Datasheet Download

Small-sized Class-D Speaker Amplifiers
Analog Input
Stereo Class-D Speaker Amplifier
BD5471MUV
No.13101EBT03
●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℃)
Parameter
Power Supply Voltage
Power Dissipation
Symbol
Ratings
Unit
VDD
7.0
V
0.7 *1
W
Pd
2.2 *2
W
Storage Temperature Range
Tstg
-55 ~ +150
℃
Input Voltage Range *3
Vin
-0.3 ~ VDD+0.3
V
Control Terminal
Input Voltage Range *4
Vctl
-0.3 ~ VDD+0.3
V
*1
*2
*3
*4
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
4.2mm×74.2mm×1.6mm, FR4 4-layer glass epoxy board (Copper on bottom 2 and 3 layer 100%)
input Terminal (INL+, INL-, INR+, INR-)
Control Terminal (MUTE, G0, G1, EAPD, BEEP, REG_SD)
●Operating Conditions
Parameter
Symbol
Ratings
Unit
Power Supply Voltage
VDD
+4.5 ~ +5.5
V
Temperature Range
Topr
-40 ~ +85
℃
* These products aren’t designed for protection against radioactive rays.
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© 2013 ROHM Co., Ltd. All rights reserved.
1/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Electric Characteristics(Unless otherwise specified, Ta=+25℃, VDD=+5.0V, RL=8Ω, AC item= LC Filter(L=22µH, C=1µF) )
Parameter
Symbol
Limits
Unit
Conditions
MIN.
TYP.
MAX.
ICC
―
5.5
12.0
mA
Active mode,
MUTE=H, EAPD=H, No load
Circuit current (Standby)
ISTBY
―
0.1
1.0
mA
Standby mode, MUTE=H,EAPD=L
Circuit current (Regulator)
ICCR
―
0.15
1.0
mA
Circuit current (Shutdown)
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
6.0
6.5
dB
BTL, G0=G1=GND
11.5
12
12.5
dB
BTL, G0=GND, G1=VDD
17.5
18
18.5
dB
BTL, G0=VDD, G1=GND
23.5
24
24.5
dB
BTL, G0=G1=VDD
THD+N
―
0.2
1.0
%
BTL, Po=0.7*PO1 *1, *2
CT
60
70
―
dB
BTL, f=1kHz *1, *3
S/N
SNR
70
90
―
dB
BTL, Po=PO1 *1, *3
Switching Frequency
fosc
175
250
325
kHz
Start-up time
Ton
0.78
1.02
1.46
msec
63
90
117
kΩ
G0=G1=GND
42
60
78
kΩ
G0=GND, G1=VDD
25
36
47
kΩ
G0=VDD, G1=GND
14
20
26
kΩ
G0=G1=VDD
Circuit current (Active)
Regulator Mode, MUTE=EAPD=L
REG_SD=H
Shutdown mode, MUTE=L,
REG_SD=L
<Speaker Amplifier>
Voltage gain
GV
Total harmonic distortion
Crosstalk
Input resistance
RIN
BTL, f=1kHz, THD+N=1%,
Stereo input, *1, *2
BTL, f=1kHz, THD+N=10%,
Stereo input, *1, *2
<Regulator>
Output voltage
Vo
3.15
3.30
3.45
V
Io=150mA
Maximum output current
Iom
150
200
―
mA
Vo=3.15V
Load regulation
LREG
―
0.2
1
mV/mA Io=0→150mA
<Control terminal (MUTE, G0, G1, EAPD, BEEP, REG_SD) >
Control terminal
input voltage
High-level
VCTLH
1.4
―
VDD
V
Low-level
VCTLL
0
―
0.4
V
ICTL
22
33
44
µA
Control terminal input current
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
H/L
Conditions
IC active/ shutdown
EAPD
H/L
IC active/standby
BEEP
H/L
IC active/standby
REG_SD
H/L
REG active/shutdown
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© 2013 ROHM Co., Ltd. All rights reserved.
2/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Measurement Circuit Diagram
Vin
C8
0.1μ F
INL+
Vin
Vin
C7
0.1μF
AGND
INL-
23
24
+B
21
C5
0.1μF
INR
20
C4
0.1μF
INR+
19
BEEP
VBEEP
A
1
150k
150k
BEEP
DET
Gain
Select
C1
0.01u
F
G0
G1
G1
Gain
Select
G0
G1
150k
OUTR
SHORT
SHORT
PVDD
SHORT
UVLO TSD SHOR
HBridge
PWM
STOP
HBridg
PWM
BEEP
MUTE
EAPD
C11
8Ω
VG1
A
22μF
1μF
V VSE
PVDD
15
4
VBTL V
17
16
3
VDD
A
BEEP
OUTL
1μF
18
G1
2
V SE V
VG0
G0
G0
DET_C
22μF
AVDD
C9
22
Vin
VDD
10u
F
C6
PGNDL
OSC
BIAS
UVLO
UVLO
TSD
TSD
8Ω
V
VBTL
PGND
14
5
SHORT
22μF
OUTL-
SHORT
SHORT
VSE V
1μF
OUTR-
22μF
13
6
MUT
E
150k
7
MUTE
A
EAPD
8
EAP
A
VMUTE
1μF
3.3VRE
150k
9
REG_S
10 REG_VD
A
VEAPD
11
REG_OU
C3
C2
12
V VSE
REG_GN
2.2μF
VREG_
SD
VDD
●Package Outlines
Top View
Bottom View
D5471
(Unit: mm)
VQFN024V4040 (Plastic Mold)
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© 2013 ROHM Co., Ltd. All rights reserved.
3/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Block Diagram
●Pin Assignment <top view>
PWM
HBridge
INL23
6
OUTL-
24
23
22
21
20
19
INR+
Gain
Select
OUTL+
3
INR-
AVDD
21
AVDD
PVDDR
15
AGND
10
INL+
24
INL-
REG_VDD
4
INL+
PVDDL
ERROR
G1
Short
Protection
Gain
Select
PWM
INR20
HBridge
OUTR+
16
13
OUTR-
ERROR
G1
G0
G0
18
2
DET_C
G1
17
3
OUTL+
OUTR+
16
4
PVDDL
PVDDR
15
5
PGNDL
PGNDR
14
6
OUTL-
OUTR-
13
Short
150k
Control
Logic
TSD
G1
ERROR
Bias
BEEP
1
DET_C
2
REG GND
150k
EAPD
8
REG OUT
150k
MUTE
7
REG VDD
UVLO
REG SD
G1
17
BEEP
EAPD
G0
G0
18
1
MUTE
G0
INR+
19
7
8
9
10
11
12
OSC
150k
BEEP
Detect
150k
Short
Protection
REG_SD
9
3.3V
REG
REG_OUT
11
150k
12
REG_GND
5
PGNDL
●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
14
22
PGNDR
AGND
PIN Name
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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© 2013 ROHM Co., Ltd. All rights reserved.
4/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Application Circuit Example
C5
10μF
PVDDL
Audio
InputL+
0.1μF
Audio
InputL-
10
Gain
Select
0.1μF
AVDD
21
INL+
24
C2
Differential
Input
PVDDR
15
REG_VDD
4
ERROR
G0
0.1μF
Audio
InputR-
G1
Gain
Select
0.1μF
Short
Protection
Short
INR+
19
C4
Differential
Input
OUTR+
16
HBridge
PWM
INR20
13
OUTR-
ERROR
C3
G0
G0
18
G0
Gain
Control
6
OUTL-
INL23
C1
Audio
InputR+
OUTL+
3
HBridge
PWM
G1
G0
Short
G1
UVLO
150k
G1
G1
17
MUTE
MUTE
7
EAPD
EAPD
8
Control
Logic
TSD
ERROR
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
PGNDL
REG_GND
2.2μF
22
14
5
12
PGNDR
AGND
Differential input
C5
10μF
PVDDL
Audio
Input L
Single-Ended
Input
REG_VDD
4
0.1μF
PVDDR
15
10
AVDD
21
INL+
24
Gain
Select
C2
PWM
HBridge
INL23
C1
Audio
Input R
G0
0.1μF
G1
Gain
Select
PWM
INR20
Gain
Control
HBridge
OUTR+
16
13
OUTR-
ERROR
0.1μF
G0
G0
18
G0
Short
Protection
Short
INR+
19
C4
C3
6
OUTL-
ERROR
0.1μF
Single-Ended
Input
OUTL+
3
G1
G0
Short
G1
UVLO
150k
G1
G1
17
MUTE
MUTE
7
EAPD
EAPD
8
Control
Logic
TSD
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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© 2013 ROHM Co., Ltd. All rights reserved.
5/21
2013.11 - Rev.B
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
INR-
19
INR+
BEEP
JP1
1
C1
G0
G0
150k
150k
BEEP
DET
DET_C
18
G1
2
Gain
Select
G0
G1
G1
Gain
Select
G0
G1
150k
17
JP4
JP5
BEEP
OUTL+
OUTR+
16
3
SHORT
SHORT
SHORT
UVLO TSD SHORT
HBridge
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
MUTE
150k
7
MUTE
EAPD
3.3VREG
150k
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=+4.5~5.5V) line.
Please connect
to Speaker.
Please connect
to GND line.
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© 2013 ROHM Co., Ltd. All rights reserved.
6/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Evaluation board Parts List
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
1
PCB1
IC, BD5471MUV,
Stereo Class-D audio
amplifier
Printed-circuit board,
BD5471MUV EVM
Manufacturer/Part Number
Murata
GRM188R71C103KA01D
Murata
GRM188R61C225KE15D
Murata
GRM188R71C104KA01D
ROHM
TCFGA1A106M8R
4.0mm X 4.0mm
VQFN Package
―
ROHM
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
①Power 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 formula.
Toff 
C1 0.8VDD
[ms]
5μ
②Regulator output capacitor(C2)
Output capacitor of 3.3V regulator.
Use capacitance equal to or more than 1uF.
③Input coupling capacitor Ci (C3,C4, C6,C7)
It makes an Input coupling capacitor 0.1µF.
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.
④The 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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© 2013 ROHM Co., Ltd. All rights reserved.
7/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Evaluation board PCB layer
Top Layer
Bottom Layer
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© 2013 ROHM Co., Ltd. All rights reserved.
8/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●The way of evaluating Audio characteristics
Evaluation Circuit Diagram
C5
10μF
PVDDL
Audio
InputL+
0.1μF
Audio
InpuLt-
10
OUTL+ 22μF
3
Gain
Select
0.1μF
PWM
ERROR
G0 G1
0.1μF
Audio
InputR-
Gain
Select
0.1μF
PWM
INR20
G0
G1
G1
17
MUTE
MUTE
7
EAPD
EAPD
8
BEEP
1
BEEP
DET_C
2
0.01μF
H:Active
REG_SD
G0
Audio
1μF
Precision
1μF
etc.
RL=Speaker Load
Measurement Instrument
OUTR 22μF
16
Audio
1μF
RL BTL
13
22μF
OUTR-
Precision
1μF
etc.
RL=Speaker Load
Short
150k
Control
Logic
TSD
G1
ERROR
UVL
150k
150k
Bias
OSC
150k
BEEP
Detect
150k
C8
Short
Protection
REG_S
9
L:Shutdown
6
22μF
OUTL-
G0 G1
G0
18
Measurement Instrument
RL BTL
HBridge
ERROR
C3
Gain
Control
Short
Protection
Short
INR+
19
C4
Differential
Input
HBridge
INL23
C1
Audio
InputR+
AVDD
21
INL+
24
C2
Differential
Input
PVDDR
15
REG_VDD
4
3.3V
REG
REG_OUT
11
150k
C7
12
REG_GND
5
PGNDL
2.2μF
22
14
PGNDR 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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© 2013 ROHM Co., Ltd. All rights reserved.
9/21
2013.11 - Rev.B
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
5µ
[msec]
Example C=0.01µ, 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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© 2013 ROHM Co., Ltd. All rights reserved.
10/21
2013.11 - Rev.B
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 consumption reduces.
The current consumption
in the audio part is zero.
Speaker output
Input
Output
MUTE
EAPD
BEEP
Audio IN
Amplifier state
Speaker output
L
L
L
No signal
L(Shutdown)
Hiz
L
L
L
signal
L(Shutdown)
Hiz
L
L
H
No signal
L(Shutdown)
Hiz
L
L
H
signal
L(Shutdown)
Hiz
L
H
L
No signal
L(Shutdown)
Hiz
L
H
L
signal
L(Shutdown)
Hiz
L
H
H
No signal
L(Shutdown)
Hiz
L
H
H
signal
L(Shutdown)
Hiz
H
L
L
No signal
L(Standby)
Hiz
H
L
L
signal
L(Standby)
Hiz
H
L
H
No signal
H(Active)
No signal
H
L
H
signal
H(Active)
signal
H
H
L
No signal
H(Active)
No signal
H
H
L
signal
H(Active)
signal
H
H
H
No signal
H(Active)
No signal
H
H
H
signal
H(Active)
signal
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© 2013 ROHM Co., Ltd. All rights reserved.
11/21
2013.11 - Rev.B
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-
Short
Protection
Short
Protection
H-
Bridge
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© 2013 ROHM Co., Ltd. All rights reserved.
OUTR+
OUTR-
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.
12/21
2013.11 - Rev.B
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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© 2013 ROHM Co., Ltd. All rights reserved.
13/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Typical Characteristics
TABLE OF GRAPHS
Parameter
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
(PSRR)
15, 16, 17, 18, 19, 20, 21,22
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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© 2013 ROHM Co., Ltd. All rights reserved.
14/21
2013.11 - Rev.B
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
1 1.2
Po [W]
1.4
1.6
1.8
2
Fig.4
Fig.3
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
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2
3
VDD [V]
4
5
6
Fig.8
Fig.7
© 2013 ROHM Co., Ltd. All rights reserved.
1
15/21
2013.11 - Rev.B
Technical Note
BD5471MUV
4
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
Fig.9
2.5
28
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]
24
Fig.10
Output power vs VDD
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
3.0
16
20
RL[Ω]
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
Fig.11
10
5.5
VDD=4.5V
VDD=5.0V
VDD=5.0V
VDD=5.5V
VDD=5.5V
THD+N [%]
THD+N [%]
5.3
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 [%]
5.1
Fig.12
THD+N vs Output power RL=8Ω
f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
10
VDD [V]
0.1
Po=50mW
Po=250mW
Po=1W
1
0.1
0.01
0.01
10
100
1k
freq [Hz]
10k
100k
10
Fig.15
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100
1k
freq [Hz]
10k
100k
Fig.16
16/21
2013.11 - Rev.B
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
THD+N vs Frequency VDD=5.0V RL=4Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
Po=50mW
Po=250mW
Po=1W
1
THD+N [%]
THD+N [%]
10
0.1
0.1
0.01
0.01
10
100
1k
10k
10
100k
100
1k
freq [Hz]
freq [Hz]
Fig.17
100k
Fig.18
THD+N vs Frequency VDD=4.5V RL=8Ω
LC-filter(22uH+1uF) 30kHz-LPF
10
10k
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
100k
0.1
0.01
10
100
1k
freq [Hz]
100k
Fig.20
Fig.19
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
Fig.23
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© 2013 ROHM Co., Ltd. All rights reserved.
1
2
3
4
5
6
7
Vic - Common Mode Input Voltage [V]
Vic - Common Mode Input Voltage [V]
Fig.24
17/21
2013.11 - Rev.B
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
-20
VDD=4.5V
VDD=5.0V
VDD=5.5V
-20
-30
PSRR [dB]
PSRR [dB]
-10
VDD=4.5V
VDD=5.0V
VDD=5.5V
-40
-50
-30
-40
-50
-60
-60
-70
-70
-80
-80
10
100
1k
f [Hz]
10k
100k
10
100
1k
f [Hz]
Fig.25
Fig.26
0
0
-10
-10
VDD=4.5V
VDD=5.0V
VDD=5.5V
-30
VDD=4.5V
VDD=5.0V
VDD=5.5V
-20
PSRR [dB]
PSRR [dB]
-20
-40
-50
-30
-40
-50
-60
-60
-70
-70
-80
-80
10
100
1k
f [Hz]
10k
10
100k
100
1k
f [Hz]
Fig.27
10k
100k
Fig.28
CMRR RL=8Ω Vin=1Vpp Cin=1uF
LC-filter(22uH+1uF) 30kHz-LPF
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]
100k
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
-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
Fig.29
10k
100k
Fig.30
10
8
8
6
6
gain [dB]
10
4
VDD=4.5V
VDD=5.0V
VDD=5.5V
2
1k
freq [Hz]
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
Gain vs Frequency RL=8Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
gain [dB]
10k
4
VDD=4.5V
VDD=5.0V
VDD=5.5V
2
0
0
10
100
1k
freq [Hz]
10k
10
100k
Fig.31
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100
1k
freq [Hz]
10k
100k
Fig.32
18/21
2013.11 - Rev.B
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
Fig.33
24
22
22
20
20
18
18
gain [dB]
gain [dB]
26
24
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
26
26
24
24
22
22
gain [dB]
30
28
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
26
10
10k
Fig.34
Gain_vs_Frequency RL=4Ω
Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
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
Fig.37
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100
1k
freq [Hz]
10k
100k
Fig.38
19/21
2013.11 - Rev.B
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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20/21
2013.11 - Rev.B
Technical Note
BD5471MUV
●Ordering part number
B
D
5
Part No.
4
7
1
Part No.
5471
M
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
Reel
(Unit : mm)
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21/21
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2013.11 - Rev.B
Datasheet
Notice
Precaution on using ROHM Products
1.
Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,
OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you
(Note 1)
, transport
intend to use our Products in devices requiring extremely high reliability (such as medical equipment
equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car
accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or
serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.
Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any
damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific
Applications.
(Note1) Medical Equipment Classification of the Specific Applications
JAPAN
USA
EU
CHINA
CLASSⅢ
CLASSⅡb
CLASSⅢ
CLASSⅢ
CLASSⅣ
CLASSⅢ
2.
ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor
products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate
safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which
a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety
[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3.
Our Products are designed and manufactured for use under standard conditions and not under any special or
extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way
responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any
special or extraordinary environments or conditions. If you intend to use our Products under any special or
extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of
product performance, reliability, etc, prior to use, must be necessary:
[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents
[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust
[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,
H2S, NH3, SO2, and NO2
[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves
[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items
[f] Sealing or coating our Products with resin or other coating materials
[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning
residue after soldering
[h] Use of the Products in places subject to dew condensation
4.
The Products are not subject to radiation-proof design.
5.
Please verify and confirm characteristics of the final or mounted products in using the Products.
6.
In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,
confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power
exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect
product performance and reliability.
7.
De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual
ambient temperature.
8.
Confirm that operation temperature is within the specified range described in the product specification.
9.
ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in
this document.
Precaution for Mounting / Circuit board design
1.
When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product
performance and reliability.
2.
In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the
ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
Precautions Regarding Application Examples and External Circuits
1.
If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the
characteristics of the Products and external components, including transient characteristics, as well as static
characteristics.
2.
You agree that application notes, reference designs, and associated data and information contained in this document
are presented only as guidance for Products use. Therefore, in case you use such information, you are solely
responsible for it and you must exercise your own independent verification and judgment in the use of such information
contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses
incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper
caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be
applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,
isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).
Precaution for Storage / Transportation
1.
Product performance and soldered connections may deteriorate if the Products are stored in the places where:
[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2
[b] the temperature or humidity exceeds those recommended by ROHM
[c] the Products are exposed to direct sunshine or condensation
[d] the Products are exposed to high Electrostatic
2.
Even under ROHM recommended storage condition, solderability of products out of recommended storage time period
may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is
exceeding the recommended storage time period.
3.
Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads
may occur due to excessive stress applied when dropping of a carton.
4.
Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of
which storage time is exceeding the recommended storage time period.
Precaution for Product Label
QR code printed on ROHM Products label is for ROHM’s internal use only.
Precaution for Disposition
When disposing Products please dispose them properly using an authorized industry waste company.
Precaution for Foreign Exchange and Foreign Trade act
Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,
please consult with ROHM representative in case of export.
Precaution Regarding Intellectual Property Rights
1.
All information and data including but not limited to application example contained in this document is for reference
only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any
other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable
for infringement of any intellectual property rights or other damages arising from use of such information or data.:
2.
No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any
third parties with respect to the information contained in this document.
Other Precaution
1.
This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.
2.
The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written
consent of ROHM.
3.
In no event shall you use in any way whatsoever the Products and the related technical information contained in the
Products or this document for any military purposes, including but not limited to, the development of mass-destruction
weapons.
4.
The proper names of companies or products described in this document are trademarks or registered trademarks of
ROHM, its affiliated companies or third parties.
Notice - GE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.002
Datasheet
General Precaution
1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.
ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny
ROHM’s Products against warning, caution or note contained in this document.
2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior
notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s
representative.
3.
The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all
information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or
liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or
concerning such information.
Notice – WE
© 2014 ROHM Co., Ltd. All rights reserved.
Rev.001
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