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PDF CXA3785R Data sheet ( Hoja de datos )
| Número de pieza | CXA3785R | |
| Descripción | Audio Driver | |
| Fabricantes | Sony | |
| Logotipo |  |
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Audio Driver for TV
CXA3785R
Description
The CXA3785R is an integrated audio sub-system designed for TV audio application. It has a stereo
headphone amplifier, and 4 stereo amplifiers. It also integrated gain control, mute control, input selector, and
voltage detectors. Each settable value is controlled through I2C compatible interface.
Features
4 stereo audio amplifiers (HP, AMP1, AMP2, AMP3) with programmable gain control
Cap less headphone amplifier
2 amplifiers (HP and AMP1) with 3rd order LPF for PWM input
AMP3 with 2 stereo input multiplexer and LL/RR output
AMP4 for Digital Media Port (DMP) with differential input
4 voltage detection circuits for VUNREG (un-regulated power supply voltage), REGAUD (audio amp power
supply voltage), REG33 (DSP power supply voltage) and speaker output
3 muting circuits with external mute control and buffer transistor
REGAUD output for supply voltage of 4 stereo audio amplifiers and DMP
REG33 output for supply voltage of DSP and PWM output stage
I2C control
Package size: 64pin LQFP (Body size: 10mm × 10mm)
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license
by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating
the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
-1-
E08906
1 page  
CXA3785R
Pin No.
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Pin name
AMP4OUTL
GND_AMP4
AMP4OUTR
AMP4INR_N
AMP4INR_P
X_PROTECTOUT
VFAULT
MT_CNT
MTSEL_CNT
DVDD
DGND
SCL
SDA
REG33
REG33NFB
GND_REF
REGAUD
VUNREG_REF
AMP1_MT
AMP2_MT
AMP3_MT
VUNREG_MT
GND_MT
SPLN
SPLP
SPRN
SPRP
Direction
O
—
O
I
I
O
I
I
I
—
—
I
I/O
O
O
—
O
—
O
O
O
—
—
I
I
I
I
Description
AMP4 Lch output
AMP4 GND
AMP4 Rch output
AMP4 Rch negative input
AMP4 Rch positive input
Protect signal output
Fault signal input
All amp mute control signal input
Selected amp mute control signal input
Logic power
Logic GND
I2C clock
I2C data
REG33 external FET control signal output
REG33 negative feedback output
Reg/reference GND
Regulator output for audio amp
Un-regulated power for reg/reference
AMP1 mute control signal output
AMP2 mute control signal output
AMP3 mute control signal output
Un-regulated power for mute circuit
Mute circuit GND
Speaker Lch negative input
Speaker Lch positive input
Speaker Rch negative input
Speaker Rch positive input
-5-
5 Page 
Pin Symbol
54 REGAUD
56 AMP1_MT
57 AMP2_MT
58 AMP3_MT
61 SPLN
62 SPLP
63 SPRN
64 SPRP
Equivalent circuit
VUNREG_REF VUNREG_REF
VUNREG_REF
10pF 40kΩ
54
56kΩ
GND_REF
GND_REF
GND_REF
VUNREG_MT
60kΩ
VUNREG_MT
120kΩ
GND_MT
56
57
58
VUNREG_MT
REGAUD
61
62
63 150kΩ
64
GND_MT
CXA3785R
- 11 -
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet CXA3785R.PDF ] | |
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