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PDF BD28412MUV Data sheet ( Hoja de datos )

Número de pieza BD28412MUV
Descripción 9W+9W Analog Input Class D Speaker Amplifier
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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Datasheet
Low Power Consumption Class D Amplifier
9W+9W Analog Input
Class D Speaker Amplifier
BD28412MUV
General Description
BD28412MUV is a 9W+9W stereo (or 18W monaural)
class D amplifier, developed for battery equipped
speaker systems such as wireless speakers. This IC is
incorporated with a precise oscillator to generate
multiple switching frequencies that can avoid the AM
radio interference. In addition, 2.1Ch audio system can
be realized by master and slave operation without beat
noise caused by interference between two ICs.
Furthermore, this IC achieves lower power
consumption that eliminates the need for an external
heat sink.
Features
Analog Differential Input
Low Standby Current
Output Feedback Circuitry Prevents Sound
Quality Degradation Caused by Power Supply
Voltage Fluctuation, Achieves Low Noise and Low
Distortion, Eliminates the Need of Large
Electrolytic-Capacitors for Decoupling
Power Limit Function
(Linearly-programmable)
Selectable Switching Frequency
(AM Avoidance Function)
Synchronization Control is Supported
(Selectable Master and Slave Operation)
Parallel BTL (PBTL) is Supported
Wide Voltage Range (VCC=4.5V to 13V)
High Efficiency and Low-heat-generation Make
the System Smaller, Thinner, and More
Power-saving
Pop Noise Prevention During Power Supply
ON/OFF
High Reliability Design by Built-in Protection
Circuits
- Overheat Protection
- Under Voltage Protection
- Output Short Protection
- Output DC Voltage Protection
Small Package (VQFN032V5050) Achieves Mount
Area Reduction
Key Specifications
Supply Voltage Range:
4.5V to 13V
Speaker Output Power:
9W+9W (Typ)
(VCC=12V, RL=8, PLIMIT=0V)
Speaker Output Power(PBTL):
18W (Typ)
(VCC=12V, RL=4, PLIMIT=0V)
Total Harmonic Distortion Ratio:
0.03% (Typ) @Po=1W
Crosstalk:
(VCC=11V, RL=8, PLIMIT=0V)
100dB (Typ)
PSRR:
55dB (Typ)
Output Noise Voltage:
-80dBV (Typ)
Standby Current:
0.1µA (Typ)
Operating Current:
16mA (Typ)
(No load or filter, No signal)
Operating Temperature Range: -25°C to +85°C
Package
VQFN032V5050
W(Typ) x D(Typ) x H(Max)
5.00mm x 5.00mm x 1.00mm
VQFN032V5050
Typical Application Circuit
Applications
Wireless Speakers, Small Active Speakers,
Portable Audio Equipments, etc.
Figure 1. Typical Application Circuit
Product structure : Silicon monolithic integrated circuit
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/40
TSZ02201-0C1C0E900620-1-2
21.Sep.2016 Rev.003

1 page




BD28412MUV pdf
BD28412MUV
Pin Description – continued
Power down setting pin
31 PDX I H: Active
L: Standby
Error flag pin
Please connect to pull-up resistor.
H: Normal
32 ERRORX O L: Error detected
An error flag occurs when Output Short Protection, DC
Voltage Protection, or High Temperature Protection is
activated. This flag shows IC condition during operation.
The numerical value of internal equivalent circuit is typical value, not guaranteed value.
27
31
4
4
Datasheet
55kΩ
45kΩ
500Ω
32
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
5/40
TSZ02201-0C1C0E900620-1-2
21.Sep.2016 Rev.003

5 Page





BD28412MUV arduino
BD28412MUV
Datasheet
Typical Performance Curves - continued
(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,
Gain=26dB, Output LC filter: L=15µH, C=1µF
when VCC>11V, snubber circuit is added: C=680pF, R=5.6)
100
VCC=5V
90
VCC=9V
VCC=12V
80
70 PBTL
60
RL=4
Output LC filter:
50 L=10μH, C=2.2μF
40
30
20
10
0
0 2 4 6 8 10 12 14 16 18 20 22
Output Power [W/Ch]
Figure 9. Efficiency vs Output Power
(PBTL, RL=4)
16
14 RL=6
12
10 THD+N=10%
8
6 THD+N=1%
4
2
0
4 6 8 10 12 14
SSuupppplylyVVooltltaagge : VVCCCC[[VV]]
Figure 11. Output Power vs Supply Voltage
(RL=6)
16
14 RL=8
12
10
THD+N=10%
8
6
THD+N=1%
4
2
0
4 6 8 10 12 14
SSuupppplyly VVoollttaage :: VVCCCC[V[V]]
Figure 10. Output Power vs Supply Voltage
(RL=8)
24
22
20
18
16
14
12
10
8
6
4
2
0
4
PBTL
RL=4
Output LC filter:
L=10μH, C=2.2μF
THD+N=10%
THD+N=1%
6 8 10 12
SSuuppppllyy Vooltagee ::VVCCCC[V[V] ]
14
Figure 12. Output Power vs Supply Voltage
(PBTL, RL=4)
www.rohm.com
© 2016 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
11/40
TSZ02201-0C1C0E900620-1-2
21.Sep.2016 Rev.003

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