G1438

Global Mixed-mode Technology Inc. G1438 2W Stereo Audio Amplifier with DC Volume Control and Selectable Gain Features „ 0dB ~-78dB Internal DC Volume Gain Setting Embedded „ Depop Circuitry Integrated „ Output Power at 1% THD+N, VDD=5V --2.0W/CH (typical) into a 4Ω Load --1.2W/CH (typical) into a 8Ω Load „ Bridge-Tied Load (BTL), Single-Ended (SE) „ PC-Beep Input „ Selectable Internal/External Gain Setting „ Shutdown Control Available „ Thermal Shutdown Protection „ Surface-Mount Power Package 28-Pin TSSOP-P / 28pin TQFN Available Applications „ Stereo Power Amplifiers for Notebooks or Desktop Computers „ Multimedia Monitors „ Stereo Power Amplifiers for Portable Audio Systems Ordering Information ORDER NUMBER G1438F4U G1438R6U Note: F4: TSSOP-28 (FD) U: Tape & Reel MARKING G1438 1438 R6 : TQFN5X5-28 Pin Configuration General Description The G1438 is a stereo audio power amplifier in both 28pin TSSOP and TQFN thermal pad package. It can deliver 2.0W continuous RMS power into 4Ω load per channel in Bridge-Tied Load (BTL) mode at 5V supply voltage. Its THD is smaller than 1% under the above operation condition. To simplify the audio system design in the notebook application, G1438 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. For the low current consumption applications, the Shutdown mode is supported to disable the G1438 when it is idle. The current consumption can be reduced below 2µA. The internal...