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PDF BM28723MUV Data sheet ( Hoja de datos )
| Número de pieza | BM28723MUV | |
| Descripción | 17W+17W Full Digital Speaker Amplifier | |
| Fabricantes | ROHM Semiconductor | |
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Datasheet
Middle Power Class-D Speaker Amplifier series
17W+17W
Full Digital Speaker Amplifier
with built-in DSP
BM28723MUV
General Description
BM28723MUV is a 17W+17W Class D stereo Speaker
Amplifier with built-in DSP designed for TVs specifically
for space-saving and low-power consumption.
BM28723MUV features BCD (Bipolar, CMOS, DMOS)
process technology to achieve high efficiency. In
addition, BM28723MUV is packaged in a compact back
surface heatsink type power package to attain low
power consumption, low heat generation without
external heatsink. The package Max output power is
only 17W+17W (When RL=8Ω) as compared to
20W+20W (When RL=8Ω) Max output power of
package with external heat-sink.
The product satisfies all needs for drastic downsizing,
low-profile structures and powerful high quality
playback of sound systems.
Key Specifications
■ Supply voltage range
10V to 24V
(VCCP1,VCCP2)
■ Speaker output power
17W+17W (Typ)
(VCCP1,VCCP2=18V,
RL=8Ω)
■ THD+N
Applications
0.08 [%] (Typ)
■ TVs (LCD, OLED)
■ Home Audio
■ Desktop PC
■ Amusement equipment
■ Electronic Music equipment, etc.
Typical Application Circuit
SP ch1
(Lch)
SP ch2
(Rch)
Features
Built-in DSP (Digital Sound Processor) for Audio
Signal Processing for TVs
12-Band/ch BQ, 3-Band DRC, Pre-Scaler, Channel
Mixer, Fine Master Volume, Hard Clipper, Level
Meter, etc.
Single Input System for Digital Audio Interface
(No Master Clock Required)
- I2S / LJ / RJ Format
- LRCLK: 32 / 44.1 / 48kHz
- BCLK: 32 / 48 / 64fS
- SDATA: 16 / 20 / 24 bit
Single Output System for Digital Audio Interface
- I2S Format
- SDATA: 16 / 20 / 24 bit
No Snubber Circuit Required (VCCP1,VCCP2≤22V)
because of Slew Rate Control
Output Feedback Circuit which prevents decrease
of sound quality caused by change of power supply
voltage, achieves low noise and low distortion, So
no large electrolytic-capacitors for Vcc bypass is
required.
Wide Range of Power Supply Input Voltage
The monaural output reduces the number of
external parts needed.
High Efficiency and Low Heat Dissipation allowing
Miniaturization, Slim Design, and also Power Saving
of the System
Eliminates pop-noise generated during the power
supply ON/OFF. High quality muting performance is
achieved using the soft-muting technology.
Built-in with Various Protection Functions for Highly
Reliability Design
- High Temperature Protection
- Under Voltage Protection
- Output Short Protection
- DC Voltage Protection for speaker
- Clock Stop Protection
Small Package, It reduces surface mount area
Package
VQFN032V5050
W(Typ) x D(Typ) x H(Max)
5.00mm x 5.00mm x 1.00mm
μ -con
Digital
Audio
Source
Figure 1. Typical application circuit
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
VQFN032V5050
○This product has not designed protection against radioactive rays
1/79
TSZ02201-0C1C0E900290-1-2
01.Dec.2016 Rev.001
1 page  
BM28723MUV
I/O equivalence circuit(s) - continued
Pin
No.
Pin name
21 OUT1N
22 BSP1N
Pin
voltage
VCCP1 to
0V
－
Pin explanation
PWM output pin, CH1 negative
Connect pin to output LPF.
(Note) If this pin is shorted to GND, the IC may break.
(Note) When Reset ON or Mute ON, all output transistors are OFF
and output terminals are pulled down by 10kΩ (Typ).
Boot strap pin, CH1 negative
23 GNDP1
24 VCCP1
25 OUT1P
26 BSP1P
0V
VCCP1
VCCP1 to
0V
－
Connect a capacitor from pin to OUT1N.
Power GND pin for ch1
Power supply pin for ch1
PWM output pin, CH1 positive
Connect to output LPF.
(Note) If this pin is shorted to GND, the IC may break.
(Note) When Reset ON or Mute ON, all output transistors are OFF
and output terminals are pulled down by 10kΩ (Typ).
Boot-strap pin of ch1 positive
27 REG_G
5.7V
Connect a capacitor from pin to OUT1P.
Internal power supply pin for gate driver
Connect capacitor
(Note) The REG_G terminal of BM28723MUV should not be used
as an external supply and cannot support voltage load from
external source. Therefore, do not connect anything except
capacitor for stabilization.
29 RSTX
0V Reset pin for Digital circuit
High: Reset OFF
Low: Reset ON
30 MUTEX
Select pull-down resistor after DVDD is applied.
0V Speaker output mute control pin
High: Mute OFF
Low: Mute ON
31 SCL
Select pull-down resistor after DVDD is applied.
－ 2 wire Bus control transmit clock input pin
Input the transmit clock to this pin for 2 wire Bus
control. This pin is not corresponding to threshold
tolerance of 5V.
Refer to:
Absolute Maximum Ratings, Input voltage 1
32 SDA
－ 2 wire Bus control data input/output pin
Input the transmit data to this pin for 2 wire Bus
control. This pin is not corresponding to threshold
tolerance of 5V.
Refer to:
Absolute Maximum Ratings, Input voltage 1
The numerical value of I/O equivalence circuit is typical value, not guaranteed.
I/O equivalence circuit
24
27
22, 26
21, 25
23
24
27
23
10
29,30
8
31
350kΩ
8
32
8
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/79
TSZ02201-0C1C0E900290-1-2
01.Dec.2016 Rev.001
5 Page 
BM28723MUV
Typical Performance Curves - continued
Unless otherwise specified Ta=25°C, VCCP1,VCCP2=18V, VDVDD=3.3V, VRSTX=3.3V, VMUTEX=3.3V, f=1kHz, fs=48kHz,
DSP: Through, Driver Gain(GDRV)=26dB
Measured by ROHM designed 4 layers board(Note 11)
30
RL=6Ω
25
20
THD+N=10%
15
THD+N=1%
10
5
2.5
RL=6Ω
VCCP1,VCCP2=18V
2.0
VCCP1,VCCP2=12V
VCCP1,VCCP2=21V
1.5
1.0
0.5
0
10 12 14 16 18 20 22
VCCP1,VCCP2 [V]
Figure 12.
Output Power - Power supply voltage (RL=6Ω)
*Dotted line means exceeding maximum junction temperature.
In that case heat dissipation measures such as the heat sink are necessary
separately.
* Use this IC in 20W or less output power even with heat dissipation measures.
0.0
0
5 10 15
Output Power [W/CH]
20
Figure 13.
Current consumption - Output Power (RL=6Ω)
20
RL=4Ω
18
16 THD+N=10%
14
12
10 THD+N=1%
8
6
2.5
RL=4Ω
2.0
1.5
1.0
VCCP1,VCCP2=12V
VCCP1,VCCP2=14V
4
0.5
2
0
10 12 14 16 0.0
VCCP1,VCCP2 [V]
0 5 10 15 20
Output Power [W/CH]
Figure 14.
Figure 15.
Output Power - Power supply voltage (RL=4Ω)
*Dotted line means exceeding maximum junction temperature.
In that case heat dissipation measures such as the heat sink are necessary
separately.
* Use this IC in 15W or less output power even with heat dissipation measures.
Current consumption - Output Power (RL=4Ω)
(Note 11) 100mm×100mm×1.6mm FR4 4-layer glass epoxy board Cu Thickness 35μm/70μm/70μm/35μm For Application Evaluation Board
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/79
TSZ02201-0C1C0E900290-1-2
01.Dec.2016 Rev.001
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BM28723MUV.PDF ] | |
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