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 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. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/21 2010.06 - 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) ) 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/21 2010.06 - Rev.A 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) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/21 2010.06 - Rev.A 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+ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/21 2010.06 - Rev.A Technical Note BD5471MUV ●Application Circuit Example C5 10μF PVDDL Audio InputL+ 0.1μF Audio InputL- 10 INL+ 24 Gain Select C2 Differential Input 0.1μF AVDD 21 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 AVDD 21 PVDDR 15 10 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 5/21 2010.06 - 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 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=+2.5～5.5V) line. Please connect to Speaker. Please connect to GND line. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/21 2010.06 - Rev.A 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 0.1uF. 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. 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. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/21 2010.06 - Rev.A Technical Note BD5471MUV ●Evaluation board PCB layer Top Layer Bottom Layer www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/21 2010.06 - Rev.A 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/21 2010.06 - 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 10/21 2010.06 - 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 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/21 2010.06 - 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－ Short Protection Short Protection H－ Bridge www.rohm.com © 2010 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 2010.06 - 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. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/21 2010.06 - Rev.A 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/21 2010.06 - 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 1.1 1.2 0 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 www.rohm.com 2 3 VDD [V] 4 5 6 Fig.8 Fig.7 © 2010 ROHM Co., Ltd. All rights reserved. 1 15/21 2010.06 - Rev.A 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 100 1k freq [Hz] 10k 100k Fig.16 16/21 2010.06 - 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 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 www.rohm.com © 2010 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 2010.06 - 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 -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 10 100k 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 100 1k freq [Hz] 10k 100k Fig.32 18/21 2010.06 - 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 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 100 1k freq [Hz] 10k 100k Fig.38 19/21 2010.06 - 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 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 20/21 2010.06 - Rev.A 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) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 21/21 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 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. 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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. 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/ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. R1010A