la47202p

la47202p
Ordering number : ENA0508
Monolithic Linear IC
LA47202P
Four-Channel BTL Power
Amplifier for Car Audio Systems
Overview
The LA47202P is a 4-channel BTL power amplifier IC developed for use in car audio applications. The LA47202P adopts
a pure complementary output stage circuit structure with a v-pnp transistor for the high side and an npn transistor for the
low side to provide both high output power and high quality sound.
The LA47202P integrates all the functions required for car audio applications on the same chip, including a standby switch,
a muting function, and a full complement of protection circuits. It also features a self diagnostics function.
Functions
• High output : PO max = 47W (typ.) (VCC = 14.4V, f = 1kHz, JEITA max, RL = 4Ω)
: PO max = 29W (typ.) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4Ω)
: PO max = 22W (typ.) (VCC = 14.4V, f = 1kHz, THD = 1%, RL = 4Ω)
• Muting function incorporated (pin 22)
• Built-in standby switch (pin 4)
• Self diagnostics function incorporated (pin 25) :
Output of both output offset detection, shorting to VCC or ground and load shorting signals
• Electric mirror noise decrease
• Full compliment of protection circuits (shorting to VCC, shorting to ground, load shorting, overvoltage, and thermal
protection).
• Improved oscillation stability
Note 1 : Take care to avoid wrong connection. Otherwise, IC or equipment may suffer breakdown, damage, or deterioration.
Note 2 : The protective circuit function is to avoid the abnormal state (wrong connection of the output) temporarily and does
not guarantee that IC is not broken.
These protective functions do not operate outside the operation guarantee range, and wrong connection of output
may cause breakdown of IC.
Note 3 : External parts, such as the anti-oscillation part, diode to prevent breakdown, may become necessary depending on the
set condition. Check their necessity for each set.
Any and all SANYO Semiconductor products described or contained herein do not have specifications
that can handle applications that require extremely high levels of reliability, such as life-support systems,
aircraft's control systems, or other applications whose failure can be reasonably expected to result in
serious physical and/or material damage. Consult with your SANYO Semiconductor representative
nearest you before using any SANYO Semiconductor products described or contained herein in such
applications.
SANYO Semiconductor 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
products described or contained herein.
D2706 MS PC 20060809-S00002 No.A0508-1/8
LA47202P
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
VCC max1
Without signal, t = 1 minute
26
VCC max2
When operating
18
V
4.5
A
Maximum output current
IO peak
Per channel
Allowable power dissipation
Pd max
With an iInfinitely large heat sink
V
50
W
Operating temperature
Topr
-40 to +85
°C
Storage temperature
Tstg
-40 to +150
Thermal resistance between
θj-c
1
°C
°C/W
junction cases
Note) The relationship between the power dissipation (Pd) and the junction-to-case thermal resistance (θj-c), heat sink
thermal resistance (θf) and junction temperature (Tj), case temperature (Tc), and ambient temperature (Ta) is as
expressed by the following equation :
Tj = Pd (θj-c+θf) +Ta
= Pd×θj-c+Tc,
*Tc = Pd×θf+Ta
Note that Tj max must be limited with Tstg max (150°C).
Recommended Operating Ranges at Ta = 25°C
Parameter
Recommended supply voltage
Symbol
Conditions
Ratings
VCC
Recommended load resistance
RL
Operating supply voltage range
VCC op
Range not exceceeding Pd max
Unit
14.4
V
4
Ω
9 to 16
V
Electrical Characteristics at Ta = 25°C, VCC = 14.4V, RL = 4Ω, f = 1kHz, Rg = 600Ω
Parameter
Symbol
Ratings
Conditions
min
Quiescent current
Standby current
Voltage gain
Voltage gain difference
Output power
Output offset voltage
Total harmonic distortion
ICCO
RL = ∞, Rg = 0
Ist
Vst = 0V
VG
VO = 0dBm
∆VG
PO
typ
200
25
26
-1
THD = 10%
24
Unit
max
400
mA
10
µA
27
dB
+1
dB
29
W
PO max1
VCC = 13.7V, JEITA max
42
W
PO max2
JEITA max
47
W
Vnoffset
Rg = 0
THD
-150
PO = 4W
+150
0.05
0.3
mV
%
Channel separation
CHsep
VO = 0dBm, Rg = 10kΩ
55
65
dB
Ripple rejection ratio
SVRR
Rg = 0, fr = 100Hz, VCCR = 0dBm
45
60
dB
Output noise voltage
VNO
Input resistance
Ri
Mute attenuation
Matt
Rg = 0, BPF = 20Hz to 20kHz
VO = 20dBm, mute : on
100
65
200
µVrms
50
kΩ
80
dB
* 0dBm = 0.775Vrms
No.A0508-2/8
LA47202P
Block Diagram
VCC1/2
6
IN 1
+
VCC3/4
+
2200µF
+
9
OUT 1+
0.47µF
CONTROL
-
7
OUT 1-
PWR GND1
Protective
circuit
12
8
+
+
5
-
-
3
OUT 2+
0.47µF
DC
22µF
+
AC GND
+
0.47µF
RL
1
4700pF
IN 2
+
VCC
20
+
11
0.1µF
10
Ripple
filter
OUT 2-
RL
PWR GND2
2
25
16
4.7kΩ
OFFSET
DIAG
5V
PRE GND
IN 3
+
Mute 10kΩ
Mute
circuit
13
15
22
+
+
17
-
-
19
+
1µF
OUT 3+
0.47µF
14
OUT 3-
18
+
+
-
-
21
OUT 4+
0.47µF
STBY
+5V
ST ON
4
Standby
switch
RL
PWR GND3
Protective
circuit
IN 4
+
Low Level
Mute ON
23
OUT 4-
RL
PWR GND4
24
The components and constant values in the test circuit are used for confirmation of characteristics and do not guarantee
that the application equipment will be free from malfunction or trouble.
No.A0508-3/8
LA47202P
Description of Operation
1. Standby switch function (pin 4)
The pin 4 threshold voltage is set to about 3 VBE.
The amplifier is turned ON at the application voltage of 3.0V or more and OFF at 0.5V or less.
2. Muting function (pin 22)
When pin 22 is set to the ground potential, the LA47202P goes to the muted state. This supports implementation of an
audio muting function.
The muting function is turned on when a level of 1V or lower is applied through a 10kΩ resistor, and the function is
turned off when this pin is open.
The muting time constant can be set with an external RC circuit.
3. Self diagnostics function (pin 25)
This function detects abnormal IC states, and outputs a signal from pin 25. Applications can prevent damage to
speakers and other problems by using a microcontroller to detect the pin 25 signal and control the standby switch
accordingly.
(1) Output short-circuit to VCC/ground : Pin 25 becomes LOW.
(2) Load short-circuit
: Pin 25 repeats HIGH and LOW states according to the output signal.
(3) Output offset abnormality
: Pin 25 goes low if the OUT pin (VN) voltage becomes lower than the
detection level. Problems that can cause an output offset abnormality
include input capacitor leakage and half shorts between the input pins and
adjacent circuit components.
Note that pin 25 is the NPN open collector output (active low). Keep pin 25 open-connection when not using.
4. CONTROL pin (pin 1)
The protective circuit response speed is adjusted by the pin 1 capacitor.
By adjusting the response speed of the protective circuit, abnormal sound generated when the protective circuit
operates at input of the large signal can be prevented.
When the capacitance value increases, abnormal sound is more difficult to be generated, but the response speed of the
protective circuit becomes lower. The capacitance value must be limited to maximum 0.01µF. The recommended
value is 4700pF.
Check the optimum value for each set.
As this is designed so that the protective circuit is activated when pin 1 has the GND potential, the protective circuit
becomes normally active when the capacitor is short-circuited.
5. AC GND pin (pin 16)
Be sure to use the pin 16 capacitor with the capacity the same as that of the input capacitor and connect it to PREGND
the same as that of the input capacitor.
6. Sound quality (low frequencies)
The frequency characteristics in low frequency range may be improved by varying the capacitance of input capacitor.
Note that this may cause influence on the shock noise, carry out confirmation with each set before varying the
capacitance value.
7. Impulse noise related systems
While the LA47202P does include an impulse noise prevention circuit, we recommend using the muting function
together with this circuit.
• When the amplifier is ON, turn ON the muting function simultaneously with power ON. When the output DC
potential has stabilized, turn OFF the muting function.
• When turning OFF the amplifier, first turn ON the muting function, then turn OFF power supply.
No.A0508-4/8
LA47202P
8. Oscillation stability
Pay due attention on the following points because parasitic oscillation may occur due to effects of the capacity load,
board layout, etc.
(1) Capacity load
When the capacitor is to be inserted between each output pin and GND so as to prevent electric mirror noise, select
the capacitance of maximum 1200pF. (Conditions : Our recommended board, RL = 4Ω)
(2) Board layout
• Provide the VCC capacitor of 0.1µF in the position nearest to IC.
• PREGND must be independently wired and connected to the GND point that is as stable as possible, such as the
minus pin of the 2200µF VCC capacitor.
In case of occurrence of parasitic oscillation, any one of following parts may be added as a countermeasure.
Note that the optimum capacitance must be checked for each set in the mounted state.
• Series connection of CR (0.1µF and 2.2Ω) between BTL outputs
• Series connection of CR (0.1µF and 2.2Ω) between each output pin and GND.
Package Dimensions
unit : mm (typ)
3236A
(22.8)
4.5
14.5
(14.4)
(11.0)
21.7
18.6 max
(R1.7)
(5.0)
0.4
1
25
(2.6)
(1.0)
2.0
0.52
3.5
(12.3)
( 2.5)
4.0
4.2
2.0
Maximum power dissipation, Pd max -- W
25.6
(8.5)
Pd max -- Ta
70
29.2
60
50
Infinite heat sink θj-c=1°C/W
40
30
heat sink(θf=3.5°C/W)
θj-c+θf=4.5°C/W
20
10
0
-40
No heat sink θj-a=39°C/W
-20
0
20
40
60
80
100
120
140
160
Ambient temperature, Ta -- °C
SANYO : HZIP25
No.A0508-5/8
LA47202P
ICCO -- VCC
VN -- VCC
12
RL = Open
Rg = 0Ω
Output midpoint voltage, VN -- V
Quiescent current, ICCO -- mA
250
200
150
100
50
0
RL = Open
Rg = 0Ω
10
8
6
4
2
0
4
6
8
10
12
14
16
18
4
20
6
8
Supply voltage, VCC -- V
PO -- VCC
50
Output power, PO -- W
Output power, PO -- W
20
0
10
11
12
13
14
15
16
17
2 3
5 7 100
2 3
VCC = 14.4V
RL = 4Ω
f = 1kHz
1.0
7
5
3
2
0.1
7
5
CH4
CH2
3
2
CH3
CH1
2
3
5 7 1.0
2
3
5 7 10
2
3
10
7
5
5 7 100
VCC = 14.4V
RL = 4Ω
f = 10kHz
1.0
7
5
0.1
7
5
CH1
CH3
CH2
CH4
3
2
0.01
0.1
2
3
5 7 1.0
2
3
5
7 10
Output power, PO -- W
2 3
5 7100k
3
2
1.0
7
5
3
2
0.1
7
5
CH4
CH2
3
2
CH3
CH1
2
3
5 7 1.0
2
3
5 7 10
2
3
5 7 100
2
3
5
Output power, PO -- W
THD -- PO
3
2
5 7 10k
VCC = 14.4V
RL = 4Ω
f = 100Hz
0.01
0.1
Total harmonic distortion, THD -- %
Total harmonic distortion, THD -- %
3
2
2 3
THD -- PO
Output power, PO -- W
10
7
5
5 7 1k
Frequency, f -- Hz
THD -- PO
0.01
0.1
20
VCC = 14.4V
RL = 4Ω
THD = 1%
0
10
18
Total harmonic distortion, THD -- %
Total harmonic distortion, THD -- %
3
2
18
10
Supply voltage, VCC -- V
10
7
5
16
15
5
10
9
14
20
30
8
12
PO -- f
25
f = 1kHz
RL = 4Ω
THD = 10%
40
10
Supply voltage, VCC -- V
2
3
5 7 100
1.0
7
5
3
2
THD -- f
VCC = 14.4V
RL = 4Ω
PO = 4W
0.1
7
5
CH4 CH2
3
2
0.01
7
5
CH1
CH3
3
2
0.001
100
2
3
5 7 1k
2
3
5
7 10k
7 100k
Frequency, f -- Hz
No.A0508-6/8
LA47202P
Response -- f
VCC = 14.4V
RL = 4Ω
VO = 0dBm
Response -- dB
0
--1
--2
--3
10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
VNO -- Rg
150
Output noise voltage, VNO -- mVrms
1
VCC = 14.4V
RL = 4Ω
100
50
0
10
5 7100k
2 3
5 7 100
2 3
Frequency, f -- Hz
3
CH
60
Channel separation -- dB
1→
1→
4
50
2
1→
CH
Channel separation -- dB
2 3
5 7100k
70
CH
40
VCC = 14.4V
RL = 4Ω
Rg = 10kΩ
VO = 0dBm
(CH1→)
30
20
10
2 3
CH
60
2 3
5 7 1k
2 3
5 7 10k
2 3
CH
50
2→
1
40
30
5 7 100
2→
3
CH
2→
4
VCC = 14.4V
RL = 4Ω
Rg = 10kΩ
VO = 0dBm
(CH2→)
20
10
5 7100k
2 3
5 7 100
Frequency, f -- Hz
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
Frequency, f -- Hz
CH. Separation -- f
80
CH. Separation -- f
80
70
70
Channel separation -- dB
CH
3→
60
2
CH
3→
CH
50
2
3→
4
Channel separation -- dB
5 7 10k
CH. Separation -- f
80
70
40
VCC = 14.4V
RL = 4Ω
Rg = 10kΩ
VO = 0dBm
(CH3→)
30
20
10
2 3
CH
2 3
5 7 1k
2 3
5 7 10k
2 3
1
CH
50
4→
2
40
VCC = 14.4V
RL = 4Ω
Rg = 10kΩ
VO = 0dBm
(CH4→)
20
10
5 7100k
2 3
5 7 100
VCCR = 0dBm
fR = 100Hz
Rg = 0Ω
RL = 4Ω
CVCC = 0.1µF
8
10
12
14
Supply voltage, VCC -- V
2 3
5 7 10k
2 3
5 7100k
16
18
5 7 10k
2 3
5 7100k
CH2
4
70
CH
Ripple rejection ratio, SVRR -- dB
60
40
5 7 1k
SVRR -- fR
80
70
50
2 3
Frequency, f -- Hz
SVRR -- VCC
80
3
4→
60
30
5 7 100
4→
CH
Frequency, f -- Hz
Ripple rejection ratio, SVRR -- dB
2 3
Rg -- V
CH. Separation -- f
80
5 7 1k
CH3
60
CH1
50
VCC = 14.4V
VCCR = 0dBm
Rg = 0Ω
RL = 4Ω
CVCC = 0.1µF
40
10
2 3
5 7 100
2 3
5 7 1k
2 3
Ripple frequency, fR -- Hz
No.A0508-7/8
LA47202P
SVRR -- VCCR
CH2
70
CH3
60
CH1
CH4
60
VCC = 14.4V
fR = 100Hz
Rg = 0Ω
RL = 4Ω
CVCC = 0.1µF
50
40
0
VCC = 16V
40
30
VCC = 14.4V
20
10
SVRR = 20log (VCCR / VO)
0.5
1.0
1.5
2.0
Supply ripple voltage, VCCR -- Vrms
0
0.1
Pd = VCC×ICC-4PO
2
3
5 7 1.0
2
3
5 7 10
2
3
5 7 100
Output power, PO -- W
Offset DIAG -- VCC
10
Pd -- PO
f = 1kHz
RL = 4Ω
50
Power dissipation, Pd -- W
Ripple rejection ratio, SVRR -- dB
80
RL = 4Ω
Rg = 0Ω
Offset DIAG -- V
8
6
1/2 VCC
4
Detection Level
2
0
8
10
12
14
16
18
Supply voltage, VCC -- V
Specifications of any and all SANYO Semiconductor 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.
SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any
and all semiconductor products fail with some probability. It is possible that these probabilistic failures
could give rise to accidents or events that could endanger human lives, that could give rise to smoke or
fire, or 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 products (including technical data,services) described
or contained herein are controlled under any of applicable local export control laws and regulations, such
products must not be exported without obtaining 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 permission 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 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. SANYO Semiconductor believes information herein is accurate and
reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual
property rights or other rights of third parties.
This catalog provides information as of December, 2006. Specifications and information herein are subject
to change without notice.
PS No.A0508-8/8
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