Document
®
Rev. 1.4
2.0Watt Audio Power Amplifier GENERAL DESCRIPTION
The LY8892 is a 2.0W audio power amplifier. It is capable of driving 4Ω speaker load at a continuous average output of 2.0W with less than 10% distortion (THD+N) from a 5.5V power supply and 8Ω speaker load at a continuous average output of 1.5W with less than 10% distortion (THD+N) from a 5.5V power supply. The LY8892 primarily designed for high quality application in other portable communication device. And the LY8892 audio amplifier features low power consumption shutdown mode. To facilitate this, The shutdown function may be enabled by either logic high or low depending on mode selection. Driving the shutdown mode pin either high or low enables the shutdown pin to be driven in a likewise manner to enable shutdown. And the LY8892 has an internal thermal shutdown protection feature. The LY8892 audio amplifier was designed specifically to provide high quality output power with a minimal amount of external components. The LY8892 does not require output capacitors, and the LY8892 is ideally suited for other low voltage applications or portable electronic devices where minimal power consumption is a primary requirement.
LY8892
FEATURES
2.5V~5.5V Power supply. Thermal shutdown Protection. Low current shutdown mode No output capacitors and networks or bootstrap capacitors required Low noise during turn-on and turn-off transitions User selectable shutdown logic level. (High or Low) (MSOP10 & DFN10 only) Lead free and green package available. (RoHS Compliant) Space Saving Package -- 8-pin MSOP package. -- 8-pin DFN Package -- 10-pin MSOP package. -- 10-pin DFN Package
APPLICATION
Portable electronic devices Mobile Phones PDAs
PIN CONFIGURATION
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Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 1
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
PIN DESCRIPTION
SYMBOL
SHUTDOWN
Pin No. MSOP8 1 2 -3 4 5 -6 7 8 DFN8 1 2 -3 4 5 -6 7 8 MSOP10 1 2 3 4 5 6 7 8 9 10 DFN10 1 2 3 4 5 6 7 8 9 10 Bypass pin
DESCRIPTION Shutdown the device Shutdown Mode Selectable Positive Input Negative Input Negative output No Connection Power Supply Ground Positive Output
BYPASS SD MODE +IN -IN Vo1 www.DataSheet4U.com NC VDD GND Vo2
Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 2
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
APPLICATION CIRCUIT
Figure 1. Application Schematic with Single –Ended Input (DFN10 and MSOP10 package)
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Figure 2. Application Schematic with Differential Input (DFN10 and MSOP10 package) Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 3
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
ABSOLUTE MAXIMUN RATINGS*
PARAMETER Supply Voltage Operating Temperature Input Voltage Storage Temperature Power Dissipation ESD Susceptibility Junction Temperature Soldering Temperature (under 10 sec) SYMBOL VDD TA VI TSTG PD VESD TJMAX TSOLDER RATING 6.0 -40 to 85 (I grade) -0.3V to VDD +0.3V -65 to 150 Internally Limited 2000 150 260 UNIT V ℃ V ℃ W V ℃ ℃
DC ELECTRICAL CHARACTERISTICS (VDD=5V, TA=25℃)
PARAMETER Power Supply Current Shutdown Current Shutdown Voltage Input High Shutdown Voltage Input Low Shutdown Voltage Input High Shutdown Voltage Input Low Output Offset Voltage Resistor Output to GND
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SYMBOL IDD ISD VSDIH VSDIL VSDIH VSDIL VOS ROUT-GND
TEST CONDITION VIN = 0V, IO = 0A, 8Ω Load VSHUTDOWN = VSD Mode VSD Mode = VDD VSD Mode = VDD VSD Mode = GND VSD Mode = GND
MIN. 7.0 -
TYP. 5.0 0.1 1.5 1.3 1.5 1.3 7.0 8.5 1.0 1.4 1.4 1.8 2.0 0.13 62 (f = 217Hz) 66 (f = 1kHz) 145 170 1.0
MAX. 15.0 2.0 50.0 9.7 -
UNIT mA µA V mV kΩ
Output Power
Total Harmonic Distortion+ Noise Power Supply Rejection Ratio Wake-up time Thermal Shutdown Temperature Shut Down Time
THD = 1% , f = 1 kHz RL=8Ω THD = 10% , f = 1 kHz RL=8Ω THD = 1% , f = 1 kHz Po RL=4Ω THD = 10% , f = 1 kHz RL=4Ω THD = 10% , f = 1 kHz RL=4Ω (at 5.5V) THD+N Po = 0.4 Wrms; f = 1kHz Vripple = 200mV sine p-p Input terminated with 10Ω PSRR to GND TWU TSD TSDT Bypass Cap.=1.0uF, 5.0V 8 Ω load
W
% dB
150
190
ms ℃ ms
Lyontek Inc. reserves the rights to change the specifications and products without notice. 5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan TEL: 886-3-6668838 FAX: 886-3-6668836 4
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
DC ELECTRICAL CHARACTERISTICS (VDD=3V, TA=25℃)
PARAMETER Power Supply Current Shutdown Current Shutdown Voltage Input High Shutdown Voltage Input Low .