ROHM BD5471MUV

High Performance Class-D Speaker / Headphone Amplifier Series
2.3W+2.3W
Class-D Speaker Amplifier
for Differential Analog input
No.09075EAT10
BD5471MUV
●Description
BD5471MUV is a low voltage drive class-D stereo speaker amplifier that was developed for note-book PC, cellular phone,
mobile audio products and the others.
LC filters of speaker outputs are unnecessary, and only 7 external components are needed for speaker system.
Also, 3.3V regulator in BD5471MUV can use power supply for audio-codec.
BD5471MUV, that is high-efficiency, low consumption, is suitable for application by using battery.
Shutdown current is 0µA typically. Also, start-up time is fast from shutdown to active mode.
BD5471MUV can use for some applications that change mode between “shutdown state” and “active state”.
●Features
1) High power 2.3W typ. (VDD=5V, RL=4Ω, THD+N=10%, stereo input)
High power 1.5W typ. (VDD=5V, RL=8Ω, THD+N=10%, stereo input)
2) Gain selectable by the external control (6, 12, 18, 24dB)
3) Pop noise suppression circuitry
4) Standby function (Mute function) [ISD=0uA]
5) Protection circuitry (Short protection [Audio, REG], Thermal shutdown, Under voltage lockout)
6) Built-in 3.3V regulator
7) Built-in BEEP detect circuitry
8) Very small package VQFN024V4040
●Applications
Notebook computers，Mobile electronic applications，Mobile phones，PDA etc.
●Absolute Maximum Ratings（Ta=+25℃）
Item
Power Supply Voltage
Power Dissipation
Pd
Storage Temperature Range
Input Voltage Range *3
Tstg
Vin
Rating
7.0
0.7 *1
2.2 *2
-55 ～ +150
-0.3～VDD+0.3
Vctl
-0.3～VDD+0.3
Control Terminal
Input Voltage Range *4
*1
Symbol
VDD
Unit
V
W
W
℃
V
V
74.2mm×74.2mm×1.6mm, FR4 1-layer glass epoxy board(Copper on top layer 0%)
Derating in done at 5.6mW/℃ for operating above Ta=25℃. There are thermal via on the board
*2
74.2mm×74.2mm×1.6mm, FR4 4-layer glass epoxy board (Copper on bottom 2 and 3 layer 100%)
*3
input Terminal (INL+, INL-, INR+, INR-)
*4
Control Terminal (MUTE, G0, G1, EAPD, BEEP, REG_SD)
●Operating Conditions
Item
Power Supply Voltage
Temperature Range
Symbol
VDD
Topr
Range
+4.5 ～ +5.5
-40 ～ +85
Unit
V
℃
* These products aren’t designed for protection against radioactive rays.
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© 2009 ROHM Co., Ltd. All rights reserved.
1/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Electric Characteristics（Unless otherwise specified, Ta＝+25℃, VDD=+5.0V, RL=8Ω, AC item= LC Filter(L=22µH, C=1µF) )
Item
Symbol
MIN.
Limit
TYP.
MAX.
Unit
Circuit current (Active)
ICC
―
5.5
12.0
mA
Circuit current (Standby)
ISTBY
―
0.1
1.0
mA
Circuit current (Regulator)
ICCR
―
0.15
1.0
mA
Circuit current (Shutdown)
<Speaker Amplifier>
ISD
―
0.1
2.0
µA
Output power 1
PO1
0.8
1.2
―
W
Output power 2
PO2
1.0
1.5
―
W
5.5
11.5
17.5
23.5
―
60
70
175
0.78
63
42
25
14
6.0
12
18
24
0.2
70
90
250
1.02
90
60
36
20
6.5
12.5
18.5
24.5
1.0
―
―
325
1.46
117
78
47
26
dB
dB
dB
dB
%
dB
dB
kHz
msec
kΩ
kΩ
kΩ
kΩ
3.30
200
0.2
3.45
―
1
V
mA
mV/mA
―
―
33
VDD
0.4
44
V
V
µA
Voltage gain
GV
Total harmonic distortion
Crosstalk
S/N
Switching Frequency
Start-up time
THD+N
CT
SNR
fosc
Ton
Input resistance
RIN
<Regulator>
Output voltage
Vo
3.15
Maximum output current
Iom
150
Load regulation
LREG
―
<Control terminal (MUTE, G0, G1, EAPD, BEEP, REG_SD) >
High-level
VCTLH
1.4
Control terminal
input voltage
Low-level
VCTLL
0
Control terminal input current
ICTL
22
Conditions
Active mode,
MUTE=H, EAPD=H, No load
Standby mode, MUTE=H,EAPD=L
Regulator Mode, MUTE=EAPD=L
REG_SD=H
Shutdown mode, MUTE=L, REG_SD=L
BTL, f=1kHz, THD+N=1%,
Stereo input, *1, *2
BTL, f=1kHz, THD+N=10%,
Stereo input, *1, *2
BTL, G0=G1=GND
BTL, G0=GND, G1=VDD
BTL, G0=VDD, G1=GND
BTL, G0=G1=VDD
BTL, Po=0.7*PO1 *1, *2
BTL, f=1kHz *1, *3
BTL, Po=PO1 *1, *3
G0=G1=GND
G0=GND, G1=VDD
G0=VDD, G1=GND
G0=G1=VDD
Io=150mA
Vo=3.15V
Io=0→150mA
Control terminal Input voltage VCTL=5V
*1: B.W.＝400～30kHz， BTL：The voltage between 3pin and 6pin, 13pin and 16pin
●Active / Standby Control
Mode
Pin level
MUTE
EAPD
BEEP
H/L
H/L
H/L
IC active/ shutdown
IC active/standby
IC active/standby
REG_SD
H/L
REG active/shutdown
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© 2009 ROHM Co., Ltd. All rights reserved.
Conditions
2/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Measurement Circuit Diagram
Vin
Vin
Vin
C8
0.1μF
INL+
C7
0.1μF
23
24
C5
0.1μF
INR－
C6
AGND
INL-
22
Vin
VDD
10uF
AVDD
C9
+B
20
21
C4
0.1μF
INR＋
19
BEEP
VBEEP
1
A
VG0
G0
G0
150k
150k
BEEP
DET
DET_C
18
A
VG1
G1
2
Gain
Select
C1
0.01uF
G0
G1
G1
Gain
Select
G0
G1
150k
17
A
BEEP
22μF
OUTL+
OUTR+
VSE V
SHORT
1μF
VDD
SHORT
SHORT
UVLO TSD SHORT
HBridge
PWM
HBridge
PWM
STOP
PVDDL
V
BEEP
MUTE
EAPD
C11
8Ω
1μF
V VSE
PVDDR
15
4
VBTL
22μF
16
3
PGNDL
OSC
BIAS
UVLO
UVLO
TSD
TSD
8Ω
V
VBTL
PGNDR
14
5
SHORT
22μF
OUTL-
SHORT
SHORT
VSE
V
1μF
OUTR-
22μF
13
6
MUTE
150k
7
MUTE
A
EAPD
8
EAPD
A
VMUTE
9
REG_SD
10
REG_VDD
11
REG_OUT
C3
12
REG_GND
2.2μF
A
VEAPD
1μF
3.3VREG
150k
C2
VREG_SD
VDD
●Package Outlines
TOP VIEW
BOTTOM VIEW
D5471
(unit : mm)
VQFN024V4040 (Plastic Mold)
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© 2009 ROHM Co., Ltd. All rights reserved.
3/21
2009.07 - Rev.A
V VSE
Technical Note
BD5471MUV
●Block Diagram
●Pin Assignment <top view>
Gain
Select
PWM
HBridge
INL23
OUTL+
3
6
OUTL-
24
23
22
21
20
19
INR+
INL+
24
INR-
AVDD
21
AVDD
PVDDR
15
AGND
10
INL-
REG_VDD
4
INL+
PVDDL
ERROR
G0
G1
1
BEEP
G0
18
OUTR+
16
2
DET_C
G1
17
13
3
OUTL+
OUTR+
16
4
PVDDL
PVDDR
15
5
PGNDL
PGNDR
14
6
OUTL-
OUTR-
13
Short
Protection
INR+
19
Gain
Select
PWM
INR20
HBridge
OUTRERROR
G0
G0
18
G1
G0
Short
150k
G1
17
G1
REG SD
REG VDD
REG OUT
REG GND
Bias
EAPD
150k
DET_C
2
ERROR
UVLO
150k
EAPD
8
BEEP
1
Control
Logic
MUTE
MUTE
7
TSD
7
8
9
10
11
12
OSC
150k
BEEP
Detect
150k
Short
Protection
REG_SD
9
REG
REG_OUT
3.3V
11
150k
12
REG_GND
●Pin Assignment Table
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
5
PGNDL
14
PGNDR
22
AGND
PIN 名
BEEP
DET_C
OUTL+
PVDDL
PGNDL
OUTLMUTE
EAPD
REG_SD
REG_VDD
REG_OUT
REG_GND
OUTRPGNDR
PVDDR
OUTR+
G1
G0
INR+
INRAVDD
AGND
INLINL+
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© 2009 ROHM Co., Ltd. All rights reserved.
4/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Application Circuit Example
C5
10μF
PVDDL
Audio
InputL+
Audio
InputL-
10
AVDD
21
INL+
24
Gain
Select
C2
Differential
Input
PVDDR
15
REG_VDD
4
0.1μF
0.1μF
HBridge
PWM
INL23
G0
0.1μF
Audio
InputR-
G1
Short
Protection
Short
INR+
19
Gain
Select
C4
Differential
Input
HBridge
PWM
INR20
0.1μF
OUTR+
16
13
OUTR-
ERROR
C3
G0
G0
18
G0
Gain
Control
6
OUTL-
ERROR
C1
Audio
InputR+
OUTL+
3
G1
G0
Short
150k
G1
G1
17
MUTE
MUTE
7
EAPD
EAPD
8
Control
Logic
TSD
G1
ERROR
UVLO
150k
150k
BEEP
1
BEEP
DET_C
2
0.01μF
H：Active
Bias
OSC
150k
BEEP
Detect
150k
C8
Short
Protection
REG_SD
9
REG_SD
L：Shutdown
REG_OUT
3.3V
REG
11
150k
C7
14
5
12
PGNDL
REG_GND
2.2μF
22
PGNDR
AGND
Differential input
C5
10μF
PVDDL
Audio
Input L
Single-Ended
Input
REG_VDD
4
0.1μF
AVDD
21
PVDDR
15
10
INL+
24
Gain
Select
C2
HBridge
PWM
INL23
C1
Audio
Input R
Single-Ended
Input
G0
G1
Short
Protection
Short
INR+
19
C4
Gain
Select
HBridge
PWM
INR20
C3
Gain
Control
OUTR+
16
13
OUTR-
ERROR
0.1μF
G0
G0
18
G0
6
OUTL-
ERROR
0.1μF
0.1μF
OUTL+
3
G1
G0
Short
G1
UVLO
150k
G1
G1
17
MUTE
MUTE
7
EAPD
EAPD
8
TSD
Control
Logic
ERROR
150k
150k
BEEP
1
BEEP
DET_C
2
0.01μF
H：Active
REG_SD
L：Shutdown
Bias
OSC
150k
BEEP
Detect
150k
C8
Short
Protection
REG_SD
9
REG_OUT
3.3V
REG
11
150k
C7
12
REG_GND
5
PGNDL
14
PGNDR
2.2μF
22
AGND
Single-Ended input
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© 2009 ROHM Co., Ltd. All rights reserved.
5/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Evaluation board Circuit Diagram
Audio Input
Audio Input
C5
C7
C6
C4
C3
C8
24
INL+
23
22
INL-
21
AGND
AVDD
20
19
INR-
INR+
BEEP
JP1
1
G0
G0
150k
150k
BEEP
DET
DET_C
C1
18
G1
2
Gain
Select
G0
G1
G1
Gain
Select
G0
G1
150k
17
JP4
JP5
BEEP
OUTL+
OUTR+
16
3
SHORT
SHORT
UVLO TSD SHORT
HBridge
SHORT
PWM
STOP
HBridge
PWM
PVDDL
PVDDR
15
4
to Speaker
(BTL)
BEEP
MUTE
EAPD
PGNDL
OSC
BIAS
UVLO
UVLO
TSD
TSD
to Speaker
(BTL)
PGNDR
14
5
SHORT
OUTL-
SHORT
SHORT
OUTR-
13
6
EAPD
MUTE
150k
7
3.3VREG
150k
MUTE
8
EAPD
9
REG_SD
10 REG_VDD
11
REG_OUT
12
REG_GND
C2
3.3V
Regulator
JP2
JP3
JP4
Please connect to Input
Signal line.
Please connect to Power Supply
(VDD=+2.5～5.5V) line.
Please connect to Speaker.
Please connect to GND line.
●Evaluation board Parts List
Manufacturer/
Part Number
Murata
GRM188R71C103KA01D
Murata
GRM188R61C225KE15D
Murata
GRM188R71C104KA01D
ROHM
TCFGA1A106M8R
Qty.
Item
Description
SMD Size
1
C1
Capacitor, 0.01μF
1608
1
C2
Capacitor, 2.2μF
1608
2
C3, C4,C6,C7
Capacitor, 0.1μF
1608
1
C5, C8
Capacitor, 10μF
A (3216)
1
U1
IC, BD5471MUV,
Stereo Class-D audio
amplifier
4.0mm X 4.0mm
VQFN Package
ROHM
BD5471MUV
1
PCB1
Printed-circuit board,
BD5471MUV EVM
―
―
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© 2009 ROHM Co., Ltd. All rights reserved.
6/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●The relation in the gain setting and input impedance Ri
The gain setting terminal (G0,G1)
G0
G1
Gain[dB]
Ri [Ohm]
L
L
6
90k
L
H
12
60k
H
L
18
36k
H
H
24
20k
●Description of External parts
① Power down timing capacitor (C1)
It’s the capacitor which adjusts time from BEEP signal stop to amplifier stop.
Turn off time Toff is set the following fomula.
Toff 
C1  0.8VDD
[ms]
5u
② Regulator output capacitor(C2)
Output capacitor of 3.3V regulator.
Use capacitance equal to or more than 1uF.
③ Input coupling capacitor Ci (C3,C4, C6,C7)
It makes an Input coupling capacitor 0.1uF.
Input impedance Ri in each gain setting becomes the above table.
In 18dB gain setting, it is Ri=36kΩ(Typ.).
It sets cutoff frequency fc by the following formula by input coupling capacitor Ci (C3,C4, C6,C7) and input impedance Ri
fc 
1
[Hz]
2π Ri  Ci
In case of Ri=36kΩ, Ci=0.1uF, it becomes fc=about 44Hz.
④ The power decoupling capacitor (C5,C8)
It makes a power decoupling capacitor 10uF.
When making capacitance of the power decoupling capacitor small, there is an influence in the Audio characteristic.
When making small, careful for the Audio characteristic at the actual application.
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© 2009 ROHM Co., Ltd. All rights reserved.
7/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Evaluation board PCB layer
Top Layer
Bottom Layer
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© 2009 ROHM Co., Ltd. All rights reserved.
8/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●The way of evaluating Audio characteristics
Evaluation Circuit Diagram
C5
10μF
PVDDL
Audio
InputL+
Audio
InpuLt-
10
Gain
Select
0.1μF
PWM
ERROR
0.1μF
Audio
InputR-
PWM
G0
Gain
Control
Audio
1μF
13
22μF
OUTR-
Precision
1μF
etc.
RL=Speaker Load
G0
Short
G1
UVLO
150k
G1
etc.
RL BTL
G1
TSD
G1
17
Precision
Measurement Instrument
HBridge
ERROR
C3
G0
6
22μF
OUTL-
OUTR+ 22μF
16
INR20
G0
18
RL BTL
Short
Protection
Short
Gain
Select
0.1μF
Audio
1μF
1μF
RL=Speaker Load
G1
INR+
19
C4
Differential
Input
HBridge
INL23
G0
Measurement Instrument
OUTL+ 22μF
3
C1
Audio
InputR+
AVDD
21
INL+
24
C2
Differential
Input
PVDDR
15
REG_VDD
4
0.1μF
Control
Logic
ERROR
150k
MUTE
MUTE
7
EAPD
EAPD
8
150k
BEEP
1
BEEP
DET_C
2
0.01μF
H：Active
REG_SD
Bias
OSC
150k
BEEP
Detect
150k
C8
Short
Protection
REG_SD
9
L：Shutdown
REG_OUT
3.3V
REG
11
150k
C7
5
12
REG_GND
PGNDL
14
PGNDR
2.2μF
22
AGND
When measuring Audio characteristics, insert LC filter during the output terminal of IC and the speaker load and
measure it.
it. Arrange LC filter as close as possible to the output terminal of IC.
In case of L=22μH, C=1μF, the cutoff frequency becomes the following.
fc 
1
2π LC
[Hz]
=33.9[kHz]
Use a big current type - Inductor L.
（Reference）
TDK ： SLF12575T-220M4R0
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© 2009 ROHM Co., Ltd. All rights reserved.
9/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●BEEP Detection Function
This IC has BEEP detection.
When inputting beep signal to 1pin BEEP terminal at standby mode, amplifier becomes standby to active.
When beep signal stops, amplifier becomes active to standby.
It is adjustable the time(Toff) from beep signal stop to amplifier standby by a capacitance connect to 2pin DET_C terminal.
If no need to use BEEP detection, make 1pin BEEP terminal open or connect to GND.
MUTE
BEEP
VDD
0.2×VDD
DET_C
Active
Active
Amplifier
state
Standby
Toff
Toff calculation fomula
Toff=
C×0.8VDD
5u
[msec]
Example C=0.01u, VDD=5V → Toff=8msec
C：Condenser to connect to a 2pin
MUTE=H, BEEP signal input
MUTE=H, BEEP signal stop
DET_C
2V/div
OUTL+
5V/div
BEEP 5V/div
Toff
Ton
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© 2009 ROHM Co., Ltd. All rights reserved.
10/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Cntrol Terminal and output
Audio Signal
Beep Signal
Audio Signal
Beep Signal
Audio Signal
Audio IN
[ Input ]
In case of EAPD=L,
it doesn’t output.
EAPD
[ Input ]
Beep Signal
f=300～1760Hz
Equal to or more than
0.125sec.
BEEP
[ Input ]
It detects that
BEEP was inputted.
3.3msec
570usec
It makes an amplifier state to
standby mode if BEEP isn’t
inputted equal to or more than 3.3msec.
MUTE
[ Input ]
Active
Active
Amplifier state
Standby
Standby
Standby
Shutdown
Amplifier is a standby.
The current comsumption
The current consumption reduces.
in the audio part is zero.
Speaker output
Input
Output
MUTE
EAPD
BEEP
Audio IN
Amplifier state
Speaker output
L
L
L
L
L
L
L
L
L
L
H
H
No signal
signal
No signal
signal
L(Shutdown)
L(Shutdown)
L(Shutdown)
L(Shutdown)
Hiz
Hiz
Hiz
Hiz
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
No signal
signal
No signal
signal
No signal
signal
No signal
signal
No signal
signal
No signal
signal
L(Shutdown)
L(Shutdown)
L(Shutdown)
L(Shutdown)
L(Standby)
L(Standby)
H(Active)
H(Active)
H(Active)
H(Active)
H(Active)
H(Active)
Hiz
Hiz
Hiz
Hiz
Hiz
Hiz
No signal
signal
No signal
signal
No signal
signal
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© 2009 ROHM Co., Ltd. All rights reserved.
11/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●About output starting and stop
This IC has the cuircuit of pop noise reduction at starting and stop.
Pop noise reduction is realized in controlling to adjust the timing of output at starting and stop.
Turn on time is 1msec.
Output starting (MUTE=H, EAPD=L→H)
Output stop (MUTE=H, EAPD=H→L)
EAPD
5V/div
OUTL+
5V/div
OUTL5V/div
Ton=1msec
●About the short protection
OUTL+
H－
Bridge
OUTL－
When detecting a short of Lch output,
Lch output stops, and Rch output stops.
Also when detecting a short of Rch output,
Rch output stops, and Lch output stops.
Short
Protection
Short
Protection
H－
Bridge
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© 2009 ROHM Co., Ltd. All rights reserved.
OUTR+
OUTR－
12/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●About the thermal design by the IC
Characteristics of an IC have a great deal to do with the temperature at which it is used, and exceeding absolute maximum
ratings may degrade and destroy elements. Careful consideration must be given to the heat of the IC from the two
standpoints of immediate damage and long-term reliability of operation. Pay attention to points such as the following.
Since an maximum junction temperature (TjMAX.)or operating temperature range (Topr) is shown in the absolute maximum
ratings of the IC, to reference the value, find it using the Pd-Ta characteristic (temperature derating curve).
If an input signal is too great when there is insufficient radiation, TSD (thermal shutdown) may operate.
TSD, which operates at a chip temperature of approximately +180℃, is canceled when this goes below approximately
+100℃.
Since TSD operates persistently with the purpose of preventing chip damage, be aware that long-term use in the vicinity
that TSD affects decrease IC reliability.
Temperature Derating Curve
Reference Data
VQFN024V4040
3.5
③3.1W
Power dissipation Pd（W）
3.1
measurement conditions
： IC unit Rohm standard board mounted
board size ： 74.2mm×74.2mm×1.6mmt
board① FR4 1-layer glass epoxy board(Copper on top layer 0%)
board② FR4 4-layer glass epoxy board(Copper on 2,3 layer 100%)
board size ： 35mm×25mm×1.6mmt
board③ FR4 4-layer glass epoxy board(Copper on 2,3 layer 100%)
connecting with thermal via
2.5
②2.2W
2.2
2.0
1.5
1.0
①0.7W
0.7
0.5
0.0
0
25
50
75
85
100
125
150
Ambient temperature Ta（℃）
Note) Values are actual measurements and are not guaranteed.
Power dissipation values vary according to the board on which the IC is mounted. The Power dissipation of this IC
when mounted on a multilayer board designed to radiate is greater than the values in the graph above.
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© 2009 ROHM Co., Ltd. All rights reserved.
13/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●TYPICAL CHARACTERISTICS
TABLE OF GRAPHS
Items
Parameter
Figure
Efficiency
vs Output power
1, 2
Power dissipation
vs Output power
3, 4
Supply current
(Iccact)
vs Supply voltage
5
Supply current
(Istby)
vs Supply voltage
6
Supply current
(Ireg)
vs Supply voltage
7
vs Supply voltage
8
vs Load resistance
9, 10
vs Supply voltage
11, 12
vs Output power
13, 14
Shutdown current (Isd)
Output power
(Po)
Total harmonic distortion plus noise
(THD+N)
vs Frequency
vs Common-mode input voltage
Supply voltage rejection ratio
23, 24
vs Frequency
25, 26, 27, 28
Common-mode rejection ratio (CMRR)
vs Frequency
29, 30
Gain
vs Frequency
31, 32, 33, 34, 35, 36, 37, 38
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© 2009 ROHM Co., Ltd. All rights reserved.
(PSRR)
15, 16, 17, 18, 19, 20, 21,22
14/21
2009.07 - Rev.A
Technical Note
BD5471MUV
Efficiency - Output power
f=1kHz RL=8Ω+33uH LC-filter(22uH+1uF)
Efficiency vs Output power
f=1kHz RL=4Ω+33uH LC-filter(22uH+1uF)
80
80
70
70
60
Efficiency [%]
90
90
Efficiency [%]
100
60
50
VDD=2.5V
VDD=3.6V
VDD=5.0V
40
30
40
30
20
20
10
10
0
VDD=2.5V
VDD=3.6V
VDD=5.0V
50
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Po [W]
1
0
1.1 1.2
0.2
0.4
0.6
0.8
Fig.1
600
300
500
250
1.8
2
400
Icc [mA]
Icc [mA]
1.6
Fig.2
350
200
150
VDD=2.5V
VDD=3.6V
VDD=5.0V
100
50
300
VDD=2.5V
VDD=3.6V
VDD=5.0V
200
100
0
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Po [W]
1
0
1.1 1.2
0.2
0.4
0.6
0.8
Fig.3
1 1.2
Po [W]
1.4
1.6
1.8
2
Fig.4
Icc - VDD
No load, No signal
Iccstby - VDD
No load, No signal
6
0.3
5
0.25
4
0.2
Iccstby [mA]
Icc [mA]
1.4
Icc vs Output power
f=1kHz RL=4Ω+33uH LC-filter(22uH+1uF)
Icc vs Output power
f=1kHz RL=8Ω+33uH LC-filter(22uH+1uF)
3
2
1
0.15
0.1
0.05
0
0
0
1
2
3
VDD [V]
4
5
6
0
1
2
Fig.5
3
VDD [V]
4
5
6
Fig.6
Iccreg - VDD
No load, No signal
Iccsd - VDD
0.3
0.5
0.25
0.4
0.2
Isd [uA]
Iccreg [mA]
1 1.2
Po [W]
0.15
0.3
0.2
0.1
0.1
0.05
0
0
0
1
2
3
VDD [V]
4
5
0
6
Fig.7
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© 2009 ROHM Co., Ltd. All rights reserved.
1
2
3
VDD [V]
4
5
6
Fig.8
15/21
2009.07 - Rev.A
Technical Note
4
BD5471MUV
Output power vs RL THD+N=10%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
Output power vs RL THD+N=1%
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
2.5
3.0
2.5
1.5
VDD=2.5V
VDD=3.6V
VDD=5.0V
1.5
Po[W]
2.0
Po[W]
2.0
VDD=2.5V
VDD=3.6V
VDD=5.0V
1.0
1.0
0.5
0.5
0.0
0.0
4
8
12
16
20
RL[Ω]
24
28
4
32
8
12
16
20
RL[Ω]
Fig.9
2.5
32
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
4.0
RL=8Ω：THD+N=1%
3.5
RL=8Ω：THD+N=10%
3.0
2.0
RL=4Ω：THD+N=1%
RL=4Ω：THD+N=10%
2.5
Po [W]
Po [W]
28
Fig.10
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
3.0
24
1.5
2.0
1.5
1.0
1.0
0.5
0.5
0.0
0.0
4.5
4.7
4.9
5.1
5.3
5.5
4.5
VDD [V]
4.7
4.9
VDD [V]
Fig.11
10
VDD=4.5V
VDD=5.0V
VDD=5.0V
VDD=5.5V
VDD=5.5V
THD+N [%]
THD+N [%]
5.5
THD+N vs Output power RL=4Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
VDD=4.5V
1
1
0.1
0.01
0.1
1
0.1
0.01
10
Po [W]
0.1
10
10
THD+N [%]
Po=50mW
Po=250mW
Po=1W
1
1
THD+N vs Frequency VDD=5.5V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
THD+N vs Frequency VDD=5.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
Po [W]
Fig.14
Fig.13
THD+N [%]
5.3
Fig.12
THD+N vs Output power RL=8Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
10
5.1
0.1
Po=50mW
Po=250mW
Po=1W
1
0.1
0.01
0.01
10
100
1k
freq [Hz]
10k
100k
Fig.15
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© 2009 ROHM Co., Ltd. All rights reserved.
10
100
1k
freq [Hz]
10k
100k
Fig.16
16/21
2009.07 - Rev.A
Technical Note
BD5471MUV
THD+N vs Frequency VDD=5.0V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
Po=50mW
Po=250mW
Po=1W
1
Po=50mW
Po=250mW
Po=1W
1
THD+N [%]
THD+N [%]
10
THD+N vs Frequency VDD=5.0V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
0.1
0.1
0.01
0.01
10
freq [Hz]
1k
freq [Hz]
Fig.17
Fig.18
100
1k
10k
10
100k
THD+N vs Frequency VDD=4.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
100
10k
100k
THD+N vs Frequency VDD=4.5V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
Po=50mW
Po=250mW
Po=500mW
Po=50mW
Po=250mW
Po=500mW
1
THD+N [%]
THD+N [%]
1
0.1
0.01
10
100
1k
freq [Hz]
10k
0.1
0.01
100k
10
100
1k
freq [Hz]
Fig.19
100k
Fig.20
THD+N vs Frequency RL=8Ω Po=125mW
LC-filter(22uH+1uF) 30kHz-LPF
10
10k
THD+N vs Frequency RL=4Ω Po=250mW
LC-filter(22uH+1uF) 30kHz-LPF
10
VDD=4.5V
VDD=5.0V
VDD=5.5V
1
THD+N [%]
THD+N [%]
1
VDD=4.5V
VDD=5.0V
VDD=5.5V
0.1
0.1
0.01
0.01
10
100
1k
freq [Hz]
10k
100k
10
100
1k
freq [Hz]
Fig.21
THD+N_vs_Common Mode Input Voltage f=1kHz
RL=4Ω Po=200mW LC-filter(22uH+1uF) 400Hz-30kHz
2.0
VDD=4.5V
VDD=5.0V
VDD=5.5V
VDD=4.5V
VDD=5.0V
VDD=5.5V
1.5
THD+N [%]
THD+N [%]
1.5
100k
Fig.22
THD+N_vs_Common Mode Input Voltage f=1kHz
RL=8Ω Po=100mW LC-filter(22uH+1uF) 400Hz-30kHz
2.0
10k
1.0
1.0
0.5
0.5
0.0
0.0
0
1
2
3
4
5
6
0
7
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2
3
4
5
6
7
Fig.24
Fig.23
© 2009 ROHM Co., Ltd. All rights reserved.
1
Vic - Common Mode Input Voltage [V]
Vic - Common Mode Input Voltage [V]
17/21
2009.07 - Rev.A
Technical Note
BD5471MUV
PSRR RL=4Ω Vripple=0.1Vpp Inputs ac-Grounded
Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
PSRR RL=8Ω Vripple=0.1Vpp Inputs ac-Grounded
Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
0
0
-10
-10
VDD=4.5V
VDD=5.0V
VDD=5.5V
VDD=4.5V
VDD=5.0V
VDD=5.5V
-20
-30
PSRR [dB]
PSRR [dB]
-20
-40
-50
-30
-40
-50
-60
-60
-70
-70
-80
-80
10
100
1k
f [Hz]
10k
100k
10
100
1k
f [Hz]
PSRR RL=4Ω Vripple=0.1Vpp Inputs Floating
LC-filter(22uH+1uF) 30kHz-LPF
PSRR RL=8Ω Vripple=0.1Vpp Inputs Floating
LC-filter(22uH+1uF) 30kHz-LPF
0
0
-10
-10
VDD=4.5V
VDD=5.0V
VDD=5.5V
VDD=4.5V
VDD=5.0V
VDD=5.5V
-20
PSRR [dB]
PSRR [dB]
-30
-40
-50
-30
-40
-50
-60
-60
-70
-70
-80
-80
10
100
1k
f [Hz]
10k
10
100k
100
1k
f [Hz]
100k
CMRR RL=4Ω Vin=1Vpp Cin=1uF
LC-filter(22uH+1uF) 30kHz-LPF
-40
-40
-45
-45
CMRR [dB]
VDD=4.5V
VDD=5.0V
VDD=5.5V
-50
CMRR [dB]
10k
Fig.28
Fig.27
CMRR RL=8Ω Vin=1Vpp Cin=1uF
LC-filter(22uH+1uF) 30kHz-LPF
-55
-60
-65
VDD=4.5V
VDD=5.0V
VDD=5.5V
-50
-55
-60
-65
-70
-70
10
100
1k
freq [Hz]
10k
100k
10
100
10k
100k
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
10
8
8
6
6
gain [dB]
10
4
VDD=4.5V
VDD=5.0V
VDD=5.5V
2
1k
freq [Hz]
Fig.30
Fig.29
Gain vs Frequency RL=8Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
gain [dB]
100k
Fig.26
Fig.25
-20
10k
4
VDD=4.5V
VDD=5.0V
VDD=5.5V
2
0
0
10
100
1k
freq [Hz]
10k
10
100k
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1k
freq [Hz]
10k
100k
Fig.32
Fig.31
© 2009 ROHM Co., Ltd. All rights reserved.
100
18/21
2009.07 - Rev.A
Technical Note
BD5471MUV
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
16
16
14
14
12
12
gain [dB]
gain [dB]
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
10
10
VDD=4.5V
VDD=5.0V
VDD=5.5V
8
VDD=4.5V
VDD=5.0V
VDD=5.5V
8
6
6
10
100
1k
freq [Hz]
10k
100k
10
100
26
26
24
24
22
22
20
20
18
18
16
14
VDD=4.5V
VDD=5.0V
VDD=5.5V
16
14
12
VDD=4.5V
VDD=5.0V
VDD=5.5V
10
8
8
6
6
10
100
1k
freq [Hz]
10k
100k
10
100
28
28
26
26
24
24
22
22
gain [dB]
30
20
18
VDD=4.5V
VDD=5.0V
VDD=5.5V
14
10k
100k
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
30
16
1k
freq [Hz]
Fig.36
Fig.35
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
gain [dB]
100k
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
gain [dB]
gain [dB]
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
10
10k
Fig.34
Fig.33
12
1k
freq [Hz]
20
18
16
VDD=4.5V
VDD=5.0V
VDD=5.5V
14
12
12
10
10
10
100
1k
freq [Hz]
10k
100k
10
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1k
freq [Hz]
10k
100k
Fig.38
Fig.37
© 2009 ROHM Co., Ltd. All rights reserved.
100
19/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Notes for use
(1) Absolute maximum ratings
This IC may be damaged if the absolute maximum ratings for the applied voltage, temperature range, or other parameters
are exceeded. Therefore, avoid using a voltage or temperature that exceeds the absolute maximum ratings.
If it is possible that absolute maximum ratings will be exceeded, use fuses or other physical safety measures and determine
ways to avoid exceeding the IC's absolute maximum ratings.
(2) GND terminal’s potential
Try to set the minimum voltage for GND terminal’s potential, regardless of the operation mode.
(3) Shorting between pins and mounting errors
When mounting the IC chip on a board, be very careful to set the chip's orientation and position precisely.
When the power is turned on, the IC may be damaged if it is not mounted correctly.
The IC may also be damaged if a short occurs (due to a foreign object, etc.) between two pins, between a pin and
the power supply, or between a pin and the GND.
(4) Operation in strong magnetic fields
Note with caution that operation faults may occur when this IC operates in a strong magnetic field.
(5) Thermal design
Ensure sufficient margins to the thermal design by taking in to account the allowable power dissipation during actual use
modes, because this IC is power amp. When excessive signal inputs which the heat dissipation is insufficient condition, it is
possible that thermal shutdown circuit is active.
(6) Thermal shutdown circuit
This product is provided with a built-in thermal shutdown circuit. When the thermal shutdown circuit operates,
the output transistors are placed under open status. The thermal shutdown circuit is primarily intended to shut down the IC
avoiding thermal runaway under abnormal conditions with a chip temperature exceeding Tjmax = +150℃, and is not
intended to protect and secure an electrical appliance.
(7) Load of the output terminal
This IC corresponds to dynamic speaker load, and doesn't correspond to the load except for dynamic speakers.
(8) The short protection of the output terminal
This IC is built in the short protection for a protection of output transistors.
When the short protection is operated, output terminal become Hi-Z condition and is stopped with latch.
Once output is stopped with latch, output does not recover automatically by canceling the short-circuiting condition.
The condition of stopping with latch is cancelled, when power supply or mute signal is turned off and turned on again.
(9) Operating ranges
The rated operating power supply voltage range (VDD=+4.5V～+5.5V) and the rated operating temperature range
(Ta=-40℃～+85℃) are the range by which basic circuit functions is operated. Characteristics
and rated output power are not guaranteed in all power supply voltage ranges or temperature ranges.
(10) Electrical characteristics
Electrical characteristics show the typical performance of device and depend on board layout, parts, power supply.
The standard value is in mounting device and parts on surface of ROHM’s board directly.
(11) Maximum output power
When stereo inputs at RL=4Ω, maximum output power may not achieve up to typical value because the device heats.
Ensure sufficient margins to the thermal design to get larger output power.
(12) Power decoupling capacitor
Because the big peak current flows through the power line,
the class-D amplifier has an influence on the Audio characteristic by the capacitance value or the arrangement part of the
power decoupling capacitor.
(13) Power supply
Use single power supply, because power supplies (4,10,15,21pin) of audio amplifier
and regulator are shorted inside.Audio
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© 2009 ROHM Co., Ltd. All rights reserved.
20/21
2009.07 - Rev.A
Technical Note
BD5471MUV
●Ordering part number
B
D
5
Part No.
4
7
1
M
Part No.
5471
U
V
-
Package
MUV：VQFN024V4040
E
2
Packaging and forming specification
E2: Embossed tape and reel
VQFN024V4040
<Tape and Reel information>
4.0±0.1
4.0±0.1
1.0MAX
2.4±0.1
0.4±0.1
7
12
19
18
0.5
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
6
24
0.75
E2
2.4±0.1
1
2500pcs
(0.22)
+0.03
0.02 -0.02
S
C0.2
Embossed carrier tape
Quantity
Direction
of feed
1PIN MARK
0.08 S
Tape
13
+0.05
0.25 -0.04
1pin
(Unit : mm)
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© 2009 ROHM Co., Ltd. All rights reserved.
Reel
21/21
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2009.07 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,
fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of
any of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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© 2009 ROHM Co., Ltd. All rights reserved.
R0039A