Ordering number : ENA1542
Monolithic Linear IC
LV47002P
Overview
For Car Audio Systems
4-Channel BTL Power Amplifier
The LV47002P is the IC for 4-channel BTL power amplifier that is developed for car audio system.
Pch DMOS in the upper side of the output stage and Nch DMOS in the lower side of the output stage are complimentary.
High power and high quality sound are realized by that.
This IC incorporate various functions (standby switch, muting function, and various protection circuit) necessary for car
audio system. Also, it has a self-diagnosis function.
Functions
•
High output : PO max = 48W (typical) (VCC = 15.2V, f = 1kHz, JEITA max, RL = 4Ω)
: PO max = 28W (typical) (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4Ω)
: PO max = 21W (typical) (VCC = 14.4V, f = 1kHz, THD = 1%, RL = 4Ω)
•
Built-in muting function (pin 22)
•
Built-in Standby switch (pin 4)
•
Built-in Self-diagnosis function (pin 25) :
Signal output in case of output offset detection, shorting to VCC, shorting to ground, and load shorting.
•
Electric mirror noise decrease
•
Built-in various protection circuit (shorting to ground, shorting to VCC, load shorting, over voltage and thermal shut
down)
•
No external anti-oscillation part necessary.
Note 1 : Please do not mistake connection.
A wrong connection may produce destruction, deterioration and damage for the IC or equipment.
Note 2 : The protective circuit function is provided to temporarily avoid abnormal state such as incorrect output connection.
But, there is no guarantee that the IC is not destroyed by the accident.
The protective function do not operate of the operation guarantee range. If the outputs are connected incorrectly, IC
destruction may occur when used outside of the operation guarantee range.
Note 3 : External parts, such as the anti-oscillation part, may become necessary depending on the set condition. Check their
necessity for each set.
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.
82609 SY PC 20090717-S00002 No.A1542-1/9
LV47002P
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
VCC max1
VCC max2
Maximum output current
Allowable power dissipation
Operating temperature
Storage temperature
Thermal resistance between the junction
and case
IO peak
Pd max
Topr
Tstg
θj-c
Conditions
No signal, t = 1 minute
During operations
Per channel
With an infinity heat sink
Ratings
26
18
4.5/ch
50
-40 to +85
-40 to +150
1
Unit
V
V
A
W
°C
°C
°C/W
Recommended Operating Ranges
at Ta = 25°C
Parameter
Recommended supply voltage
Recommended load resistance
Operating supply voltage range
Symbol
VCC
RL op
VCC op
A range not exceeding Pdmax
Conditions
Ratings
14.4
4
9 to 16
Unit
V
Ω
V
Electrical Characteristics
at Ta = 25°C, VCC = 14.4V, RL = 4Ω, f = 1kHz, Rg = 600Ω
Parameter
Quiescent current
Standby current
Voltage gain
Voltage gain difference
Output power
Symbol
ICCO
Ist
VG
ΔVG
PO
PO max1
PO max2
Output offset voltage
Total harmonic distortion
Channel separation
Ripple rejection ratio
Output noise voltage
Input resistance
Mute attenuation
Standby pin control voltage
Vn offset
THD
CHsep
SVRR
VNO
Ri
Matt
Vstby H
Vstby L
Mute pin control voltage
Vmute H
Vmute L
Output offset detection
Detection threshold voltage
* 0dBm = 0.775Vrms
Vosdet
±1.2
±1.8
±2.4
V
VO = 20dBm, mute : on
Amp : on
Amp : off
Mute : off
Mute : on
0.0
THD = 10%
JEITA max
VCC = 15.2, JEITA max
Rg = 0Ω
PO = 4W
VO = 0dBm, Rg = 10kΩ
Rg = 0Ω, fr = 100Hz, VCCR = 0dBm
Rg = 0Ω, B.P.F. = 20Hz to 20kHz
40
75
2.5
0.0
Open
1.5
55
45
-100
0.03
65
65
80
50
90
VCC
0.5
200
65
Conditions
min
RL =
∞,
Rg = 0Ω
Vst = 0V
VO = 0dBm
25
-1
23
28
43
48
+100
0.2
26
Ratings
typ
200
max
400
10
27
+1
mA
μA
dB
dB
W
W
W
mV
%
dB
dB
μVrms
kΩ
dB
V
V
-
V
Unit
No.A1542-2/9
LV47002P
External Components
Part Name
C1 to C5
C6
C7
C8
C9
R1
R2
Recommended Value
0.47μF
22μF
2200μF
0.1μF
1μF
10kΩ
4.7kΩ
Purpose
Cuts DC voltage
Reduces ripples
Reduces pop noise
Ripple filter
Improves oscillation stability
Reduces pop noise
Reduces pop noise
Pull-up resistor
Eliminating power supply ripples
Reducing high-frequency noise
The larger the constant value, the longer the mute ON/OFF time
The larger the constant value, the longer the mute ON/OFF time
Remarks
The larger the constant value, the lower the cut-off frequency
The values of C1 to C5 must be the same
The larger the constant value, the longer the amplifier ON/OFF time
* The components and constant values within the test circuit are used for confirmation of characteristics and are not guarantees that incorrect or trouble will not
occur in application equipment.
Description of Operation
1. Standby switch function (pin 4)
Threshold voltage of the pin 4 is set by about 2VBE.
The amplifier is turned on by the applied voltage of 2.5V or more. Also, the amplifier is turned off by the applied
voltage of 0.5V or less.
STBY
4
10kΩ
30kΩ
Fig1 Standby equivalent circuit
2. Muting function (pin 22)
The muted state is obtained by setting pin 22 to the ground potential, enabling audio muting.
The muting function is turned on by the applied voltage of 1V or less to the resistance of 10kΩ. And the muting
function is turn off when this pin opens.
Also, the time constant of the muting function is determined by external capacitor and resistor constants.
It is concerned with a pop noise in amplifier ON/OFF and mute ON/OFF. After enough examination, please set it.
about
50μA
10kΩ
MUTE
22
200Ω
18kΩ
1μF
+
MUTE
OFF
ON
about
2.5V
Fig2 Mute equivalent circuit
3. ACGND pin (pin 16)
The capacitor of the pin 16 must use the same capacitance value as the input capacitor.
Also, connect to the same PREGND as the input capacitor.
No.A1542-4/9
LV47002P
4. Self-diagnostics function (pin 25)
By detecting the unusual state of the IC, the signal is output to the pin 25.
Also, by controlling the standby switch after the signal of the pin 25 is detected by the microcomputer, the burnout of
the speaker can be prevented.
(1) Shorting to VCC/Shorting to ground : The pin 25 becomes the low level.
(2) Load shorting
: The pin 25 is alternated between the low level and the high level
according to the output signal.
(3) Output offset detection
: when the output offset voltage exceeds the detection threshold voltage,
the pin 25 becomes the low level.
* Note: The output offset abnormality is thought of as the leakage current of the input capacitor.
In addition, the pin 25 has become the NPN open collector output (active low).
The pin 25 must be left open when this function is not used.
5V
OFFSET
DIAG
25
IN
+
AC GND
+
16
+
+
RT
-
-
OUT-
OUT+
Output voltage
Speaker pin
output voltage
+1.8V (typical)
0V
-1.8V (typical)
25 pin voltage
time
time
Fig3 Self-diagnosis Function Diagram
No.A1542-5/9
嵌入式系统
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