Page 1
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.
Thick Film Hybrid IC
2ch AF Power Amplifier (Split Power Supply)
(40W + 40W min, THD = 10%)
Ordering number:ENN5179
STK405-070
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The STK405-070, a member of the STK405-000 series, is
a low-cost, 2-channel audio power amplifier hybr id IC that
is ideal for a wide range of stereo sets. It has dedicated 6Ω
output drive, in contrast with the STK401-000 series which
supports 6Ω/3Ω output drive.
Features
• Class B amplifiers
• Output load impedance R
• EIAJ-output compatible (f=1kHz, THD=10%)
• Low supply switching shock noise
• Pin assignment grouped into individual blocks of
inputs, outputs and supply lines to minimize the
adverse effects of pattern layout on operating characteristics
• External boostrap circuit not necessary
• Standby operation possible using external circuit
• Voltage gain VG=26dB for easy gain distribution within
the set
• Member of 10W/ch to 80W/ch pin-compatible series
Series Organization
The following devices form a series with differing output
capacity. Some of the following devices are under development. Contact your Sanyo sales representative if you require more detailed information.
.oNepyTrewoptuptuO
010-504KTSW01+W010.62±0.41±
030-504KTSW02+W025.03±5.81±
050-504KTSW03+W035.43±0.22±
070-504KTSW04+W040.93±0.52±
090-504KTSW05+W050.24±5.62±
001-504KTSW06+W060.54±0.92±
011-504KTSW07+W070.05±0.13±
021-504KTSW08+W085.25±0.33±
=6Ω support
L
V
CC
]V[egatlovylppuS
xamV
CC
Package Dimensions
unit:mm
4158
[STK405-070]
64.0
55.6
3.6
114
(11.29)
2.54
13×2.54=33.02
0.5
16.5
21.0
31.0
8.5
4.0 25.8
SANYO : SIP14
2.9
0.4
5.5
O3099TH (KT)/O1295HA (ID) No.5179–1/6
Page 2
STK405-070
Specifications
Maximum Ratings at Ta = 25˚C
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egatlovylppusmumixaMV
ecnatsiserlamrehT
erutarepmetnoitcnuJjT 051
erutarepmetgnitarepOcT 521
erutarepmetegarotSgtsT 521+ot03–
tiucric-trohsdaolrofemitelbaliavAt
Operating Characteristics at Ta = 25˚C, RL=6Ω (noninductive load), Rg=600Ω, VG=26dB
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tnerructnecseiuQI
rewoptuptuOP
noitrotsidcinomrahlatoTDHTV
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ecnadepmitupnIr
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egatlovlartueNV
Note.
All tests are measured using a constant-voltage supply unless otherwise specified.
Available time for load short-circuit and output noise voltage are measured using the transformer supply specified below.
The output noise voltage is the peak value of an a verage-reading meter with an rms value scale (VTVM). A regulated AC
supply (50Hz) should be used to eliminate the effects of AC primary line flicker noise.
xam 0.93±V
CC
θ c-j
s
O
Lf,H
N
V
CC
V
OCC
i
ON
CC
V
CC
CC
V
CC
V
CC
V
CC
V
CC
rotsisnartrewopreP 4.3
R,V52±=
6= Ω P,zH05=f,
L
daolon,V0.23±=3102Am
P,zHk1=f,V0.52±=
O
P,V0.52±=
V0.23±=001– 0001+Vm
+0
,W0.1=k05ot02zH
–3
O
P,zHk1=f,V0.52±=
O
k01=gR,V0.23±= Ω 2.1smrVm
W04=1s
O
sgnitaR
nimpytxam
%0.01=DHT,zHk1=f,V0.52±=04W
W0.5=40.01.0%
dB
W0.1=55k
˚C/W
˚C
˚C
˚C
tinU
Ω
Specified Transformer Supply (RP-25 or Equivalent)
No.5179–2/6
Page 3
Block Diagram
Test Circuit
STK405-070
No.5179–3/6
Page 4
STK405-070
Sample Application Circuit (Standby Mode Supported)
Heatsink Design Considerations
The heatsink thermal resistance, θc-a, required to dissipate
the STK405-070 device total power dissipation, Pd, is determined as follows :
Condition 1: IC substrate temperature not to exceed 125°C
Pd×θc-a+Ta<125°C ............................................ (1)
Where Ta is the guaranteed maximum ambient temperature.
Condition 2: Power transistor junction temperature, Tj, not
to exceed 150°C
Pd×θc-a+Pd/N×θj-c+Ta<150°C ......................... (2)
where N is the number of power transistors and θj-c is the
power transistor thermal resistance per transistor . Note that
the power dissipated per transistor is the total, Pd, devided
evenly among the N power transistors.
Expressions (1) and (2) can be rewritten making θc-a the
subject.
θc-a< (125–Ta)/Pd............................................ (1)’
θc-a< (150–Ta)/Pd–θj-c/N................................ (2)’
The heatsink required must have a thermal resistance that
simultaneously satisfied both expressions.
The heatsink thermal resistance can be determined from
(1)’ and (2)’ once the following parameters have been de-
fined.
• Supply voltage : V
• Load resistance : R
CC
L
• Guaranteed maximum ambient temperature : Ta
The total device power dissipation when STK405-070
VCC=±25.0V and RL=6Ω, for a continuous sine wave signal, is a maximum of 42W, as shown in the Pd–P
charac-
O
teristics graph.
When estimating the power dissipation for an actual audio
signal input, the rule of thumb is to select Pd corresponding to 1/10 P
max (within safe limits) for a continuous
O
sine wave input. For example,
Pd=29W [for 1/10 P
max=4W]
O
The STK405-070 has 4 power transistors, and the thermal
resistance per transistor, θj-c, is 3.4°C/W. If the gr aranteed
maximum ambient temperature, Ta, is 50°C, then the required heatsink thermal resistance, θc-a, is :
No.5179–4/6
Page 5
STK405-070
From expression (1)’ : θc-a < (125–50)/29
< 2.58
From expression (2)’ : θc-a < (150–50)/29–3.4/4
< 2.59
Therefore, to satisfy both expressions, the required heatsink
must have a thermal resistance less than 2.58°C/W.
The heatsink design example is based on a constant-voltage supply, and should be verified within your specific set
environment.
No.5179–5/6
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STK405-070
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.
This catalog provides information as of October, 1999. Specifications and information herein are subject
to change without notice.
PS No.5179–6/6
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