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Technical content

Features

„ 32 Steps DC Volume Control from +20dB ~-80dB „ Depop Circuitry Integrated „ Output Power at 1% THD+N, VDD=5V --1.9W/CH (typical) into a 4Ω Load --1.25W/CH (typical) into a 8Ω Load „ Output Power at 10% THD+N, VDD=5V --2.4W/CH (typical) into a 4Ω Load --1.55W/CH (typical) into a 8Ω Load „ Bridge-Tied Load (BTL) and Single-Ended (SE) Modes Supported „ Maximum Output Power Clamping Circuitry Integrated „ Ultra Low Shutdown Current „ Thermal Shutdown Protection „ SOP-16 Package Available

Applications

„ Notebooks „ LCD Monitor or TV General Description The G1450 is a stereo audio power amplifier with dc volume control in 16-pin SOP thermal pad package. It can deliver 1.9W continuous RMS power into 4 Ω 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 sys- tem design in the notebook application, the G1450 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. For the low current consumption applica- tions, the shutdown mode is supported to disable the G1450 when it is idle. The current consumption can be reduced below 1µA. The internal DC volume gain setting is ranged from +20dB to -80dB with 32 steps. It is easily to get the expected DC volume gain by applying the volume pin with a suitable dc voltage. The G1450 has embedded depop circuitry to suppress the power-on or power-off transition noises. It also supports the maximum output power clamping function to protect the speakers from burned-out. Thermal pro- tection circuitry is implemented to avoid unintentionally damaging.

Ordering Information

NUMBER MARKING TEMP. RANGE PACKAGE (Pb free) G1450F81U G1450 -40 °C to +85°C SOP-16 (FD) Note: F8: SOP-16 (FD) 1: Bonding Code U: Tape & Reel Pin Configuration Note : Recommend connecting the Thermal Pad to the GND for excellent power dissipation. VOLUME VDD LOUT- SE/BTL RIN- VDD ROUT- SHUTDOWN G1450 GND SOP-16 (FD) 8 9 BYPASS LIN- LOUT+ GND ROUT+ Thermal Pad VOLMAX MUTE VOLUME VDD LOUT- SE/BTL RIN- VDD ROUT- SHUTDOWN G1450 GND SOP-16 (FD) 8 9 BYPASS LIN- LOUT+ GND ROUT+ Thermal Pad VOLMAX MUTE