Class-AB Speaker Amplifiers
1.9W+1.9W
Stereo Speaker Amplifier
BD7836EFV
No.10077EAT07
●Description
BD7836EFV is a Class-AB stereo speaker amplifier, developed for note-book PC, desktop PC, portable devices and others.
Class-AB amplifier has no EMI noise. Power package HTSSOP-B20 can realize high output power.
Low circuit current at active mode reduce consumption of battery. Shutdown current is 0.1µA typically, and pop noise level
when shutdown turns on and off is very small. This device is suitable for the application that often changes mode between
“shutdown state” and “active state”.
●Features
1) High power 1.9W typ. (VDD=5V, R
L
=4Ω, THD+N=1%, stereo input)
High power 1.2W typ. (VDD=5V, R
L
=8Ω, THD+N=1%, stereo input)
2) Gain selectable by the external control (6,10,15.6,21.6dB)
3) Pop noise suppression circuitry
4) Shutdown function (also Mute function) [I
sd
=0.1µA(typ.)]
5) Protection circuitry (Thermal shutdown, Under voltage lockout)
6) Power Package with thermal pad HTSSOP-B20
●Applications
Note-book PC, Desktop PC, etc.
●Absolute
maximum ratings (Ta=+25℃)
Parameter
Power Supply Voltage
Symbol
VDDmax
Ratings
7.0
1
Power Dissipation
Pd
*1
Unit
V
W
W
℃
V
V
3.2
*2
-55
½
+150
-0.3½VDD+0.3
-0.3½VDD+0.3
Storage Temperature
Input Terminal Input Voltage Range
*3
Tstg
Vin
Vctl
Control Terminal Input Voltage Range
*4
*1 70mm×70mm×1.6mm FR4 1-layer glass epoxy board(Copper on top layer 0%)
Derating in done at 8mW/℃ for operating above Ta=25℃. There are thermal via on the board.
*2 70mm×70mm×1.6mm FR4 4-layer glass epoxy board (Copper on bottom 2 and 3 layer 100%)
Derating in done at 25.6mW/℃ for operating above Ta=25℃. There are thermal via on the board.
*3 Input Terminal (LIN+, LIN-, RIN+, RIN-)
*4 Control Terminal (
SHUTDOWN , GAIN0, GAIN1)
●Operating
conditions
Parameter
Power Supply Voltage
Temperature
*
Symbol
VDD
Topr
Range
+4.5
½
+5.5
-40
½
+85
Unit
V
℃
These products aren’t designed for protection against radioactive rays.
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© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.07 - Rev.A
BD7836EFV
●Electric
characteristic (Unless otherwise specified, Ta=+25℃, VDD=+5.0V, R
L
=8Ω, AC stereo input)
Parameter
Circuit current (Active)
Circuit current (Shutdown)
<Speaker amplifier>
Output power 1
Output power 2
P
O1
P
O2
0.7
―
5.5
Gain
G
V
9.5
14.6
20.6
63
Input resistance
R
IN
49
31
17
Supply ripple rejection ratio
Output noise
S/N
Output DC offset voltage
PSRR
Vnoise
S
N
⊿Vo
62
―
―
―
1.2
1.9
6.0
10
15.6
21.6
90
70
45
25
68
16
105
0
―
―
6.5
10.5
16.5
22.6
117
91
59
33
―
80
―
±25
W
W
dB
dB
dB
dB
kΩ
kΩ
kΩ
kΩ
dB
µVrms
dB
mV
Symbol
I
cc
I
sd
Limits
Min.
―
―
Typ.
5
0.1
Max.
10
2.0
Unit
mA
µA
Technical Note
Condition
IC active, No load
SHUTDOWN
=Hi
IC Shutdown
SHUTDOWN
=Lo
RL=8Ω, BTL, f=1kHz, THD+N=1%
*1
RL=4Ω, BTL, f=1kHz, THD+N=1%
*1
BTL, GAIN0=GAIN1=L
BTL, GAIN0=L, GAIN1=H
BTL, GAIN0=H, GAIN1=L
BTL, GAIN0=GAIN1=H
GAIN0=GAIN1=L
GAIN0=L, GAIN1=H
GAIN0=H, GAIN1=L
GAIN0=GAIN1=H
Vripple=0.2Vp-p,C
BYP
=0.47µF
f=1kHz, BTL
BTL, f=1kHz, 20-20kHz
BTL, Po=1W, BTL, f=1kHz, 20-20kHz
<Control terminal (
SHUTDOWN
,GAIN0,GAIN1)>
Control terminal
Input voltage
Hi level
Lo level
VIH
VIL
2.0
0
―
―
VDD
0.8
V
V
*1: B.W.=400
½
30kHz
，
BTL
：
The voltage between 4pin and 8pin, 14pin and 18pin.
●Control
terminal’s settings
SHUTDOWN
Hi
Lo
IC condition
Active
Shutdown
GAIN0
Lo
Lo
Hi
Hi
GAIN1
Lo
Hi
Lo
Hi
Gain
6dB
10dB
15.6dB
21.6dB
Input resistance
90kΩ (TYP.)
70kΩ (TYP.)
45kΩ (TYP.)
25kΩ (TYP.)
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© 2010 ROHM Co., Ltd. All rights reserved.
2/16
2010.07 - Rev.A
BD7836EFV
●Package
outlines
Technical Note
BD7836
Lot No.
(unit : mm)
Fig.1 HTSSOP-B20
●Block
diagram
RIN-
●Pin
assignment table
Pin
Terminal name
No.
ROUT+
Function
Ground
Bit 0 of gain select
Bit 1 of gain select
Left channel positive output
Left channel negative differential input
Supply voltage terminal
Right channel negative differential input
Left channel negative output
Left channel positive differential input
Tap to voltage divider for internal
midsupply bias generator
Ground
No connection
Ground
Right channel negative output
Supply voltage terminal
Supply voltage terminal
Right channel negative differential input
Right channel positive output
Places IC in shutdown mode when
held low
Ground
1
2
GND
GAIN0
GAIN1
LOUT+
LIN-
PVDD
RIN+
LOUT-
LIN+
BYPASS
GND
NC
GND
ROUT-
PVDD
VDD
RIN-
ROUT+
RIN+
3
4
ROUT-
5
6
GAIN0
GAIN1
Gain
Control
Depop
Circuitry
Power
Management
PVDD
VDD
BYPASS
SHUTDOWN
GND
7
8
9
10
LIN-
LOUT+
11
12
LIN+
13
14
LOUT-
15
16
17
Fig.2
18
19
20
SHUTDOWN
GND
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© 2010 ROHM Co., Ltd. All rights reserved.
3/16
2010.07 - Rev.A
Industrial Control Electronics
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