|
|
PDF BD5446EFV Data sheet ( Hoja de datos )
| Número de pieza | BD5446EFV | |
| Descripción | Class-D Speaker Amplifier | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BD5446EFV (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
Middle Power Class-D Speaker Amplifiers
Class-D Speaker Amplifier
for Digital Input
BD5446EFV
No.10075EBT14
●Description
BD5446EFV is a Class D Speaker Amplifier designed for Flat-panel TVs in particular for space-saving and low-power
consumption, delivers an output power of 20W+20W. This IC employs state-of-the-art Bipolar, CMOS, and DMOS (BCD)
process technology that eliminates turn-on resistance in the output power stage and internal loss due to line resistances up
to an ultimate level. With this technology, the IC can achieve high efficiency of 87% (10W+10W output with 8Ω load). In
addition, the IC is packaged in a compact reverse heat radiation type power package to achieve low power consumption
and low heat generation and eliminates necessity of external heat-sink up to a total output power of 40W. This product
satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system.
●Features
1) BD5446EFV has two system of digital audio interface.
(I2S/LJ format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs (fixed), SYS_CLK: 256fs (fixed))
2) Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10~26V)
3) It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and low heat.
4) S/N of the system can be optimized by adjusting the gain setting among 8 steps. (20~34dB / 2dB step)
5) It has the output power limitation function that can be adjusted to an arbitrary output power.
6) The decrease in sound quality because of the change of the power supply voltage is prevented with the feedback
circuitry of the output. In addition, a low noise and low distortion are achieved.
7) It provides with the best stereo DAC output for the headphone usage. As a result, the output of the selection of the
digital input in two systems is possible.
8) Eliminates pop noise generated when the power supply goes on/off, or when the power supply is suddenly shut off.
High quality muting performance is realized by using the soft-muting technology.
9) BD5446EFV is a highly reliable design to which it has various protection functions.
(High temperature protection, Under voltage protection, Output short protection, Output DC voltage protection and
Clock stop protection)
●Applications
Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc.,
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
1/30
2010.05 - Rev.B
1 page  
BD5446EFV
Technical Note
www.DataSheet4U.com
●Electrical characteristic curves(VCC=18V,Ta=25℃,RL_SP=8Ω,RL_DA=20kΩ,Gain=20dB,fin=1kHz,fs=48kHz)
Measured by ROHM designed 4layer board.
100
90
80
70
60
50
40
30
20
10
0
0
5 10 15 20
OUTPUT POWER(W /ch)
Fig.13
Efficiency – Output power
40
38
36 Po=1W
34 L=22µH
32 C=0.47µF
30 Cg=0.068µF
28
26
24
22
20
10 100 1k 10k
FREQ UENCY(Hz)
Fig.14
100k
Voltage gain - Frequency
0
Without signal
-20 BW=20～20KHz
-40
-60
-80
-100
-120
-140
10
100 1k 10k
FREQUENCY(Hz)
Fig.15
100k
FFT of output noise voltage
100
BW=20～20KHz
10
1
6KHz
1KHz
0.1
100Hz
0.01
0.001 0.01 0.1 1 10 100
OUTPUT POWER(W)
Fig.16
THD+N - Output power
100
Po=1W
BW=20～20KHz
10
1
0.1
0.01
10 100 1k 10k 100k
FREQUENCY(Hz)
Fig.17
THD+N - Frequency
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
BW=20～20KHz
0.001 0.01 0.1 1 10 100
OUTPUT POWER(W)
Fig.18
Crosstalk - Output power
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
Po=1W
BW=20～20KHz
10 100 1k 10k
FREQUENCY(Hz)
100k
Fig.19
Crosstalk - Frequency
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
5/30
2010.05 - Rev.B
5 Page 
BD5446EFV
●GAIN1 pin, GAIN2 pin, GAIN3 pin function
GAIN3
(18pin)
GAIN2
(17pin)
GAIN1
(16pin)
Speaker output gain
LLL
LLH
LHL
LHH
HL L
HLH
HH L
HHH
20dB
22dB
24dB
26dB
28dB
30dB
32dB
34dB
Technical Note
www.DataSheet4U.com
●SEL_DAC pin function
SEL_DAC
(21pin)
OUT_DAC1 (23pin)
L The Lch signal of SDATA1 is output
H The Lch signal of SDATA2 is output
OUT_DAC2 (24pin)
The Rch signal of SDATA1 is output
The Rch signal of SDATA2 is output
●RESETX pin function
RESETX
(10pin)
State of Digital block
L Reset ON
H Reset OFF
●RESETX pin
RESETX
(12pin)
L
H
State of Digital block
Reset ON
Reset OFF
●PDX pin,MUTEX pin function
PDX
(12pin)
MUTEX
(11pin)
L L or H
HL
HH
Power Down
ON
OFF
DAC output
(24,25pin)
HiZ_Low
Normal operation
PWM output
(33,34,38,39,43,44,48pin)
HiZ_Low
Normal operation
●IIS_LJ pin function
IIS_LJ
(15pin)
L
H
Digital data format
I2S
Left Justified
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.
11/30
2010.05 - Rev.B
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BD5446EFV.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BD5446EFV | Class-D Speaker Amplifier | ROHM Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |