SANYO LA47536

Ordering number : ENN7901
SANYO Semiconductors
DATA SHEET
Monolithic Linear IC
LA47536
Four-Channel 45 W BTL Car Audio
Power Amplifier
Overview
The LA47536 is a 4-channel BTL power amplifier IC developed for use in car audio systems. The output stage features
a pure complimentary structure that uses V-pnp transistors on the high side and npn transistors on the low side to
provide high power and superb audio quality.
The LA47536 includes almost all the functions required for car audio use, including a standby switch, a muting
function, and each protection circuit. It also provides a self-diagnosis function (output offset detection).
Functions and Features
• Voltage gain: 32 dB
• High output power
— Pomax(1) = 45 W (typical)
(At VCC = 14.4 V, f = 1 kHz, Vi = 2.5 Vrms, RL = 4 Ω)
— Pomax(2) = 40 W (typical)
(At VCC = 13.7 V, f = 1 kHz, Vi = 2.5 Vrms, RL = 4 Ω)
— Po = 28 W (typical)
(At VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
• Muting function (pin 22)
• Standby switch (pin 4)
• Built-in various protection circuits
— Output pin-to-VCC short
— Output pin-to-GND short
— Load short
— Over voltage
— Thermal shut down
• Self-diagnosis function that detects the output offset (pin 25)
• Output offset detection on/off switch (pin 1)
Any and all SANYO 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 representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO 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 products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
40804TN (OT) No.7901-1/7
LA47536
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
VCC max1
No signal, t = 1 minute
26
VCC max2
With an input signal applied
18
V
4.5/ch
A
Maximum output current
IO peak
Per channel
Allowable power dissipation
Pd max
Assuming an infinite heat sink
V
50
W
Operating temperature
Topr
–40 to +85
°C
Storage temperature
Tstg
–40 to +150
Junction to case thermal resistance
θ j-c
1
°C
°C/W
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
VCC
14.4
V
Recommended load resistance
RLop
4
Ω
Operating supply voltage range
VCC op
9 to 18
V
The range where Pd max is not exceeded
Electrical Characteristics at Ta = 25°C, VCC = 14.4 V, RL = 4 Ω, f = 1 kHz, Rg = 600 Ω
Parameter
Quiescent current
Standby current
Output offset
Voltage gain
Voltage gain difference
Symbol
ICCO
Vst = 0
VN offset
Rg = 0
PO max1
PO max2
Total harmonic distortion
THD
typ
400
–150
VO = 0 dBm
31
32
–1
THD = 10%
23
VCC = 13.7 V, VIN = 2.5 Vrms
Rg = 0, fr = 100 Hz, Vccr = 0 dBm, 20 Hz to 20 kHz
40
Ripple rejection ratio
SVRR
Output noise voltage
VNO
Rg = 0, 20 Hz to 20 kHz
Muting attenuation
Ma
VO = 20 dBm
Output center point potential
VN
Rg = 0
33
dB
+1
dB
W
45
50
mV
W
0.1
VO = 0 dBm, Rg = 10 kΩ
µA
+150
40
VIN = 2.5 Vrms
CHsep
mA
10
28
PO = 4 W
Channel separation
Unit
max
200
∆VG
PO 1
Output power
min
RL = ∞, Rg = 0
Ist
VG
Ratings
Conditions
W
0.4
%
60
dB
45
dB
300
70
450
µVrms
90
dB
2.65
V
Package Dimensions
unit : mm
3236
Pd max —Ta
Allowable power dissipation, Pd max — W
60
SANYO : HZIP25
INFINTE HEAT SINK θj-c=1°C/W
50
40
30
HEAT SINK(θf=3.5°C/W)
θj-c+θf=4.5°C/W
20
10
NO HEAT SINK θj-a=39°C/W
0
–40
–20
0
20
40
60
80
100
120
Ambient temperature, Ta — °C
140
160
ILA06775
No.7901-2/7
LA47536
Functional Description
1. Standby Switch Function (pin 4)
The pin 4 threshold voltage is set to be 2 VBE. When Vst is 2.0V or higher, the amplifier will be on, and when Vst is
0.7V or lower, the amplifier will be off. Note that pin 4 requires an operating current of at least 40µA.
2. Muting Function
The IC is set to the muted state by setting pin 22 to the ground potential. In this state, the audio output is muted. The
time constant with which the muting function operates is set by an external RC circuit, and this time constant
influences the pop noise that occurs when the amplifier is turned on or off.
The muting on and off times due to the recommended external component values (R=10kΩ, C=3.3µF) are as follows.
Muting on time: 50ms
Muting off time: 20ms
3. Self-Diagnosis Function (Speaker burnout prevention)
During steady state operation, the LA47536 detects, internally, whether or not an abnormal amplifier output offset
has occurred, and outputs this signal from pin 25. Applications can prevent speaker burnout and other problems by
having the system microcontroller detect this pin 25 output signal and control either the standby state or the power
supply. (An abnormal output offset may be caused by, for example, input capacitor leakage current.)
The pin 25 signal is turned off by setting pin 1 to the ground potential.
4. Oscillator Stability
In some cases, parasitic oscillations may be induced by the PCB layout. This oscillation can be eliminated by adding
the components listed below. Note that the optimal capacitor value must be verified by testing in the actual mounted
state in the end product.
• Connect a capacitor and resistor (0.1µF and 2.2Ω) in series between each output pin and ground.
5. Audio Quality (Low band)
The frequency characteristics in the low frequencies can be improved by making the capacitance of the input
capacitors variable.
The recommended capacitance is 2.2µF and smaller.
6. Protection Circuits
Do not ground the outputs with the STBY voltage at around 1.4V. Also, do not turn the IC off in the grounded state
with a time constant provided for the STBY voltage.
7. Pop Noise
Although the LA47536 includes an pop noise prevention circuit, pop noise can be reduced even further by using the
muting function as well.
• Activate the muting function at the same time as power is applied. Then, after the output DC potential has
stabilized, turn off the muting function.
• When turning the amplifier off, first turn on the muting function and then turn off the power supply.
These two methods are effective at minimizing pop noise.
No.7901-3/7
LA47536
Block and Application Diagram
+
2200µF
Vcc1/2
20
6
IN1
+
11
0.22µF
+5V
10kΩ
25
Offset
Detect
Circuit
+
9
–
–
7
12
OUT1–
PWR GND1
Protective
circuit
+
OUT1+
+
OFFSET DET
IN2
0.022µF
Vcc3/4
8
–
+
5
+
–
3
OUT2+
OUT2–
0.22µF
PWR GND2
2
Aux
ST BY
Stand by
circuit
4
Switch
+5V
ST ON
Mute
Ripple
R.F
+
Mute
22
10
Filter
47µF
10kΩ
+
circuit
3.3µF
IN3
+
15
+
+
17
–
–
19
0.22µF
OFFSET DET
OFF S.W
OUT3+
Low Level
Mute ON
OUT3–
1
PWR GND3
GND
OFFSET DET
OFF
PRE GND
13
+
IN4
Protective
circuit
14
18
–
+
21
+
–
23
OUT4+
OUT4–
0.22µF
ON TIME C
22µF
+
16
Muting &
ON Time Control
Circuit
PWR GND4
24
* Package: HZIP25
No.7901-4/7
LA47536
ICCO — VCC
300
250
200
150
100
50
0
8
10
12
14
16
18
Supply voltage, VCC — V
20
10
8
9
10
11
12
13
14
15
16
17
0.1
7
5
3
2
5 7 1.0
2
3
5 7
2
10
Output power, PO — W
3
16
3
2
0.1
7
5
3
2
2
3
5 7 1.0
2
3
5 7
5
Response — dB
5
THD — PO
3
2
1.0
7
5
3
2
2
3
5 7 1.0
2
3
5 7
2
10
3
5
ILA06763
Response — f
VCC=14.4V
RL=4Ω
VO=0dBm
Cin=0.22µF
2
0.1
7
5
3
ILA06761
VCC=14.4V
RL=4Ω
f=10kHz
4
3
2
2
10
Output power, PO — W
THD — f
20
ILA06759
1.0
7
5
ILA06762
1.0
7
5
18
THD — PO
0.1
7
0.1
5
VCC=14.4V
RL=4Ω
PO=4W
0
–2
–4
–6
3
2
0.01
100
3
2
7
3
2
14
VCC=14.4V
RL=4Ω
f=1kHz
10
1.0
7
5
12
Output power, PO — W
THD — PO
3
10
ILA06760
VCC=14.4V
RL=4Ω
f=100Hz
2
10
7
5
0.01
0.1
18
Total harmonic distortion, THD — %
Total harmonic distortion, THD — %
Supply voltage, VCC — V
0.01
0.1
8
Supply voltage, VCC — V
0
Total harmonic distortion, THD — %
1
6
Total harmonic distortion, THD — %
Output power, PO — W
30
3
2
2
ILA06758
f=1kHz
RL=4Ω
THD=10%
40
10
7
5
3
20
PO — VCC
50
3
2
RL=Open
Rg=0Ω
0
6
10
7
5
VN — VCC
4
RL=Open
Rg=0Ω
Output midpoint voltage, VN — V
Quiescent current, ICCO — mA
350
2
3
5 7 1k
2
3
5 7 10k
Frequency, f — Hz
2
3
5 7 100k
ILA06764
–8
10
2 3
5 7 100
2 3
5 7 1k
2 3
Frequency, f — Hz
5 7 10k
2 3
5 7100k
ILA06765
No.7901-5/7
LA47536
CH. Separation — f
Channel separation — dB
70
60
50
40
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
Frequency, f — Hz
50
40
20
10
2 3
5 7100k
ILA06766
50
40
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
ILA06767
CH. Separation — f
VCC=14.4V
RL=4Ω
Rg=10kΩ
VO=0dBm
(CH4→)
70
Channel separation — dB
60
5 7 100
80
VCC=14.4V
RL=4Ω
Rg=10kΩ
VO=0dBm
(CH3→)
70
2 3
Frequency, f — Hz
CH. Separation — f
80
Channel separation — dB
60
30
20
10
30
60
50
40
30
20
10
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
Frequency, f — Hz
20
10
2 3
5 7100k
ILA06768
0.3
0.2
0.1
0
10
2 3
5 7100
2 3
5 7 1k
2 3
Rg — Ω
5 7 10k
5 7100k
ILA06770
40
2 3
5 7 10k
2 3
5 7100k
ILA06769
60
50
40
30
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
5 7100k
ILA06771
Ripple frequency, fR — Hz
Ripple rejection ratio, SVRR — dB
50
5 7 1k
VCC=14.4V
VCCR=0dBm
Rg=0Ω
RL=4Ω
CVCC=0.1µF
SVRR — VCCR
60
VCCR=0dBm
fR=100Hz
Rg=0Ω
RL=4Ω
CVCC=0.1µF
2 3
SVRR — fR
20
10
2 3
SVRR — VCC
60
5 7 100
70
Ripple rejection ratio, SVRR — dB
VCC=14.4V
RL=4Ω
2 3
Frequency, f — Hz
VNO — Rg
0.4
Output noise voltage, VNO — mV rms
VCC=14.4V
RL=4Ω
Rg=10kΩ
VO=0dBm
(CH2→)
70
30
Ripple rejection ratio, SVRR — dB
CH. Separation — f
80
VCC=14.4V
RL=4Ω
Rg=10kΩ
VO=0dBm
(CH1→)
Channel separation — dB
80
VCC=14.4V
fR=100Hz
Rg=0Ω
RL=4Ω
CVCC=0.1µF
50
SVRR=20log (VCCR / VO)
40
30
30
6
8
10
12
14
16
Supply voltage, VCC — V
18
20
ILA06772
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
Supply ripple voltage, VCCR — V rms
2.0
2.2
ILA06773
No.7901-6/7
LA47536
60
Power dissipation, Pd — W
50
Pd — PO
VCC=14.4V
f=1kHz
RL=4Ω
With 4 channels operating
40
30
20
10
0
0.1
Pd=VCC × ICC -- 4PO
2
3
5
7 1.0
2
3
5
7 10
Output power, PO — W
2
3
5
ILA06774
Specifications of any and all SANYO 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 Electric 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 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 expor ted without obtaining the expor t license from the author ities
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 Electric 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 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 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 April, 2004. Specifications and information herein are subject to
change without notice.
PS No.7901-7/7