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BD3872FS PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 BD3872FS
기능 Sound Processors
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BD3872FS 데이터시트, 핀배열, 회로
Sound Processors for BOOM BOX / Mini-component Stereo
Sound Processors
with Built-in 2-band Equalizers
BD3870FS,BD3871FS,BD3872FS,BD3873FS
No.10086EAT02
Description
The Sound Pr ocessor with built-in 2 Band Equalizer, incorporates functions required for BOOM BOX and mi ni-component
systems, such as input se lector, input gai n amp, vol ume, surroun d, tone (b ass, treble), an d lo ud speaker e qualizer
(BD3872FS only). These functions can be controlled through the two-wire serial control.
Features
1) Using external components, center frequencies and Q factors of the bass characteristics are flexible.
2) Providing a mute switch onto one of the input pins allows cross-talk suppression.
3) A surround function can be constructed without external components.
4) Energy-saving design resulting in low current consumption, by utilizing the BiCMOS process
Applications
BOOM BOX, mini-audio systems, and micro-audio systems.
Line up matrix
Parameter
Input Gain
Loud Speaker Equalizer (SEQ)
BD3870FS BD38
71FS BD38
73FS
0, 6, 12, 18dB
24, 26, 28dB
18, 21, 24, 27dB
No No No
BD3872FS
0, 5, 10, 19, 21,
23, 26, 28dB
Yes
Input Selector
Volume
Equalizer
Surround
Three inputs
0 to -87dB/
1dB step, -dB
2 band
(Bass, Treble)
Yes
Three inputs
0 to -87dB/
1dB step, -dB
2 band
(Bass, Treble)
Yes
Three inputs
0 to –87dB/
1dB step, -dB
2 band
(Bass, Treble)
Yes
Five inputs
0 to -87dB/
1dB step, -dB
2 band
(Bass, Treble)
Yes
Serial Control
Two-wire serial
Two-wire serial
Two-wire serial
Two-wire serial
Package SSOP-A24
SSOP-A24 SSOP-A24
SSOP-A32
Absolute maximum ratings (Ta=25)
Prameter S
ymbol
BD3870FS
Ratings
BD3871FS BD3873FS
Power Supply Voltage
Power Dissipation
Vcc 10
Pd 800 *1
10
800 *1
10
800 *1
Operating Temperature Range Topr
-25 to +75
-25 to +75
-25 to +75
Storage Temperature Range
Tstg -55 to +125 -55 to +125 -55 to +125
*1 Reduced by 8.0 mW/at 25or higher, when installed on the standard board (Size: 70×70×1.6mm).
*2 Reduced by 9.5 mW/at 25or higher, when installed on the standard board (Size: 70×70×1.6mm).
Operating voltage range
Prameter S
Operating Voltage Range
*It must function normally at Ta=25.
ymbol
Vcc
BD3870FS
4.5 to 9.5
Ratings
BD3871FS BD3873FS
4.5 to 9.5
4.5 to 9.5
BD3872FS
10
950 *2
-25 to +75
-55 to +125
BD3872FS
4.5 to 9.5
Unit
V
mW
Unit
V
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/15
2010.10 - Rev .A http://www.Datasheet4U.com




BD3872FS pdf, 반도체, 판매, 대치품
BD3870FS,BD3871FS,BD3872FS,BD3873FS
Technical Note
3) Control Data Format List
Basic Configuration of Control Data Format
Data input direction
MSB
D9 D8 D7 D6
D5
Data
D4 D3
Control Data Format (BD3870FS, BD3871FS, BD3873FS)
Data input direction
D9 D8 D7
D6 D5
D4
(1) Input Selector
Input Gain
Surround
(2) V
olume A
(3) Bass Gain
(4) *
**
***
D3
**
Volume B
Treble Gain
*
D2 D1
LSB
D0
Select
Address
D2 D1
*
*
*
D0
0
0
1
1
0
1
0
1
Control Data Format (BD3872FS)
Data input direction
D9 D8
(1) Input Gain
D7
D6 D5 D4
Input Selector
D3
*
D2 D1
*
(2) V
olume A
Volume B
*
(3) Bass Gain
Treble Gain
(4) * * * * * * Surround SEQ
0
0
1
1
D0
0
1
0
1
”*” indicates 0 or 1.
By ch anging the settin g of Select Ad dress, three or four dif ferent control forma ts (BD3871F S, BD387 2FS,
BD3873FS, plus BD3872FS) are selectable.
In every power-on sequence, all of the address data must be initialized.
Example:
Input direction
MSB
LSB MSB
LSB MSB
LSB MSB
LSB
Data(1) L
Data(2) L Data(3) L
“L” indicates a latch.
Data(4)
L
After power-on, for the second and subsequent times, only the necessary data can be selected for setting.
Example: When changing the volume,
Input direction
MSB
LSB
Data(2) L
“L” indicates a latch.
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
4/15
2010.10 - Rev .A

4페이지










BD3872FS 전자부품, 판매, 대치품
BD3870FS,BD3871FS,BD3872FS,BD3873FS
Technical Note
0.33μ 0.01μ 0.33μ 0.01μ 0.0022μ 0.0022μ
0.1μ
5.6K
0.1μ
390K
32 31 30 29 28 27 26 25
OUT1 OUT2
Vcc DATA CLOCK
LATCH
5.6K
0.1μ 0.1μ
4.7μ 4.7μ 0.33μ
++
390K
24 23 22 21 20 19 18 17
Loud speaker
equa liz er1
Loud speaker
equal ize r2
Tre bl e 1
f c=10 kHz
Tr eb le
fc= 10 kHz
Bass1
f0 =8 0Hz
Bass2
f0=80Hz
L ogic
Vcc/2
Vcc/2
Vcc/2
0dB
-87dB
-
0dB
-87dB
-
Vcc/2
12
Vcc/2
34
0.22μ
0.22μ
100k 1
56
00k 100k 100k
100k
100k 100k
100k 100k
100k
7 8 9 10 11 12 13 14 15
16
+
0.1μ 0.1μ 0.1μ 0.1μ 0.1μ 0.1μ 0.1μ 0.1μ 0.1μ 0.1μ
4.7k 4.7k 10μ
A1 A2 B1 B2 C1 C2 D1 D2 E1 E2
Unit: Resistance =, Capacitor = F
Fig.4 Application to Loud Speaker Equalizer
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
7/15
2010.10 - Rev .A

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