SANYO LA4183

Ordering number: EN887B
Monolithic Linear IC
LA4183
2.3 W 2-Channel AF Power Amplifier for Radio
Cassette Players
Features
Package Dimensions
. Built-in 2 channels enabling use in stereo and bridge
(BTL) applications.
. amplifier
High-output:
.
.
.
.
.
.
.
unit : mm
3022A-DIP12F
2.3 W typ./channel, VCC = 9 V, RL = 4 Ω
4.7 W typ./bridge amplifier, VCC = 9 V, RL = 8 Ω
Low switching distortion at high frequencies.
Minimum number of external parts required: 9 pcs. min.
(Stereo/bridge).
Small shock noise at the time of power supply ON/OFF due
to built-in muting circuit.
Good ripple rejection due to built-in ripple filter.
Soft tone at the time of output saturation.
Good channel separation.
Voltage gain fixed at 45 dB (Bridge: 51 dB).
Variable voltage gain available with external resistor added.
[LA4183]
SANYO : DIP12F
Note:
In general applications, heat generated in the DIP 12-pin
package can be radiated through the Cu-foiled area of the
printed circuit board, but since power dissipation Pd may be
increased depending on the supply voltage and load conditions,
it is recommended to use a fin additionally.
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Symbol
VCC max
Pd max
Conditions
Ratings
Unit
With signal
11
V
Quiescent
15
V
4
W
With printed circuit board
(Refer to Pd – Ta characteristics)
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Recommended supply voltage
Load resistance
Symbol
Conditions
VCC
RL
9.0
V
Stereo
4.0 to 8.0
Ω
Bridge
8.0
Ω
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
53096HA(II)/O0207TA/2022KI,TS,ID No.887-1/11
LA4183
Operating Characteristics at Ta = 25°C, VCC = 9.0 V, f = 1 kHz, Rg = 600 Ω, RL = 4 Ω, (
See specified Test Circuit.
Parameter
Quiescent current
Voltage gain
Symbol
ICCO
VG
Voltage gain difference
Output power
Input resistance
THD
min
THD = 10%
Stereo
Bridge
Stereo
Stereo
PO = 250 mW
Bridge
Stereo
Bridge
Rg
Rg
Rg
Rg
Stereo
Stereo
Stereo
Stereo
ri
Output noise voltage
VNO
Ripple rejection ratio
Channel separation
—
CHsep
Allowable power dissipation, Pd max – W
Closed loop, VIN = –45 dB
∆VG
PO
Total harmonic distortion
Conditions
For stereo
43
49
1.7
21
=
=
=
=
0
10 kΩ
0, Vr = 150 mV
10 kΩ, VO = 0 dBm
40
40
typ
40
45
51
2.3
(1.3)
(4.7)
0.3
0.5
30
0.3
0.5
46
55
): 8 Ω,
max
55
47
53
±1
1.5
1.0
2.0
Unit
mA
dB
dB
dB
W
W
W
%
%
kΩ
mV
mV
dB
dB
Pd max – Ta
Cu plate (fin 1)
Fe plate (fin 1)
Fe plate (fin 2)
Recommended
printed circuit
board only
Cu-foiled area
reduced board
IC only
Ambient temperature, Ta – °C
Pin Assignment and Equivalent Circuit
No.887-2/11
LA4183
Sample Application Circuit 1: Stereo amplifier
Sample Application Circuit 2: Bridge amplifier
Example of printed circuit pattern
(Cu-foiled area) for use in stereo, bridge amplifier applications
60 × 80 mm2
C7
OUT1
C3
100µF
/16V
IN1
C2
LA4183
100µF
/16V
IN2
6
C9
100µF/16V
100µF/16V
BTL use
C5
0.15µF
12
7
C1
100µF/16V
470µF
/16V V
CC
GND
C10
1000µF
jumper
/16V
2ch stereo use
1
C6
0.15µF
C4
100µF/16V
BTL OUT
OUT2
C8
470µF/16V
No.887-3/11
LA4183
Description of External Parts
C1 (C2)
Feedback capacitor
The low-range cut-off frequency is determined by the following formula:
fL = 1 / (2 π C1vRf), fL: Low-range cut-off frequency
Rf: Feedback resistor
(50 Ω embedded + Rf externally connected)
The frequency, however, affects the starting time in conjuction with
decoupling capacitors. Therefore, it is necessary to determine it after a
full review of the required low-frequency range and other similar
conditions.
C3 (C4)
Bootstrap capacitor
The output at low frequencies depends on this capacitor. If the capacity
is decreased, the output at low frequencies goes lower. 47 µF min. is
required.
C5 (C6)
Oscillation preventing capacitor
Use polyester film capacitor which is good in temperature characteristic
and frequency characteristic. Aluminum electrolytic capacitor or
ceramic capacitor causes oscillation at low temperatures.
C7 (C8)
Output capacitor
The low-range cut-off frequency is determined by the following formula.
fL = 1 / (2π C7vRL), fL: Low-range cut-off frequency
RL:Load resistance
When using bridge-connected, double the capacitance to obtain
equivalent low-range frequency characteristics to those in a 2-channel
application.
C9
Decoupling capacitor
Used for the ripple filter. Since the rejection effect is saturated at a
certain capacity, it is meaningless to increase the capacity more than
needed.
This capacitor, being also used for the time constant of the muting
circuit, affects the starting time.
C10
Power source capacitor
Application Circuits
1.
Voltage gain adjustment
. Stereo
The voltage gain depends on built-in-resistors R1 (R2), R3 (R4) as follows:
R3 (R4)
[dB]
R1 (R2)
If the IC is used at a voltage gain less than this, the following
equation with Rf added applies.
VG = 20 log
VG = 20 log
R3 (R4)
[dB]
R1 (R2) + Rf
where R1 (R2) = 50 Ω typ.,
R3 (R4) = 10 kΩ typ.
. Bridge
The following shows the bridge amplifier configuration, where ch1 operates as a non-inverting amplifier and ch2 as an inverting
amplifier.
No.887-4/11
LA4183
The output of ch1 is divided with R5, R6 and led to pin 1 and then inputted to ch2. Since the attenuation degree (R5/R6) of ch1
output and the amplification degree (R4/R2 + R6)) of ch2 are fixed at an equal value, the ch2 output is in opposite phase with the
ch1 output. Therefore, the total voltage gain gets apparently 6 dB higher than the voltage gain of ch1 alone and is determined by
the following equation.
R3
+ 6 [dB]
R1
If the IC is used at a voltage gain less than this, the following equation with Rf added applies.
VG = 20 log
VG = 20 log
2.
R3
R1 + Rf
+ 6 [dB]
Starting time
Starting time depends on capacitance of C1 (C2) and C9 as shown in the diagram below. That is because of using a muting circuit
utilizing the C9 (decoupling capacitor) time constant for pop noise prevention when power is turned on and charging circuits for
C1 and C2 (NF capacitors).
Quiescent
Dependence on C9
Quiescent
Dependence on C1 (C2)
3.
Crosstalk
Channel separation characteristic is important for single-package IC embodying two channels.
With LA4183, good channel separation is obtainable even as is, but if the BTL OUT pin (pin 1) is not grounded, it will invite
imbalance in crosstalk between the two channels. (Refer to the characteristics diagram.)
No.887-5/11
LA4183
Proper Cares in Operating a Set with LA4183 Incorporated
When a set with the LA4183 incorporated is operated from AC power supply, a momentary drop in supply voltage is caused by
the transformer regulation, etc. at the time of turning ON the motor with the circuit shown below. In this case, if ripple noise is
generated from the speaker or headphone, take the following actions.
1.
2.
Connect a diode (rectifier diode of average rectified current IO = 100 to 200 mA) across pins 6 and 12 of the LA4183 so that
the voltage at pin 6 can follow the supply voltage regulation. In the steady state, this diode is cut off.
Increase the capacity of the power source capacitor so that the supply voltage regulation can be minimized.
Radiation Design
. Since the DIP 12-pin package is so designed as to be able to radiate heat through the Cu-foiled area of printed circuit board
.
.
.
under normal operating conditions, make the Cu-foiled area near the fin of IC as large as possible when designing the printed
circuit board.
By providing the Cu-foiled area covered by the broken line as shown in the above-mentioned example of printed circuit pattern,
a rather satisfactory radiation is enabled. (Refer to the Pd − Ta characteristics.)
Since the power dissipation (Pd) goes higher depending on the conditions of supply voltage and load, it is recommended to use
the fin together with the printed circuit board.
The following equations are rule-of-thumb guides for Pd (for stereo). For AC power supply, it is desirable to measure with the
transformer of each individual set. In the bridge amplifier application, calculation should be made with 1/2 of the load used.
(1) DC Power supply
VCC2
Pd max = π2R + ICCO v VCC (For stereo)
L
(2) AC power supply
VCC (Pd)2
+ ICCO v VCC (Pd) (For stereo)
Pd max =
π2RL
VCC2:
Quiescent supply voltage
ICCO:
Quiescent current
VCC (Pd): Supply voltage at Pd max. output,
(1 + r) VCC1
VCC (Pd) =
1+
VCC1:
r v VCC1
√2 v π v RL
×
√
RL
PO max
Supply voltage at max. output
r: Voltage regulation,
VCC2 – VCC1
VCC1
. Example of fin mounting
The fin is formed into such a shape as to be able to radiate heat from the plastic area of IC and the fin as shown below and is
soldered to the printed circuit board. For the fin size, refer to the Pd – Ta characteristics. The desirable material is copper or
iron which is solderable. It is recommended to apply silicone grease, etc. to the plastic area of IC in order to minimize the
thermal resistance.
No.887-6/11
LA4183
Printed circuit board
Example of fin mounting
Fin
IC Usage Notes
1.
If the IC is used in the vicinity of the maximum rating, even a slight variation in conditions may cause the maximum rating
to be exceeded, thereby leading to a breakdown. Allow an ample margin of variation for supply voltage, etc. and use the IC
in the range where the maximum rating is not exceeded.
2.
Pin-to-pin short
If the supply voltage is applied when the space between pins is shorted, a breakdown or deterioration may occur. When
installing the IC on the board or applying the supply voltage, make sure that the space between pins is not shorted with
solder, etc.
3.
Load short
If the IC is used with the load shorted for a long time, a breakdown or deterioration will occur. Be sure not to short the load.
4.
When the IC is used in radios or radio cassette tape recorders, keep a good distance between IC and bar antenna.
5.
When making the board, refer to the example of printed circuit pattern.
No.887-7/11
LA4183
PO – VIN
Response – dB
Output power, PO – W
f response
Frequency, f – Hz
THD – f
(With signal)
(With noise)
(Signal side)
Output noise voltage, VNO – mV
Output ripple voltage, Vrp – mV
Channel Separation, CHsep – dB
VNO (Rg = 0.20 to 20kHz BPF)
Voltage gain, VG – dB
Vrp, VNO – Rg
Frequency, f – Hz
CHsep – f
Frequency, f – Hz
VNO (Rg = 0, no filter)
High cutoff frequency, fH – kHz
Frequency, f – Hz
VNO, THD, fH – VG
Output power, PO – W
THD – f
Total harmonic distortion, THD – %
Output noise voltage, VNO – mV
Total harmonic distortion, THD – %
Total harmonic distortion, THD – %
Total harmonic distortion, THD – %
Input voltage, VIN – mV
THD – PO
Signal source resistance, Rg – Ω
No.887-8/11
LA4183
Vrp – CDC
Output ripple voltage, Vrp – mV
Total harmonic distortion, THD – %
THD – Rg
Signal source resistance, Rg – Ω
Vrp – CNF
Decoupling capacitor capacity, CDC – µF
Vrp – fr
Output ripple voltage, Vrp – mV
Output ripple voltage, Vrp – mV
No difference due to
bootstrap capacitors
47 µF, 100 µF, 200 µF.
Ripplie frequency, fr – Hz
THD – VCC
Total harmonic distortion, THD – %
Voltage gain, VG – dB
Feedback capacitor capacity, CNF – µF
VG – RNF
Measured value
External feedback resistor resistance, RNF – Ω
tS – CDC
Starting time, ts – s
Power ON
Decoupling capacitor capacity, CDC – µF
Supply voltage, VCC – V
Pd – PO
Power dissipation, Pd (Stereo) – W
Output DC waveform
ripple
Using specified fin
Output power, PO – W
No.887-9/11
LA4183
ICC – PO
Using specified fin
Current drain, ICC – mA
Power dissipation, Pd (Stereo) – W
Pd – PO
Output power, PO – W
PO – RL
Load resistance, RL – Ω
ICCO – Ta
Output midpoint voltage, VN – V
Supply voltage, VCC – V
ICCO, VN – VCC
[Bridge]
Ambient temperature, Ta – °C
PO – VIN
Output power, PO – W
Output midpoint voltage, VN – V
Supply voltage, VCC – V
VN – Ta
Quiescent current, ICCO – mA (Stereo)
Quiescent current, ICCO – mA (Stereo)
Output power, PO – W
Output power, PO – W
Output power, PO – W
PO – VCC
Ambient temperature, Ta – °C
Input voltage, VIN – mV
No.887-10/11
LA4183
f response
Response – dB
Total harmonic distortion, THD – %
THD – PO
Output power, PO – W
Pd – PO
Power dissipation, Pd – W
Total harmonic distortion, THD – %
Frequency, f – Hz
THD – f
Output power, PO – W
PO – VCC
Output power, PO – W
Current drain, ICC – mA
Frequency, f – Hz
ICC – PO
Using specified fin
Output power, PO – W
Supply voltage, VCC – V
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
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 May, 1996. Specifications and information herein are subject to change without notice.
No.887-11/11