2x38] ST K400-070(# pz f
Ordering number : ЕМАЗАТА
Thick-Film Hybrid IC
AF Power Amplifier (Split Power Supply)
(15 W + 15 W min, THD = 0.4%)
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 IC,
even changes from 3-channel amplifier to 2-channel
amplifiers is possible using the same PCB. In addition,
this new series of ICs has а 6/3Q drive in order to support
the low impedance of modern speakers.
STK400-000 series (3-channel/single package)
STK401-000 series (2-channel/single package)
Output load impedance RL=6Q/3Q supported
New pin arrangement
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, boot-strap
capacitors and boot-strap resistors for external circuits
can be greatly reduced.
Maximum Ratings at Та = 25°С
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage Vcc max +29 V
Thermal resistance 6j-c Per power transistor 2.1 °C/W
Junction temperature Tj 150 °С
Operating substrate temperature ТС 125 °С
Storage temperature range Tstg —30 to 4125 °С
Permissible load short time ts Vec = +20 V, RL = 6 Q, f = 50 Hz, Ро = 15 W 1 5
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Operating Characteristics at Ta = 25°С, Е; = 6 О, Rg = 600 О, VG = 40dB, R; (non-inductive)
Parameter Symbol Conditions min typ max Unit
Quiescent current loco Vec + 24 V 20 60 100 mA
Po (1) Мес € 20 V, f = 20 to 20 kHz, THD = 0.4% 15 20 үү
Po (2) Мес * 16 V, = 1 kHz, THD = 1.0%, R = 39 15 20 үү
ЧЕЗ | THD (1) Voc € 20 V, f = 20 to 20 kHz, Po= 1.0 W 0.4 96
Total harmonic distortion
THD (2) Vcc € 20 V, = 1 kHz, Ро= 5.0 W 0.02 96
Frequency response fy, fu Voc € 20 V, Po= 1.0 W, Xue 20 to 50k Hz
Input impedance fi Voc * 20V, f = 1 kHz, Pos 1.0 W 55 ко
Output noise voltage VNo Vec + 24 V, Rg = 10 КО 1.2 mVrms
Neutral voltage VN Vcc t 24V –70 0 70 mV
* Use rated power supply for test unless otherwise specified.
* When measuring permissible load short time 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.
Specified Transformer Power Supply
О + Vcc
о 4700 џ
= -о – Ҹес
Unit (resistance: О, capacitance: F)
Internal Equivalent Circuit
TR19 | |
R16 TRI? TRM 5
11 10 14 7
Pattern Example for PCB used with either 2- or 3-channel Amplifiers.
STK 400-000 Series
Copper (Cu) foil surface
With the STK401-000 series, the 6 pin corresponds to the 1 pin with respect to the
Sample Application Circuit
Unit (resistance: О, capacitance: F)
Description of External Circuits
C1, 11 For input coupling capacitor. Used for DC current blocking. When capacitor reactance with low frequency is increased, the reactance
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 and C13 on the NF side are decreased.
C2, 12 For input filter capacitor. Permits high-region noise reduction by utilizing filter constructed with R1 and R11.
C3, 13 For NF capacitor. This capacitor determines the decline of the cut-off frequency and is calculated according to the following equation.
L= ?xX СЗ (13) X ВЗ (13)
For the purpose of achieving voltage gains prior to reduction, it is best that СЗ and C13 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
C5, 15 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 For decoupling capacitor. Reduces shock noise during power up using decay time constant circuits with R8 and R9 and eliminates
components such as ripples crossing over into the input side from the power line.
R1, 11 For input filter applied resistor.
R2, 12 For input bias resistor. The input pin is biased to zero potential. Input impedance is mostly decided with this resistance value.
R3, 13, 4, 14 For resistors to determine voltage gain (VG). We recommend a VG = 40 dB using R3 and R13 = 5600 and R4 and R14 = 560. VG
adjustments are best performed using R3 and R13. When using R4 and R14 for such purposes, R4 and R14 should be set to equal R2
and R12 in order to establish a stable VN balance.
R5, 15 For oscillation prevention resistor.
R6, 16 For oscillation prevention resistor. This resistor's electrical output resides in the signal frequency and is calculated according to the
Voc max/V2 2
P R6 (16) = R6 (16
ee) (тоят 15] + R6 as) SHOE
f = output signal frequency upper limit
R8,9 For ripple filter applied resistor. PO max, ripple rejection and power-up shock noise are modified according to this value. Set the
electrical output of these resistors while keeping in mind the flow of peak current during recharging to C8 and C9 which function as pre-
drive TR control resistors during load shorts.
L1,2 For oscillation prevention coil. Compensates phase dislocation caused by load capacitors and ensures stable oscillation.
Example of Set Design for Common PCB
3ch Amp Fixed 2ch Amp Fixed THD [%] Supply voltage [V]
IC Name ЕТА IC Мате pores f = 20 to 20kHz Veo maxi | Vogmax2 | | Vect Voc2
STK400-010 10W X3 STK401-010 ТОМ X2 +29.0 +27 +18 +14
STK400-020 15W X3 STK401-020 15W X2 +30.5 +29 +20 +16
STK400-030 20W X3 STK401-030 20W X2 +34.5 +34 +23 +19
STK400-040 25W X3 STK401-040 25W X2 +40.0 +36 +25 +21
STK400-050 30W X 3 STK401-050 30W X2 +42.0 +39 +26 +22
STK400-060 35W X 3 STK401-060 35W X2 +45.0 +41 +28 +23
STK400-070 40W Х 3 STK401-070 40W X2 0.4 +48.0 +44 +30 +24
STK400-080 45W ХЗ STK401-080 45W X2 +50.0 +45 +31 +25
STK400-090 50W X3 STK401-090 50W X2 +52.5 +47 +32 +26
STK400-100 60W X 3 STK401-100 60W X2 +55.0 +51 +35 +27
STK400-110 70W X3 STK401-110 ТОМ X2 +56.0 — +38 —
— — STK401-120 80W X 2 +61.0 Lans +42 —
= = STK401-130 100W X 2 +65.0 — +45 =
— — STK401-140 120W X 2 +74.0 = +51 —
Vcc max1 А, = 60
Vcc max2 А, = 60 to Зо
Усс] А = 60
Vcc2 А = 39
External Circuit Diagram
STK400-000 Series cch ceh Beh Reh Lch (3ch)
Cch Cch Lech Leh Rech Rch Pre Pre Pre ре Cch Cch Leh Rech Већ Leh Већ Cch
IN NF GND NF "усс “Vee “Vee "cc Hee -Усс -Wee ФУ -Yc OUT OUT OUT
X1 STK400-010~STK400-090 Ж
STK401-0002/) — X ва Reh Len (2ch)
tch Leh Асһ Асһ Pre Pre tch Асһ Већ Leh Већ
IN NF GND NF IN -VCC *tVCC NC -Vcc 4Vcc -Vcc OUT OUT
Um] О Rch OUT
Lch IN 4.7
ch INO d 3pH ~ 4.7 |
ор Sek о LchOUT
Rch INO—*H M p T s
ial 0.1 T
— — — Q4 мес
Unit (resistance: О, capacitance: F) *] Unnecessary with applications using STK400-010 to STK400-090.
Heat Radiation Design Considerations
The radiator thermal resistance дс-а required for total substrate power dissipation Pd in the STK401-020 is determined as:
Condition 1: IC substrate temperature Tc not to exceed 125°C.
Pd x Өс-а+Та «1259€. «ee (1)
where Ta is set assured ambient temperature.
Condition 2: Power transistor junction temperature Tj not to exceed 150?C.
Pd x 0c-a*Pd/N x 6ј-с+Та<1509 С: (2)
where N is the number of power transistors and 0j-c is 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 Oc-a to yield:
Вод 125 S Ta Poenos etos (1)'
Өс-а<(150-Та)/Ра-Өј-с/Ҹ eree (3)
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 Усс
e Load resistance Кү.
e Assured ambient temperature Ta
The total substrate power consumption when STK401-020 Vcc is +20 V and Кү is 6 О, for a continuous sine wave
signal, is a maximum of 27.5W (Fig. 1). In general, when this sort of continuous signal is used for estimation of power
consumption, the Pd used is 1/10th of Ро max (slight variation depending on safety standard).
Pd=15.7W (1/10 Po max=during 1.5W)
The STK401-020 has four power transistors, so the thermal resistance per transistor 0j-c is 2.1?C / W. With an assured
ambient temperature Ta of 50°C, the required radiator thermal resistance Өс-а would be:
From expression (1) Өс-а <(125—50)/15.7
From expression (2) Өс-а «(150—50)/15.7-2.1/4
To satisfy both, 4.78°C/W is the required radiator thermal resistance.
Figure 2 illustrates Pd - Ро when ће Усс of STK401-020 is +16У and R; is functioning at 30.
Pd = 17.6W (1/10 Po max = during 1.5W)
From expression (1) Өс-а «(125-50)/17.6
From expression (2) Өс-а <(150-50)/17.6–2.1/4
To satisfy both, 4.26°C / 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.
Figure 1 Figure 2
Pd - Po Pd - Po
50 - - 50 UR s
Кр=60 || [ [В =30 T]
f=1kHz g f=1kHz
Е VG=40dB | VG=40dB
5 ^ = -4 4l лета 40 E ||
8 = |Ке=600 || | E = “| Rg- 6000
'Z ~ | Dual channel driven | 8 2 |Dual channel driven
© & 4) |[Simultaneously 4 5 A зо! Simultaneously
& 5 з 5
8 $m» 44 Е | 20
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| | |
3 1 mail
ЕУ 14 Hd 2135759439 3 5 T 100 ym 23 5719 23 571 2 3 5 70
Output Power per Single Channel, Po/ch - W Output Power per Single Channel, Po/ch - W
= THD - P
100 THD Po 100 О
Total harmonic distortion, THD – %
Total harmonic distortion, THD — %
ti L 1 5 И БИ Ора ae
SOT 710 2 3 $71 2 3 5 74100 To: ? 3 8710 ? 3 $ 749 2 3 5 7109
Output Power, Po - W Output power, Ро — W
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W 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.
Ш 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:
Q 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.
Ш 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 August, 1997. Specifications and information herein are subject to
change without notice.
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