SANYO LV4991M

Ordering number : ENA1492
Bi-CMOS IC
LV4991M
For Portable Audio Equipment
Monaural BTL Power Amplifier
Overview
LV4991M incorporates the power amplifier circuit operable at low voltage (2.7V or more) and has additionally the standby
function to reduce the current drain. This is the best IC for speaker drive for the audio of low-power range system and home
appliance. There are The LV4991TT: MSOP8 (150mil) and The LV4991TH: HMSOP8 (150mil) in the package change
goods.
Function and Feature
• Monaural BTL power amplifier incorporated
Standard output power 1 = 450mW (VCC = 3.6V, RL = 8Ω, THD = 10%)
Standard output power 2 = 1000mW (VCC = 5V, RL = 8Ω, THD = 10%)
Output coupling capacitor not necessary because of differential output type
• Operation at low voltage possible
VCC = 2.7V or more
• Standby function incorporated
Standard current drain at standby = 0.1µA (VCC = 3.6V)
• Second amplifier stop control function incorporated : Reducing the pop sound at startup, simple MUTE
• Overheat protection circuit incorporated
• Gain setting possible
BTL voltage gain = 0 to 26dB
• Output phase compensation capacitor not necessary
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
61009 MS 20090522-S00005 No.A1492-1/11
LV4991M
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
VCC max
Allowable power dissipation
Pd max
Operating temperature
Storage temperature
Conditions
Ratings
Unit
6
Mounted on a specified board.*
V
900
mV
Topr
-40 to +85
°C
Tstg
-40 to +150
°C
* Specified board: 40mm × 50mm × 1.6mm, glass epoxy (both side) board
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
VCC
Recommended load resistance
RL
Allowable operating supply
voltage range
VCC op
Conditions
Ratings
Unit
3.6
V
8 to 32
Ω
2.7 to 5.5
V
* Determine the supply voltage to be used with due consideration of allowable power dissipation.
Electrical Characteristics Ta = 25°C, VCC = 3.6V, fin = 1kHz, RL = 8Ω
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
Quiescent current drain
ICCOP
No signal, RL = ∞
3.6
6
mA
Stand-by current drain
ISTBY
No signal, RL = ∞, V2 = LOW
0.1
10
µA
Maximum output power
POMX1
THD = 10%
300
450
POMX2
THD = 10%, VCC = 5V
665
1000
Voltage gain
VG
VIN = -30dBV
4.5
6
Voltage gain use range
VGR
Total harmonic distortion ratio
THD
VIN = -30dBV
0.3
1
Output noise voltage
VNOUT
Rg = 620Ω, 20 to 20kHz
120
280
Ripple removal ratio
SVRR
Rg = 620Ω, fr = 100Hz, Vr = -20dBV
Output offset voltage
VOS
Rg = 620Ω
Reference (pin 3) voltage
VREF
Pin 2 control HIGH voltage
VSTBH
Power amplifier operation mode
Pin 2 control LOW voltage
VSTBL
Power amplifier standby mode
Pin 4 control HIGH voltage
VCNTH
Second power amplifier operation mode
Pin 4 control LOW voltage
VCNTL
Second power amplifier standby mode
0
mW
mW
7.5
dB
26
dB
48
-50
dB
50
1.81
1.9
%
µVrms
mV
V
VCC
V
0
0.3
V
1.6
VCC
V
0
0.3
V
No.A1492-2/11
LV4991M
Package Dimensions
unit : mm (typ)
3032D
Pd max -- Ta
5.0
5
0.63
4.4
6.4
8
1.27
0.15
0.35
(1.5)
(0.65)
4
1.7max
1
Allowable power dissipation, Pd max -- mW
1200
1000
900
Specified board: 40×50×1.6mm3
glass epoxy board
Specified board
(Both side)
800
600
468
400
300
Independent IC
200
0
-40
156
-20
0
20
40
60
8085
100
0.1
Ambient temperature, Ta -- °C
SANYO : MFP8(225mil)
Recommended Board
Both sided board
Size : 40mm×50mm×1.6mm
Top Layer
Bottom Layer
No.A1492-3/11
LV4991M
Block Diagram and Sample Application Circuit
C2
0.1µF
R2
22kΩ
C3
R1
0.33µF 22kΩ
from CPU
IN
AMP1
VCC
R3
10kΩ STBY
2
BIAS
8
VCC
TSD
7
GND
VREF
3
C4
1µF
from CPU
+
1
CNT
4
R4
10kΩ
6
CONTROL
+
5
AMP2
V
+ C1 CC
2.2µF
OUT1
VCC
GND
OUT2
Test Circuit
0.1µF
22kΩ
0.33µF
VIN
+
VCC
2.2µF
22kΩ
620Ω
1
8
2
7
10kΩ
VSTBY
LV4991M
8Ω
3
6
4
5
1µF
10kΩ
No.A1492-4/11
LV4991M
Pin Description
Pin voltage
Pin No.
1
Symbol
IN
Description
VCC = 3.6V
1.81
Equivalent circuit
Input pin
VCC
1
3kΩ
2
STBY
+
Standby pin
VCC
•Standby mode at 0 to 0.3V
•Operation mode at 1.9 to VCC
21kΩ
3
VREF
1.81
40.7kΩ
121.4kΩ
2
GND
Ripple filter pin
VCC
100kΩ
(For connection of capacitor for filter)
VCC
450kΩ
101kΩ
3
GND
4
CNT
Second amplifier stop control pin
VCC
•Second amplifier stopped at 0 to
20µA
0.3V
11kΩ
100kΩ
4
5
OUT2
8
OUT1
1.81
Power amplifier output pin
GND
VCC
5
+
8
10kΩ
6
GND
Ground pin
7
VCC
Power pin
No.A1492-5/11
LV4991M
Cautions for use
1. Input coupling capacitor (C3)
The input coupling capacitor C3 and input resistor R1 make up the high-pass filter, attenuating the bass frequency.
Therefore, the capacitance value must be selected with due consideration of the pass band. Note with care that this
capacitance value affects the pop sound at startup.
Namely, the increased capacitance value will make the pop sound louder.
2. Pin 3 capacitor (C4)
This capacitor C4 is designed to reduce the power ripple. The ripple removal ratio increases when the capacitance is
larger. Note however that this capacitor affects the pop sound at startup.
Design must therefore be made by taking into both features as above described.
3. Pin 4 control (second amplifier stop control function)
Pin 4 is a pin to turn ON/OFF the operation of second amplifier. By using this function, the pop sound at startup can be
reduced. Note that pin 4 can be controlled by applying the voltage described below :
Second amplifier ON ⇒ V4 = 1.6 to VCCV or OPEN
Second amplifier OFF ⇒ V4 = 0 to 0.3V
When the pin-3 capacitor C4 is downsized, the pop sound becomes louder. The pop sound can be reduced by providing
the time Tmu to stop the second amplifier (see Fig. 1) while utilizing this function of the microcomputor. The
recommended mute time Tmu is as follows.
Pin 2:STBY
Pin 4:CNT
C4 [µF]
0.1
0.22
0.33
Tmu [ms]
≥ 170
≥ 270
≥ 280
Between pins 8 and 5:
OUT1-OUT2
AMP2:ON
Tmu
time
Fig. 1
4. Standby pin (pin 2)
By controlling the standby pin, the mode changeover can be made between standby and operation modes.
Standby mode ⇒ V2 = 0 to 0.3V
Operation mode ⇒ V2 = 1.9 to VCCV
When using the standby pin as interlocked with power supply as shown in Fig. 2, care should be taken because the
current ISTBY as expressed by the following equation flows through the standby pin.
VCC
VCC−1.4V
ISTBY =
R3+21kΩ
VCC
R3
STBY
7
2
Fig. 2
No.A1492-6/11
LV4991M
5. Bypass capacitor (C2) of the power supply block
The bypass capacitor attached to the power pin (pin 7) must be arranged as near to this pin as possible.
6. Short-circuit between pins
When power is applied with pins left short-circuited, deterioration or damage may result.
Therefore, check before power application if pins are short-circuited with solder, etc. during mounting of IC to the
substrate.
7. Short-circuit of load
If the load is left short-circuited for a long period of time, deterioration or damage may occur.
Never allow the load to short-circuit.
8. Maximum rating
When IC is used near the maximum rating, there is a possibility that the maximum rating may be exceeded even under
the smallest change of conditions, resulting in failure. Take the sufficient margin for variation of supply voltage and
use IC within a range where the maximum rating will never be exceeded.
No.A1492-7/11
LV4991M
3
2
0.1
10
7
5
3
2
3
2
2
3
5
7
2
100
3
5
7 1000
10
2
3
3
2
1
7
5
3
2
10
2
3
5
7
2
100
3
5
%
=
D
1000
HD
800
7
1%
T
600
400
0
1.5
1000
2.5
3.5
4.5
6.5
5.5
%
%
HD
=
1%
T
400
200
D
TH
Output power, PO -- mW
TH
D
=
10
600
PO -- VCC
fin = 1kHz
VG = 6dB
RL = 32Ω
10
700
=
PO -- VCC
fin = 1kHz
VG = 6dB
RL = 16Ω
600
500
D
=
1%
TH
400
300
200
100
0
1.5
2.5
3.5
4.5
5.5
0
1.5
6.5
2.5
3.5
Supply voltage, VCC -- V
Pd -- PO
RL = 8Ω
VG = 6dB
fin = 1kHz
400
VCC = 5.0V
350
500
400
VCC = 3.6V
300
VCC = 3.0V
200
100
0
10
4.5
6.5
5.5
Supply voltage, VCC -- V
Power dissipation, Pd -- mW
600
=
Supply voltage, VCC -- V
800
700
7 1000
PO -- VCC
fin = 1kHz
VG = 6dB
RL = 8Ω
Output power, PO -- mW
1000
5
200
0.1
1200
100
10
1400
1200
10
7
5
7
TH
THD -- PO
RL = 32Ω
VG = 6dB
fin = 1kHz
200<BW<80kHz
Output power, PO -- mW
3
2
5
Output power, PO -- mW
VCC = 5V
100
7
5
VCC =
3V
VCC =
3.6V
Total harmonic distortion, THD -- %
Output power, PO -- mW
Output power, PO -- mW
3
1
7
5
0.1
10
Power dissipation, Pd -- mW
2
VCC = 5V
3
2
THD -- PO
RL = 16Ω
VG = 6dB
fin = 1kHz
200<BW<80kHz
VCC =
3.6V
1
7
5
100
7
5
VCC =
3V
3
2
Total harmonic distortion, THD -- %
10
7
5
VCC = 5V
3
2
RL = 8Ω
VG = 6dB
fin = 1kHz
200<BW<80kHz
VCC =
3.6V
100
7
5
VCC =
3V
Total harmonic distortion, THD -- %
General Characteristics
THD -- PO
Pd -- PO
RL = 16Ω
VG = 6dB
fin = 1kHz
VCC = 5.0V
300
250
200
VCC = 3.6V
150
VCC = 3.0V
100
50
2
3
5
7
100
2
Output power, PO -- mW
3
5
7
1000
0
10
2
3
5
7
100
2
3
5
7 1000
Output power, PO -- mW
No.A1492-8/11
LV4991M
PO -- RL
7
Voltage gain, VG -- dB
Output power, PO -- mW
500
400
300
200
THD = 10%
100
20
30
40
50
60
µF
=1
4
3
VCC = 3.6V
RL = 8Ω
VIN = -30dBV
Rin = 22kΩ
2 3
5 7 100
ICCO -- VSTBY
2 3
5 7 10k
2 3
5 7100k
ICCO -- VCNT
4
Supply current, ICCO -- mA
3
2.5
2
1.5
1
0.5
VCC = 3.6V
VG = 6dB
RL = 8Ω
ñ 0.5
0
1
2
3
3.6
3.4
3.2
3
2.8
2.6
2.4
VCC = 3.6V
VG = 6dB
RL = 8Ω
2.2
2
0
4
1
2pin voltage, VSTBY -- V
Supply voltage ripple rejection, SVRR -- dB
60
5
4
3
2
1
RL = ∞
0
0
1
2
3
4
5
55
50
SVRR -- f
45
40
35
30
10
6
2
3
5 7 100
0
ñ 10
Mute attenation, VMUTE -- dB
120
100
80
60
VCC = 3.6V
Rg = 620Ω
RL = 8Ω
VG = 6dB
20Hz<BW<20kHz
20
0
2.5
3
3.5
4
4.5
Supply voltage, VCC -- V
2
3
5 7 1k
2
3
5 7 10k
Frequency, f -- Hz
VNO -- VCC
40
4
3
VCC = 3.6V
VG = 6dB
RL = 8Ω
Rg = 620Ω
Vr = -20dBV
CVCC = 0.1µF
Supply voltage, VCC -- V
140
2
4pin voltage, VCNT -- V
ICCO -- VCC
6
Supply current, ICCO -- mA
5 7 1k
3.8
0
Noise voltage, VNO -- µVrms
2 3
Frequency, f -- Hz
3.5
Supply current, ICCO -- mA
5
0
10
70
Load resistance, RL -- Ω
4
C IN
1
0
10
6
2
THD = 1%
0
VG -- f
8
VCC = 3.6V
VG = 6dB
fin = 1kHz
200Hz<BW<20kHz
CI
N = 0.
33µF
CI
N = 0.
22µF
CI
N =0
.1µF
600
5
ñ 20
VMUTE -- VIN
VCC = 3.6V
VCNT = 0V
f = 1kHz
RL = 8Ω
VG = 6dB
20Hz<BW<20kHz
ñ 30
ñ 40
ñ 50
ñ 60
ñ 70
5.5
ñ 80
ñ 30
ñ 20
ñ 10
0
10
Input voltage, VIN -- V
No.A1492-9/11
LV4991M
4
160
3.5
140
Noise voltage, VNO ñ µV
Supply current, ICCO -- mA
Temperature Characteristics
ICCO -- Ta
3
2.5
2
1.5
1
VCC = 3.6V
VG = 6dB
RL = ∞
0.5
0
ñ 50
0
50
120
100
80
60
20
0
ñ 50
100
Output power, PO -- mW
1300
1200
1100
VCC = 5V
1000
900
800
700
600
VCC = 3.6V
500
400
VCC = 3V
300
50
100
PO -- Ta
1200
1100
1000
Output power, PO -- mW
RL = 8Ω
VG = 6dB
THD = 10%
fin = 1kHz
200Hz<BW<80kHz
1400
0
Temperature, Ta -- °C
PO -- Ta
1500
VCC = 3.6V
Rg = 0Ω
RL = 8Ω
VG = 6dB
20Hz<BW<20kHz
40
Temperature, Ta -- °C
1600
VNO -- Ta
900
VCC = 5
V
RL = 8Ω
VG = 6dB
THD = 1%
fin = 1kHz
200Hz<BW<80kHz
800
700
600
500
VCC = 3.6V
400
300
VCC = 3V
200
200
100
0
ñ 50
100
0
50
0
ñ 50
100
Temperature, Ta -- °C
PO -- Ta
RL = 16Ω
VG = 6dB
THD = 10%
fin = 1kHz
200Hz<BW<80kHz
1100
Output power, PO -- mW
1000
900
VCC = 5V
800
700
600
500
400
VCC = 3.6V
300
VCC = 3V
1000
900
800
700
500
400
100
0
ñ 50
100
Temperature, Ta -- °C
Output power, PO -- mW
600
500
VCC = 5V
400
300
VCC = 3.6V
VCC = 3V
200
100
0
ñ 50
50
100
PO -- Ta
800
RL = 32Ω
VG = 6dB
THD = 1%
fin = 1kHz
200Hz<BW<80kHz
700
Output power, PO -- mW
RL = 32Ω
VG = 6dB
THD = 10%
fin = 1kHz
200Hz<BW<80kHz
700
0
Temperature, Ta -- °C
PO -- Ta
800
VCC = 3.6V
VCC = 3V
300
200
50
VCC = 5V
600
100
0
100
RL = 16Ω
VG = 6dB
THD = 1%
fin = 1kHz
200Hz<BW<80kHz
1100
200
0
ñ 50
50
PO -- Ta
1200
Output power, PO -- mW
1200
0
Temperature, Ta -- °C
600
500
400
VCC = 5V
300
VCC = 3.6V
VCC = 3V
200
100
0
50
Temperature, Ta -- °C
100
0
ñ 50
0
50
100
Temperature, Ta -- °C
No.A1492-10/11
LV4991M
Pop sound
1. Startup
2. Fall
2pin : 5V/div, DC
STBY→PWR
OUT1-OUT2 : 10mV/div, AC
2pin : 5V/div, DC
PWR→STBY
OUT1-OUT2 : 10mV/div, AC
3pin : 200mV/div, DC
200ms/div
200ms/div
3pin : 200mV/div, DC
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are
controlled under any of applicable local export control laws and regulations, such products may require the
export license from the authorities concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise,
without the prior written consent of SANYO Semiconductor Co.,Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
Upon using the technical information or products described herein, neither warranty nor license shall be granted
with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's
intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of June, 2009. Specifications and information herein are subject
to change without notice.
PS No.A1492-11/11