Block Diagram - Akai LCT42HA36 Service Manual

Digital Power Amplifier
10Wx2ch(SE)/20Wx1ch(BTL) Digital Audio Power Amplifier
1.Outline
R2S15102NP is a Digital Power Amplifier IC developed for TV.
R2S15102NP can realize maximum Power 10W × 2ch
(VD = 24V,THD = 10%, SE) at 8 Ω load.
It is possible to replace from the conventional analog amplifier
system to the digital amplifier system easily.
2.Feature
●High Output Power(THD=10%)without external Heat Sink
(note) the thermal pad is soldered the thermal pad with
the printed-circuit board directly.
Ｒｅｃｏｍｍａｎｄｅｄ Power Condition
SE operation mode :10Wx2ch(VD=24V) at 8 Ω
BTL operation mode: 20Wx1ch(VD=18V) at 8 Ω
●The RENESAS original circuits realize high power efficiency,
low noise and low distortion characteristics.
●Pop sound Less
●Built-in protection function
(Over Current, Over Temperature and Under Voltage)
●Built-in Mute and Stand-by function
3.Operating Condition
●Ｒｅｃｏｍｍａｎｄｅｄ Power supply voltage : from 11V to 25V
●Ｒｅｃｏｍｍａｎｄｅｄ Speaker Impedance : from 4 to 8Ω

4.Block Diagram

Ｆｉｇ．２ System Ｂｌｏｃｋ Ｄｉａｇｒａｍ
IN1
５
IN2
１１
CBIAS
６
ROSC
７
MUTEL
１３
STBYL
３
R2S15102NP
PWM1 PWM2
A
SE/BTL
Selector
A
Oscillator
Control
Logic
Under Voltage
Detection
１０
PROT
４ １２
PWM
Gene.
PWM
Gene.
Over Current
Detection
Over Temp.
Detection
８
GND
64／125
Ｆｉｇ．１ Package
２０
20pin QFN
Body : 6 x 6 mm
Lead pitch : 0.8 mm
HB1
１９
VD1
２
OUT1
１
VS1
２０
HB2
１７
VD2
１４
OUT2
１５
VS2
１６
DVDD
１８
VREF
９
１