Ordering number : ENN7047
92801RM (OT) No. 7047-1/6
Overview
The STK402-000 series products are audio power
amplifier hybrid ICs that consist of optimally-designed
discrete component power amplifier circuits that have
been miniaturized using SANYO's unique insulated metal
substrate technology (IMST). SANYO has adopted a new
low thermal resistance substrate in these products to
reduce the package size by about 60% as compared to the
earlier SANYO STK407-000 series.
Features
Series of pin compatible power amplifiers ranging from
20 W
2 channels to 120 W
2 channel (10%/1 kHz)
devices. The same printed circuit board can be used
depending on the output power grade.
The pin arrangement is compatible with that of the 3-
channel STK402-200 series. This means that 3-channel
printed circuit boards can also be used for 2-channel
products.
Miniature packages
-- 15 W/ch to 40 W/ch (THD = 0.4%, f = 20 Hz to
20 kHz); 46.6 mm
25.5 mm
8.5 mm *
-- 50 W/ch to 80 W/ch (THD = 0.4%, f = 20 Hz to
20 kHz); 59.2 mm
31.0 mm
8.5 mm *
*: Not including the pins.
Output load impedance: R
L
= 6
Allowable load shorted time: 0.3 seconds
Supports the use of standby, muting, and load shorting
protection circuits.
Package Dimensions
unit: mm
4189-SIP15
SANYO: SIP15
[STK402-070]
STK402-070
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Two-Channel Class AB Audio Power Amplifier IC
40W + 40W
Thick-Film Hybrid IC
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.
No. 7047-2/6
STK402-070
Item
Type No.
STK402-020
STK402-030
STK402-040
STK402-050
STK402-070
STK402-090
STK402-100
STK402-120
Output 1 (10%/1 kHz)
20 W + 20 W
30 W + 30 W 40 W + 40 W
45 W +45 W
60 W + 60 W
80 W + 80 W 100 W + 100 W 120 W + 120 W
Output 2 (0.4%/20 Hz to 20 kHz) 15 W + 15 W
20 W + 20 W 25 W + 25 W
30 W + 30 W
40 W + 40 W
50 W + 50 W
60 W + 60 W
80 W + 80 W
Maximum supply voltage
30 V
34 V
38 V
40 V
50 V
54 V
57 V
65 V
(No signal)
Maximum supply voltage
28 V
32 V
36 V
38 V
44 V
47 V
50 V
57 V
(6
)
Recommended supply voltage
19 V
22 V
25 V
26.5 V
30 V
32 V
35 V
39 V
(6
)
Package
46.6 mm
25.5 mm
8.5 mm
59.2 mm
31.0 mm
8.5 mm
Series Organization
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage (No signal)
V
CC
max(0)
50
V
Maximum supply voltage
V
CC
max(1) R
L
= 6
44
V
Thermal resistance
j-c
Per power transistor
3.2
C/W
Junction temperature
Tj max
Both the Tj max and the Tc max conditions must be met.
150
C
Operating IC substrate temperature
Tc max
125
C
Storage temperature
Tstg
30 to +125
C
Allowable load shorted time
ts
V
CC
= 30.0 V, R
L
= 6
, f = 50 Hz, P
O
= 40 W
0.3
s
Specifications
Maximum Ratings
at Ta = 25C
These products are organized as a series based on their output capacity.
Parameter
Symbol
Conditions
*
1
Ratings
Unit
V
CC
(V)
f (Hz)
P
O
(W)
THD (%)
min
typ
max
Output power
P
O
(1)
30.0
20 to 20 k
0.4
38
40
W
(continuous output)
P
O
(2)
30.0
1 k
10
60
Total harmonic distortion
THD (1)
30.0
20 to 20 k
1.0
VG = 30 dB
0.4
%
THD (2)
30.0
1 k
5.0
VG = 30 dB
0.01
Frequency characteristics
f
L
, f
H
30.0
1.0
+0 3 dB
20 to 50 k
Hz
Input impedance
ri
30.0
1 k
1.0
55
k
Output noise voltage
*
2
V
NO
36.0
Rg = 2.2 k
1.2
mVrms
Quiescent current
I
CCO
36.0
10
40
80
mA
Neutral voltage
V
N
36.0
70
0
+70
mV
Operating Characteristics
at Ta = 25C, R
L
= 6
(noninductive load), Rg = 600
, VG = 30 dB
Notes: 1. Unless otherwise noted, use a constant-voltage supply for the power supply used during inspection.
2. The output noise voltage values shown are peak values read with a VTVM. However, an AC stabilized (50 Hz) power supply should be used to
minimize the influence of AC primary side flicker noise on the reading.
Use the transformer power supply circuit stipulated in the figure below for output noise voltage measurement.
3. Use the transformer power supply circuit stipulated in the figure below for allowable load shorted time measurement.
DBA40C
10000
F
10000
F
500
500
+VCC
--VCC
Stipulated Transformer Power Supply (MG-200 equivalent)
No. 7047-3/6
STK402-070
Internal Equivalent Circuit
TR4
TR1
TR6
R2
R7
R1
R3
R4
R6
C1
R5
TR3
TR2
1
4
2
13
7
12
5
6
TR5
TR7
TR8
D1
SUB
TR11
TR15
TR13
R14
R9
R13
R11
R12
R8
C2
R10
TR16
TR14
11
9
10
8
14
15
TR12
TR9
TR10
Sample Application Circuit
Ch.1
IN
Ch.1
NF
Pre
-VCC
Pre
+VCC
-VCC
+VCC
BIAS
Ch.2
+VE
Ch.2
NF
SUB
GND
Ch.2
IN
Ch.2
-VE
Ch.1
+VE
Ch.1
-VE
1
2
4
5
6
7
8
9
10
11
12
13
14
15
Ch.2 IN
-VCC
470pF
0.1
F
1.8k
56k
10k
0.22
0.22
0.22
0.22
4.7
33
F
3pF
220pF 2.2
F
1k
56k
100
F
10
F
100
3
H
SUB
Ch.2 OUT
4.7
Ch.1 IN
+VCC
470pF
0.1
F
1.8k
56k
4.7
33
F
3pF
220pF
2.2
F
1k
56k
100
F
10
F
100
3
H
Ch.1 OUT
4.7
Ch.2
Ch.1
No. 7047-4/6
STK402-070
Thermal Design Example
The thermal resistance,
c-a of the required heat sink for the power dissipation, Pd, within the hybrid IC is determined as
follows.
Condition 1: The IC substrate temperature, Tc, must not exceed 125C.
Pd
c a + Ta < 125C . . . . . . . . . (1)
Ta: Guaranteed ambient temperature for the end product.
Condition 2: The junction temperature, Tj, of each power transistor must not exceed 150C.
Pd
c a + Pd/N
j c + Ta < 150C . . . . . . . . . (2)
N: Number of power transistors
c-a: Thermal resistance per power transistor
However, the power dissipation, Pd, for the power transistors shall be allocated equally among the N transistors.
The following inequalities results from solving equations (1) and (2) for
c-a.
c a < (125 Ta) /Pd . . . . . . . . . . . . . . . . . . (1)'
c a < (150 Ta) /Pd
j c/N . . . . . . . . . (2)'
Values that satisfy these two inequalities at the same time represent the required heat sink thermal resistance.
When the following specifications have been stipulated, the required heat sink thermal resistance can be determined from
formulas (1)' and (2)'.
Supply voltage -- V
CC
Load resistance value -- RL
Guaranteed ambient temperature -- Ta
[Example]
When the IC supply voltage, V
CC
, is 30 V and R
L
is 6
, the IC internal power dissipation, Pd, will be a maximum of
63 W for a continuous sine wave signal at 1 kHz, according to the Pd P
O
characteristics.
For the music signals normally handled by audio amplifiers, a value of 1/8 P
O
max is generally used for Pd as an estimate
of the power dissipation based on this type of continuous signal. (Note that the factor used may differ depending on the
safety standards used.)
That is:
Pd = 42 W (When 1/8 P
O
max = 5 W)
The number of power transistors in the audio amplifier block of these hybrid ICs, N, is 4, and the thermal resistance per
transistor is 3.2C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature of 50C
will be as follows.
From formula (1)'
c a < (125 50) /42
< 1.78
From formula (2)'
c a < (150 50) /42 3.2/4
< 1.58
Therefore, 1.58C/W is the required heat sink thermal resistance.
Note that this thermal design example assumes the use of a constant-voltage power supply, and is therefore not a verified
design for any particular user's end product.
No. 7047-5/6
STK402-070
Pd -- P
O
T
otal de
vice po
wer dissipation, Pd --
W
Output power per channel, P
O
/ ch -- W
ITF02132
0
1.0
0.1
80
60
70
50
40
30
20
10
2
3
5
7
2
3
5
7
10
2
3
5
7 100
V
CC
=
30V
R
L
=6
f=1kHz
VG=30dB
Rg=600
2ch drive
(same output rating)
P
O
-- V
CC
Output po
wer
, P
O
--
W
Supply voltage, V
CC
-- V
ITF02136
0
100
80
90
60
70
50
40
30
20
10
24
26
28
30
16
18
20
22
32
34
36
THD -- P
O
T
otal harmonic distortion,
THD -- %
Output power, P
O
-- W
ITF02133
0.001
1.0
0.1
0.01
7
5
3
2
0.1
7
5
3
2
1.0
7
5
3
2
10
7
5
3
2
2
3
5
7
2
3
5
7
10
2
3
5
7 100
Tc=25
C
V
CC
=
30V
VG=30dB
R
L
=6
Rg=600
20kH
20Hz
1kHz
I
CCO
-- P
O
T
otal current consumption, I
CCO
/ ch --
A
Output power per channel, P
O
/ ch -- W
ITF02134
0
1.0
0.1
1.6
1.2
1.4
1.0
0.8
0.6
0.4
0.2
2
3
5
7
2
3
5
7
10
2
3
5
7 100
P
O
-- f
Output po
wer
, P
O
--
W
Frequency, f -- Hz
ITF02135
1k
10
100
50
40
30
20
10
0
60
80
70
2 3
5 7
2 3
5 7
2 3
5 7
2 3
5 7
10k
100k
R
L
=6
f=1kHz
Rg=600
1ch drive
R
L
=6
, V
CC
=
30V, THD=10%
R
L
=6
, V
CC
=
30V, THD=0.4%
Tc=25
C
VG=30dB
Rg=600
Tc=25
C
f=1kHz
VG=30dB
R
L
=6
Rg=600
2ch drive
THD=10%
THD=0.4%
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