APA2036

APA2036 Stereo 2.6W Audio Power Amplifier Features General Description The APA2036 is a stereo audio power amplifier in a TQFN4x4-16 package. To simplify the audio system design in notebook computer applications, the APA2036 combines a stereo bridge-tied mode for speaker drive and a stereo single-end mode for headphone drive into a single chip, where both modes are easily switched by the SE/BTL input control pin signal. When the APA2036 is in the BTL mode with 5V supply voltage, it is capable of delivering 2.4W/2.0W/1.3W of continuous output power per channel into 3Ω/4Ω/8Ω load (Speaker) with less than 1% THD+N respectively. When the APA2036 operates in the single-ended mode, it is capable of delivering 160mW/ 85mW of continuous output power per channel into 16Ω / 32Ω load (Headphone). The APA2036 also serves low-voltage applications well. The APA2036, with 3.3V supply voltage, provides 900mW (at 1% THD+N) per channel into 4 Ω l oad. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in the APA2036. The depop function reduces pops and clicks noise during power on/off and enable/shutdown processes. The thermal protection protects the chip from being destroyed by over-temperature failure. For power sensitive applications, the APA2036 also features a shutdown function which reduces the supply current only 0.5µA (typical). THD+N vs. Output Power 10 • • • • Operating Voltage: 3.0 ~ 5.5V Low Shutdown Current – IDD= 0.5µA (typical) at VDD= 5V Selectable Bridge-Tied Load (BTL) or SingledEnded (SE) Operation Output Power (BTL) at 1% THD+N, VDD= 5V – 2.4W at RL = 3Ω – 2.0W at RL = 4Ω – 1.3W at RL = 8Ω Output Power (SE) at 1% THD+N, VDD= 5V – 160mW at RL = 16Ω – 85mW at RL = 32Ω Depop Circuitry Integrated Thermal and Over-Current Protections Short Circuit Protection Space Saving Packaging – 4mmx4mm 16-Lead Thin QFN Package (TQFN4X4-16) Lead Free Available (RoHS Compliant) • • • • • • • • • Applications Handsets Portable multimedia devices Notebooks Simplified Application Circuit LOUTP VDD=5V RL=4Ω Ci=1µF BW