SANYO STK416-120-E

Ordering number : EN*A1621
Thick-Film Hybrid IC
STK416-090-E
3-Channel Power Switching
Audio Power IC, 80W+80W+80W
Overview
The STK416-090-E is a class H audio power amplifier hybrid IC that features a built-in power supply switching circuit.
This IC provides high efficiency audio power amplification by controlling (switching) the supply voltage supplied to the
power devices according to the detected level of the input audio signal.
Applications
• Audio power amplifiers.
Features
• Pin-to-pin compatible outputs ranging from 80W to 180W.
• Can be used to replace the STK415-100 series (2-channel models) and the class-AB series (2, 3-channel models) due to
its pin compatibility.
• Pure complementary construction by new Darlington power transistors
• Output load impedance: RL = 8Ω to 4Ω supported
• Using insulated metal substrate that features superlative heat dissipation characteristics that are among the highest in the
industry.
Series Models
STK416-090-E
STK416-100-E
STK416-120-E
STK416-130-E
Output 1 (10%/1kHz)
80W×3ch
90W×3ch
120W×3ch
150W×3ch
Output 2 (0.8%/20Hz to 20kHz)
50W×3ch
60W×3ch
80W×3ch
100W×3ch
Max. rated VH (quiescent)
±60V
±65V
±73V
±80V
Max. rated VL (quiescent)
±41V
±42V
±45V
±46V
Recommended operating VH (8Ω)
±38V
±39V
±46V
±51V
Recommended operating VL (8Ω)
±27V
±29V
±32V
±34V
Dimensions (excluding pin height)
78.0mm×44.1mm×9.0mm
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. 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.
21710HKIM No. A1621-1/12
STK416-090-E
Specifications
Absolute maximum ratings at Ta=25°C (excluding rated temperature items), Tc=25°C unless otherwise specified
Parameter
Symbol
Conditions
Ratings
Unit
VH maximum quiescent supply voltage 1
VH max (1)
When no signal
±60
V
VH maximum supply voltage 2
VH max (2)
RL≥6Ω
±53
V
VH maximum supply voltage 3
VH max (3)
RL≥4Ω
±43
V
VL maximum quiescent supply voltage 1
VL max (1)
When no signal
±41
V
VL maximum supply voltage 2
VL max (2)
RL≥6Ω
±36
V
VL maximum supply voltage 3
Maximum voltage between VH and VL *4
VL max (3)
VH-VL max
RL≥4Ω
±29
V
60
V
Standby pin maximum voltage
Vst max
Thermal resistance
θj-c
Per power transistor
2.1
°C/W
Junction temperature
Tj max
Both the Tj max and Tc max conditions must be met.
150
°C
IC substrate operating temperature
Tc max
125
°C
Storage temperature
Tstg
-30 to +125
°C
Allowable load shorted time
*3
No loading
-0.3 to +5.5
ts
VH=±38V, VL=±27V, RL=8Ω, f=50Hz,
0.3
PO=50W, 1-channel active
V
s
Electrical Characteristics at Tc=25°C, RL=8Ω (non-inductive load), Rg=600Ω, VG=40dB, VZ=15V
Conditions *1
Parameter
Symbol
Output power
PO (1)
Total harmonic distortion
Frequency characteristics
Input impedance
Output noise voltage
Quiescent current
standby ON
standby OFF
VH
VL
±30
THD
VH
±38
VL
±27
VH
VL
±38
VH
VL
±38
VH
VL
±45
VH
±45
VL
±30
VH
VL
±45
VH
VL
±38
VH
VL
±38
fL, fH
VNO
VST ON
*7
Pin 17 voltage when
VST OFF
*7
(Hz)
PO (2)
VN
Pin 17 voltage when
(V)
±38
ICCO
Output neutral voltage
f
VH
VL
ri
*2
V
±27
±23
±30
Ratings
THD
min
(%)
20 to 20k
0.8
1k
0.8
±27
max
unit
50
20 to 20k
50
50
1.0
1k
RL=4Ω
+0 -3dB
1.0
0.4
%
20 to 50k
Hz
55
Rg=2.2kΩ
40
150
-70
Standby
Operating
kΩ
1.0
RL=∞
±30
±27
typ
W
±27
±27
PO
(W)
2.5
mVrms
mA
0
+70
mV
0
0.6
V
3.0
V
[Remarks]
*1: Unless otherwise specified, use a constant-voltage power supply to supply power when inspections are carried out.
*2: The output noise voltage values shown are peak values read with a VTVM. However, an AC stabilized (50Hz)
power supply should be used to minimize the influence of AC primary side flicker noise on the reading.
*3: Use the designated transformer power supply circuit shown in the figure below for the measurements of allowable
load shorted time and output noise voltage.
*4: Design circuits so that (|VH|-|VL|) is always less than 40V when switching the power supply with the load
connected.
*5: Set up the VL power supply with an offset voltage at power supply switching (VL-VO) of about 8V as an initial
target.
*6: Please connect –Pre VCC pin (#5 pin) with the stable minimum voltage and connect so that current does not flow in
by reverse bias.
*7: Use the standby pin (pin 17) so that the applied voltage never exceeds the maximum rating.
The power amplifier is turned on by applying +2.5V to +5.5V to the standby pin (pin 17).
Continued on next page.
No. A1621-2/12
STK416-090-E
Continued from preceding page.
*8: Thermal design must be implemented based on the conditions under which the customer’s end products are
expected to operate on the market.
*9: The thermoplastic adhesive is used to bond the case and the aluminum substrate, so, please be sure to fix the Hybrid
IC on the heat sink before soldering and mount it. In addition, please attach and remove the heat sink at normal
temperature.
*10: Weight of HIC: 36.8g
Outer carton dimensions (W×L×H): 452mm×325mm×192mm
DBA40C
DBA40C
10000μF
+VH
+
10000μF
+VL
+
500Ω
500Ω
+
+
500Ω
500Ω
-VH
10000μF
10000μF
Designated transformer power supply
(MG-250 equivalent)
-VL
Designated transformer power supply
(MG-200 equivalent)
Package Dimensions
unit:mm (typ)
78.0
70.0
9.0
1
23
4.0
3.6
2.0
(13.0)
26.5
21.7
5.0
44.1
(R1.8)
0.5
22 2.0=44.0
0.4
2.9
5.5
No. A1621-3/12
STK416-090-E
Internal Equivalent Circuit
19
18
11 10
12
7
Pre Driver
CH1
Pre Driver
CH2
Comparator
3
15
1
16
2
Stand-by Circuit
5
4
Pre Driver
CH3
SUB
Comparator
6
13
17
14
12
9 8
20
21
23 22
Test Circuit
STK416-100-E series
+OFF -OFF
OUT OUT OUT OUT
IN NF ST NF IN IN NF OUT OUT
+VL -VL SET SET -Pre -VH +VH Ch1+ Ch1- Ch2+ Ch2- +Pre SUB GND Ch1 Ch1 BY Ch2 Ch2 Ch3 Ch3 Ch3+ Ch38
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
4 5
6
7
2
3
1
C23
C22
R24
D03 D04
R26
R18
C07
R19
R20
C09
R14
C13
R15
C14
Stand-by
C24
R28
C08
R30
C18
R23
Ch3-IN
R07
C21
C17
R16
C15
R22
R06
C20
R05
C19
Ch2-IN
GND
Ch1-IN
+VH
C16
C01
R03
D01
C03
GND
C04
-VL
-VH
L03
C05
+VL
C02
R01
Ch3-OUT
R13
L02
R02
C06
D02
R21
R12 C12
R10
R04
C11
R09
R08
L01
C10
Ch2-OUT
GND
Ch1-OUT
R11
No. A1621-4/12
STK416-090-E
Recommended External Components
Parts Location
Recommended
Circuit Purpose
Value
R01, R02
1.5kΩ
R03, R04
100Ω/1W
Current for supply switch circuit (comparator)
is determined.
Above Recommended
VH holding frequency
range becomes large.
Resistance for ripple filter.
-
constituted with C05, C06.)
56kΩ
R08, R09, R10
4.7Ω/1W
R11, R12, R13
4.7Ω
R14, R15, R16
560Ω
Input impedance is determined.
Value
VH holding frequency
range becomes narrow.
Short-through current
(Fuse resistance is recommended. Ripple filter is
R05, R06, R07
Below Recommended
Value
may increase at high
frequency.
Output neutral voltage (VN) shift.
(It is referred that R05=R18, R06=R19, R07=R20)
Resistance for oscillation prevention.
-
-
Noise absorption resistance.
-
-
Voltage gain (VG) is determined with R18, R19, R20.
It may oscillate.
With especially no
(As for VG, it is desirable to set up by R14, R15, R16.)
(VG<40dB)
problem
R18, R19, R20
56kΩ
Voltage gain (VG) is determined with R14, R15, R16
R21, R22, R23
1kΩ
Resistance for input filters.
R24, R26, R28
0.22Ω
±10%, 5W
R30
Note*6
C01, C02
100μF/100V
-
-
-
-
Output emitter resistor
Decrease of maximum
It may cause thrmal
(Metal-plate Resistor is recommended.)
output power
runaway
Select restriction resistance, for the impression voltage of ‘#17 (stand-by) pin’ must not exceed the maximum
rating.
Capacitor for oscillation prevention.
•Locate near the HIC as much as possible.
•Power supply impedance is lowered and stable
-
-
-
-
operation of the IC is carried out.
(Electrolytic capacitor is recommended.)
C03, C04
100μF/50V
Capacitor for oscillation prevention.
•Locate near the HIC as much as possible.
•Power supply impedance is lowered and stable
operation of the IC is carried out.
(Electrolytic capacitor is recommended.)
C05, C06
100μF/100V
Decoupling capacitor
The change in the ripple ingredient mixed in an input
•The ripple ingredient mixed in an input side is
side from a power supply line
removed from a power supply line.
(Ripple filter is constituted with R03, R04.)
C07, C08, C09
3pF
Capacitor for oscillation prevention.
C10, C11, C12
0.1μF
Capacitor for oscillation prevention.
It may oscillate.
C13, C14, C15
22μF/10V
Negative feedback capacitor.
The voltage gain (VG) of
The voltage gain (VG) of
•The cutoff frequency of a low cycle changes.
low frequency is
low frequency decreases.
(fL=1/(2π•C13•R14))
It may oscillate.
extended. However, the
pop noise at the time of a
power supply injection
also becomes large.
C16, C17, C18
2.2μF/50V
C19, C20, C21
470pF
Input coupling capacitor (for DC current prevention.)
-
-
-
-
Input filter capacitor
•A high frequency noise is reduced with
the filter constituted by R21, R22, R23.
C22, C23, C24
100pF
D01, D02
15V
D03, D04
3A/60V
Capacitor for oscillation prevention.
It may oscillate.
Decide offset voltage for supply voltage ciecuit.
Decrease distortion at
Increase distortion at
supply voltage shift
supply voltage shift
Adverse current prevention diode
-
(FRD is recommended)
L01, L02, L03
3μH
Coil for oscillation prevention.
With especially
It may oscillate.
no problem
No. A1621-5/12
STK416-090-E
Sample PCB Trace Pattern
STK415-100-E-Sr/STK416-100-E-Sr PCB PARTS LIST
STK415, 416-100-E Series PCB Parts List
PCB Name: STK415/416sr-PCB C
Location No.
(*2) 2ch Amp doesn't mount parts of ( ).
R01, R02
PARTS
RATING
Component
ERG1SJ152
1.5kΩ, 1W
enabled
enabled
R03, R04
ERG1SJ101
100Ω, 1W
R05, R06, (R07), R18, R19, (R20)
RN16S563FK
56kΩ, 1/6W
enabled
enabled
R08, R09, (R10)
ERX1SJ4R7
4.7Ω, 1W
R11, R12, (R13)
RN14S4R7FK
4.7Ω, 1/4W
enabled
R14, R15, (R16)
RN16S561FK
560Ω, 1/6W
enabled
R21, R22, (R23)
RN16S102FK
1kΩ, 1/6W
enabled
R24, R26, (R28)
ERX2SJR22
0.22Ω, 5W (*1)
enabled
R25, R27, (R29)
-
-
Short
R35, R36, (R37)
-
-
Short
C01, C02, C05, C06
100MV100HC
100μF, 100V
enabled
C03, C04
100MV50HC
100μF, 63V
enabled
C07, C08, (C09)
DD104-63CJ030C50
3pF, 50V
enabled
C10, C11, (C12)
ECQ-V1H104JZ
0.1μF, 50V
enabled
C13, C14, (C15)
10MV22HC
22μF, 10V
enabled
C16, C17, (C18)
50MV2R2HC
2.2μF, 50V
enabled
C19, C20, (C21)
DD104-63B471K50
470pF, 50V
enabled
DD104-63B101K50
100pF, 50V
enabled
GZA15X
VZ=15V
enabled
60V, 3A (FRD)
enabled
C22, C23, (C24)
D01, D02
(*3)
D03, D04
ERC91-02SC
L01, L02, (L03)
Stand-by Control Circuit
J01, 02, J03, J04, J05, J06
-
3μH
enabled
Tr1
2SC1209 (Reference)
VCE≥80V, IC≥10mA
enabled
D05
GMB05 (Reference)
Di
enabled
R30
RN16S512FK
2.7kΩ, 1/6W
enabled
R32
RN16S102FK
1kΩ, 1/6W
enabled
R33
RN16S333FK
33kΩ, 1/6W
enabled
R34
RN16S202FK
2kΩ, 1/6W
enabled
C25
10MV47HC
47μF, 10V
enabled
-
-
enabled
(*1) Metal Plate Cement Resistor use.
(*2) STK415series (2ch Amp) doesn't mount parts of ( )
(*3) STK415-140-E uses GZA18X (ZD=18X) for D01, D02.
No. A1621-6/12
STK416-090-E
Pin Assignments
[STK433-000/-100/-200 Sr & STK415/416-100 Sr Pin Layout]
1
2ch class-AB
2
3
4
5
6
7
8
9
10
11
12
13
14
15
I
N
S
N
I
N
F
T
F
N
2ch classAB/2.00mm
STK433-030-E 30W/JEITA
-
-
+
O
O
O
O
+
STK433-040-E 40W/JEITA
P
V
V
U
U
U
U
P
S
G
STK433-060-E 50W/JEITA
R
C
C
T
T
T
T
R
U
N
/
/
A
/
/
STK433-070-E 60W/JEITA
E
C
C
/
/
/
/
E
B
D
C
C
N
C
C
C
C
C
C
•
H
H
D
H
H
STK433-090-E 80W/JEITA
H
H
H
H
G
1
1
|
2
2
STK433-100-E 100W/JEITA
1
1
2
2
N
B
STK433-120-E 120W/JEITA
+
-
+
-
D
Y
4
5
6
7
15
STK433-130-E 150W/JEITA
1
3ch class-AB
2
3
8
9
10
11
12
13
14
16
17
18
19
3ch classAB/2.00mm
STK433-230A-E 30W/JEITA
-
-
+
O
O
O
O
+
I
N
S
N
I
I
N
O
O
STK433-240A-E 40W/JEITA
P
V
V
U
U
U
U
P
S
G
N
F
T
F
N
N
F
U
U
STK433-260A-E 50W/JEITA
R
C
C
T
T
T
T
R
U
N
/
/
A
/
/
/
/
T
T
STK433-270-E 60W/JEITA
E
C
C
/
/
/
/
E
B
D
C
C
N
C
C
C
C
/
/
C
C
C
C
•
H
H
D
H
H
H
H
C
C
STK433-290-E 80W/JEITA
H
H
H
H
G
1
1
|
2
2
3
3
H
H
STK433-300-E 100W/JEITA
1
1
2
2
N
B
3
3
STK433-320-E 120W/JEITA
+
-
+
-
D
Y
+
-
11
STK433-330-E 150W/JEITA
1
2
3
4
5
6
7
8
9
10
STK415-090-E 80W/JEITA
+
-
+
-
-
-
+
O
O
O
O
+
STK415-100-E 90W/JEITA
V
V
O
O
P
V
V
U
U
U
U
P
S
G
STK415-120-E 120W/JEITA
L
L
H
H
T
T
T
T
R
U
N
/
/
A
/
/
/
/
/
/
E
B
D
C
C
N
C
C
2ch class-H
12
13
14
15
16
17
18
19
I
N
S
N
I
N
F
T
F
N
2ch classH/2.00mm
F
F
R
STK415-130-E 150W/JEITA
F
F
E
STK415-140-E 180W/JEITA
S
S
C
C
C
C
•
H
H
D
H
H
E
E
H
H
H
H
G
1
1
|
2
2
T
T
1
1
2
2
N
3
4
19
3ch class-H
1
2
5
6
7
+
-
+
-
8
9
10
11
B
Y
D
12
13
14
15
16
17
18
20
21
22
23
3ch classH/2.00mm
STK416-090-E 80W/JEITA
+
-
+
-
-
-
+
O
O
O
O
+
I
N
S
N
I
I
N
O
O
STK416-100-E 90W/JEITA
V
V
O
O
P
V
V
U
U
U
U
P
S
G
N
F
T
F
N
N
F
U
U
STK416-120-E 120W/JEITA
L
L
F
F
R
H
H
T
T
T
T
R
U
N
/
/
A
/
/
/
/
T
T
F
F
E
/
/
/
/
E
B
D
C
C
N
C
C
C
C
/
/
S
S
C
C
C
C
•
H
H
D
H
H
H
H
C
C
E
E
H
H
H
H
G
1
1
|
2
2
3
3
H
H
T
T
1
1
2
2
N
B
3
3
+
-
+
-
D
Y
+
-
STK416-130-E 150W/JEITA
No. A1621-7/12
STK416-090-E
THD - PO
Total harmonic distortion, THD - %
10
7
5
3
2
1.0
7
5
3
2
f=20k
0.1
7
5
3
2
VH=±38V
VL=±27V
VG=40dB
Rg=600Ω
Tc=25°C
RL=8Ω
3ch Drive
Hz
1kHz
0.01
7
5
3
2
0.001
1.0
2
3
5 7 10
2
3
5 7 100
2
3
Output power, PO/ch - W
140
130
Output power, PO/ch - W
120
110
100
PO - V L
VH=±38V
VL=±27V
VG=40dB
f=1kHz
Rg=600Ω
Tc=25°C
RL=8Ω
3ch Drive
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
0.1
140
130
120
90
80
70
60
50
40
110
100
VL=±27V
VG=40dB
f=1kHz
RL=8Ω
3ch Drive
Rg=600Ω
80
70
60
50
40
30
20
10
0
10
10
0
20
30
40
ITF02729
PO - f
2 3
5 7 10
2 3
5 7 100
2 3
5 71000
ITF02728
)
Hz
1k
z)
=
(f
kH
1
%
0
f=
=1 8%(
D
.
0
z)
T H D=
kH
0
H
2
T
f=
%(
0.8
=
D
TH
90
20
150
5 7 1.0
PO - V H
30
20
2 3
Output power, PO/ch - W
150
VH=±38V
VG=40dB
f=1kHz
RL=8Ω
3ch Drive
Rg=600Ω
Supply voltage, VL - ±V
30
40
Supply voltage, VH - ±V
50
60
ITF02730
VH=±38V
VL=±27V
RL=8Ω
3ch Drive
VG=40dB
Tc=25°C
140
130
120
Output power, PO/ch - W
Pd - PO
150
ITF02727
Output power, PO/ch - W
150
5 7 1000
Total power dissipation within the board, Pd - W
Evaluation Board Characteristics
110
100
90
THD=10%
80
THD=0.8%
70
60
50
40
30
20
10
0
10
2 3
5 7 100
2 3
5 7 1k
2 3
Frequency, f - Hz
5 7 10k
2 3
5 7100k
ITF02731
No. A1621-8/12
STK416-090-E
[Thermal Design Example for STK416-090-E (RL = 8Ω)]
The thermal resistance, θc-a, of the heat sink for total power dissipation, Pd, within the hybrid IC is determined as
follows.
Condition 1: The hybrid 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
θj-c: Thermal resistance per power transistor
However, the power dissipation, Pd, for the power transistors shall be allocated equally among the number of power
transistors.
The following inequalities result 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
VH, VL
• Load resistance
RL
• Guaranteed ambient temperature
Ta
[Example]
When the IC supply voltage, VH=±38V, VL=±27V and RL is 8Ω, the total power dissipation, Pd, within the hybrid
IC, will be a maximum of 91W at 1kHz for a continuous sine wave signal according to the Pd-PO characteristics.
For the music signals normally handled by audio amplifiers, a value of 1/8PO max is generally used for Pd as an
estimate of the power dissipation based on the type of continuous signal. (Note that the factor used may differ
depending on the safety standard used.)
This is:
Pd ≈ 45.0W
(when 1/8PO max. = 6.25W, PO max. = 50W).
The number of power transistors in audio amplifier block of these hybrid ICs, N, is 4, and the thermal resistance per
transistor, θj-c, is 2.1°C/W. Therefore, the required heat sink thermal resistance for a guaranteed ambient temperature,
Ta, of 50°C will be as follows.
From formula (1)'
θc-a < (125 − 50)/45.0
< 1.67
From formula (2)'
θc-a < (150 − 50)/45.0 − 2.1/6
< 1.87
Therefore, the value of 1.67°C/W, which satisfies both of these formulae, is the required thermal resistance of the heat
sink.
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. A1621-9/12
STK416-090-E
STK416-100-E Series Stand-by Control & Mute Control Application
STK416-100-E Series
4.7kΩ
+OFF -OFF
OUT OUT OUT OUT
IN NF
+VL -VL SET SET -Pre -VH +VH Ch1+ Ch1- Ch2+ Ch2- +Pre SUB GND Ch1 Ch1
1
2
4
3
5
6
8
7
#17pin
standard voltage VST
ST NF IN IN NF OUT OUT
BY Ch2 Ch2 Ch3 Ch3 Ch3+ Ch3-
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
1kΩ
Stand-by Control (ex)
H: Operation Mode (+5V)
L: Stand-by Mode (0V)
33kΩ
2.7kΩ
47μF
/10V
2kΩ
Ch3-IN
10kΩ
Ch2-IN
10kΩ
470pF
GND
10kΩ
+VH
+VL
10kΩ
Ch3-OUT
GND
Mute Control
H: Single Mute
L: Normal
2.2kΩ
Ch2-OUT
-VL
GND
-VH
Ch1-IN
Stand-by
Control
+5V
+5V
Ch1-OUT Mute Control
ST-BY
MUTE
ST-BY
PLAY
MUTE
STK416-100-E Series Application explanation
Operate mode (VSTOFF) ≥2.5V
Stand-By mode (VSTON) <0.6V (0V typ)
STK416-100-E Series
Stand-by Circuit
in Pre Driver IC
SW transistor
7
12
13
56kΩ
10
11
6.8kΩ
14
15
Ch2
NF
Ch2
IN
16
18
19
17
Ch3
Ch3
OUT(+) OUT(-)
22
56kΩ 6.8kΩ
I1
22kΩ
56kΩ
I3
I2
Point.C
23
Tr2
Tr2
56kΩ
(2) Load short
detection part
Tr1
9
8
56kΩ 6.8kΩ
Ch1 ST
NF BY
0.22Ω/5W
6
Ch1
GND IN
56kΩ
5
SUB
0.22Ω/5W
4
Ch1
Ch1
Ch2
Ch2
OUT(+) OUT(-) OUT(+) OUT(-) +Pre
56kΩ
1
-VH +VH
0.22Ω/5W
-Pre
4.7kΩ (*3)
ΔVBE
Point.B
Tr4
(*4) R2
0.1μF
1kΩ
10kΩ
Tr3
(3) Latch-up
100kΩ
circuit part
OUT Ch3
-VCC
82kΩ
Tr5
82kΩ
OUT Ch1
OUT Ch2
1kΩ
1) Stand-by control circuit part
H: Operation mode (+5V)
L: Stand-by mode (0V)
Tr6
22μF
82kΩ 22μF
100
kΩ
(*1) R1 Tr5
ex) 2.7kΩ
33μF
33kΩ
2kΩ
(*2)
ex) +5V
(4) DC vffset
protection
No. A1621-10/12
STK416-090-E
A protection application circuit of STK416-100sr consists of each block of (1)-(4).
(1)Stand-by control circuit part
(2)Load short detection part
(3)Latch-up circuit part
(4)DC voltage protection part
1) Stand-by control circuit part
About #17 pin reference voltage VST.
<1> Operation mode
The SW transistor of pre-driver IC is turned on at VST ≥ 2.5V, and the amplifier becomes operation mode.
ex) at VST (min) = 2.5V
VST = (*2) × IST + 0.6V → 2.5V=4.7kΩ × IST + 0.6V, I1 ≈ 0.40mA
<2> Stand-by mode
The SW transistor of pre-driver IC is turned off at VST ≤ 0.6V (typ 0V), and the amplifier becomes stand-by
mode.
ex) at VST = 0.6V
VST = (*2) × IST+0.6V → 0.6V = 4.7kΩ × IST + 0.6V, I1 ≈ 0mA
(*1) Resistance for restriction
Please set R1 for the voltage (VST) of the stand-by terminal to become ratings (+2.5V to 5.5V (typ 3.0V)).
(*2) Please supply the stand-by control voltage by the microcomputer etc.
(*3) The limitation resistance is built into hybrid IC internal (#17pin) and 4.7kΩ is built into.
2) Load short detection part
Please refer to the attached paper (RL short protect explanation) for the operation explanation.
TR1 (or TR2) doesn't move by normal operation. Because, Point.B - Point.C < 0.6V.
Therefore load short detection part doesn't operate.
But, when a load short-circuited, TR1 (or TR2) operate (Point.B - Point.C > 0.6V), and an electric current ‘I2’ flows.
3) Latch-up circuit part
When I2 was supplied to latch-up circuit, TR3 operate.
VST becomes stand-by mode (0V) when TR3 operates (I3 flows), the power amplifier is protected.
Stand-by mode is maintained when once TR3 operates because TR3 and TR4 compose the thyristor.
It is necessary to make the Stand-by control voltage (*2) L (0V) once to release stand-by mode and to make the
power amplifier operate again.
After, when stand-by control (*2) is returned to H (ex, +5V), it operates again.
(*4) I3 is changed depending on the power-supply voltage (-VCC).
Please set resistance (R2) to become I1 < I3 by the following calculation types.
I1 ≤ I3=VCC/R2
4) DC offset protection part
DC offset protection works at applying VDC (+), VDC (-) ≈ 0.5V (typ) to ‘OUT CH1’ or ‘OUT Ch2’, then HIC will
shutdown (stand-by mode).
It is necessary to make the stand-by control voltage (*2) L (0V) once to release stand-by mode.
The power amplifier operates again after stand-by control (*2) return to H (ex, +5V).
Please set the protection level by the resistance of ‘82kΩ’.
Moreover, please set the time constant by ‘22μ//22μ’ so as not to mis-detect it when the audio signal is output.
No. A1621-11/12
STK416-090-E
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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 Semiconductor Co.,Ltd.
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to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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This catalog provides information as of February 2010. Specifications and information herein are subject
to change without notice.
PS No. A1621-12/12