CP2261 v1.0 product brief audio power amplifier series 2.8w/ch , stereo , fully differential audio power amplifier with internal feedback resistors copyright ?2008 chiphomer technology limited general description the CP2261 is a stereo fully differ ential audio power amplifier designed for demanding audio applications. it is capable of delivering 2.8 watt of continuous average power to a 3 ? load with less than 10% distortion (thd+n) from a 5v battery voltage. it operates from 2.2v to 5.5v. features like -85db psrr at 21 7hz, improved rf-rectification immunity, the space-saving qfn16 package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown mode make the CP2261 ideal for wireless handsets and notebook computers. qfn16 package 3mm 3mm -40 85 the CP2261 is unity-gain stable, and the gain can be configured by external input resistors and internal feedback resistors. features y fully differential amplifier y improved psrr at 217hz -85db (typ) y power output at 5.0v, 10% thd, 3 ? 2.8w (typ) y power output at 5.0v, 1% thd, 8 ? 1.25w (typ) y ultra low shutdown current 0.1 a (typ) y improved crosstalk at 5.0v -100db (typ) y improved pop & click circuitry eliminates noises during turn-on and turn-off transitions y thermal overload protection circuitry y operating from 2.2v to 5.5v y external gain conf iguration capability y available in space-saving qfn16 package y rohs compliant and 100% lead (pb)-free applications y wireless handsets y portable audio devices y pdas y notebook computers 1
CP2261 v1.0 product brief audio power amplifier series 2.8w/ch , stereo , fully differential audio power amplifier with internal feedback resistors copyright ?2008 chiphomer technology limited pin configurations qfn16 marking a61lq - CP2261lq xy - manufacture date code qfn16 package (top view) innr 2 inpr 1 innl 3 inpl 4 11 12 bypass 10 nc 9 nc shutdown 2
CP2261 v1.0 product brief audio power amplifier series 2.8w/ch , stereo , fully differential audio power amplifier with internal feedback resistors copyright ?2008 chiphomer technology limited typical application circuit 40k ? 40k ? r f r f r f 40k ? 40k ? r f bias circuitry bypass v ih v il v dd /2 8 ? r l 8 ? r l gnd gnd gnd shutdown innl inpl innr inpr CP2261 vonr vopr vopl vonl differential audio input 100k ? c i 0.22 f c i 0.22 f differential audio input c i 0.22 f c i 0.22 f v dd 1 f c s vdd vdd v dd 1 f c s r i 10k ? r i 10k ? r i 10k ? r i 10k ? c b 1 f contact with chiphomer 4f, building d, 1618 yishan road shanghai, 201103, p.r.c. tel: (86)21-64014543 64058488 fax: (86)21-64050030 sale: sales@chiphomer.com technical support: support@chiphomer.com web site: www.chiphomer.com shenzhen office: 10d, building 2, dushi yangguang garden chegongmiao, futian district, shenzhen, 518048, p.r.c. tel: (86)755-82046706 82047789 fax: (86)755-8204670 3
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