 1.1 May 11, 2009, Features Improved PSRR at 217 Hz & 1 KHz 64 dB Power output at 5.0V, 1% THD+N, 8Ω 1.20 W (typ.) Power output at 3.0V, 1% THD+N, 8Ω 450 mW (typ.) Ultra low shutdown current 0.1 uA (typ.) 2.2V – 5.5V operation Improved circuitry eliminates pop-click noise during turn-on and turn-off transitions No output coupling capacitors, snubber networks or bootstrap capacitors required Unity-gain stable External gain configuration capability Available in space-saving packages: MSOP8 General Description The BL6289 is a Class-AB audio power amplifier designed for mobile phones and other portable communication devices. It is capable of delivering 1.20 watts of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The BL6289 was designed specifically to provide high quality output power with a minimal amount of external components. It does not require output coupling capacitors or bootstrap capacitors. And with ultra low shutdown current, the BL6289 is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. With special pop-click eliminating circuit, the BL6289 provides perfect pop-click characteristic during turn-on and turn-off transitions. The BL6289 is unity-gain stable and can be configured by external gain-setting resistors. Applications Wireless handsets Portable electronic devices PDAs, Handheld computers http://www.belling.com.cn -1- Total 1 Pages BL6289 Pin Diagrams Mini Small Outline Package (MSOP8) (Top View) SHD BP INP INN 1 8 2 7 3 6 4 5 MSOP8 Marking (Top View) Vout2 YWK BDG GND VDD Y – Year Code WK - Week Code BDG - BL6289 MSOP8 ROHS Vout1 Pin Description No. Pin Name I/O 1 SHD I 2 BP I/O 3 INP I Positive Input 4 INN I Negative Input 5 Vout1 O Negative BTL Output 6 VDD I/O Power Supply (2.2 – 5.5 V) 7 GND I/O Ground 8 Vout2 O Positive BTL Output http://www.belling.com.cn Description Shout-down Logical Control, ‘0’ is active. Analog ground for inner OPAs. It’s about a half of VDD. -2- Total 2 Pages BL6289 Typical Application Circuit Rf = 20 kΩ Audio In Ri = 20 kΩ INN Vout1 Ci = 0.39 µF 20 kΩ INP 20 kΩ RL Vout2 BIAS VDD VDD Cs = 1 µF GND Pop-Click Cb = 1 µF BP Temp_Prt SHD Shudown Control FIGURE 1. BL6289 Typical Application Circuit Rf = 20 kΩ Ci = 0.39 µF Ri = 20 kΩ INN Vout1 Audio In 20 kΩ INP Ci = 0.39 µF Ri = 20 kΩ 20 kΩ RL 20 kΩ Vout2 BIAS VDD VDD Temp_Prt Cs = 1 µF GND Pop-Click Cb = 1 µF BP SHD Shudown Control FIGURE 2. BL6289 Differential Amplifier Configuration http://www.belling.com.cn -3- Total 3 Pages BL6289 External Components Description Components Functional Description Ri Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a high pass filter with Ci at fc = 1/(2πRi*Ci). Ci Input coupling capacitor which blocks the DC voltage at the amplifiers input terminates. Also creates a high-pass filter with Ri at fc = 1/(2πRi*Ci). Rf Feedback resistance which sets the closed-loop gain in conjunction with Ri. Cs Supply bypass capacitor which provides power supply filtering. Cb Bypass pin capacitor which provides half-supply filtering. Refer to the section. Absolute Maximum Ratings Operating Ratings Supply Voltage -0.3V to 6V Input Voltage -0.3V to VDD+0.3V Power Dissipation See Dissipation Rating Table ESD Susceptibility (Human body model) 2000V Junction Temperature -40℃ to +150℃ Storage Temperature -65℃ to +150℃ Thermal Resistance θJC(MSOP8) 56℃/W θJA(MSOP8) 190℃/W θJA(9-BUMP) 180℃/W Temperature Range Supply Voltage http://www.belling.com.cn -40℃≦TA≦85℃ 2.2V≦VDD≦5.5V NOTE: Absolute Maximum Ratings indicate limits beond which damage to the device may occur. Operating Rating indicate conditions for which the device is functional, but do not guarantee specific performance limits. -4- Total 4 Pages BL6289 Electrical Characteristics The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA = 25℃. VDD = 5V Spec Symbol IDD ISD Parameter Quiescent Power Conditions Supply Current Mi n. Max. Units VIN = 0V, 8Ω Load 4 8 mA VIN = 0V, No Load 3.6 7 mA 0.1 2 uA VIN=0V, VSHD=GND, No Shutdown Current Typ. Load VSDIH Shutdown Voltage Input High 0.93 V VSDIL Shutdown Voltage Input Low 0.76 V VOS THD+N PO -50 Output Offset Voltage Total Harmonic Distortion+Noise Po=0.5Wrms, THD+N<=1%, Output Power f=1KHz, Input terminated with 10Ω, PSRR Power Supply Rejection Ratio VDDRIPPLE=0.2VP-P, f=217Hz Input terminated with 10Ω, VDDRIPPLE=0.2VP-P, f=1KHz TWU Wake-up time ROUT Resistor Output to GND 50 mV 0.06 % 0.9 1.20 W 55 61 dB 55 62 dB 106 ms f=1KHz, 8Ω Load 6 5.8 8.3 10 kΩ VDD = 3V Spec Symbol IDD ISD Parameter Quiescent Power Conditions Supply Current Mi n. Max. Units VIN = 0V, 8Ω Load 3.3 7 mA VIN = 0V, No Load 3.2 6 mA 0.1 2 uA VIN=0V, VSHD=GND, No Shutdown Current Typ. Load VSDIH Shutdown Voltage Input High 0.85 V VSDIL Shutdown Voltage Input Low 0.69 V VOS THD+N -50 Output Offset Voltage Total Distortion+Noise http://www.belling.com.cn Harmonic Po=0.25Wrms, -5- f=1KHz, 6 0.05 50 mV % Total 5 Pages BL6289 PO THD+N<=1%, Output Power f=1KHz, Input terminated with 10Ω, PSRR 450 mW 55 64 dB 55 65 dB 78 ms 8Ω Load Power Supply Rejection Ratio VDDRIPPLE=0.2VP-P, f=217Hz Input terminated with 10Ω, VDDRIPPLE=0.2VP-P, f=1KHz TWU Wake-up time ROUT Resistor Output to GND 5.8 8.3 10 kΩ VDD = 2.6V Spec Symbol IDD Parameter Quiescent Power Shutdown Current VOS Output Offset Voltage PO Supply Current ISD THD+N Conditions Total mA VIN = 0V, No Load 2.4 mA 0.1 uA -50 Harmonic Power Supply Rejection Ratio Po=0.15Wrms, THD+N<=1%, Wake-up time ROUT Resistor Output to GND http://www.belling.com.cn mW 55 63 dB 55 63 dB 70 ms 5.8 -6- mV 330 8Ω Load Input terminated with 10Ω, 50 % f=1KHz, VDDRIPPLE=0.2VP-P, f=217Hz 4 0.05 f=1KHz, VDDRIPPLE=0.2VP-P, f=1KHz TWU Units 2.6 Load Output Power Max. 8Ω Load VIN=0V, VSHD=GND, No Distortion+Noise Typ. VIN = 0V, Input terminated with 10Ω, PSRR Mi n. 8.3 10 kΩ Total 6 Pages BL6289 Typical Performance Characteristics http://www.belling.com.cn -7- Total 7 Pages BL6289 http://www.belling.com.cn -8- Total 8 Pages BL6289 http://www.belling.com.cn -9- Total 9 Pages BL6289 http://www.belling.com.cn - 10 - Total 10 Pages BL6289 Package Dimensions MSOP8 All dimension values are in millimeter. http://www.belling.com.cn - 11 - Total 11 Pages