Datasheet STK402-070 Datasheet (SANYO)

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 3­channel 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: RL= 6 Ω

• 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 W120 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 Ω)
Recommended supply voltage

±19 V ±22 V ±25 V ±26.5 V ±30 V ±32 V ±35 V ±39 V

(6 Ω)

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) RL= 6 Ω ±44 V
Thermal resistance θj-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, RL= 6 Ω, f = 50 Hz, PO= 40 W 0.3 s

Specifications

Maximum Ratings at Ta = 25°C

These products are organized as a series based on their output capacity.

Parameter Symbol

Conditions*

1

Ratings

Unit

V

CC

(V) f (Hz) PO(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 kΩ
Output noise voltage *

2

V

NO

±36.0 Rg = 2.2 kΩ 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 = 25°C, RL= 6 Ω (noninductive load), Rg = 600 Ω, 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

10000µF

10000µF

500Ω

500Ω

+V

CC

--V

CC

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

7125 6

TR5

TR7

TR8

D1

SUB

TR11

TR15

TR13

R14R9

R13

R11

R12

R8

C2

R10

TR16

TR14

11

9

10

8

14 15

TR12

TR9

TR10

Sample Application Circuit

Ch.1INCh.1

NF

Pre

-V

CC

Pre
+V

CC

-V

CC

+V

CC

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

-V

CC

470pF0.1µF

1.8kΩ

56kΩ

10kΩ

0.22Ω

0.22Ω

0.22Ω

0.22Ω

4.7Ω

33µF

3pF

220pF

2.2µF

1kΩ

56kΩ

100µF

10µF

100Ω

3µH

SUB

Ch.2 OUT

4.7Ω

Ch.1 IN

+V

CC

470pF

0.1µF

1.8kΩ

56kΩ

4.7Ω

33µF

3pF

220pF

2.2µF

1kΩ

56kΩ

100µF

10µF

100Ω

3µH

Ch.1 OUT

4.7Ω

Ch.2Ch.1

No. 7047-4/6

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, VCC, is ±30 V and RLis 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 – POcharacteristics.
For the music signals normally handled by audio amplifiers, a value of 1/8 POmax 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 POmax = 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)’ θc – a < (125 – 50) /42

< 1.78

From formula (2)’ 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. 7047-5/6

STK402-070

Pd — P

O

Total device power dissipation, Pd — W

Output power per channel, P

O

/ ch — W

ITF02132

0

1.00.1

80

60

70

50

40

30

20

10

2 3 5 72 3 5 7

10

2 3 5 7

100

VCC=±30V
R

L

=6Ω

f=1kHz
VG=30dB
Rg=600Ω
2ch drive
(same output rating)

PO — V

CC

Output power, P

O

— W

Supply voltage, VCC — V

ITF02136

0

100

80

90

60

70

50

40

30

20

10

24 26 28 3016 18 20 22 32 34 36

THD — P

O

Total harmonic distortion, THD — %

Output power, PO — W

ITF02133

0.001

1.00.1

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 72 3 5 7

10

2 3 5 7

100

Tc=25°C
V

CC

=±30V

VG=30dB
R

L

=6Ω

Rg=600Ω

20kH

20Hz

1kHz

I

CCO

— P

O

Total current consumption, I

CCO

/ ch — A

Output power per channel, P

O

/ ch — W

ITF02134

0

1.00.1

1.6

1.2

1.4

1.0

0.8

0.6

0.4

0.2

2 3 5 72 3 5 7

10

2 3 5 7

100

PO — f

Output power, P

O

— W

Frequency, f — Hz

ITF02135

1k10 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

RL=6Ω
f=1kHz
Rg=600Ω
1ch drive

RL=6Ω, VCC=±30V, THD=10%

RL=6Ω, VCC=±30V, THD=0.4%

Tc=25°C
VG=30dB
Rg=600Ω

Tc=25°C
f=1kHz
VG=30dB
R

L

=6Ω

Rg=600Ω
2ch drive

THD=10%

THD=0.4%

PS No. 7047-6/6

STK402-070

This catalog provides information as of September, 2001. Specifications and information herein are
subject to change without notice.

Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer’s
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer’s products or equipment.

SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.

In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.

No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.

Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification”
for the SANYO product that you intend to use.

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.