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.
Input type
Supply voltage(V)
BH7824FVM
Unbalanced input
2.4 ~ 5.5
BH7826FVM
Balanced input
2.6 ~ 5.5
●Absolute
maximum ratings(Ta=25℃)
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
*1
*2
Symbol
V
CC
max.
Pd
Topr
Tstg
Limits
6.0
470(*1)
-30 ~ +85(*2)
-55 ~ +125
Unit
V
mW
℃
℃
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.
500
Power dissipation Pd[mW]
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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© 2010 ROHM Co., Ltd. All rights reserved.
1/10
2010.06 - Rev.A
BH7824FVM,BH7826FVM
●Operating
conditions
Parameter
Supply voltage
(Ta=25℃)
Ratings
BH7824FVM
2.4V ~ 5.5V
BH7826FVM
2.6 ~ 5.5
Technical Note
* Note: This IC is not designed to be radiation-resistant.
●Electrical
characteristics
Parameter
Circuit current 1
Circuit current 2
Voltage gain 1
Voltage gain 2
(Unless otherwise noted Ta=25℃, Vcc=3.6V, f=1kHz, RL=8Ω)
Limits(Typ.)
Symbol
Unit
BA7824FVM
BA7826FVM
I
CC1
I
CC2
G
V1
G
V2
V
OM1
V
OM2
D
STN
V
NO
G
S
V
BIAS
V
SH1
V
SH2
3.5
0
+11.5
0
+6.0
―
0.07
-94
-107
1.8
V
CC
×0.8
~ V
CC
0 ~ 0.5
3.5
0
+11.5
―
+6.0
+5.1
0.2
-94
-107
1.8
2.0 ~ V
CC
0 ~ 0.5
mA
μA
dB
dB
dBV
dBV
%
dBV
dBV
V
V
V
Conditions
No signal , Active mode
No signal, Suspend mode
V
IN
=-20dBV,1st Op-amp gain
2nd Op-amp gain
DSTN=1% ,BTL
*1
V
CC
=3.4V,DSTN=1%,BTL
*1
V
IN
=-20dB,V SE *1
No signal, SE Active mode
*2
V
IN
=-20dB,V BTL
*2
3pin DC voltage
Active mode, Hold voltage
Suspend mode, Hold voltage
Maximum output voltage1
Maximum output voltage2
Output distortion
Output noise level
Suspend attenuation
Bias setting voltage
Suspend hold voltage / H
Suspend hold voltage / L
*1 : B.W.=0.4 ~ 30kHz
*2 : DIN AUDIO
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© 2010 ROHM Co., Ltd. All rights reserved.
2/10
2010.06 - Rev.A
BH7824FVM,BH7826FVM
●Equivalent
circuit
Technical Note
Pin
No.
BH7824FVM
Pin name
Equivalent circuit
Pin name
BH7826FVM
Equivalent circuit
1
SUSPEND CTRL
01
50k
50k
1k
SUSPEND CTRL
01
100k
2
BIAS OUT
30k 487k
30k
02
BIAS OUT
02
100k
3
BIAS IN
30k 57k
30k
03
BIAS IN
30k 150k
30k
03
4
SP IN
1k
04
SP IN
1k
04
5
SP OUT1
05
SP OUT1
05
6
V
CC
-
V
CC
-
7
GND
-
GND
-
8
SP OUT2
08
SP OUT2
08
Note: Numerical values in figures are design values, and do not guarantee ratings.
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© 2010 ROHM Co., Ltd. All rights reserved.
5/10
2010.06 - Rev.A