SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Overview
Now, thick-film audio power amplifier ICs are available
with pin-compatibility to permit a single PCB to be
designed and amplifier output capacity changed simply
by installing a hybrid IC. This new series was developed
with this kind of pin-compatibility to ensure integration
between systems everywhere. With this new series of IC,
even changes from 3-channel amplifier to 2-channel
amplifiers is possible using the same PCB. In addition,
this new series of ICs has a 6/3
drive in order to
support the low impedance of modern speakers.
Features
Pin-compatible
STK400-000 series (3-channel, single package)
STK401-000 series (2-channel, single package)
Output load impedance R
L
= 6
/3
supported
New pin arrangement
To simplify input/output pattern layout and minimize
the effects of pattern layout on operational
characteristics, pin assignments are grouped into blocks
consisting of input, output and power systems.
Few external circuits
Compared to those series used until now, capacitors
and boot-strap resistors for external circuits can be
greatly reduced.
Thick Film Hybrid IC
Ordering number : EN4339A
41097HA(OT) No. 4339-1/9
STK400-040
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
AF Power Amplifier (Split Power Supply)
(25 W + 25 W + 25 W min, THD = 0.4%)
[STK400-040]
Package Dimensions
unit: mm
4086A
STK400-040
No. 4339-2/9
Specifications
Absolute Maximum Ratings
at Ta = 25C
Operating Characteristics
at Ta = 25C, R
L
= 6
, Rg = 600
, VG = 40dB, R
L
(non-inductive)
Notes
Use rated power supply for test unless otherwise specified.
When measuring available time for short-circuit and output noise voltage use transformer power supply indicated
below.
Output noise voltage is represented by the peak value rms (VTVM) for mean reading. Use an AC stabilized power
supply (50 Hz) on the primary side to eliminate the effect of AC flicker noise.
Internal Equivalent Circuit
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
36
V
Thermal resistance
j c
Per power transistor
2.1
C/W
Junction temperature
Tj
150
C
Operating substrate temperature
Tc
125
C
Storage temperature range
Tstg
30 to +125
C
Available time for short-circuit
t
s
V
CC
= 25 V, R
L
= 6
, f = 50 Hz, P
O
= 25 W
1
s
Parameter
Symbol
Conditions
min
typ
max
Unit
Quiescent current
I
CCO
V
CC
= 30 V
30
90
150
mA
Output power
P
O
(1)
V
CC
= 25 V, f = 20 Hz to 20 kHz, THD = 0.4%
25
30
W
P
O
(2)
V
CC
= 21 V, f = 1 kHz, THD = 1.0%, R
L
= 3
25
30
W
Total harmonic distortion
THD (1)
V
CC
= 25 V, f = 20 Hz to 20 kHz, P
O
= 1.0 W
0.4
%
THD (2)
V
CC
= 25 V, f = 1 kHz, P
O
= 5.0 W
0.02
%
Frequency response
f
L
, f
H
V
CC
= 25 V, P
O
= 1.0 W,
dB
20 to 50 k
Hz
Input impedance
r
i
V
CC
= 25 V, f = 1 kHz, P
O
= 1.0 W
55
k
Output noise voltage
V
NO
V
CC
= 30 V, Rg = 10 k
1.2
mVrms
Neutral voltage
V
N
V
CC
= 30 V
70
0
+70
mV
+0
3
Specified Transformer Power Supply
(RP-25 Equivalent)
Unit (resistance:
, capacitance:F)
STK400-040
No. 4339-3/9
Pattern Example for PCB used with either 2- or 3-channel Amplifiers.
Sample Application Circuit
Unit (resistance:
, capacitance:F)
Copper (Cu) foil surface
In the STK 401-000 series, pin No.6 corresponds to pin No.1.
Sample Application Circuit
STK 400-000 Series
Unit (resistance:
, capacitance: F)
STK400-040
No. 4339-4/9
Description of External Circuits
C1, 11, 21
For input coupling capacitor. Used for current blocking. When capacitor reactance with low
frequency is increased, the reactance value should be reduced in order to reduce the output
noise from the signal resistance dependent 1/f noise. In response to the popping noise which
occurs when the system power is turned on, C1 and C11 which determine the decay time
constant on the input side are increased while C3, C13 and C23 on the NF side are decreased.
C2, 12, 22
For input filter capacitor. Permits high-region noise reduction by utilizing filter constructed with
R1, R11 and R21.
C3, 13, 23
For NF capacitor. This capacitor determines the decline of the cut-off frequency and is
calculated according to the following equation.
f
L
=
1
2
X C3 (13, 23,) X R3 (13, 23)
For the purpose of achieving voltage gains prior to reduction, it is best that C3, C13 and C23 are
large. However, because the shock noise which occurs when the system power is turned on
tends to increase, values larger than those absolutely necessary should be avoided.
C5, 15, 25
For oscillation prevention capacitor. A Mylar capacitor with temperature and frequency features
is recommended.
C6, 7
For oscillation prevention capacitor. To ensure safe IC functioning, the capacitor should be
installed as close as possible to the IC power pin to reduce power impedance. An electrolytic
capacitor is good.
C8, 9, 28, 29
For decoupling capacitor. Reduces shock noise during power up using decay time constant
circuits with R8, R9, R28 and R29 and eliminates components such as ripples crossing over into
the input side from the power line.
R1, 11, 21
For input filter applied resistor.
R2, 12, 22
For input bias resistor. The input pin is biased to zero potential. Input impedance is mostly
decided with this resistance value.
R3, 13, 23
R4, 14, 24
For resistors to determine voltage gain (VG). We recommend a VG = 40 dB using R3, R13, R23
= 560
and R4, R14 and R24 = 56
. VG adjustments are best performed using R3, R13 and
R23. When using R4, R14 and R24 for such purposes, R4, R14 and R24 should be set to equal
R2, R12 and R22 in order to establish a stable V
N
balance.
R5, 15, 25
For oscillation prevention resistor.
R6, 16, 26
For oscillation prevention resistor. This resistor's electrical output resides in the signal frequency
and is calculated according to the following formula.
P R6 (16, 26) =
(
V
CC
max/
2
)
2
X R6 (16, 26)
1/2
fC5 (15, 25) + R6 (16, 26)
f = output signal frequency upper limit
R8, 9, 28, 29
For ripple filter applied resistor. PO max, ripple rejection and power-up shock noise are modified
according to this value. Set the electrical output of these resistors while keeping in mind the flow
of peak current during recharging to C8, C9, C28 and C29 which function as pre-drive TR control
resistors during load shorts.
L1, 2, 3
For oscillation prevention coil. Compensates pha
se dislocation caused by load capacitors
and ensures stable oscillation.
Series Configuration
V
CC
max1 V
CC
max2
V
CC
1
V
CC
2
STK400-010
10W X 3
STK401-010
10W X 2
--
27
18
14
STK400-020
15W X 3
STK401-020
15W X 2
--
29
20
16
STK400-030
20W X 3
STK401-030
20W X 2
--
34
23
19
STK400-040
25W X 3
STK401-040
25W X 2
--
36
25
21
STK400-050
30W X 3
STK401-050
30W X 2
--
39
26
22
STK400-060
35W X 3
STK401-060
35W X 2
--
41
28
23
STK400-070
40W X 3
STK401-070
40W X 2
0.4
--
44
30
24
STK400-080
45W X 3
STK401-080
45W X 2
--
45
31
25
STK400-090
50W X 3
STK401-090
50W X 2
--
47
32
26
STK400-100
60W X 3
STK401-100
60W X 2
--
51
35
27
STK400-110
70W X 3
STK401-110
70W X 2
56.0
--
38
--
--
--
STK401-120
80W X 2
61.0
--
42
--
--
--
STK401-130
100W X 2
65.0
--
45
--
--
--
STK401-140
120W X 2
74.0
--
51
--
V
CC
max1
R
L
= 6
operation
V
CC
max2
R
L
= 6
to 3
operation
V
CC
1
R
L
= 6
operation
V
CC
2
R
L
= 3
operation
Example of Set Design for Common PCB
Supply voltage
STK400-040
No. 4339-5/9
3ch Amp
IC Name
Fixed
Standard
Output
2ch Amp
IC Name
Fixed
Standard
Output
THD [%]
f = 20 to 20kHz
6-channel amplifier
STK400-000 Series
STK400-000 Series
5-channel amplifier
STK400-000 Series
STK401-000 Series
3-channel amplifier
STK400-000 Series
2-channel amplifier
STK401-000 Series
4-channel amplifier
STK401-000 Series
STK400-040
No. 4339-6/9
External Circuit Diagram
Heat Radiation Design Considerations
The radiator thermal resistance
c-a required for total substrate power dissipation Pd in the STK400-040 is determined as:
Condition 1: IC substrate temperature Tc not to exceed 125C.
Pd
x
c-a+Ta <125C (1)
where Ta is set assured ambient temperature.
Condition 2: Power transistor junction temperature Tj not to exceed 150C.
Pd
x
c-a+Pd/N
x
j-c+Ta<150C(2)
where N is the number of power transistors and
j-c the thermal resistance per power transistor chip.
However, power transistor power consumption is Pd equally divided by N units.
Expressions (1) and (2) can be rewritten based on
c-a to yield:
c-a<(125Ta)/Pd (1)'
c-a<(150Ta)/Pd
j-c/N(2)'
The required radiator thermal resistance will satisfy both of these expressions.
From expressions (1)' and (2)', the required radiator thermal resistance can be determined once the following
specifications are known:
Supply voltage
V
CC
Load resistance
R
L
Assured ambient temperature
Ta
The total substrate power consumption when STK400-040 V
CC
is 25 V and R
L
is 6
, for a continuous sine wave
signal, is a maximum of 63W (Fig. 1). In general, when this sort of continuous signal is used for estimation of power
consumption, the Pd used is 1/10th of P
O
max (slight variation depending on safety standard).
*1 Unnecessary with applications using STK400-010 to STK400-090.
*2 Unnecessary with applications using STK401-010 to STK401-090.
Unit (resistance:
, capacitance:F)
STK400-040
No. 4339-7/9
Pd = 38W (1/10 P
O
max = during 2.5W)
Total substrate power dissipation (3-channel drive), Pd W
Total harmonic distortion, THD %
Total substrate power dissipation (3-channel drive), Pd W
Total harmonic distortion, THD %
Output power per single channel, P
O
/ch W
Output power per single channel, P
O
/ch W
Output power, P
O
W
Output power, P
O
W
3-channels driven
simultaneously
3-channels driven
simultaneously
Figure 1
Figure 2
STK400-040
No. 4339-8/9
Output power, P
O
W
Output power, P
O
W
Open loop gain, VG dB
Closed loop gain, VG dB
Quiescent current, I
CCO
mA
Quiescent current, I
CCO
mA
Neutral voltage, V
N
mV
Neutral voltage, V
N
mV
Output power, P
O
W
Input voltage, Vin mVrms
Frequency, f Hz
Frequency, f Hz
Frequency, f Hz
Substrate temperature, T
c
C
Supply voltage, V
CC
V
Supply voltage, V
CC
V
STK400-040
No. 4339-9/9
This catalog provides information as of April, 1997. Specifications and information herein are subject to change
without notice.
s
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.
s
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
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:
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.
s
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.
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