Sanyo LCD-32XR10F, Service Manual

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performance
 Miscellaneous 
·  Embedded 8-bit MCU
·  Clock generation from a single 24MHz crystal
·  Supports I2C interface with bypass mode
·  Operating voltage: 3.3V and 1.2V
·  48-pin LQFP package
3
、
Audio power amplifier
RENESAS R2A15112
R2A15112FP is a Digital Power Amplifier IC developed for TV.
R2A15112FP has a maximum power of 15W(typ) × 2ch.
(VD = 24V,THD = 1%, SE) at a 4 Ω load.
It is possible to replace a conventional analog amplifier
with a digital amplifier easily.
●
Maximum power out put (No external heat sink)
(note) These apply when the thermal pad is soldered to
the printed-circuit board directly.
Recommended Power Condition
SE operation mode :15Wx2ch(VD=24V,4 Ω load,THD+N:1%
）
BTL operation mode:30Wx1ch(VD=21V,8 Ω load,THD+N:10%
）
●
Highly efficient, low noise, and low distortion
●
Popless
●
Built-in protection - Overcurrent, overheat, and undervoltage
●
Built-in Mute and Standby function
●
The gain can be changed to four settings by two terminals.
●
Power supply voltage : 11V to 25V
●
Speaker Impedance : from 4 to 8 Ω
Under Voltage
Detection
Over Temp.
Detection
Over Current
Detection
Control
Logic
STBYL
GND
IN1
A
MUTEL
PROT
CBIAS
A
IN2
PWM
Gen.
PWM
Gen.
Oscillator
ROSC
GAIN1 GAIN2
SE/BTL