Leshan Radio Co ., Ltd 1.28 Watt Audio Power Amplifier LR6212 Features Improved PSRR at 217 Hz & 1 KHz 62 dB Power output at 5.0V, 1% THD+N, 8Ω 1.28 W (typ.) Power output at 3.0V, 1% THD+N, 8Ω 440 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, 9-BUMP WLCSP General Description The LR6212 is a Class-AB audio power amplifier designed for mobile phones and other portable communication devices. It is capable of delivering 1.28 watts of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. The LR6212 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 LR6212 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 LR6212 provides perfect pop-click characteristic during turn-on and turn-off transitions. The LR6212 is unity-gain stable and can be configured by external gain-setting resistors. Applications Wireless handsets Portable electronic devices PDAs, Handheld computers 1/10 Leshan Radio Co ., Ltd Pin Diagrams Y - Year Code WK - Week Code BAG-LR62129-BUMP ROHS Pin Description No. Pin Name I/O I 1 Description Shout-down Logical Control, ‘0’ is active. 2 BP I/O Analog ground for inner OPAs. It’s about a half of VDD. 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 2/10 Leshan Radio Co ., Ltd Typical Application Circuit FIGURE 1. LR6212 Typical Application Circuit FIGURE 2. LR6212 Differential Amplifier Configuration 3/10 Leshan Radio Co ., Ltd 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) 4000V 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 -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 Conditions Spec Min. Typ. Max. Units VIN = 0V, 8Ω Load 2.4 8 mA VIN = 0V, No Load 2.1 7 mA VIN=0V, VSHD=GND, No Load 0.1 2 uA VSDIH Shutdown Voltage Input High 1.58 V VSDIL Shutdown Voltage Input Low 1.36 V VOS Output Offset Voltage -50 6 50 mV 4/10 Leshan Radio Co ., Ltd THD+N Total Harmonic Distortion+Noise Po=0.5Wrms, PO Output Power f=1KHz, THD+N<=1%, f=1KHz, 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 0.04 % 0.9 1.28 W 55 60 dB 55 64 dB 100 ms 5.8 7.3 9.7 kΩ VDD = 3V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current Spec Conditions Min. Typ. Max. Units VIN = 0V, 8Ω Load 1.9 7 mA VIN = 0V, No Load 1.7 6 mA VIN=0V, VSHD=GND, No Load 0.1 2 uA 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 f=1KHz, THD+N<=1%, PSRR Power Supply Rejection Ratio Input terminated with 10Ω, VDDRIPPLE=0.2VP-P, f=1KHz TWU Wake-up time ROUT Resistor Output to GND mV % 440 mW 55 62 dB 55 68 dB 75 ms 8Ω Load VDDRIPPLE=0.2VP-P, f=217Hz 50 0.06 f=1KHz, Input terminated with 10Ω, 6 5.8 7.3 9.7 kΩ VDD = 2.6V Symbol Parameter IDD Quiescent Power Supply Current ISD Shutdown Current Conditions Spec Min. Typ. Max. Units VIN = 0V, 8Ω Load 1.7 mA VIN = 0V, No Load 1.47 mA VIN=0V, VSHD=GND, No Load 0.1 uA 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, f=1KHz, 4 0.08 50 mV % 5/10 Leshan Radio Co ., Ltd PO Output Power THD+N<=1%, 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 320 mW 51 56 dB 51 59 dB 70 ms 8Ω Load 5.8 7.3 9.7 kΩ Typical Performance Characteristics 6/10 Leshan Radio Co ., Ltd 7/10 Leshan Radio Co ., Ltd 8/10 Leshan Radio Co ., Ltd 9/10 Leshan Radio Co ., Ltd Package Dimensions MSOP8 All dimension values are in millimeter. 9 Bump WLCSP Dimensions (mm) REF MIN TYP MAX A1 0.215 0.235 0.255 A2 0.355 0.380 0.405 A3 0.020 0.035 0.050 D 1.485 1.500 1.515 D1 E 0.500 1.485 E1 b CCC 1.500 1.515 0.500 0.300 0.320 0.340 0.080 10/10