86
■Features
• High output current (6A:STR7000 series, 12A: STR7100 series)
• High efficiency (70 to 90%)
• Wide DC input voltage range
• Built-in drooping type overcurrent protection circuit
• Foldback type overcurrent protection can be set externally.
• Output voltage adjustment
• Built-in reference oscillator (35kHz)
• Output ON/OFF control
■Applications
• Electronic equipment
■Lineup
■Absolute Maximum Ratings
P o wer Section: STR7000/STR7100 (T a=25°C)
■Contr ol Section: SI-8020 Series (T a=25°C)
Separate Excitation Switching Type
STR7000+SI-8020 Series
●STR7000+SI-8020 Series
Unit
V
W
°C
°C
Symbol
VIN
PD
TOP
TStg
VO (V)
IO (A)
6
12
Paraneter
DC Input Voltage
Power Dissipation
Operating Temperature
Storage Temperature
Unit
V
V
V
A
W
W
°C/W
°C
°C
°C
Symbol
V4-1
V4-5
V1-2
IC
PD1
PD2
Rth(j-c)
Tj
TOP
TStg
Parameter
P ower Transistor Breakdown Voltage
Drive Transistor Breakdown V oltage
Diode Breakdown Voltage
Collector Current
Power Dissipation
P ower Transistor Thermal Resistance
P ower Transistor Junction Temperature
Operating Temperature
Storage Temperature
Ratings
55
1
–20 to +85
–20 to +100
Ratings
STR7000 Series STR7100 Series
60
60
60
6(peak 7.5) 12(peak 15)
100(TC=25°C) 125(TC=25°C)
4.3(Without heatsink)
1.25 1.0
+150
–30 to +125(TC)
–30 to +125
5121524
STR7001+SI-8020 STR7002+SI-8021 STR7002+SI-8022 STR7003+SI-8023
STR7101+SI-8020 STR7102+SI-8021 STR7102+SI-8022 STR7103+SI-8023
87
●STR7000+SI-8020 Series
■Electrical Characteristics: 6A Type (Ta=25°C)
Unit
V
V
%
kHZ
mV
mV
dB
A
A
■Electrical Characteristics: 12A Type (Ta=25°C)
Unit
V
V
%
kHZ
mV
mV
dB
A
A
Symbol
VIN
VO
Conditions
η
Conditions
f
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
RREJ
Conditions
IS1
IS2
Conditions
Parameter
DC Input Voltage Range
Output V oltage
Efficiency
Switching Frequency
Line Regulation
Load Regulation
Ripple Rejection
Overcurrent Protection Starting Current
Limited Current at Overcurrent
Protection Operation
Parameter
DC Input Voltage Range
Output V oltage
Efficiency
Switching Frequency
Line Regulation
Load Regulation
Ripple Rejection
Overcurrent Protection Starting Current
Limited Current at Overcurrent
Protection Operation
Ratings
STR7101+SI-8020 STR7102+SI-8021 STR7102+SI-8022 STR7103+SI-8023
min. typ. max. min. typ. max. min. typ. max. min. typ. max.
11 40 18 50 21 50 30 50
5.0 5.1 5.2 11.8 12.0 12.2 14.8 15.0 15.2 23.7 24.0 24.3
V
IN
=20V, I
O
=6.0A V
IN
=27V, I
O
=6.0A V
IN
=30V, I
O
=6.0A V
IN
=40V, I
O
=6.0A
70 82 84 87
V
IN
=20V, I
O
=6.0A V
IN
=27V, I
O
=6.0A V
IN
=30V, I
O
=6.0A V
IN
=40V, I
O
=6.0A
35 35 35 35
V
IN
=20V, I
O
=6.0A V
IN
=27V, I
O
=6.0A V
IN
=30V, I
O
=6.0A V
IN
=40V, I
O
=6.0A
80 120 150 200
V
IN
=15 to 25V, I
O
=6.0A V
IN
=22 to 32V, I
O
=6.0A V
IN
=25 to 35V, I
O
=6.0A V
IN
=35 to 45V, I
O
=6.0A
30 40 40 50
V
IN
=20V, I
O
=3 to 9A V
IN
=27V, I
O
=3 to 9A V
IN
=30V, I
O
=3 to 9A V
IN
=40V, I
O
=3 to 9A
45 45 45 45
f=100 to 120H
Z
f=100 to 120H
Z
f=100 to 120H
Z
f=100 to 120H
Z
12 15 12 15 12 15 12 15
12 15 12 15 12 15 12 15
R
S
=0.01ΩR
S
=0.01ΩR
S
=0.01ΩR
S
=0.01Ω
Ratings
STR7001+SI-8020 STR7002+SI-8021 STR7002+SI-8022 STR7003+SI-8023
min. typ. max. min. typ. max. min. typ. max. min. typ. max.
11 40 18 50 21 50 30 50
5.0 5.1 5.2 11.8 12.0 12.2 14.8 15.0 15.2 23.7 24.0 24.3
V
IN
=20V, I
O
=3.0A V
IN
=27V, I
O
=3.0A V
IN
=30V, I
O
=3.0A V
IN
=40V, I
O
=3.0A
72 84 86 90
V
IN
=20V, I
O
=3.0A V
IN
=27V, I
O
=3.0A V
IN
=30V, I
O
=3.0A V
IN
=40V, I
O
=3.0A
35 35 35 35
V
IN
=20V, I
O
=3.0A V
IN
=27V, I
O
=3.0A V
IN
=30V, I
O
=3.0A V
IN
=40V, I
O
=3.0A
80 120 150 200
V
IN
=15 to 25V, I
O
=3.0A V
IN
=22 to 32V, I
O
=3.0A V
IN
=25 to 35V, I
O
=3.0A V
IN
=35 to 45V, I
O
=3.0A
30 40 40 50
V
IN
=20V, I
O
=1 to 5A V
IN
=27V, I
O
=1 to 5A V
IN
=30V, I
O
=1 to 5A V
IN
=40V, I
O
=1 to 5A
45 45 45 45
f=100 to 120H
Z
f=100 to 120H
Z
f=100 to 120H
Z
f=100 to 120H
Z
6.0 7.5 6.0 7.5 6.0 7.5 6.0 7.5
6.0 7.5 6.0 7.5 6.0 7.5 6.0 7.5
R
S
=0.02ΩR
S
=0.02ΩR
S
=0.02ΩR
S
=0.02Ω
Symbol
VIN
VO
Conditions
η
Conditions
f
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
RREJ
Conditions
IS1
IS2
Conditions
88
■Outline Drawing
qSWOUT(backside of case)
wFly Wheel(ground)
eDrive
rVIN
tGND
Plastic Mold Package
Flammability: UL94V-0
Weight: Approx. 14.5g
Plastic Mold Package
(powder coating)
Weight: Approx. 3.4g
STR7000/7100 Series SI-8020 Series
■Block Diagram
STR7000/7100 Series SI-8020 Series
V
IN
DRIVE
GND F.WHEEL
SW.OUT
4
3
52
1
VIN 10 7 VREF
5 DRIVE
1 GND
2 VO ADJ
3VO.SENSE684 COMPENSATION. BCOMPENSATION. ACURR.SENSE
OSC.OUT SHUT DOWN
PWM COMP
VO AMPIO AMP
VOLTAGE
REFERENCE
and
REGULATOR
9
+
–
+
–
+
–
DEAD TIME
CONTROLLED
RAMP
GENERATOR
●STR7000+SI-8020 Series
(unit: mm)
36.0
±0.3
2.0
±0.2
24.4
±0.2
5.45×4
2.0
3.0
30°
3.5 5.45
1.0
+0.2
–0.1
0.6
+0.2
–0.1
12.0
±0.3
21.2
±0.3
3.2
±0.1
4.7
max.
6.0
max.
20.0
min.
qwert
φ
Lot Number
Part Number
6
max.
30
max.
1 Pin
DOT
25
max.
0.27
±0.05
0.5
±0.05
2.54
±0.1
7
max.
123456789
10
4.5
±1.0
Part Number
Lot Number
89
■Standard External Circuit
■Notes of Pattern Design
1) Thick lines in the Standard External Circuit are lines through which a large current flows. Make these pattern lines as thick as possible.
2) Place capacitor C1 on the input side as closely as possible to terminals no.2 and no.4 of the STR7000/7100 series. C1 may be used in
combination with a smoothing capacitor for rectifying, b ut the abov e points must be taken into consideration. In cases where C1 is not provided
or it is placed too far from the terminals stated above, abnormal oscillation due to poorer transient response or increased ringing may occur.
3) Connect v oltage sensing terminal VO.S and GND as closely as possible to output capacitor C4 (a current of approximately 1mA flows into the
VO.S terminal). If they are placed too far from C4, abnormal oscillation due to decreased regulation or increased switching ripple may occur.
4) Connect current sensing terminal C.S and GND as closely as possible to the detection resistor Rs (a current of approximately 0.5mA flows
from the CS terminal).
If they are placed too far from Rs, a decrease of the overcurrent setting point due to the voltage drop in the patter n, or malfunction of the
protection circuit due to increased ringing may occur.
■Ta-PD Characteristics
STR7000 Series STR7100 Series
3
2
9
4
VIN
C1
C5 330P
C2
330p
C3
10µF
2200µFC4
1500µF × 2 (parallel)
VO
GND
*C5 STR7100 Series only
1
25 5
1
10
8
6
7
3
4VIN
GNDF/W
DRIVE
STR7000
STR7100
SERIES
SW
VIN VO.S
RS
VO. ADJ
OSC. OUT
SHUT DOWN
VREF C.S
C.A
C.B
GND
DRIVE
L
*
6A ... 0.02Ω
12A ... 0.01Ω
5V ... 200µH
12V ... 250µH
15V
24V ... 300µH
SI-8020
SERIES
40
35
30
25
20
15
10
5
0
–20 0 25 50 75 100 125
Power Dissipation P
D
(W)
Ambient Temperature T
a
(°C)
200×300×2
200×200×2
100×200×2
100×100×2
75×75×2
Without heatsink
Without Mica
With Silicon Grease
Heatsink: Aluminum
Unit: mm
40
35
30
25
20
15
10
5
0
–20 0 25 50 75 100 125
Power Dissipation P
D
(W)
Ambient Temperature T
a
(°C)
200×300×2
200×200×2
100×200×2
100×100×2
75×75×2
Without heatsink
Without Mica
With Silicon Grease
Heatsink: Aluminum
Unit: mm
●STR7000+SI-8020 Series
90
■Typical Characteristics
STR7001+SI-8020(5V) STR7002+SI-8021(12V) STR7003+SI-8023(24V)
Rise Characteristics Rise Characteristics Rise Characteristics
Efficiency Characteristics Efficiency Characteristics Efficiency Characteristics
0
10
8
6
4
2
02 4 6 8 10 12 14 16 18 20
Input Voltage VIN (V)
Output Voltage VO (V)
I
O
=0.1A
3A
6A
100
90
80
70
60
50
40
30
001234567
Output Current I
O
(A)
Efficiency η (%)
V
IN
=11V
20V
30V
40V
0 5 10 15 20 25 30 35 40 45
I
O
=0.1A
6A
20
15
10
5
0
Input Voltage VIN (V)
Output Voltage VO (V)
3A
100
90
80
70
60
50
40
001234 567
V
IN
=18V
30V
40V
50V
Output Current I
O
(A)
Efficiency η (%)
0 5 10 15 20 25 30 35 40 45
Input Voltage V
IN
(V)
3A
I
O
=0.1A
6A
30
25
20
15
10
5
0
Output Voltage V
O
(V)
100
90
80
70
60
50
40
001234567
V
IN
=30V
40V
50V
Output Current IO (A)
Efficiency η (%)
015510 202530 454035
30
25
20
15
10
5
0
Input Volta
g
e V
IN
(
V
)
Output Voltage V
O
(V)
lo=0.1 A
12 A
0624 8101214
100
90
80
70
60
50
0
Output Current I
O
(A)
Efficiency η (%)
V
IN
=30V
40V
50V
STR7101+SI-8020(5V) STR7102+SI-8021(12V) STR7103+SI-8023(24V)
Rise Characteristics Rise Characteristics Rise Characteristics
Efficiency Characteristics Efficiency Characteristics Efficiency Characteristics
02468101214161820
10
8
6
4
2
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
l
O
=0.1 A
6 A
12 A
0624 8101214
100
90
80
70
60
50
40
30
0Output Current IO (A)
Efficiency η (%)
VIN=11V
20V
30V
40V
02051015 253035 4540
20
15
10
5
0
Input Voltage V
IN
(V)
Output Voltage V
O
(V)
lo=0.1 A
6 A
12 A
0624 8101214
100
90
80
70
60
50
40
0
Output Current I
O
(
A
)
Efficiency η (%)
V
IN
=18V
30V
40V
50V
(Ta=25°C)
●STR7000+SI-8020 Series
