BL6290 1.25 Watt Audio Power Amplifier Version 1.1 Mar. 12, 2009, Features Improved PSRR at 217 Hz & 1 KHz 62 dB Power output at 5.0V, 1% THD+N, 8Ω 1.25 W (typ.) Power output at 3.0V, 1% THD+N, 8Ω 410 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、SOP8 General Description The BL6290 is a Class-AB audio power amplifier designed for mobile phones and other portable communication devices. It is capable of delivering 1.25 watts of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The BL6290 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 BL6290 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 BL6290 provides perfect pop-click characteristic during turn-on and turn-off transitions. The BL6290 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 11 Pages BL6290 Pin Diagrams Pin Description No. Pin Name 1 I/O I Description Shout-down Logical Control, ‘0’ is active. 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 Analog ground for inner OPAs. It’s about a half of VDD. -2- Total 11 Pages BL6290 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. BL6290 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. BL6290 Differential Amplifier Configuration http://www.belling.com.cn -3- Total 11 Pages BL6290 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 Junction Temperature -40℃ to +150℃ Storage Temperature -65℃ to +150℃ Thermal Resistance θJC(MSOP8) 56℃/W θJA(MSOP8) 190℃/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 11 Pages BL6290 Electrical Characteristics The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for TA = 25℃. VDD = 5V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current Spec Conditions Min. Typ. Max. Units VIN = 0V, 8Ω Load 3.0 8 mA VIN = 0V, No Load 2.5 7 mA 0.1 2 uA VIN=0V, VSHD=GND, No Load VSDIH Shutdown Voltage Input High 1.58 V VSDIL Shutdown Voltage Input Low 1.36 V VOS -50 Output Offset Voltage THD+N Total Harmonic Distortion+Noise Po=0.5Wrms, PO Output Power f=1KHz, f=1KHz, THD+N<=1%, 8Ω Load 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 6 50 mV 0.04 % 0.9 1.25 W 55 61 dB 55 64 dB 100 ms 5.8 8.3 10 kΩ VDD = 3V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current Spec Conditions Min. Typ. Max. Units VIN = 0V, 8Ω Load 2.4 7 mA VIN = 0V, No Load 2.0 6 mA 0.1 2 uA VIN=0V, VSHD=GND, No Load VSDIH Shutdown Voltage Input High 1.27 V VSDIL Shutdown Voltage Input Low 1.08 V VOS -50 Output Offset Voltage THD+N Total Harmonic Distortion+Noise Po=0.25Wrms, PO Output Power THD+N<=1%, f=1KHz, PSRR Power Supply Rejection Ratio Input terminated with 10Ω, VDDRIPPLE=0.2VP-P, f=1KHz TWU Wake-up time ROUT Resistor Output to GND http://www.belling.com.cn 410 mW 55 62 dB 55 68 dB 75 ms 5.8 -5- mV % 8Ω Load VDDRIPPLE=0.2VP-P, f=217Hz 50 0.05 f=1KHz, Input terminated with 10Ω, 6 8.3 10 kΩ Total 11 Pages BL6290 VDD = 2.6V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current Spec Conditions Min. Typ. Max. Units VIN = 0V, 8Ω Load 2.3 mA VIN = 0V, No Load 2.2 mA 0.1 uA VIN=0V, VSHD=GND, No Load VSDIH Shutdown Voltage Input High 1.20 V VSDIL Shutdown Voltage Input Low 1.01 V VOS -50 Output Offset Voltage THD+N Total Harmonic Distortion+Noise Po=0.15Wrms, PO Output Power THD+N<=1%, f=1KHz, PSRR Power Supply Rejection Ratio Input terminated with 10Ω, VDDRIPPLE=0.2VP-P, f=1KHz TWU Wake-up time ROUT Resistor Output to GND http://www.belling.com.cn 300 mW 51 58 dB 51 59 dB 70 ms 5.8 -6- mV % 8Ω Load VDDRIPPLE=0.2VP-P, f=217Hz 50 0.06 f=1KHz, Input terminated with 10Ω, 4 8.3 10 kΩ Total 11 Pages BL6290 Typical Performance Characteristics http://www.belling.com.cn -7- Total 11 Pages BL6290 http://www.belling.com.cn -8- Total 11 Pages BL6290 http://www.belling.com.cn -9- Total 11 Pages BL6290 http://www.belling.com.cn - 10 - Total 11 Pages BL6290 Package Dimensions MSOP8 All dimension values are in millimeter. SOP8 http://www.belling.com.cn - 11 - Total 11 Pages