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NCP2821 Datasheet(PDF) 1 Page - ON Semiconductor |
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© Semiconductor Components Industries, LLC, 2006 February, 2006 − Rev. 0 1 Publication Order Number: NCP2821/D NCP2821 2.65 W Filterless with Selectable Gain Class−D Audio Amplifier NCP2821 is a cost effective mono audio power amplifier designed for portable communication device applications such as mobile phones. The internal gain setting between 6 dB and 12 dB will also save external gain setting resistors. To achieve a typical audio mono application, you only need an external capacitor for filtering the power supply. The NCP2821 processes analog inputs with a PWM technique that lowers significantly output noise and THD. This part is capable of delivering 2.65 W of continuous average power to a 4.0 W BTL load from a 5.0 V power supply. Operating on a single 3 V supply, the output power stage can provide 500 mW to an 8.0 W BTL load with less than 1% THD+N. For cellular handsets or PDAs it offers space and cost savings because no output filter is required when using inductive transducers. Its improved Class−D technology makes it suitable for portable devices. With 90% efficiency and very low shutdown current, it increases widely the lifetime of your battery compared to a ClassAB solution. It also minimizes the junction temperature. It fully rejects “pop & click” noises with a fast start−up time of 9 ms. Added to a −65 dB PSRR, the NCP2821 audio power amplifier is specifically designed to provide high quality output power from low supply voltage, requiring only 1 external capacitor. Features • Optimized PWM Output Stage: Filterless Capability • Selectable Gain of 6 dB or 12 dB: No Need for External Gain Setting Resistors • Efficiency up to 90% and Low Quiescent Current Maximum Battery Life and Minimum Heat • High Output Power Capability: 1.4 W with 8.0 W Load • Wide Supply Voltage Range: 2.5−5.5 V Operating Voltage • High Performance, THD+N of 0.05% • Excellent PSRR (−65 dB): No Need for Voltage Regulation • Surface Mounted Package 9−Pin Flip−Chip CSP • Fully Differential Capability: No Need for Input Coupling Capacitor • Very Fast Turn On Time: 9.0 ms (typ) • “Pop and Click” Noise Protection Circuitry Applications • Cellular Phone • Personal Computer • PDAs • Portable Electronic Devices http://onsemi.com 9−PIN FLIP−CHIP CSP FC SUFFIX CASE 499AL 1 MARKING DIAGRAM MAU = Device Code A = Assembly Location Y = Year WW = Work Week G = Pb−Free Package MAU G AYWW A1 OUTM OUTP 1 mF GND SD INP INM VP Input from Micro controller Audio Input from DAC 2.7 mm 1.6 mm Solution Size Cs See detailed ordering and shipping information on page 18 of this data sheet. ORDERING INFORMATION PIN CONNECTIONS 9−Pin Flip−Chip CSP A3 B3 C3 A2 B2 C2 A1 B1 C1 GS INP OUTM VP SD OUTP GND INM VP (Top View) GS |
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