Ordering number : ENN7245
20703AS (OT) No. 7245-1/4
Overview
The STK412-000 series are class H audio power amplifier
hybrid ICs that feature a built-in Shift power supply
circuit. These ICs provide high efficiency audio power
amplification by controlling (switching) the supply
voltage supplied to the power transistors according to the
detected level of the input audio signal.
Features
• Pin compatible IC series that covers power ratings from
50 W ×2 channels to 180 W ×2 channels at 0.7 or 0.8%
THD, 20 Hz to 20 kHz. This allows the use of a
common PCB for all output classes.
• The pin arrangement is also unified with that of the
three-channel STK413-000 series. This means that PCBs
designed for three-channel models can also be used for
two-channel models.
• Miniature package
— 50 W/ch to 120 W/ch (THD = 0.8%, f = 20 Hz to 20
kHz): 64 ×36.5×8.5 mm*
— 150 W/ch to 180 W/ch (THD = 0.7%, f = 20 Hz to
20 kHz): 78 ×44×9 mm*
* Not including the IC pins.
• Allowable load shorted time: 0.3 s
Package Dimensions
unit: mm
4196-SIP18
118
64.0
55.6
18.7
36.5
(6.21) 17
×
2.54=43.18
3.6
0.5
2.54
8.5
4.0
0.4
5.5
25.8
2.9
SANYO: SIP18
[STK412-010]
STK412-010
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Two-Channel Shift Power Supply Audio Power Amplifier ICs
70W + 70 W
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. 7245-2/4
STK412-010
Parameter Type No.
STK412-090 STK412-000 STK412-010 STK412-020 STK412-030 STK412-040 STK412-150 STK412-170
Output (20 Hz to 20 kHz) 50 W + 50 W 60 W + 60 W 70 W + 70 W 80 W +80 W
100 W + 100 W120 W + 120 W 150 W + 150 W180 W + 180 W
[THD] [0.8 %] [0.8 %] [0.8 %] [0.8 %] [0.8 %] [0.8 %] [0.7 %] [0.7 %]
Maximum supply voltage, VH±60 V ±65 V ±69 V ±73 V ±80 V ±84 V ±95 V ±95 V
(No signal)
Maximum supply voltage, VL±41 V ±42 V ±44 V ±45 V ±46 V ±51 V ±61 V ±60 V
(No signal)
Recommended supply voltage, ±37 V ±39 V ±43 V ±45 V ±51 V ±54 V ±57 V ±54 V
VH
Recommended supply voltage, ±27 V ±29 V ±30 V ±32 V ±34 V ±36 V ±38 V ±37 V
VL
Recommended load impedance
8 Ω6 Ω4 Ω
Package 64 mm ×36.5 mm ×8.5 mm 78 mm ×44 mm ×9 mm
Series Organization
Parameter Symbol Conditions Ratings Unit
VH: Maximum supply voltage 1 (no signal) VH max(1) ±69 V
VH: Maximum supply voltage 2 (signal present) VH max(2) RL= 8, 6 Ω±62 V
VH: Maximum supply voltage 3 (signal present) VH max(3) RL= 4 Ω±49 V
VL: Maximum supply voltage 1 (no signal) VL max(1) ±44 V
VL: Maximum supply voltage 2 (signal present) VL max(2) RL= 8, 6 Ω±40 V
VL: Maximum supply voltage 3 (signal present) VL max(3) RL= 4 Ω±30 V
VH-VL: Maximum supply voltage *4VH-L max No load 60 V
Thermal resistance θj-c Per power transistor 1.9 °C/W
Junction temperature Tj max Both the Tjmax and Tcmax 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 *3ts VH= ±43 V, VL= ±30 V, RL= 8 Ω, f = 50 Hz, PO= 70 W, 0.3 s
one channel operating
Specifications
Maximum Ratings at Ta = 25°C
These products are organized into a series based on their output power.
Parameter Symbol Test conditions *1Standard value Unit
VCC (V) f (Hz) PO(W) THD (%) min typ max
PO(1) VH= ±43 20 to 20 k 0.8 70 W
Output power VL= ±30
PO(2) VH= ±34 1 k 0.8 RL= 4 Ω70 W
VL= ±25
Total harmonic distortion THD VH= ±43 20 to 20 k 70 0.4 %
VL= ±30
Frequency characteristics fL, fHVH= ±43 1.0 +0 –3 dB
20 to 50 k
Hz
VL= ±30
Input impedance ri VH= ±43 1 k 1.0 55 kΩ
VL= ±30
Output noise voltage *2VNO VH= ±52 Rg = 2.2 kΩ1.0 mVrms
VL= ±34
Quiescent current ICCO VH= ±52 No load 30 mA
VL= ±34 No load 100 mA
Midpoint voltage VNVH= ±52 –70 0 +70 mV
VL= ±34
Operating Characteristics at Ta = 25°C, RL= 8 Ω, Rg = 600 Ω, VG = 40 dB, VZ= 15 V, RLmust be a non-
inductive load.
Notes: *1. Unless otherwise specified, a constant-voltage power supply must be used during inspection.
*2. The output noise voltage rating gives the peak value read by an averaging VTVM. However, to eliminate the influence of flicker noise from the AC
primary side line, use an AC stabilized power supply (50 Hz).
No. 7245-3/4
STK412-010
Internal Equivalent Circuit
TR3
TR6
TR2TR1
R2
TR7
R7
R3
C2
C1
R6
R1
TR5
TR4
13
15
9
16
12
8 11 10 17 18
TR9
TR10
R4
R5
TR8
D1
D2
TR13
TR16
TR12 TR11
TR41
R12
R41
R13
R14
R15
C12 C11
TR17
R17
R16
R11
TR15
TR51
TR14
TR18
TR19
TR20
D12
D41
D51
D53
D52
D42
D43
1
2
5
4
6
14
Comparator
R51
Comparator
3
SUB
7
10000µF
10000µF
DBA40C
500Ω
500Ω
+VH
--VH
+
+
10000µF
10000µF
DBA40C
500Ω
500Ω
+VL
--VL
+
+
Specified Transformer Power Supply
(MG-250 equivalent) Specified Transformer Power Supply
(MG-200 equivalent)
*3. Use the transformer power supply specified in the figure below for allowable load shorted time and output noise voltage measurements.
*4. Design circuits so that (|VH| - |VL|) is always less than 40 V when switching the power supply with the load connected.
*5. Set up the VLpower supply with an offset voltage at power supply switching (VL- LO) of about 8 V as an initial target.
PS No. 7245-4/4
STK412-010
This catalog provides information as of February, 2003. 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.
Sample Application Circuit
33kΩ
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
STK412-000 Series
GND
GND
560Ω
100µF
/100V
100µF
/100V
100µF
/50V
100µF
/50V
100µF
/63V
100µF
/63V
2.2µF
/50V
2.2µF
/50V
470pF
100pF 100pF
470pF
0.1µF
560Ω
100µF
/10V 100µF
/10V
3pF
*1*1*1*1
56kΩ
1.5kΩ
/1W
1.5kΩ
/1W
GZA
15X GZA
15X
100Ω
/1W
100Ω
/1W
3pF
56kΩ
1kΩ
1kΩ
Ch.2 IN
56kΩ
56kΩ
Ch.1 IN
Ch.1 OUT
Ch.2 OUT
3µH
3µH
4.7Ω
4.7Ω
4.7Ω
/1W
0.1µF
4.7Ω
/1W
SUB.GND
--VL
+VH
--VH
+VL
GND
*1: Cement resistor, 0.22 Ω, ±10% (5 W)
