Rohm BH7824FVM-TR 1.1w to1.5w monaural speaker amplifier Datasheet

Class-AB Speaker Amplifiers
1.1W to1.5W
Monaural Speaker Amplifiers
BH7824FVM,BH7826FVM
No.10077EAT04
●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
Supply voltage
Limits
Unit
VCCmax.
6.0
V
Pd
470(*1)
mW
Operating temperature
Topr
-30 ~ +85(*2)
℃
Storage temperature
Tstg
-55 ~ +125
℃
Power dissipation
*1
*2
Reduced by 4.7 mW/C at 25C 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)
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1/10
2010.06 - Rev.A
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
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2/10
2010.06 - Rev.A
Technical Note
BH7824FVM,BH7826FVM
●Measurement circuit
0.1μ
0.1μ
1.0μ
1 A/S
8
2
7
3
8
6
BIAS
4
600
V
5
V
22k
100k
0.1μ
100μ
Fig.2 BH7824FVM
100k
VIN2 0.1μ 22k
600
1
8
2 A/S
7
3
VIN1
0.1μ
6
BIAS
1μ
22k
600
100μ
8
V
0.1μ
VCC
4
5
V
100k
Fig.3 BH7826FVM
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3/10
2010.06 - Rev.A
Technical Note
BH7824FVM,BH7826FVM
●Block diagram
SUSPEND CTRL 1
8 SP OUT 2
A/S
BIAS OUT 2
BIAS IN
3
SP IN
4
7 GND
BIAS
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
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4/10
2010.06 - Rev.A
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
SUSPEND CTRL
100k
2
BIAS OUT
30k 487k
30k
3
BIAS IN
30k 57k
30k
02
BIAS OUT
03
BIAS IN
04
SP IN
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.
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5/10
2010.06 - Rev.A
Technical Note
BH7824FVM,BH7826FVM
●Application circuit
BH7824FVM
Co
SUSPEND
01 A/S
08
02
07
SPEAKER
03
06
BIAS
04
SP_IN(L+R)
05
R1
Co
R2
Cf
Fig.6
BH7826FVM
Cf
R2
SP_IN
0.1μ R1
SUSPEN
01
08
02
07
1μ
1μ
03
SP_IN
SPEAKER
06
BIAS
0.1μ
04
05
R1
R2
Cf
Fig.7
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6/10
2010.06 - Rev.A
Technical Note
BH7824FVM,BH7826FVM
●Cautions for use
1) Set within the ranges below.
Parameter
8, 12Ωspeaker
16Ωspeaker
BH7824FVM/26FVM
BH7824FVM
R1
10kΩ ≦ R1 ≦120kΩ
←
R2
47kΩ ≦ R1 ≦120kΩ
←
Cf
Cf≦560pF (G>+6dB)
Cf≦270pF(0<G≦+6dB)
←
Co
Co ≦ 100pF
fcutoff
Co ≦ 47pF
fcutoff ≦ 4kHz
fcutoff = 1/(2πR2Cf ) [Hz]
←
2) Do not use this IC without a load.
3) Do not connect a capacitive load greater than 100 pF between an output pin (pin 5 or 8) and GND.
Because of the multiple feedback configurations, if a large capacitive load were connected, the amplifier might oscillate.
4) This IC is compatible with dynamic speaker loads (8/12/16Ω: BH7824FVM, 8/12Ω: BH7826FVM) and is not compatible
with loads other than these mentioned.
5) A soft mute setting becomes effective on connecting a resistor and capacitor to the SUSPEND pin (1pin: BH7824FVM,
2pin: BH7826FVM).
VCC
R
1
Recommend
R:100kΩ
C:0.47μF
C
Fig.8 BH7824FVM Soft mute
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7/10
2010.06 - Rev.A
Technical Note
BH7824FVM,BH7826FVM
●Reference data
10
8
6
4
2
4
3.5
VOLTAGE GAIN : Gv[dB]
12
0
3
2.5
2
1.5
1
4
4.4 4.8 5.2 5.6
SUPPLY VOLTAGE : VCC[V]
11
10
9
8
2.4 2.8 3.2 3.6
4
4.4 4.8 5.2 5.6
SUPPLY VOLTAGE : VCC[V]
Fig.10 Circuit current (SUSPEND)
vs Supply voltage
Fig.9 Circuit current (ACTIVE)
vs Supply voltage
12
0.5
0
2.4 2.8 3.2 3.6
TOTAL HARMONIC DISTORTION : THD[%]
13
4.5
CIRCUIT CURRENT : ICCS[uA]
CIRCUIT CURRENT : ICCA[mA]
14
2.4 2.8 3.2 3.6
4
4.4 4.8 5.2 5.6
SUPPLY VOLTAGE : VCC[V]
Fig.11 Voltage gain
vs Supply voltage
1
0.1
0.01
0
2
4
6
8
SUPPLY VOLTAGE : VCC[V]
Fig.12 Total harmonic distortion
vs Supply voltage
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8/10
2010.06 - Rev.A
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.
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9/10
2010.06 - Rev.A
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)
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10/10
∗ 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. 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
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shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
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R1010A
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