Class-AB Speaker Amplifiers 1.1W to1.5W Monaural Speaker Amplifiers BH7824FVM,BH7826FVM No.11090EBT01 ●Description The BH7824FVM and BH7826FVM are speaker amplifier ICs for low-voltage drives and low power consumption audio, specialized for mobile telephones and other mobile audio devices. ●Features 1) BTL monaural speaker amplifier 2) Capable of high power 500mW/8Ω/BTL output 3) Wide power supply voltage range 4) Supports active/shutdown modes 5) Built-in anti-pop circuit 6) Built-in thermal shutdown circuit ●Applications Mobile telephones, PDAs, notebook computers, DSC, DVC, and other mobile audio devices. ●Product lineup Part No. BH7824FVM BH7826FVM Input type Unbalanced input Balanced input 2.4 ~ 5.5 2.6 ~ 5.5 Supply voltage(V) ●Absolute maximum ratings(Ta=25℃) Parameter Symbol Limits Unit VCCmax. 6.0 V Pd 470(*1) mW Operating temperature Topr -30 ~ +85(*2) ℃ Storage temperature Tstg -55 ~ +125 ℃ Supply voltage Power dissipation *1 *2 Reduced by 4.7 mW/C at 25C or higher, when mounted on a 70mm×70mm×1.6mm PCB board. Topr=70℃ ~ 85℃ is the range for performing basic operations and does not guarantee characteristics or rated output. Moreover, TSD (Thermal Shutdown) may become operable if input signals occurring in this range are excessive. Power dissipation Pd[mW] 500 400 300 200 100 0 0 50 100 150 Temperature Ta[℃] Fig.1 Ta-Pd (when mounted on a PCB board) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Operating conditions (Ta=25℃) Ratings Parameter Supply voltage BH7824FVM BH7826FVM 2.4V ~ 5.5V 2.6 ~ 5.5 * Note: This IC is not designed to be radiation-resistant. ●Electrical characteristics Parameter (Unless otherwise noted Ta=25℃, Vcc=3.6V, f=1kHz, RL=8Ω) Limits(Typ.) Symbol Unit BA7824FVM BA7826FVM Conditions Circuit current 1 ICC1 3.5 3.5 mA No signal , Active mode Circuit current 2 ICC2 0 0 μA No signal, Suspend mode Voltage gain 1 GV1 +11.5 +11.5 dB VIN=-20dBV,1st Op-amp gain Voltage gain 2 GV2 0 ― dB 2nd Op-amp gain Maximum output voltage1 VOM1 +6.0 +6.0 dBV DSTN=1% ,BTL *1 Maximum output voltage2 VOM2 ― +5.1 dBV VCC=3.4V,DSTN=1%,BTL *1 Output distortion DSTN 0.07 0.2 % Output noise level VNO -94 -94 dBV No signal, SE Active mode *2 Suspend attenuation GS -107 -107 dBV VIN=-20dB,V BTL *2 Bias setting voltage VBIAS 1.8 1.8 V 3pin DC voltage Suspend hold voltage / H VSH1 VCC×0.8 ~ VCC 2.0 ~ VCC V Active mode, Hold voltage Suspend hold voltage / L VSH2 0 ~ 0.5 0 ~ 0.5 V Suspend mode, Hold voltage VIN=-20dB,V SE *1 *1 : B.W.=0.4 ~ 30kHz *2 : DIN AUDIO www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 2/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Measurement circuit 0.1μ 0.1μ 1 A/S 8 2 7 3 1.0μ V 8 6 BIAS 5 4 V 22k 600 100k 0.1μ 100μ Fig.2 BH7824FVM 100k VIN 2 0.1μ 22k 600 1 8 2 A/S 7 3 VI N1 0.1μ 6 BI AS 1μ 22k 600 100μ 8 V 0.1μ VCC 4 5 V 100k Fig.3 BH7826FVM www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 3/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Block diagram SUSPEND CTRL 1 A/S 8 SP OUT 2 7 GND BIAS OUT 2 BIAS IN 3 SP IN BIAS 4 6 VCC 5 SP OUT 1 Fig.4 BH7824FVM 8 SP OUT 2 SP IN 2 1 7 GND SUSPEND CTRL 2 A/S BIAS 3 6 VCC BIAS SP IN 1 4 5 SP OUT 1 Fig.5 BH7826FVM www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 4/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Equivalent circuit BH7824FVM Pin No. 1 Pin name SUSPEND CTRL BH7826FVM Equivalent circuit Pin name Equivalent circuit 1k 50k 01 50k 01 SP IN2 100k 2 BIAS OUT 30k 487k 30k 3 BIAS IN 30k 57k 30k 02 SUSPEND CTRL 03 BIAS IN 04 SP IN1 05 SP OUT1 02 100k 30k 150k 4 SP IN 5 SP OUT1 6 VCC － VCC － 7 GND － GND － 8 SP OUT2 1k 03 30k SP OUT2 08 1k 04 05 08 Note: Numerical values in figures are design values, and do not guarantee ratings. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 5/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Application circuit BH7824FVM SUSPEND 01 A/S 08 02 07 SPEAKER 03 SP_IN(L+R) 06 BIAS 04 05 R1 R2 Cf Fig.6 BH7826FVM Cf R2 SP_IN 2 0.1μ R1 SUSPEND 01 08 02 07 1μ 1μ 03 SPEAKER 06 BIAS SP_IN 1 0.1μ 04 05 R1 R2 Cf Fig.7 www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 6/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Functions and Settings of external components 【Function of external components】 ①R1 R1 is an input resistor of inverting amplifier which determines closed loop gain with R2. ②R2 R2 is a feedback resistor of inverting amplifier determine closed loop gain with R2. The gain is set by below expression. Gain = 20log R2 R1 [dB] ③Cf Cf is feedback capacitor to cut high frequency signals. It forms a low-pass filter with R2. The cut-off frequency is calculated as below. fcL = [Hz] 1 2π×R2×Cf (注) R1,R2,Cf and fcL has limits in below table. Please set these component values in the ranges. Ranges Rin 10kΩ ≦ R1 ≦120kΩ Rf 47kΩ ≦ R2 ≦120kΩ Cf Gain＞+6dB Cf≦560pF 0＜Gain≦+6dB fcL Cf≦270pF ≧ 4kHz fcL ④Cb1 (Cb2 is only BH7824FVM.) The capacitors stabilize DC bias voltage. BH7824FVM BH7826FVM Cb1 1µF 1µF Cb2 0.1µF ― As Cb1 (or Cb2) becomes larger, power supply rejection ratio is improved but turn on time becomes longer. As it becomes smaller, turn on time becomes shorter but power supply rejection ratio and cross talk become worse. ⑤Cin It is Input coupling capacitor. The value of the input capacitor directly affects the low frequency performance of the circuit. The corner frequency of the high pass filter is determined in equation at ③ of next section. 【Configuration of external components 】 ① Gain Gain is designed by output power application ask for. Output power is determined to below. 2 Po[W] = Vo [Vrms] / RL[Ω] Vo = Gv・Vin Gv ≧ Po・RL / Vin ② Values of R1 and R2 R1 and R2 are determined to Av. Av = ( R2 / R1 )×2 Input impedance (R1) must be probable driven by signal source ③ Input coupling capacitor Corner frequency of HPF is determined in below. fc[Hz] = 1 / (2π・R1・Cin) Input coupling is solved by equation of fc. Cin ≧ 1 / (2π・R1・fc) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 7/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM 【instruction for use carefully】 ①Do not connect capacitive load has more than below capacitance between OUT1,2(5,8pin) and GND otherwise oscillation may occured. 8, 12ΩSpeakers 16Ωspeaker BH7824FVM / 26FVM BH7824FVM Co ≦ 100pF Co ≦ 47pF Co Co 07 Co 06 Fig.8 Output connections ②Do not use this IC without a load. ③This IC is compatible with dynamic speaker loads (8～40Ω：BH7824FVM、8～12Ω：BH7826FVM) and is not compatible with loads other than these mentioned. ④soft mute setting becomes effective on connecting a resistor and capacitor to the SUSPEND pin (1pin: BH7824FVM, 2pin: BH7826FVM). VCC R 1 C Recommendation value R：100kΩ C：0.47µF Fig.9 BH7824FVM application circuit for soft mute ⑤Place the Vcc decoupling capacitor between VCC(6pin) and GND(7pin) as close to IC as possible. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 8/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Typical characteristics(BH7824FVM) 2 Ta=Room temperature RL=8Ω SUSPEND=VCC 8 CIRCUIT CURRENT：ICCS[uA] CIRCUIT CURRENT：ICCA[mA] 10 6 4 2 0 1.5 Ta=Room temperature RL=8Ω SUSPEND=0V 1 0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 1.5 SUPPLY VOLTAGE：VCC [V] Fig.11 Circuit current (ACTIVE) － Power supply 2.5 3 3.5 4 4.5 SUPPLY VOLTAGE：VCC[V] 5 5.5 Fig.12 Circuit current (SUSPEND) － Power supply 1200 700 Ta=Room temperature f=1kHz THD+N=1.0% 400～30kBPF AV=8 800 600 POWER DISSIPATION：PD [mW] 1000 OUTPUT POWER：Po[mW] 2 RL=12Ω RL=8Ω 600 400 RL=16Ω 200 RL=8Ω 500 400 300 Ta=Room temperature VCC=5.0V f=1kHz 400～30kBPF THD+N≤1.0% RL=16Ω 200 100 0 0 1.5 2 2.5 3 3.5 4 4.5 SUPPLY VOLTAGE：VCC[V] 5 0 5.5 200 400 600 800 1000 1200 OUTPUT POWER：Po[mW] Fig.13 Output power － Power supply Fig.14 Power dissipation － Outpu power 350 POWER DISSIPATION：PD [mW] 300 250 RL=8Ω 200 Ta=Room temperature VCC=3.6V f=1kHz 400～30kBPF THD+N≤1.0% 150 RL=16Ω 100 50 0 0 100 200 300 400 500 600 OUTPUT POWER：Po[mW] Fig.15 Power dissipation － Outpu power www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 9/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM Ta=Room temperature VCC=3.6V f=1kHz RL=8Ω 400～30kBPF THD+N≤1.0% AV=8 100 OUTPUT POWER：Po[mW] OUTPUT POWER：Po[mW] 1000 Ta=Room temperature VCC=3.6V f=1kHz RL=8Ω 400～30kBPF THD+N≤1.0% AV=2 1000 10 100 10 1 1 -40 -35 -30 -25 -20 -15 -25 -10 -20 -5 0 5 Fig.17 Output Power － Input level Fig.16 Output Power － Input level 10.00 Ta=Room temperature VCC=5.0V RL=8Ω f=1kHz AV=8 400～30kBPF 1.00 Ta=Room temperature VCC=5.0V RL=8Ω f=1kHz AV=2 400～30kBPF THD+N[%] THD+N[%] 1.00 -10 INPUT LEVEL：Vin[dBV] INPUT LEVEL：Vin[dBV] 10.00 -15 0.10 0.01 0.10 1m 0.001 100m 0.1 10m 0.01 11 0.01 10 10 1m 0.001 10m 0.01 OUTPUT POWER：Po[W] 100m 0.1 11 10 10 OUTPUT POWER：Po[W] Fig.18 THD + Noise － Output Power Fig.19 10.00 Ta=Room Fi 率 － 出力電力特性 temperature VCC=3.6V RL=8Ω f=1kHz AV=8 1.00 400～30kBPF 10.00 Ta=Room temperature VCC=3.6V RL=8Ω f=1kHz AV=2 400～30kBPF THD+N[%] THD+N[%] 1.00 THD + Noise － Output Power 0.10 0.10 0.01 0.01 0.001 1m Fig.20 0.01 10m 0.1 100m 1 1 1010 OUTPUT POWER：Po[W] THD + Noise － Output Power www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 1m 0.001 10m 0.01 100m 0.1 11 10 10 OUTPUT POWER：Po[W] Fig.21 10/14 THD + Noise － Output Power 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM Ta=Room temperature VCC=5.0V RL=8Ω Po=300mW AV=8 WIDE BAND 1 THD+N[%] THD+N[%] 1 0.1 0.01 Ta=Room temperature VCC=5.0V RL=8Ω Po=300mW AV=2 WIDE BAND 0.1 0.01 10 100 100 1000 1k 10000 10k 10 100000 100k 100 FREQUENCY：f[Hz] Fig.23 Ta=Room temperature VCC=3.6V RL=8Ω Po=150mW AV=8 WIDE BAND THD + N － Frequency Ta=Room temperature VCC=3.6V RL=8Ω Po=150mW AV=2 WIDE BAND 1 THD+N[%] THD+N[%] 1 0.1 0.1 0.01 10 10 100 100 1000 1k 10000 10k 10 10 100000 100k 100 100 FREQUENCY：f[Hz] Fig.24 THD + N － Frequency Fig.25 VOLTAGE GAIN：GV2[dB] 11.5 11.0 11 2 5 10 10 SUPPLY VOLTAGE：VCC[V] Fig.26 Gain(1stAmp) － Power supply www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 10000 10k 100000 100k THD + N － Frequency Ta=Room temperature RL=8Ω f=1kHz Vin=-23dBV AV=8 0.6 Ta=Room temperature RL=8Ω f=1kHz Vin=-23dBV AV=8 12.0 1000 1k FREQUENCY：f[Hz] 12.5 VOLTAGE GAIN：GV1[dB] 100k 100000 10 10 10.5 10k 10000 FREQUENCY：f[Hz] Fig.22 THD + N － Frequency 0.01 1k 1000 0.2 -0.2 2ndAMP Gain -0.6 -1.0 11 2 5 SUPPLY VOLTAGE：VCC[V] 10 10 Fig.27 Gain(2ndAmp) － Power supply 11/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ※C1:The capacitor connected to SUSPEND terminal ※C1:The capacitor connected to SUSPEND terminal 125 Ta=Room temperature VCC=3.6V RL=8Ω 100 SHUT OUT TIME：Toff[msec] WAKE UP TIME：Ton[msec] 125 C1=1.0μF 75 50 C1=0.47μF 25 C1=0.22μF Ta=Room temperature VCC=3.6V RL=8Ω 100 C1=1.0μF 75 50 C1=0.47μF 25 C1=0.22μF 0 0 0 25 50 75 100 125 150 0 175 SUSPEND RESISTANCE：R1[kΩ] Fig.29 Ta=Room temperature Vcc=3.6V RL=8Ω Vripple=100mVpp BTL RIN=600Ω -20 -30 AV=8 -40 75 100 125 150 175 AV=2 -50 -60 Shut out time － SUSPEND terminal resistance Ta=Room temperature Vcc=3.6V RL=8Ω Vripple=300mVpp BTL RIN=600Ω 0 POWER SUPPLY REJECTION RATIO： PSRR[dB] POWER SUPPLY REJECTION RATIO： PSRR[dB] -10 50 SUSPEND RESISTANCE：R1[kΩ] Fig.28 Wake up time － SUSPEND terminal resistance 0 25 -10 -20 AV=8 -30 -40 AV=2 -50 -60 -70 10 10 100 100 1000 1k 10000 10k 100000 100k FREQUENCY：f[Hz] www.rohm.com 100 100 1000 1k 10000 10k 100000 100k FREQUENCY:f[Hz] Fig.30 Power Supply Rejection Ratio － Frequency © 2011 ROHM Co., Ltd. All rights reserved. 10 10 Fig.31 Power Supply Rejection Ratio － Frequency 12/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Notes for use 1) Numbers and data in entries are representative design values and are not guaranteed values of the items. 2) Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure to verify circuit characteristics for your particular application. Modification of constants for other externally connected circuits may cause variations in both static and transient characteristics for external components as well as this Rohm IC. Allow for sufficient margins when determining circuit constants. 3) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range (Topr), may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. A physical safety measure, such as a fuse, should be implemented when using the IC at times where the absolute maximum ratings may be exceeded. 4) GND potential Ensure a minimum GND pin potential in all operating conditions. Make sure that no pins are at a voltage below the GND at any time, regardless of whether it is a transient signal or not. 5) Thermal design Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation (Pd) in actual states of use. 6) Short circuit between terminals and erroneous mounting Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other components on the circuits, can damage the IC. 7) Operation in strong electromagnetic field Using the ICs in a strong electromagnetic field can cause operation malfunction. www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 13/14 2011.08 - Rev.B Technical Note BH7824FVM,BH7826FVM ●Ordering part number B H 7 Part No. 8 2 4 Part No. 7824 7826 F V M - Package FVM: MSOP8 T R Packaging and forming specification TR: Embossed tape and reel MSOP8 <Tape and Reel information> 2.8±0.1 4.0±0.2 8 7 6 5 0.6±0.2 +6° 4° −4° 0.29±0.15 2.9±0.1 (MAX 3.25 include BURR) Tape Embossed carrier tape Quantity 3000pcs Direction of feed TR The direction is the 1pin of product is at the upper right when you hold ( reel on the left hand and you pull out the tape on the right hand ) 1 2 3 4 1PIN MARK 1pin +0.05 0.145 −0.03 0.475 0.08±0.05 0.75±0.05 0.9MAX S +0.05 0.22 −0.04 0.08 S Direction of feed 0.65 Reel (Unit : mm) www.rohm.com © 2011 ROHM Co., Ltd. All rights reserved. 14/14 ∗ Order quantity needs to be multiple of the minimum quantity. 2011.08 - Rev.B 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. 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 © 2011 ROHM Co., Ltd. All rights reserved. R1120A