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PDF BD5451EFV Data sheet ( Hoja de datos )
| Número de pieza | BD5451EFV | |
| Descripción | Class-D Speaker Amplifier | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Middle Power Class-D Speaker Amplifiers
Class-D Speaker Amplifier
for Digital Input
BD5451EFV
No.11075EAT17
●Description
BD5451EFV 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 15W+15W. 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 90% (15W+15W 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 toｓ a total output power of 30W. This product
satisfies both needs for drastic downsizing, low-profile structures and many function, high quality playback of sound system.
●Features
1) This IC has one system of digital audio interface.
(I2S format, SDATA: 16 / 20 / 24bit, LRCLK: 32kHz / 44.1kHz / 48kHz, BCLK: 64fs(fixed), MCLK: 256fs(fixed))
2) Low supply current at RESET mode.
3) 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.
Eliminate large electrolytic-capacitors for high performance of Power Supply Rejection.
4) S/N of the system can be optimized by adjusting the gain setting among 2 steps. (20dB / 26dB)
5) Available for Monaural mode.
6) Within the wide range of the power supply voltage, it is possible to operate in a single power supply. (10～18V)
7) It contributes to miniaturizing, making to the thin type, and the power saving of the system by high efficiency and
low heat.
8) Eliminates pop noise generated when the power supply goeswww.DataSheet.co.kr on/off, or when the power supply is suddenly shut off.
High quality muting performance is realized by using the soft-muting technology.
9) This IC 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, (MCLK, BCLK, LRCLK))
10) Small package (HTSSOP-B28 package) contributes to reduction of PCB area.
●Applications
Flat Panel TVs (LCD, Plasma), Home Audio, Desktop PC, Amusement equipments, Electronic Music equipments, etc.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
1/34
2011.06 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
BD5451EFV
Technical Note
●Electrical characteristics (VCC=12V, Gain=26dB, fin=1kHz, fs=48kHz)
Measured by ROHM designed 4 layer board.
25
RL=8Ω
20
15
10
5
0
8
10
THD+N=10%
THD+N=1%
12 14 16 18 20
VCC [V]
3
2.5 VCC=15V
RL=8Ω
2 VCC=12V
VCC=18V
1.5
1
0.5
0
0 10 20 30 40 50
TOTAL OUTPUT POWER [W]
60
Fig.7
Output power – Power supply voltage
Fig.8
Current consumption - Output power
30
RL=6Ω
25
20
15
10
5
0
8
10
THD+N=10%
THD+N=1%
12 14 16 18 20
VCC [V]
Fig.9
Output power – Power supply voltage
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4
RL=6Ω
3.5
3
2.5
2
1.5
1
0.5
0
0 10
VCC=12V
VCC=15V
VCC=18V
20 30 40 50 60
TOTAL OUTPUT POWER [W]
Fig.10
Current consumption - Output power
40
35 RL=4Ω
30
25
20
15
10
5
0
8
10
THD+N=10%
THD+N=1%
12 14 16 18 20
VCC [V]
Fig.11
Output power – Power supply voltage
5
4.5
VCC=15V
4
3.5
VCC=12V
VCC=18V
3
2.5
2
1.5
1
0.5
0
0 10 20 30 40 50 60
TOTAL OUTPUT POWER [W]
Fig.12
Current consumption - Output power
※Dotted line means internal dissipation is over package power.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
5/34
2011.06 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
BD5451EFV
Pin No. Pin name Pin voltage
Pin explanation
12 FILA
2.5V
Bias pin for PWM signal.
Please connect the capacitor.
14 VCCA
Vcc Power supply pin for Analog signal
15,16
VCCP2
17,18
OUT2P
19 GNDP2
20,21
OUT2N
22,23
OUT1N
24 GNDP1
25,26
OUT1P
27,28
VCCP1
Vcc
Vcc～0V
0V
Vcc～0V
Vcc～0V
Power supply pin for ch2 PWM signal
Please connect the capacitor.
Output pin of ch2 positive PWM
Please connect to Output LPF.
GND pin for ch2 PWM signal
Output pin of ch2 negative PWM
Please connect to Output LPF.
Output pin of ch1 negative PWM
Please connect to Output LPF.
0V
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GND pin for ch1 PWM signal
Vcc～0V
－
Output pin of ch1 posotive PWM
Please connect to Output LPF.
Power supply pin for ch1 PWM signal
Please connect the capacitor.
Technical Note
Internal equivalence circuit
14
50K
12
50K
7
－
15,16
17,18
20,21
19
27,28
25,26
22,23
24
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
11/34
2011.06 - Rev.A
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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