LPA2010SMSF

The LPA2010S is a 3-W high efficiency filter-free mono class-D audio power amplifier (class-D amp) that requires only few external components. Its low total harmonic distortion plus noise (THD+N) feature offers high-quality sound reproduction. The new filterless architecture allows the device to drive speakers directly instead of using low-pass output filters thus saving PCB area and system cost. The LPA2010S contains circuitry to prevent “pop and click” noise that would occur during turn-on and turn-off transitions. For maximum flexibility, the LPA2010S provides an externally controlled gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor). The LPA2010S is capable of delivering 2.8W of continuous average power to a 4Ω load from a 5V power supply with less than 10% distortion (THD+N). The device utilizes a fully differential architecture, a full-bridged output, and a low-EMI modulation scheme. The LPA2010S is designed specifically to provide high quality output audio power with a minimal number of external components. The LPA2010S does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited where minimal board or solution size is a primary requirement. It features a low-power shutdown mode, which is achieved by driving the SD pin with logic low. Additionally, the LPA2010S features output short-circuit protection and internal thermal-overload protection. The LPA2010S is available in a MSOP8&DFN-8 package.

Applications

• GPS Tracker
• PSP
• BT Speaker
• Portable Electronic Devices

Key features

• 2.5 - 5.5V Operation Voltage
• 4.5 mA Quiescent Current
• < 1 μA Shutdown Current
• Maximum Battery Life and Minimum Heat: up to 87% efficiency at 1.7W
• 500kHz fixed frequency switching
• Optimized PWM Output Stage Eliminates LC Output Filter
• Low EMI
• External Gain Configuration Capability
• Short Circuit Protection
• RoHS Compliant and 100% Lead(Pb)-Free
• Package: MSOP8/DFN-8（(2 x 2 mm)）