LG GB130kf750, Service Manual

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3.5 Audio Amplifier (TPA6202A1)
Figure.3-5 TPA6202A1 FUNCTIONAL BLOCK DIAGRAM
FEATURES
· 1.25 W Into 8W From a 5-V Supply at THD = 1% (Typical)
· Shutdown Pin has 1.8V Compatible Threshold
· Low Supply Current: 1.7mA Typical
· Shutdown Current < 10 µ A
· Only Five External Components
–
Improved PSRR (90 dB) and Wide Supply Voltage (2.5V to 5.5V) for Direct Battery Operation
· Avaliable in a 2 mm x 2 mm MicroStar Junior™ BGA Package (ZQV
)
APPLICATIONS
· Designed for Wireless Handsets, PDAs, and other mobile devices
· Compatible with Low Power (1.8V Logic) I/O Threshold control signals
DESCRIPTION
The TPA6202A1 is a 1.25-W mono fully differential amplifier designed to drive a speaker with at
least 8- Ώ impedance while consuming less than 37 mm2 (ZQV package option) total printed-circuit
board (PCB) area in most applications. This device operates from 2.5 V to 5.5 V, drawing only 1.7
mA of quiescent supply current. The TPA6202A1 is available in the space-saving 2 mm x 2 mm
MicroStar Junior™ BGA package.
A fast start-up time of 4ms with minimal pop makes the TPA6202A1 ideal for wireless handsets.