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.
Recommended Operating Ranges
at Ta = 25C
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
8 to 16
Unit
V
V
Electrical Characteristics
at Ta = 25°C, VCC = 14.4V, RL = 4, f = 1kHz, Rg = 600
Ratings
Parameter
Quiescent current
Standby current
Voltage gain
Voltage gain difference
Output power
Symbol
ICCO
Ist
VG
VG
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%
Max Power
VCC = 15.2, Max Power
Rg = 0
PO = 4W
VO = 0dBm, Rg = 10k
Rg = 0, fr = 100Hz, VCCR = 0dBm
Rg = 0, B.P.F. = 20Hz to 20kHz
40
75
2.5
0.0
Open
1.0
55
50
-100
0.03
65
65
80
50
90
VCC
0.5
150
65
Conditions
min
RL =
,
Rg = 0
Vst = 0V
VO = 0dBm
25
-1
24
29
45
50
+100
0.12
26
typ
200
max
400
3
27
+1
mA
A
dB
dB
W
W
W
mV
%
dB
dB
Vrms
k
dB
V
V
-
V
Unit
No.A1838-2/10
LV47011P
Package Dimensions
unit : mm (typ)
3236A
29.2
25.6
70
Pd max -- Ta
(8.5)
( 2.5)
4.5
Maximum power dissipation, Pd max -- W
(22.8)
60
(5.0)
(R1.7)
18.6 max
(14.4)
50
(12.3)
21.7
(11.0)
40
14.5
30
0.4
1
(2.6)
(1.0)
0.52
25
3.5
4.0
4.2
20
10
2.0
2.0
0
-40
-20
0
20
40
60
80
100
120
140
160
Ambient temperature, Ta --
°C
SANYO : HZIP25
Block Diagram
C8
Tab
1
6
VCC1/2
20
VCC3/4
C7 +
VCC
C1
IN1
11
+
-
+
-
9
7
OUT 1+
OUT 1-
RL
Protective
circuit
C2
IN2
12
+
-
DC
+
C6
AC GND
C5
10
Ripple
Filter
+
-
PWR GND1
8
OUT 2+
OUT 2-
RL
5
3
PWR GND2
2
OFFSET
DIAG
R2
5V
16
25
PRE GND
13
Mute
circuit
Mute
22
C9
+
R1 Low Level
Mute ON
C3
IN3
15
+
-
Protective
circuit
+
-
17
19
OUT 3+
OUT 3-
RL
PWR GND3
18
OUT 4+
OUT 4-
RL
C4
IN4
14
+
-
+
-
21
23
STBY
+5V
ST ON
4
Stand by
Switch
PWR GND4
24
No.A1838-3/10
LV47011P
External Components
Part Name
C1 to C5
C6
C7
C8
C9
R1
R2
Recommended Value
0.47F
22F
2200F
0.1F
1F
10k
4.7k
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 pin 22. 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.A1838-4/10
LV47011P
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.
5. Sound quality (low frequencies)
By varying the value of input capacitor, low-frequency characteristic can be improved.
However, it is concerned the shock noise. Please confirm in each set when the capacitance value varies.
6. Pop noise
For pop noise prevention, it is recommended to use the muting function at the same time.
Please turn on the muting function simultaneously with power supply on when the amplifier is turned on. Next, turn
off the muting function after the output DC potential stabilization.
When the amplifier is turn off, turn off the power supply after turning on the muting function.
7. 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 1500pF. (Conditions : Our recommended board, RL = 4)
(2) Board layout
Provide the VCC capacitor of 0.1F 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 2200F 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 (0.1F and 2.2) between BTL outputs
Series connection of CR(0.1F and 2.2) between each output pin and GND.
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