ENA2051 D

Ordering number : ENA2051
LA4631VC
Monolithic Linear IC
2-Channel SE AF Power Amplifier
for Home Audio Use
http://onsemi.com
Overview
The LA4631VC built-in a 2 channel single-ended output power amplifier that a power supply voltage range is wide and
has additionally the standby function to reduce the current drain. It is a power amplifier IC suitable for driving speaker
of various audio system equipments, which is especially useful for products that use batteries.
Functions
• Output power = 4.5W (typical)
• Built in standby function (Pin5)
• Built in thermal suht down circuit
(VCC = 12V, RL = 3Ω, THD+N = 10%)
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
VCC max
With no input signal
24
V
Maximum output current
IO peak
Per channel
2.5
A
Allowable power dissipation
Pd max
With an infinitely large heat sink
25
W
Operating temperature
Topr
-20 to +75
°C
Storage temperature
Tstg
-40 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Operating Conditions at Ta = 25°C
Parameter
Symbol
Recommended supply voltage
VCC
Recommended load resistance range
RL op
Allowable
VCC op
operating
supply
voltage
Conditions
Ratings
Unit
12
V
3 to 8
Ω
5.5 to 22
V
range
*: VCC, RL, and output level such that Pd max, is not exceeded for the size of heat sink used.
Semiconductor Components Industries, LLC, 2013
May, 2013
41812 SY 20120203-S00005 No.A2051-1/7
LA4631VC
Electrical Characteristics at Ta = 25°C, VCC = 12V, RL = 3Ω, f = 1kHz, Rg = 600Ω
Parameter
Symbol
Quiescent current
ICCO
Standby current
Ist
Voltage gain
VG
Conditions
Rg = 0Ω
Ratings
Min.
18
VO = 0dBm
33
Typ.
Max.
Unit
35
80
mA
1
10
µA
35
37
dB
0.15
0.4
Total harmonic distortion
THD
PO = 1W
Output power
PO1
THD = 10%
3.0
4.5
W
PO2
VCC = 9V, THD = 10%
2.0
2.5
W
Output noise voltage
VNO
Rg = 0Ω, BPF = 20Hz to 20kHz
Ripple rejection
SVRR
Rg = 0Ω, fR = 100Hz, VCCR = 0dBm
50
60
Channel separation
CHsep
Rg = 10kΩ, VO = 0dBm
55
65
Input resistance
Ri
20
30
Standby pin applied voltage
Vst
1.5
5.0
Amplifier on(Pin 5 voltage)
0.05
0.25
%
mVrms
dB
dB
40
kΩ
V
Package Dimensions
Unit : mm (typ)
3049C
26.8
(20.0)
HEAT SPREADER
4.0
13.2 MAX
6.0
1.0 MIN
7.0
(11.8)
(8.4)
(R1.7)
12
1
0.5
(2.4)
2.0
0.4
1.0
2.0
SANYO : SIP12H
Pd max -- Ta
Allowable power dissipation, Pd max -- W
30
With an infinitely
large heat sink
25
20
15
12.5
100 ×100 ×1.5mm3
10
7
50× 50× 1.5mm3
5
Single IC
3.2
0
-20
0
20
40
60
80
100
120
140
160
Ambient temperature, Ta -- C
No.A2051-2/7
LA4631VC
Block Diagram
Application Circuit Example
LA4631VC
Ripple
Filter
IN1
PRE
GND
IN2
Standby
P.P
VCC
OUT2
NC
PWR
GND
NC
OUT1
1
2
3
4
5
6
7
8
9
10
11
12
+
+
+
RL
+
RL
+
VSTB 5V
+
+
Top view
VCC
No.A2051-3/7
LA4631VC
External Components and Usage Notes
C1, C2 : These are input coupling capacitors; we recommend a value of 1μF or lower. The LA4631VC input pin
potential is about 1.4V, and the polarity must be considered due to the DC potential of the circuits connected
to the LA4631VC front end. The amplifier's startup time (the time from the point power is first applied until
the point an output is generated) will change proportionally with the values of these input capacitors. (When
1μF capacitors are used, the startup time will be about 0.2 seconds.)
C3
: This capacitor is used as a ripple filter. We recommend a value of 100μF. Amplifier impulse noise when
turned off (when the standby pin goes low) may be made worse if a value under 100μF is used. The pin 1
voltage is about 1/2VCC. A DC mute function can be applied if pin 1 is connected to ground through a 300 to
500Ω resistor. Note that the muting activation voltage will be too low if a resistor value of 750Ω or higher is
used.
C4
: This is an impulse noise prevention capacitor. The recommended value is 4.7μF. If a value of 2.2μF or lower
is used for C4, impulse noise when the amplifier is turned off (when the standby pin goes low) may be made
worse. Also, if a value of 10μF or higher is used, an "incomplete muting" phenomenon may occur when the
amplifier is turned off (when the standby pin goes low).
C5
: Power supply capacitor. This capacitor should be located as close as possible to the IC (to minimize
increases in the power supply line impedance) to achieve stable amplifier operation.
C6, C7 : Output capacitors. These capacitors influence the amplifiers low band frequency characteristics. (fc =
1/2πCout×RL)
fc = low band cutoff frequency, Cout = C6, C7
(Reference) Pin 5 Equivalent Circuit Inside IC
(Reference) Pin 5 IC internal equivalent circuit
Rx
Ix
STBY
R2
2k
5
R1
2k
Standby
applied
voltage Vx
+
Ix=max 4.5mA
• The amplifier can be turned on and off by controlling the level (high/low) of Pin 5.
• Applying a signal equal or greater than 1.5V and 800μA to Pin 5 turns on the amplifier. (If 5V is applied directly to
Pin 5 the inflow current od Pin 5 is approximately 4.5mA.)
• If a voltage, Vx, exceeding 5V is to be applied, current limiting resistor (Rx) should be inserted to limit the inflow
current to 4.5mA. (See following equation.)
Rx = (Vx – 5V)/4.5mA
• If Pin 5 is to be controlled by the microprocessor, the Pin 5 inflow current (Ix) should be optimized for the capacity
of the microprocessor by calculating Rx using the following equation, as a general guideline, and then confirming
the inflow current through sctual measurement.
Rx = (Vx/Ix) – R1 (2kΩ)
Note: When apply voltage to standby (Pin 5), please add resistor (Rx).
No.A2051-4/7
LA4631VC
ICCO -- VCC
110
PO -- VCC
12
10
90
80
Output power, P O -- W
Quiescent current, ICCO -- mA
100
70
60
50
40
30
20
8
6
4
2
10
0
0
0
2
4
8
6
10
12
14
16
18
22
20
24
4
6
8
THD -- PO
10
Total harmonic distortion, THD -- %
Total harmonic distortion, THD -- %
2
f = 10kHz
1.0
7
5
f = 100Hz
3
f = 1kHz
2
3
5
7
1.0
2
3
5
7
2
1.0
7
5
3
2
10
2 3
5 7 100 2 3
Consumption current, I CC -- mArms
4
3
2
1
3
5
7
1.0
2
3
5
7
800
600
400
200
2
3
Consumption current, I CC -- mArms
1
1.0
2
Output power, P O -- W
7
1.0
2
3
5
7
10
5
7
10
ICC - PO (VCC=9V)
2
7
5
1200
3
5
5 7 100k
Output power, P O -- W
VCC = 9V
f = 1kHz
3
2 3
1000
0
0.1
10
Pd - PO (VCC=9V)
2
5 7 10k
VCC = 12V
f = 1kHz
Output power, P O -- W
4
2 3
ICC - PO (VCC=12V)
1200
5
2
5 7 1k
Frequency, f -- Hz
VCC = 12V
f = 1kHz
Power dissipation, Pd -- W
22
20
3
0.1
10
Pd - PO (VCC=12V)
6
Power dissipation, Pd -- W
18
5
Output power, P O -- W
0
0.1
16
7
3
0
0.1
14
THD -- f
5
0.1
0.1
12
10
7
2
10
Supply voltage, VCC -- V
Supply voltage, VCC -- V
3
5
7
10
VCC = 9V
f = 1kHz
1000
800
600
400
200
0
0.1
2
3
5
7
1.0
2
3
Output power, P O -- W
No.A2051-5/7
LA4631VC
PO -- f
Gain -- f
6
35
5
Output power, P O -- W
37
Gain -- dB
33
31
29
4
THD = 1%
3
2
1
27
25
10
THD = 10%
2 3
5 7 100 2 3
5 7 1k
2 3
5 7 10k
2 3
0
10
5 7 100k
2 3
5 7 100 2 3
Frequency, f -- Hz
CHsep -- f
80
5 7 10k
2 3
5 7 100k
5 7 10k
2 3
5 7 100k
5 7 10k
2 3
5 7 100k
VNO -- Rg
ch1 ch2
Output noise voltage, VNO -- mVrms
Channel separation, CHsep -- dB
2 3
0.5
70
60
ch2 ch1
50
40
30
20
10
0
10
5 7 1k
Frequency, f -- Hz
2 3
5 7 100 2 3
5 7 1k
2 3
5 7 10k
2 3
0.4
0.3
0.2
0.1
0
10
5 7 100k
2 3
5 7 100 2 3
5 7 1k
2 3
Frequency, f -- Hz
SVRR -- VCC
70
60
50
40
30
20
10
6
8
10
12
14
16
18
20
70
60
50
40
30
20
10
0
10
0
4
SVRR -- fR
80
Supply voltage rejection ratio, SVRR -- dB
Supply voltage rejection ratio, SVRR -- dB
80
22
2 3
5 7 100 2 3
5 7 1k
Supply voltage, VCC -- V
SVRR -- VCCR
I CCO -- Vstby
80
VCC = 12V
RL = 3Ω
Rg = 0Ω
70
70
Quiescent current, ICCO -- mA
Supply voltage rejection ratio, SVRR -- dB
80
60
50
40
30
20
10
0
0.5
VCC = 12V
RL = 3Ω
Rg = 0Ω
fR = 100Hz
BPF = 20Hz to 20kHz
SVRR = 20log(VO/VCCR)
0.8
1.1
2 3
fR -- Hz
60
50
40
30
20
10
0
1.4
VCCR -- Vrms
1.7
2.0
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Vstby -- V
PS No.A2051-6/7
LA4631VC
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number
of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at
www.onsemi.com/site/pdf/Patent-Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no
warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the
application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical
experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use
as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in
which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for
any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors
harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the
part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PS No.A2051-7/7
Similar pages