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 ICs,
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 assignment
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
bootstrap resistors for external circuits can be greatly
reduced.
Package Dimensions
unit: mm
4086A
Thick Film Hybrid IC
D3096HA(OT)/83194TH (OT) 5-3392 No. 4822-1/10
[STK400-290]
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)
(50 W + 50 W + 50W min, THD = 0.08%)
STK400-290
Ordering number : EN4822A
No. 4822-2/10
STK400-290
Operating Characteristics
at Ta = 25C, R
L
= 6
, Rg = 600
, VG = 40 dB, R
L
(non-inductive)
Notes
Use rated power supply for testing unless otherwise specified.
When measuring available time for load 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.
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
47
V
Thermal resistance
j-c
Per power transistor
1.7
C/W
Junction temperature
Tj
150
C
Substrate temperature
Tc
125
C
Storage temperature
Tstg
30 to +125
C
Available time for load short-circuit
t
s
V
CC
= 32 V, R
L
= 6
, f = 50 Hz, P
O
= 50 W
1
s
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Quiescent current
I
CCO
V
CC
= 39 V
30
90
150
mA
P
O
(1)
V
CC
=32 V, f = 20 to 20 kHz,
50
55
W
Output power
THD = 0.08%
P
O
(2)
V
CC
=26 V, f = 1 kHz, THD = 0.2%,
50
55
W
R
L
= 3
Total harmonic distortion
THD (1)
V
CC
=32 V, f = 20 to 20 kHz, P
O
= 1.0 W
0.08
%
THD (2)
V
CC
=32 V, f = 1 kHz, P
O
= 5.0 W
0.007
%
Frequency response
f
L
, f
H
V
CC
=32 V, P
O
= 1.0 W,
dB
20 to 50 k
Hz
Input impedance
r
i
V
CC
=32 V, f = 1 kHz, P
O
= 1.0 W
55
k
Output noise voltage
V
NO
V
CC
=39 V, Rg = 10 k
1.2
mVrms
Neutral voltage
V
N
V
CC
= 39 V
70
0
+70
mV
0
3
Specifications
Absolute Maximum Ratings
at Ta = 25C
Internal Equivalent Circuit
Pattern Example for PCB used with either 2- or 3-channel Amplifiers.
No. 4822-3/10
STK400-290
Sample Application Circuit
Description of External Circuits
No. 4822-4/10
STK400-290
For input coupling capacitor. Used for current blocking. When capacitor reactance with low frequency is increased, the reactance
C1, 11, 21
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.
For NF capacitor. This capacitor determines the decline of the cutoff frequency and is calculated according to the following
equation.
C3, 13, 23
f
L
=
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
For resistors to determine voltage gain (VG). We recommend a VG = 40 dB using R3, R13, R23 = 560
and R4, R14 and R24 =
R4, 14, 24
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.
For oscillation prevention resistor. This resistor's electrical output resides in the signal frequency and is calculated according to the
following formula.
R6, 16, 26
f = output signal frequency upper limit
For ripple filter applied resistor. P
O
max, ripple rejection and power-up shock noise are modified according to this value. Set the
R8, 9, 28, 29
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 phase dislocation caused by load capacitors and ensures stable oscillation.
1
2
C3 (13, 23)
R3 (13, 23)
P R6 (16, 26) =
2
R6 (16, 26)
1/2
fC5 (15, 25) + R6 (16, 26)
(
)
V
CC
max/
2
Series Configuration
No. 4822-5/10
STK400-290
STK400-000, STK400-200 series
STK401-000, STK401-200 series (2 ch)
Supply voltage (V)
(3 ch simultaneous)
THD
THD
Fixed
THD
THD
Fixed
Type No.
(%)
Type No.
(%)
standard
Type No.
(%)
Type No.
(%)
standard
V
CC
max1
V
CC
max2
V
CC
1
V
CC
2
output
output
STK400-010
STK400-210
10 W
3
STK401-010
STK401-210
10 W
2
--
26.0
17.5
14.0
STK400-020
STK400-220
15 W
3
STK401-020
STK401-220
15 W
2
--
29.0
20.0
16.0
STK400-030
STK400-230
20 W
3
STK401-030
STK401-230
20 W
2
--
34.0
23.0
19.0
STK400-040
STK400-240
25 W
3
STK401-040
STK401-240
25 W
2
--
36.0
25.0
21.0
STK400-050
STK400-250
30 W
3
STK401-050
STK401-250
30 W
2
--
39.0
26.0
22.0
STK400-060
STK400-260
35 W
3
STK401-060
STK401-260
35 W
2
--
41.0
28.0
23.0
STK400-070
0.4
STK400-270
0.08
40 W
3
STK401-070
0.4
STK401-270
0.08
40 W
2
--
44.0
30.0
24.0
STK400-080
STK400-280
45 W
3
STK401-080
STK401-280
45 W
2
--
45.0
31.0
25.0
STK400-090
STK400-290
50 W
3
STK401-090
STK401-290
50 W
2
--
47.0
32.0
26.0
STK400-100
STK400-300
60 W
3
STK401-100
STK401-300
60 W
2
--
51.0
35.0
27.0
STK400-110
STK400-310
70 W
3
STK401-110
STK401-310
70 W
2
56.0
--
38.0
--
STK401-120
STK401-320
80 W
2
61.0
--
42.0
--
STK401-130
STK401-330
100 W
2
65.0
--
45.0
--
STK401-140
STK401-340
120 W
2
74.0
--
51.0
--
STK400-400, STK400-600 series
Supply voltage (V)
(3 ch non-simultaneous)
THD
THD
Fixed
Type No.
(%)
Type No.
(%)
standard
V
CC
max1
V
CC
max2
V
CC
1
V
CC
2
output
STK400-450
STK400-650
C ch
30 W
--
39.0
26.0
22.0
L, R ch
15 W
--
29.0
20.0
16.0
STK400-460
STK400-660
C ch
35 W
--
41.0
28.0
23.0
L, R ch
15 W
--
29.0
20.0
16.0
STK400-470
STK400-670
C ch
40 W
--
44.0
30.0
24.0
L, R ch
20 W
--
34.0
23.0
19.0
STK400-480
STK400-680
C ch
45 W
--
45.0
31.0
25.0
L, R ch
20 W
--
34.0
23.0
19.0
STK400-490
0.4
STK400-690
0.08
C ch
50 W
--
47.0
32.0
26.0
L, R ch
25 W
--
36.0
25.0
21.0
STK400-500
STK400-700
C ch
60 W
--
51.0
35.0
27.0
L, R ch
30 W
--
39.0
26.0
22.0
STK400-510
STK400-710
C ch
70 W
56.0
--
38.0
--
L, R ch
35 W
--
41.0
28.0
23.0
STK400-520
STK400-720
C ch
80 W
61.0
--
42.0
--
L, R ch
40 W
--
44.0
30.0
24.0
STK400-530
STK400-730
C ch
100 W
65.0
--
45.0
--
L, R ch
50 W
--
47.0
32.0
26.0
V
CC
max1
R
L
= 6
V
CC
max2
R
L
= 3
to 6
operation
V
CC
1
R
L
= 6
operation
V
CC
2
R
L
= 3
operation
Example of Set Design for Common PCB
No. 4822-6/10
STK400-290
External Circuit Diagram
Heat Radiation Design Considerations
The radiator thermal resistance
c-a required for total substrate power dissipation Pd in the STK400-290 is determined as:
Condition 1: IC substrate temperature Tc not to exceed 125C.
Pd
c-a + Ta < 125C (1)
where Ta is the assured ambient temperature.
Condition 2: Power transistor junction temperature Tj not to exceed 150C.
Pd
c-a + Pd/N
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 STK400-290 V
CC
is 32 V and R
L
is 6
, for a continuous sine wave
signal, is a maximum of 105 W (Figure. 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).
Pd = 66.5 W (1/10 P
O
max=during 5 W)
No. 4822-7/10
STK400-290
The STK400-290 has six power transistors, so the thermal resistance per transistor
j-c is 1.7C / W. With an assured
ambient temperature Ta of 50C, the required radiator thermal resistance
c-a would be:
From expression (1)'
c-a < (12550)/66.5
< 1.12
From expression (2)'
c-a < (15050)/66.5 1.7/6
< 1.22
To satisfy both, 1.12C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - P
O
when the V
CC
of STK400-290 is 26 V and R
L
is functioning at 3
.
Pd = 76 W (1/10 P
O
max = during 5 W)
From expression (1)'
c-a < (12550)/76
< 0.98
From expression (2)'
c-a < (150-50)/76-1.7/6
< 1.03
To satisfy both, 0.98C / W is the required radiator thermal resistance. This design example is based on a fixed voltage
supply, and will require verification within your specific set environment.
No. 4822-8/10
STK400-290
No. 4822-9/10
STK400-290
No. 4822-10/10
STK400-290
This catalog provides information as of July, 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.
PDF 
ZIP