Audio Amplifier Stage With Azad2102(U163, U164); General Description; Features - Sharp LC-40SH340K Service Manual

LC-40SH340E
LC-40SH340K

5. AUDIO AMPLIFIER STAGE WITH AZAD2102(U163, U164)

5.1.General Description

17MB60 uses two 2,5W Class D Mono Audio Amplifers for from 16" to 24" TVs. AZAD2102B is a 2.9 Watts
PD[ FDQ RIIHU  :DWWV # /RDG
class-D audio power amplifier in a 1613 mm x 1613 mm wafer chip scale package (WCSP). AZAD2102B uses
Current-switch technology to achieve high performance class-d amplifier that features 0.03% THD, 85%
efficiency, –70 dB PSRR, to improve RF-rectification immunity. AZAD2102B provide a Vibration-Spectrum
modulation clock for PWM Output. This vibration frequency is around 10KHZ shift (+/- 5KHZ of Fpwm).
The advantage of the small size package (WCSP) makes AZAD2102B very suitable for mobile phone and
PDA device application. And the Class-D amplifier structure let AZAD2102B to have highly efficiency
power consumption than Class-AB amplifier. AZAD2102B can shrink the application board, reduce system
cost, and external components.
ESD level protection I/O embedded in AZAD2102B. For general applications, doesn't need to add extra
ESD protection device (like Varistors) in application system for AZAD2102B's I/O.

5.2.Features

x
CMOS Technology
x
High Efficiency 85%
x
High PSRR 70dB at 217Hz
x
Differential OP-amp Input
x
AZAD2102B provides Vibration-Spectrum Modulation clock for reduce EMI
x
Provide Mute function(set Mute_B to GND will go into Mute status)
x
For the input stage AZAD2102B built-in a 10Kohm resistors (Gain setting=29.5dB)
x
Maximum Battery Life and Minimum Heat
x
Efficiency With an 8-Ÿ 6SHDNHU
x
3.5 mA Quiescent Current
x
Output Power at 10% THD
x
:DWWV DW $9GG '9GG 9ROW 5ORDG Ÿ
x
1.45Watts at $9GG '9GG 9ROW 5ORDG Ÿ
x
:DWWV DW $9GG '9GG 9ROW 5ORDG Ÿ
x
:DWWV DW $9GG '9GG 9ROW 5ORDG Ÿ
x
:DWWV DW $9GG '9GG 9ROW 5ORDG Ÿ
x
:DWWV DW $9GG '9GG 9ROW 5ORDG Ÿ
x
Eliminate Power on and Power-off "Pop" noise
x
A Fewer External Components
x
Optimized PWM Output Stage Eliminates LC Output Filter
x
Internally generate 290 kHz Switching Frequency to eliminate Capacitor and Resistor
x
Improve PSRR (–70 dB) and Wide Supply Voltage (3.0 V to 5.5 V)
x
Fully Differential Design Reduces RF Rectification
x
This chip has been built-in a very strong ESD protection.
x
System level ESD 4KV (IEC 61000-4-2 ESD Contact Level)
x
Wafer Chip Scale Package (WCSP)
x
TSSOP Package with Exposed Pad
Ÿ7+'   $9GG '9GG 9ROW ZLWK KLJK HIILFLHQF\ ILOWHU-free
26