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Small-sized Class-D Speaker Amplifiers
Analog Input Stereo Class-D Speaker Amplifier
BD5471MUV
No.10101EAT03
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 0A 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=4, THD+N=10%, stereo input) High power 1.5W typ. (VDD=5V, RL=8, 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
Symbol VDD
Ratings 7.0 0.7 *1
Unit V W W V V
Power Dissipation
Pd 2.2 *2
Storage Temperature Range Input Voltage Range *3 Control Terminal Input Voltage Range *4
*1 *2 *3 *4
Tstg Vin Vctl
-55 ~ +150 -0.3 ~ VDD+0.3 -0.3 ~ VDD+0.3
74.2mmx74.2mmx1.6mm, 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 4.2mmx74.2mmx1.6mm, 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 Power Supply Voltage Temperature Range Symbol VDD Topr Ratings +4.5 ~ +5.5 -40 ~ +85 Unit V
* These products aren't designed for protection against radioactive rays.
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1/21
2010.06 - Rev.A
BD5471MUV
Technical Note
Electric Characteristics(Unless otherwise specified, Ta=+25, VDD=+5.0V, RL=8, AC item= LC Filter(L=22H, C=1F) ) Parameter Circuit current (Active) Circuit current (Standby) Circuit current (Regulator) Circuit current (Shutdown) Output power 1 Output power 2 PO1 PO2 0.8 1.0 5.5 11.5 Voltage gain GV 17.5 23.5 Total harmonic distortion Crosstalk S/N Switching Frequency Start-up time THD+N CT SNR fosc Ton 60 70 175 0.78 63 42 Input resistance RIN 25 14 Output voltage Maximum output current Load regulation Vo Iom LREG 3.15 150 3.30 200 0.2 3.45 1 V mA Io=150mA Vo=3.15V 1.2 1.5 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 W W dB dB dB dB % dB dB kHz msec k k k k G0=G1=GND G0=GND, G1=VDD G0=VDD, G1=GND G0=G1=VDD 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 Symbol ICC ISTBY ICCR ISD Limits MIN. TYP. 5.5 0.1 0.15 0.1 MAX. 12.0 1.0 1.0 2.0 Unit mA mA mA A 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
mV/mA Io=0150mA
Control terminal input voltage High-level Low-level VCTLH VCTLL ICTL 1.4 0 22 33 VDD 0.4 44 V V A Control terminal Input voltage VCTL=5V
Control terminal input current
*1: B.W.=400 ~ 30kHz, BTL:The voltage between 3pin and 6pin, 13pin and 16pin
Active / Standby Control Mode Pin level MUTE EAPD BEEP REG_SD H/L H/L H/L H/L
Conditions IC active/ shutdown IC active/standby IC active/standby REG active/shutdown
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2/21
2010.06 - Rev.A
BD5471MUV
Measurement Circuit Diagram
Vin Vin 10u F C6 INLAGND VDD C5 0.1F INR C4 0.1F INR Vin Vin
Technical Note
C8 0.1 F
INL+
C7 0.1F
24
VBEEP BEEP
23
22
C9
AVDD
+B
21
20
19
G0 G0 VG0
A
1
150k
150k
18
A
DET_C
BEEP DET Gain Select BEEP G0 G1 G0 G1 Gain Select G1 150k
G1
VG1
2
C1 0.01u F 22F OUTL
17
A
OUTR
22F
3
V SE V 1F VDD PVDD SHORT SHORT HBridge PWM
UVLO TSD SHOR
16
SHORT PWM HBridg 1F
V VSE
STOP
PVDD
4
VBTL V 8 C11 PGNDL
BEEP MUTE EAPD
15
BIAS OSC UVLO TSD UVLO TSD PGND 8
V
VBTL
5
SHORT 22F VSE V 1F OUTLSHORT MUT E 150k EAPD 150k SHORT
14
OUTR-
22F
6
3.3VRE
13
1F
V VSE
7
A
MUTE
8
A
EAP
9
A
REG_S
10 REG_VD
C2
11
REG_OU C3 2.2F
12
REG_GN
VMUTE
VEAPD
VREG_
SD
VDD
Package Outlines Top View Bottom View
D5471
(Unit: mm) VQFN024V4040 (Plastic Mold)
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3/21
2010.06 - Rev.A
BD5471MUV
Block Diagram
PVDDL 4 INL+ 24 Gain Select INL23 ERROR G0 INR+ 19 Gain Select INR20 G0
150k REG_VDD
Technical Note
Pin Assignment
10 PVDDR 15 AVDD 21 OUTL+ 3 6 OUTL-
24 INL+
23 INL-
22 AGND
21 AVDD
20 INR-
19 INR+
PWM
HBridge
G1
Short Protection OUTR+ 16 13 OUTRERROR
1 2 3 4 5
BEEP DET_C OUTL+ PVDDL PGNDL OUTLREG VDD REG OUT REG GND REG SD
G0 G1 OUTR+ PVDDR PGNDR OUTR-
18 17 16 15 14 13
PWM
HBridge
G0 18 G1 17
150k
G1 G0 Short TSD G1 UVLO Control Logic ERROR
6
MUTE
Bias OSC
MUTE 7
150k
EAPD 8 BEEP 1 DET_C 2
150k
7
EAPD 8
9
10
11
12
150k
BEEP Detect
REG_SD
Short Protection REG
150k
9
3.3V
REG_OUT
11
12
REG_GND
5 PGNDL
14 PGNDR
22 AGND
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
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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4/21
2010.06 - Rev.A
BD5471MUV
Application Circuit Example
C5 10F
Technical Note
PVDDL
Audio InputL+ 0.1F C2 Differential Input Audio InputL0.1F C1 Audio InputR+
REG_VDD
4 INL+ 24 Gain Select INL23
10
PVDDR 15
AVDD 21 OUTL+ 3 6 OUTL-
PWM
HBridge ERROR
G0
0.1F C4
G1
INR+ 19 Gain Select INR20 G0
150k
Short
Short Protection OUTR+ 16 13 OUTRERROR
Differential Input
Audio InputR-
PWM
HBridge
0.1F C3
Gain Control
G0 G1
G0 18 G1 17
150k
G1 G0 Short TSD G1 UVLO Control Logic ERROR
MUTE
MUTE 7
150k
EAPD
EAPD 8 BEEP 1 DET_C 2
150k
Bias
OSC
BEEP
150k
BEEP Detect
0.01F
C8
HActive
REG_SD
REG_SD 9
150k
Short Protection REG 3.3V
REG_OUT
11
C7 2.2F
LShutdown
12
REG_GND
5 PGNDL
14 PGNDR
22 AGND
Differential input
C5 10F
PVDDL
Audio Input L Single-Ended Input 0.1F C2
REG_VDD
4 INL+ 24 Gain Select INL23
10
PVDDR 15
AVDD 21 OUTL+ 3 6 OUTL-
PWM
HBridge
C1 Audio Input R Single-Ended Input
0.1F
ERROR G0 G1 Short Short Protection OUTR+ 16 13 OUTRERROR G0 18
150k
0.1F C4
INR+ 19 Gain Select INR20
PWM
HBridge
C3
0.1F
G0
G1 G0 Short TSD G1 UVLO Control Logic ERROR
Gain Control
G0 G1
G1 17
150k
MUTE
MUTE 7
150k
EAPD
EAPD 8 BEEP 1 DET_C 2
150k
Bias
OSC
BEEP
150k
BEEP Detect
0.01F
C8
HActive
REG_SD
REG_SD 9
150k
Short Protection REG 3.3V
REG_OUT
11
C7 2.2F
LShutdown
12
REG_GND
5 PGNDL
14 PGNDR
22 AGND
Single-Ended input
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5/21
2010.06 - Rev.A
BD5471MUV
Evaluation board Circuit Diagram
Audio Input Audio Input
Technical Note
C5 C7 C6 C8 C4 C3
24
BEEP
INL+
23
INL-
22
AGND
21
AVDD
20
INR-
19
INR+
JP1
G0 G0
150k
1
150k
18
JP4
C1
DET_C
BEEP DET Gain Select BEEP G0 G1 G0 G1 Gain Select G1 150k
G1
2
17
JP5
OUTL+
OUTR+
3
SHORT SHORT PVDDL HBridge PWM
UVLO TSD SHORT
16
SHORT PWM HBridge
STOP
PVDDR
4
to Speaker (BTL) PGNDL
BEEP MUTE EAPD
15
BIAS OSC UVLO TSD UVLO TSD PGNDR to Speaker (BTL)
5
SHORT OUTLSHORT MUTE 150k EAPD 150k SHORT
14
OUTR-
6
3.3VREG
13
7
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=+2.55.5V) line. Please connect to Speaker. Please connect to GND line.
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6/21
2010.06 - Rev.A
BD5471MUV
Evaluation board Parts List Qty. 1 1 2 1 1 1 Item C1 C2 C3, C4,C6,C7 C5, C8 U1 PCB1 Description Capacitor, 0.01F Capacitor, 2.2F Capacitor, 0.1F Capacitor, 10F IC, BD5471MUV, Stereo Class-D audio amplifier Printed-circuit board, BD5471MUV EVM 1608 1608 1608 A (3216) 4.0mm X 4.0mm VQFN Package SMD Size
Technical Note
Manufacturer/Part Number Murata GRM188R71C103KA01D Murata GRM188R61C225KE15D Murata GRM188R71C104KA01D ROHM TCFGA1A106M8R ROHM BD5471MUV
The relation in the gain setting and input impedance Ri The gain setting terminal (G0,G1) G0 L L H H G1 L H L H Gain[dB] 6 12 18 24 Ri [Ohm] 90k 60k 36k 20k
Description of External parts 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 formula.
Toff C1 0.8VDD [ms] 5
Regulator output capacitor(C2) Output capacitor of 3.3V regulator. Use capacitance equal to or more than 1uF. 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=36k(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] 2 Ri Ci
In case of Ri=36k, Ci=0.1uF, it becomes fc=about 44Hz. 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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7/21
2010.06 - Rev.A
BD5471MUV
Evaluation board PCB layer Top Layer
Technical Note
Bottom Layer
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8/21
2010.06 - Rev.A
BD5471MUV
The way of evaluating Audio characteristics Evaluation Circuit Diagram
C5 10F
Technical Note
PVDDL
Audio InputL+ 0.1F C2 Differential Input Audio InpuLt0.1F C1 Audio InputR+
REG_VDD
4 INL+ 24 Gain Select INL23
10
PVDDR 15
AVDD 21 OUTL+ 22F 3
Measurement Instrument Audio RL BTL Precision etc.
PWM
HBridge ERROR 6 22F OUTL-
1F 1F
G0 G1
0.1F C4
INR+ 19 Gain Select INR20 G0 G1 G0
150k
Short
Short Protection
RL=Speaker Load Measurement Instrument
OUTR 22F 16
Differential Input
Audio InputR-
PWM
HBridge 13 22F OUTR-
1F RL BTL 1F
Audio Precision etc.
0.1F C3
ERROR G0 18 G1 17 MUTE 7 EAPD 8 BEEP 1 DET_C 2
RL=Speaker Load
Gain Control
G0 G1
Short TSD Control Logic ERROR
G1
150k
UVL
MUTE EAPD BEEP
150k
Bias
OSC
150k
150k
BEEP Detect
0.01F
C8
HActive
REG_SD
REG_S 9
150k
Short Protection REG 3.3V
REG_OUT
11
C7 2.2F
LShutdown
12
REG_GND
5 PGNDL
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=22H, C=1F, the cutoff frequency becomes the following. fc 1 2 LC [Hz]
=33.9[kHz] Use a big current type - Inductor L. (Reference) TDK: SLF12575T-220M4R0
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9/21
2010.06 - Rev.A
BD5471MUV
BEEP Detection Function
Technical Note
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 0.2xVDD DET_C Active Amplifier state Toff Toff calculation fomula Toff= Cx0.8VDD 5u [msec] Standby Active
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
Ton
Toff
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10/21
2010.06 - Rev.A
BD5471MUV
Cntrol Terminal and output
Audio Signal Beep Signal Audio Signal Beep Signal Audio Signal
Technical Note
Audio IN [ Input ]
In case of EAPD=L, it doesn't output. Beep Signal f=300~1760Hz 3.3msec 570usec
EAPD [ Input ]
Equal to or more than
BEEP [ Input ]
It detects that BEEP was inputted.
0.125sec.
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 Amplifier is a standby. The current consumption reduces. Standby Shutdown The current consumption in the audio part is zero.
Speaker output
Input MUTE L L L L L L L L H H H H H H H H EAPD L L L L H H H H L L L L H H H H BEEP L L H H L L H H L L H H L L H H Audio IN No signal signal No signal signal No signal signal No signal signal No signal signal No signal signal No signal signal No signal signal Amplifier state L(Shutdown) L(Shutdown) L(Shutdown) L(Shutdown) L(Shutdown) L(Shutdown) L(Shutdown) L(Shutdown) L(Standby) L(Standby) H(Active) H(Active) H(Active) H(Active) H(Active) H(Active)
Output Speaker output Hiz Hiz Hiz Hiz Hiz Hiz Hiz Hiz Hiz Hiz No signal signal No signal signal No signal signal
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11/21
2010.06 - Rev.A
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=LH)
Technical Note
Output stop (MUTE=H, EAPD=HL)
EAPD 5V/div
OUTL+ 5V/div
OUTL5V/div
Ton=1msec About the short protection
H Bridge
OUTL+ OUTL Short Protection Short Protection 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.
H Bridge
OUTR+ OUTR
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12/21
2010.06 - Rev.A
BD5471MUV
Technical Note
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 3.1W 3.1
measurement conditions : IC unit Rohm standard board mounted board size : 74.2mmx74.2mmx1.6mmt board FR4 1-layer glass epoxy board(Copper on top layer 0%) board FR4 4-layer glass epoxy board(Copper on 2,3 layer 100%) board size : 35mmx25mmx1.6mmt board FR4 4-layer glass epoxy board(Copper on 2,3 layer 100%) connecting with thermal via
Power dissipation Pd(W
2.5 2.2W 2.2 2.0 1.5 1.0 0.7W 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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13/21
2010.06 - Rev.A
BD5471MUV
Typical Characteristics TABLE OF GRAPHS Parameter Efficiency Power dissipation Supply current Supply current Supply current (Iccact) (Istby) (Ireg) Parameter vs Output power vs Output power vs Supply voltage vs Supply voltage vs Supply voltage vs Supply voltage vs Load resistance vs Supply voltage vs Output power Total harmonic distortion plus noise (THD+N) vs Frequency vs Common-mode input voltage Supply voltage rejection ratio (PSRR) vs Frequency vs Frequency vs Frequency
Technical Note
Figure 1, 2 3, 4 5 6 7 8 9, 10 11, 12 13, 14 15, 16, 17, 18, 19, 20, 21,22 23, 24 25, 26, 27, 28 29, 30 31, 32, 33, 34, 35, 36, 37, 38
Shutdown current (Isd) Output power (Po)
Common-mode rejection ratio (CMRR) Gain
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14/21
2010.06 - Rev.A
BD5471MUV
Efficiency - Output power f=1kHz RL=8+33uH LC-filter(22uH+1uF) 100 90 80 70 Efficiency [%] 60 50 40 30 20 10 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Po [W] 1 1.1 1.2 VDD=2.5V VDD=3.6V VDD=5.0V Efficiency [%] 90 80 70 60 50 40 30 20 10 0 0 0.2 0.4 0.6 0.8 1 1.2 Po [W] 1.4
Technical Note
Efficiency vs Output power f=1kHz RL=4+33uH LC-filter(22uH+1uF)
VDD=2.5V VDD=3.6V VDD=5.0V
1.6
1.8
2
Fig.1
Icc vs Output power f=1kHz RL=8+33uH LC-filter(22uH+1uF) 350 300 250 Icc [mA] 200 150 100 50 0 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Po [W] 1 1.1 1.2 VDD=2.5V VDD=3.6V VDD=5.0V Icc [mA] 600 500 400 300 200 100 0 0 0.2 0.4 0.6 0.8
Fig.2
Icc vs Output power f=1kHz RL=4+33uH LC-filter(22uH+1uF)
VDD=2.5V VDD=3.6V VDD=5.0V
1 1.2 Po [W]
1.4
1.6
1.8
2
Fig.3
Icc - VDD No load, No signal 6 5 4 Icc [mA] 3 2 1 0 0 1 2 3 VDD [V] 4 5 6 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2
Fig.4
Iccstby - VDD No load, No signal
Iccstby [mA]
3 VDD [V]
4
5
6
Fig.5
Iccreg - VDD No load, No signal 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 VDD [V] 4 5 6 0.1 0 0 1 2 Isd [uA] 0.3 0.2 0.5 0.4
Fig.6
Iccsd - VDD
Iccreg [mA]
3 VDD [V]
4
5
6
Fig.7
Fig.8
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15/21
2010.06 - Rev.A
BD5471MUV
Output power vs RL THD+N=10% f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz 3.0 2.5 2.0 Po[W] 1.5 1.0 0.5 0.0 4 8 12 16 20 RL[] 24 28 32 0.5 0.0 4 8 12 16 20 RL[] 24 VDD=2.5V VDD=3.6V VDD=5.0V 2.5 2.0 1.5 1.0
Technical Note
4
Output power vs RL THD+N=1% f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
VDD=2.5V VDD=3.6V VDD=5.0V
Po[W]
28
32
Fig.9
Output power vs VDD f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz RL=8THD+N=1% RL=8THD+N=10% 2.0 Po [W] 1.5 1.0 0.5 0.0 4.5 4.7 4.9 VDD [V] 5.1 5.3 5.5 Po [W]
Fig.10
Output power vs VDD f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz RL=4THD+N=1% RL=4THD+N=10%
3.0 2.5
4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 4.5
4.7
4.9
VDD [V]
5.1
5.3
5.5
Fig.11
10 THD+N vs Output power RL=8 f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz 10
Fig.12
THD+N vs Output power RL=4 f=1kHz LC-filter(22uH+1uF) 400Hz-30kHz
VDD=4.5V VDD=5.0V THD+N [%] VDD=5.5V 1 THD+N [%] 1
VDD=4.5V VDD=5.0V VDD=5.5V
0.1 0.01
0.1 Po [W]
1
10
0.1 0.01
0.1
Po [W]
1
10
Fig.13
10 THD+N vs Frequency VDD=5.5V RL=8 LC-filter(22uH+1uF) 30kHz-LPF 10
Fig.14
THD+N vs Frequency VDD=5.5V RL=4 LC-filter(22uH+1uF) 30kHz-LPF Po=50mW Po=250mW Po=1W
THD+N [%]
0.1
THD+N [%] 10k 100k
1
Po=50mW Po=250mW Po=1W
1
0.1
0.01 10 100 1k freq [Hz]
0.01 10 100 1k freq [Hz] 10k 100k
Fig.15
Fig.16
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16/21
2010.06 - Rev.A
BD5471MUV
THD+N vs Frequency VDD=5.0V RL=8 LC-filter(22uH+1uF) 30kHz-LPF THD+N vs Frequency VDD=5.0V RL=4 LC-filter(22uH+1uF) 30kHz-LPF Po=50mW Po=250mW Po=1W
Technical Note
10
10
THD+N [%]
0.1
0.01 10 100 1k freq [Hz] 10k 100k
THD+N [%]
1
Po=50mW Po=250mW Po=1W
1
0.1
0.01 10 100 1k freq [Hz] 10k 100k
Fig.17
10 THD+N vs Frequency VDD=4.5V RL=8 LC-filter(22uH+1uF) 30kHz-LPF 10 Po=50mW Po=250mW Po=500mW THD+N [%] Po=50mW Po=250mW Po=500mW 1
Fig.18
THD+N vs Frequency VDD=4.5V RL=4 LC-filter(22uH+1uF) 30kHz-LPF
1 THD+N [%]
0.1
0.1
0.01 10 100 1k freq [Hz] 10k 100k
0.01 10 100 1k freq [Hz] 10k 100k
Fig.19
10 THD+N vs Frequency RL=8 Po=125mW LC-filter(22uH+1uF) 30kHz-LPF 10 VDD=4.5V VDD=5.0V VDD=5.5V THD+N [%] VDD=4.5V VDD=5.0V VDD=5.5V
Fig.20
THD+N vs Frequency RL=4 Po=250mW LC-filter(22uH+1uF) 30kHz-LPF
1 THD+N [%]
1
0.1
0.1
0.01 10 100 1k freq [Hz] 10k 100k
0.01 10 100 1k freq [Hz] 10k 100k
Fig.21
2.0
THD+N_vs_Common Mode Input Voltage f=1kHz RL=8 Po=100mW LC-filter(22uH+1uF) 400Hz-30kHz
Fig.22
2.0
THD+N_vs_Common Mode Input Voltage f=1kHz RL=4 Po=200mW LC-filter(22uH+1uF) 400Hz-30kHz
1.5 THD+N [%]
VDD=4.5V VDD=5.0V VDD=5.5V
1.5 THD+N [%]
VDD=4.5V VDD=5.0V VDD=5.5V
1.0
1.0
0.5
0.5
0.0 0 1 2 3 4 5 6 7 Vic - Common Mode Input Voltage [V]
0.0 0 1 2 3 4 5 6 7 Vic - Common Mode Input Voltage [V]
Fig.23
Fig.24
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17/21
2010.06 - Rev.A
BD5471MUV
PSRR RL=8 Vripple=0.1Vpp Inputs ac-Grounded Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF 0 -10 -20 PSRR [dB] -30 -40 -50 -60 -70 -80 10 100 1k f [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V PSRR [dB] 0 -10 -20 -30 -40 -50 -60 -70 -80 10 100 1k f [Hz] 10k VDD=4.5V VDD=5.0V VDD=5.5V
Technical Note
PSRR RL=4 Vripple=0.1Vpp Inputs ac-Grounded Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
100k
Fig.25
PSRR RL=8 Vripple=0.1Vpp Inputs Floating LC-filter(22uH+1uF) 30kHz-LPF 0 -10 -20 PSRR [dB] -30 -40 -50 -60 -70 -80 10 100 1k f [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V 0 -10 -20 PSRR [dB] -30 -40 -50 -60 -70 -80 10 100 VDD=4.5V VDD=5.0V VDD=5.5V
Fig.26
PSRR RL=4 Vripple=0.1Vpp Inputs Floating LC-filter(22uH+1uF) 30kHz-LPF
1k f [Hz]
10k
100k
Fig.27
CMRR RL=8 Vin=1Vpp Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF -40 -45 -50 CMRR [dB] -55 -60 -65 -70 10 100 1k freq [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V -40 -45 -50 -55 -60 -65 -70 10 100 VDD=4.5V VDD=5.0V VDD=5.5V
Fig.28
CMRR RL=4 Vin=1Vpp Cin=1uF LC-filter(22uH+1uF) 30kHz-LPF
CMRR [dB]
1k freq [Hz]
10k
100k
Fig.29
Gain vs Frequency RL=8 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF 10 8 6 4 2 0 10 100 1k freq [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V 10 8 6 4 2 0 10 100
Fig.30
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
gain [dB]
gain [dB]
VDD=4.5V VDD=5.0V VDD=5.5V 1k freq [Hz] 10k 100k
Fig.31
Fig.32
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18/21
2010.06 - Rev.A
BD5471MUV
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF 16 14 12 10 8 6 10 100 1k freq [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V 16 14 12 10 8 6 10 100 1k freq [Hz] 10k VDD=4.5V VDD=5.0V VDD=5.5V Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
Technical Note
gain [dB]
gain [dB]
100k
Fig.33
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF 26 24 22 20 gain [dB] 16 14 12 10 8 6 10 100 1k freq [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V gain [dB] 18 26 24 22 20 18 16 14 12 10 8 6 10 100
Fig.34
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
VDD=4.5V VDD=5.0V VDD=5.5V
1k freq [Hz]
10k
100k
Fig.35
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF 30 28 26 24 gain [dB] 20 18 16 14 12 10 10 100 1k freq [Hz] 10k 100k VDD=4.5V VDD=5.0V VDD=5.5V gain [dB] 22 30 28 26 24 22 20 18 16 14 12 10 10 100
Fig.36
Gain_vs_Frequency RL=4 Vin=0.5Vpp LC-filter(22uH+1uF) 30kHz-LPF
VDD=4.5V VDD=5.0V VDD=5.5V
1k freq [Hz]
10k
100k
Fig.37
Fig.38
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19/21
2010.06 - Rev.A
BD5471MUV
Technical Note
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=4, 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
2010.06 - Rev.A
BD5471MUV
Ordering part number
Technical Note
B
D
5
Part No. 5471
4
7
1
M
U
V
-
E
2
Part No.
Package MUV:VQFN024V4040
Packaging and forming specification E2: Embossed tape and reel
VQFN024V4040
4.00.1
4.00.1

Tape Quantity Embossed carrier tape 2500pcs E2
The direction is the 1pin of product is at the upper left when you hold
1.0MAX
1PIN MARK S
+0.03 0.02 -0.02 (0.22)
Direction of feed
( reel on the left hand and you pull out the tape on the right hand
)
0.08 S C0.2
1 24
2.40.1
6
0.40.1
19 18 13
12
0.75
0.5
2.40.1
7
+0.05 0.25 -0.04
1pin
Direction of feed
(Unit : mm)
Reel
Order quantity needs to be multiple of the minimum quantity.
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21/21
2010.06 - 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, fuelcontroller 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.
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http://www.rohm.com/contact/
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