BL6282 1.7 Watt Audio Power Amplifier Features Improved PSRR at 217 Hz & 1 KHz 60 dB Power output at 5.0V, 10% THD+N, 4Ω 1.7 W (typ.) Power output at 5.0V, 1% THD+N, 8Ω 1.1 W (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 Packages: SOP8 General Description The BL6282 is a Class-AB audio power amplifier. It is capable of delivering 1.7 watts of continuous average power to an 4Ω BTL load with less than 10% distortion (THD+N) from a 5VDC power supply, or 1.1 watts continuous average power to an 8 Ω BTL load with less than 1% distortion. The BL6282 is 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. The BL6282 is ideally suited for audio speakers and other low voltage applications. With special pop-click eliminating circuit, the BL6282 provides perfect pop-click characteristic during turn-on and turn-off transitions. The BL6282 is unity-gain stable and can be configured by external gain-setting resistors. Applications Audio speakers Desktop computers Low voltage audio systems Pin Diagrams http://www.belling.com.cn -1- V1.0 BL6282 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 Shut-down Logical Control, ‘1’ is active. Analog ground for inner OPAs. It’s about a half of VDD. -2- V1.0 BL6282 Typical Application Circuit FIGURE 1. BL6282 Typical Application Circuit FIGURE 2. BL6282 Differential Amplifier Configuration http://www.belling.com.cn -3- V1.0 BL6282 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. The gain is AVD=2*(Rf/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 θJA(SOP8) 184℃/W Temperature Range Supply Voltage -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. 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 http://www.belling.com.cn Conditions Spec Min. Typ. Max. Units VIN = 0V, 8Ω Load 3.0 8 mA VIN = 0V, No Load 2.5 7 mA VIN=0V, VSHD=GND, No Load -4- 0.5 uA V1.0 BL6282 VSDIH Shutdown Voltage Input High VSDIL Shutdown Voltage Input Low VOS 1.2 Output Offset Voltage -50 THD+N Total Harmonic Distortion+Noise Po=0.5Wrms, PO Output Power PO Output Power f=1KHz, THD+N<=1%, f=1KHz, 8Ω Load THD+N<=10%, f=1KHz, 4Ω 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 V 6 0.9 V 50 mV 0.07 % 1.1 W 1.7 W 60 dB 61 dB 100 ms VDD = 3V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current VSDIH Shutdown Voltage Input High VSDIL Shutdown Voltage Input Low VOS Min. Power Supply Rejection Ratio 7 mA VIN = 0V, No Load 1.5 6 mA uA 1.0 -50 THD+N<=1%, f=1KHz, f=1KHz, 8Ω Load VDDRIPPLE=0.2VP-P, f=217Hz VDDRIPPLE=0.2VP-P, f=1KHz Wake-up time http://www.belling.com.cn 0.5 VIN=0V, VSHD=GND, No Load Input terminated with 10Ω, TWU Units 2 Input terminated with 10Ω, PSRR Max. 8Ω Load Output Offset Voltage Output Power Typ. VIN = 0V, THD+N Total Harmonic Distortion+Noise Po=0.25Wrms, PO Spec Conditions -5- V 6 0.7 V 50 mV 0.08 % 310 mW 57 dB 58 dB 75 ms V1.0 BL6282 Typical Performance Characteristics THDN_F THDN_F 2 2 1 1 0.5 0.5 0.2 0.2 % % 0.1 0.1 0.05 0.05 0.02 0.02 0.01 20 50 100 200 500 1k 2k 5k 10k 0.01 20 20k 50 100 200 500 Sweep Trace Color Line Style Thick Data 1 1 Cyan Solid 1 1k 2k 5k 10k 20k Hz Hz Axis Comment Sweep Trace Color Line Style Thick Data Analyzer.THD+N Ratio B Left 1 1 Cyan Solid THDN_F.ats2 1 Axis Comment Analyzer.THD+N Ratio B Left THDN_F.ats2 THDN vs Frequency THDN vs Frequency VDD=5V RL=8Ω PO=500 mW VDD=3V RL=8Ω PO=250mW 20 10 20 10 5 5 2 2 1 % 1 0.5 % 0.2 0.5 0.2 0.1 0.1 0.05 0.05 0.02 0.02 0.01 100m 200m 300m 400m 500m 600m 800m 0.01 100m 1 200m 300m W Sweep Trace Color Line Style Thick Data 1 1 Cyan Solid 1 Axis Comment Sweep Trace Color Line Style Thick Data Analyzer.THD+N Ratio B Left 1 1 Cyan Solid 1 thdn_po.ats2 THDN vs Output 500m 600m 700m 900m 1 Axis Comment Analyzer.THD+N Ratio B Left thdn_po.ats2 Power THDN VDD=5V RL=8Ω F=1KHz http://www.belling.com.cn 400m W vs Output Power VDD=3V RL=8Ω F=1KHz -6- V1.0 BL6282 PSRR_F +0 -20 -40 d B -60 -80 -100 -120 20 50 100 200 500 1k 2k 5k 10k 20k Hz Sweep Trace Color Line Style Thick Data 1 1 Cyan Solid 1 Axis Comment Analyzer.Crosstalk B Left psrr_f.ats2 THDN vs Output Power PSRR vs Frequency VDD=5V RL=4Ω F=1KHz VDD=5V RL=8Ω PSRR_F NOISE_F +0 100u -20 90u 80u -40 d B 70u 60u -60 V -80 50u 40u 30u -100 20u -120 20 10u 50 100 200 500 1k 2k 5k 10k 20k 20 Hz 50 100 200 500 1k 2k 5k 10k Hz Sweep Trace Color Line Style Thick Data 1 1 Cyan Solid 1 Axis Comment Sweep Trace Color Line Style Thick Data 1 Analyzer.Crosstalk B Left 1 Cyan Solid 1 Axis Comment Analyzer.Amplitude B Left NOISE_F.ats2 psrr_f.ats2 PSRR vs Frequency Noise Floor 20KBW VDD=3V RL=8Ω http://www.belling.com.cn VDD=5V RL=8Ω -7- V1.0 20k BL6282 SOP8 http://www.belling.com.cn -8- V1.0