Ordering number : ENN7047
Thick-Film Hybrid IC
STK402-070
Two-Channel Class AB Audio Power Amplifier IC
40W + 40W
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.
Package Dimensions
unit: mm
4189-SIP15
[STK402-070]
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
Ω
• Allowable load shorted time: 0.3 seconds
• Supports the use of standby, muting, and load shorting
protection circuits.
SANYO: SIP15
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.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
92801RM (OT) No. 7047-1/6
STK402-070
Series Organization
These products are organized as a series based on their output capacity.
Item
Output 1 (10%/1 kHz)
Type No.
STK402-020
20 W + 20 W
STK402-030
STK402-040
STK402-050
45 W +45 W
30 W + 30 W
±40 V
±38 V
±26.5 V
STK402-070
STK402-090
STK402-100
STK402-120
30 W + 30 W 40 W + 40 W
20 W + 20 W 25 W + 25 W
±34 V
±32 V
±22 V
±38 V
±36 V
±25 V
60 W + 60 W 80 W + 80 W 100 W + 100 W 120 W + 120 W
40 W + 40 W 50 W + 50 W
±50 V
±44 V
±30 V
±54 V
±47 V
±32 V
60 W + 60 W 80 W + 80 W
±57 V
±50 V
±35 V
±65 V
±57 V
±39 V
Output 2 (0.4%/20 Hz to 20 kHz) 15 W + 15 W
Maximum supply voltage
(No signal)
Maximum supply voltage
(6
Ω)
Recommended supply voltage
(6
Ω)
Package
±30 V
±28 V
±19 V
46.6 mm
×
25.5 mm
×
8.5 mm
59.2 mm
×
31.0 mm
×
8.5 mm
Specifications
Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage (No signal)
Maximum supply voltage
Thermal resistance
Junction temperature
Operating IC substrate temperature
Storage temperature
Allowable load shorted time
Symbol
V
CC
max(0)
V
CC
max(1) R
L
= 6
Ω
θj-c
Tj max
Tc max
Tstg
ts
V
CC
= ±30.0 V, R
L
= 6
Ω,
f = 50 Hz, P
O
= 40 W
Per power transistor
Both the Tj max and the Tc max conditions must be met.
Conditions
Ratings
±50
±44
3.2
150
125
–30 to +125
0.3
Unit
V
V
°C/W
°C
°C
°C
s
Operating Characteristics
at Ta = 25°C, R
L
= 6
Ω
(noninductive load), Rg = 600
Ω,
VG = 30 dB
Parameter
Output power
(continuous output)
Total harmonic distortion
Frequency characteristics
Input impedance
Output noise voltage
*
2
Quiescent current
Neutral voltage
Symbol
P
O
(1)
P
O
(2)
THD (1)
THD (2)
f
L
, f
H
ri
V
NO
I
CCO
V
N
Conditions*
1
V
CC
(V)
±30.0
±30.0
±30.0
±30.0
±30.0
±30.0
±36.0
±36.0
±36.0
1k
f (Hz)
20 to 20 k
1k
20 to 20 k
1k
1.0
5.0
1.0
1.0
Rg = 2.2 kΩ
10
–70
40
0
P
O
(W)
THD (%)
0.4
10
VG = 30 dB
VG = 30 dB
+0 –3 dB
0.01
20 to 50 k
55
1.2
80
+70
min
38
Ratings
typ
40
60
0.4
max
Unit
W
%
Hz
kΩ
mVrms
mA
mV
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
10000µF
+VCC
500Ω
500Ω
--VCC
10000µF
Stipulated Transformer Power Supply (MG-200 equivalent)
No. 7047-2/6
STK402-070
Internal Equivalent Circuit
8
4
TR7
R1
TR4
C1
R3
1
2
TR1
TR2
R4
TR8
TR10
R12
R6
TR5
R8
TR12
TR11
C2
R11
TR14
TR15
TR9
R13
R5
TR3
R2
D1
TR6
R7
TR13
R9
R10
TR16
R14
13
SUB
5
12
7
6
10
11
9
14
15
Sample Application Circuit
Ch.1
Ch.2
Ch.1
IN
1
Ch.1
NF
2
Pre
+VCC BIAS
4
5
Ch.1
+VE
6
Ch.1
-VE +VCC -VCC
7
8
9
Ch.2
+VE
10
SUB
Ch.2 Pre
SUB Ch.2 Ch.2
-VE -VCC GND NF
IN
11
12
13
14
15
0.22Ω
0.22Ω
0.22Ω
1kΩ
Ch.1 IN
2.2µF 220pF
0.22Ω
10kΩ
220pF 2.2µF
1kΩ
Ch.2 IN
1.8kΩ
470pF
1.8kΩ
56kΩ
56kΩ
100µF
10µF
33µF
10µF
3µH
Ch.1 OUT
33µF
100Ω
100Ω
100µF
3µH
Ch.2 OUT
4.7Ω
0.1µF
4.7Ω
4.7Ω
+VCC
-VCC
4.7Ω
0.1µF
470pF
56kΩ
56kΩ
3pF
3pF
No. 7047-3/6
STK402-070
Thermal Design Example
The thermal resistance,
θc-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 125°C.
Pd
× θc
– a + Ta < 125°C . . . . . . . . . (1)
Ta: Guaranteed ambient temperature for the end product.
Condition 2: The junction temperature, Tj, of each power transistor must not exceed 150°C.
Pd
× θc
– a + Pd/N
× θj
– c + Ta < 150°C . . . . . . . . . (2)
N: Number of power transistors
θc-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
θc-a.
θc
– a < (125 – Ta) /Pd . . . . . . . . . . . . . . . . . . (1)’
θc
– a < (150 – Ta) /Pd –
θj
– 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
Ω,
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 3.2°C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature of 50°C
will be as follows.
From formula (1)’
From formula (2)’
θc
– a < (125 – 50) /42
< 1.78
θc
– a < (150 – 50) /42 – 3.2/4
< 1.58
Therefore, 1.58°C/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. 7047-4/6
STK402-070
Pd — P
O
Total harmonic distortion, THD — %
V
CC
=±30V
R
L
=6Ω
f=1kHz
VG=30dB
Rg=600Ω
2ch drive
(same output rating)
80
Total device power dissipation, Pd — W
70
60
50
40
30
20
10
10
7
5
3
2
1.0
7
5
3
2
0.1
7
5
3
2
0.01
7
5
3
2
THD — P
O
Tc=25°C
V
CC
=±30V
VG=30dB
R
L
=6Ω
Rg=600Ω
20kH
z
1kH
z
20H
0
0.1
2
3
5 7 1.0
2
3
5 7 10
2
3
Output power per channel, P
O
/ ch — W
1.6
5 7 100
ITF02132
0.001
0.1
2
3
5 7 1.0
2
3
5 7 10
2
3
I
CCO
— P
O
R
L
=6Ω
f=1kHz
Rg=600Ω
1ch drive
80
70
60
50
40
30
20
10
0
10
Output power, P
O
— W
P
O
— f
R
L
=6Ω, V
CC
=±30V, THD=10%
5 7 100
ITF02133
Total current consumption, I
CCO
/ ch — A
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Tc=25°C
VG=30dB
Rg=600Ω
Output power, P
O
— W
R
L
=6Ω, V
CC
=±30V, THD=0.4%
0
0.1
2
3
5 7 1.0
2
3
5 7 10
2
3
Output power per channel, P
O
/ ch — W
100
90
80
5 7 100
ITF02134
2 3
5 7 100
2 3
5 7 1k
2 3
5 7 10k
2 3
Frequency, f — Hz
5 7100k
ITF02135
P
O
— V
CC
Tc=25°C
f=1kHz
VG=30dB
R
L
=6Ω
Rg=600Ω
2ch drive
T
=
HD
Output power, P
O
— W
70
60
50
40
30
20
10
0
16
%
10
T
=
HD
%
0.4
18
20
22
24
26
28
30
32
34
36
Supply voltage, V
CC
— V
ITF02136
No. 7047-5/6
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