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ROHM Semiconductor |
Sound Processor Series for Car Audio
6ch Electronic Volume
for 5.1ch Car Theater
BD3433K
No.10085EAT01
●Description
The 6ch electronic volume for 5.1ch car theater is an electronic volume device incorporating 6ch input selector (front/rear
independently-controlled), input gain amp (front/rear independently-controlled), 6ch independently-controlled electronic
volume (capable of soft switching), 6ch output gain amp (2-line outputs), differential input for monophonic signals, electronic
volume for monophonic signals (capable of soft switching), and mixing circuit for monophonic signals. It is provided with
the high performance functions to achieve low distortion and low noise and, furthermore, to output the 5.6Vrms high voltage.
The QFP44 package which realizes savings in space and components is used to be suited for applications such as car
audio and car navigation.
●Features
1) High voltage output of 5.6Vrms achieved
Provided with 2 lines of outputs to the built-in power amp and the pre-out
2) Volume switching noise is reduced by installing the advanced 6ch independently-controlled electronic volume
with soft switching.
3) High performance capabilities such as low distortion rate (0.001%), low noise (3µVrms)
4) Different signals from the different sources can be outputted to the front and rear sections
independently and this provides an option of rear-seat entertainment.
5) Incorporate the monophonic differential input circuit suited for inputting navigation voice and telephone speech.
These monophonic voices can be mixed with the front output signals.
6) Adopting the Bi-CMOS process achieves low current consumption, which contributes to energy-saving design.
It has the advantage in quality over scaling down and heat reduction of the internal regulators.
7) 3-wire serial interface supported for both of 3.3V and 5V microcomputers
●Applications
For car audio equipment, car navigation equipment, and hybrid systems.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/8
2010.03 - Rev.A
BD3433K
Technical Note
●Absolute maximum ratings(Ta=25C)
Item Symbol
Terminal
Rating
VCC-GND ※1
10
Terminal applied voltage VEE-GND ※1
VLGC Control terminal (CS/SCK/SDA)※1
-10
5.5
Power dissipation
Pd ※2
850
Operating Temperature
Topr
-40 ~ +85
Storage Temperature
Tastg
-55 ~ +125
※1:Maximum applied voltage based on GND.
※2:Derating is done 8.5mW/℃ for Ta>25℃.
Mounted on (Material: FR4 glass epoxy board (beaten-copper area <3%), size:70mm×70mm×1.6mm)
※3:No radiation-proof design
Unit
V
mW
℃
℃
●Operating conditions(Operating condition at Ta=25℃)
Item
Symbol Terminal Condition MIN
TYP MAX Unit
Operating power supply voltage
VCC
VEE
VCC-GND
VEE-GND
※1
7.0 9 9.5 V
-9.5 -9 -7.0 V
※1: When it is within operating temperature, basic circuit function is guaranteed within operating voltage. However, setting
constant and element, voltage setting, and temperature setting are required when in operation. Other than the condition
stipulated within the range, the standard value of electrical characteristics could not be guaranteed, while original function is
retained.
●Electrical characteristics
Abbreviations:
“Giaj”:Setting value of Input gain adjustor
“Vol”:Setting value of volume (1~6ch)
“Vol.Ex”:Setting value of volume for monaural signal
“Goaja”:Setting value of output gain adjustor A
“Goajb”:Setting value of output gain adjustor B
“Mix”:ON/OFF setting for mixing switch.
Measurement condition (Unless specified particularly) :
Ta=25℃, VCC=9V, VEE=-9V, Vin=1Vrms/1kHz, Load resistance=10kΩ, Load capacitance=10pF,
Giaj=0dB, Vol=0dB, Goaja=0dB, Goajb=0dB, Vol.Ex=-∞dB, Mix=OFF
■ General characteristics
Item
Current consumption
VCO oscillation frequency
Ripple rejection
Reset operation voltage
Required time
for Power on reset
Symbol
Condition
MIN TYP MAX
ICC - 10 17
IEE
-17 -9
-
Fvco
- 400
-
RRc
Ripple = 0.1Vrms/ 1kHz
(Input terminal AC short)
40 85
-
RRe
Ripple= 0.1Vrms/ 1kHz
(Input terminal AC short)
30 70
-
VRS
Initialize all register data by
Vcc<VRS → Vcc>VRS
- 3.4
-
TPOR
Minimum required time to reach
3V after Vcc voltage ON.
20
-
-
Unit
mA
kHz
dB
dB
V
µsec
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
2/8
2010.03 - Rev.A
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