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SGM4890 Datasheet(PDF) 1 Page - SG Micro Corp |
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SGM4890 Datasheet(HTML) 1 Page - SG Micro Corp |
1 / 9 page SGM4890 GENERAL DESCRIPTION The SGM4890 is a 1.1-W, fully integrated, audio power amplifier. It is designed to maximize audio performance in portable applications such as mobile phone. The portable application requires audio power amplifier has minimum of external components and can operate from a single 2.5V to 5.5V power supply. SGM4890 is capable of delivering 1.1W of continuous output power with less than 1% distortion(THD + N)when it drives an 8Ω speaker from a 5.0V power supply. The SGM4890 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. Additionally, the SGM4890 features an internal thermal shutdown protection mechanism. The SGM4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. For maximum flexibility, the SGM4890 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on time (with the bypass capacitor). When using a 1µF bypass capacitor, it offers 110ms wake up time when V+ is equal to 5.0V. The SGM4890 is available in CSP-9 and MSOP-8 packages. It operates over an ambient temperature range of –40℃ to +85℃. APPLICATIONS Portable Systems MP3 Players Mobile Phone PDAs GPS 1.1 Watt Audio Power Amplifier FEATURES • Ideal for Notebook Computers, PDAs, and Other Small Portable Audio Devices • 1.1W to 8-Ω BTL Load from 5V Supply at THD =1% (Typical) • Excellent PSRR: Direct Connection to the Battery • Fast Turn On Time • Unity Gain Stable • 2.5V to 5.5V Operation • Shutdown Current: 0.01µA Typical • Shutdown Pin is Compatible with 1.8V Logic • –40℃ to +85℃ Operating Temperature Range • Small Packaging PIN CONFIGURATIONS (Top View) 12 3 A B C V+ -IN +IN GND GND VO1 VO2 Bypass SHDN 1 2 3 4 5 6 7 8 MSOP-8 SHDN Bypass -IN +IN VO1 VO2 V+ GND CSP-9 REV. A SG Microelectronics Co, Ltd Tel: 86/10/51798160/80 www.sg-micro.com |
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