STR2000
Series
Switching Type
Features
q
q
q
q
q
Requires only 3 external components
Small size and high efficiency
Low switching noise
Variable output voltage
Use of SANKEN's semiconductor elements ensures
high reliability
Chopper • Self Oscillation Type
Applications
q
For power supplies in office equipment such as
electronic typewriters, printers, and copiers
q
For power supplies in VCRs and personal CB radios
(fixed station)
External View
s
Absolute Maximum Ratings (Ta=25°C)
Parameter
DC Input Voltage
DC Output Current
Power Dissipation
Operating Temperature
Storage Temperature
Thermal Resistance ( junction-to-case)
Symbol
V
IN
I
O
P
D
T
op
T
stg
R
th(j-c)
45
2.0 (pulse 3.0)
75 (T
C
=25°C)
15 (T
C
=100°C)
–20 to +100
–20 to +125
1.25
°C
°C
°C/W
Ratings
STR2005 STR2012 STR2013 STR2015 STR2024
50
V
A
W
Unit
s
Electrical Characteristics (Ta=25°C)
Ratings
Parameter
Symbol
STR2005
min
DC Input Voltage Range
V
IN
Condition
Output Voltage
V
O
5.0
5.1
11
STR2012
STR2013
STR2015
STR2024
typ max
50
V
Unit
typ max min typ
40
18
max min
45
19
typ max min
45
21
typ max min
45
30
I
O
=1.0A
5.2 11.8 12.0 12.2 12.8 13.0 13.2 14.8 15.0 15.2 23.7 24.0 24.3
V
IN
=24V, I
O
=1.0A
85
85
V
IN
=27V, I
O
=1.0A
85
V
IN
=27V, I
O
=1.0A
60
60
V
IN
=35V, I
O
=1.0A
85
V
IN
=35V, I
O
=1.0A
60
mV
%
V
Condition V
IN
=20V, I
O
=1.0A
Efficiency
η
∆V
OLINE
∆V
OLOAD
R
REJ
Condition
72
Condition V
IN
=20V, I
O
=1.0A
Line Regulation
50
V
IN
=24V, I
O
=1.0A
60
V
IN
=20 to 28V, I
O
=1.0A
100
V
IN
=24V, I
O
=0.5 to 1.5A
45
f=100 to 120Hz
45
100
Condition V
IN
=15 to 25V, I
O
=1.0A
Load Regulation
100
V
IN
=23 to 31V, I
O
=1.0A V
IN
=30 to 40V, I
O
=1.0A
100
100
mV
Condition V
IN
=20V, I
O
=0.5 to 1.5A
Ripple Rejection
45
V
IN
=27V, I
O
=0.5 to 1.5A V
IN
=35V, I
O
=0.5 to 1.5A
45
45
dB
Switching Frequency
f
25
25
25
25
25
kHz
Condition V
IN
=20V, I
O
=1.0A
V
IN
=24V, I
O
=1.0A
V
IN
=27V, I
O
=1.0A V
IN
=35V, I
O
=1.0A
9
STR2000
Series
s
Outline Drawing/Terminal Connections (unit:mm)
36.0
±0.3
24.4
±0.2
12.0
±0.3
3 0
°
6.0
max.
2.0
±0.2
Lot Number
Type
21.2
±0.3
φ
3.2
±0.1
Plastic Mold Package Type
Flammability: UL94V-0
Terminal Connections
4.7
max.
20.0
min.
3.0
0.6
–0.1
+0.2
2.0
1.0
–0.1
3.5
+0.2
q
w
e
r
t
5.45×4
5.45
q
w
e
r
t
Switching Output (backside of case)
Output Voltage Adjustment
Ground
Output Voltage Detection
Input
Weight: Approx. 14.5g
s
Block Diagram
5
R1
Tr
1
1
s
Ta-PD Characteristics
24
Without Mica
150×150×2(3.3°C/W) With Silicone Grease
Heatsink: Aluminum
Unit: mm
R2
R3
M1
Tr
2
R4
R5
R6
2
C1
C2
R8
R7
4
Power Dissipation P
D
(W)
Ref. Voltage Circuit
D1
20
16
100×100×2(5.2°C/W)
12
75×75×2(7.6°C/W)
8
Without heatsink
4
3
0
–20
0
60
80
20
40
Ambient Temperature Ta(°C)
100
s
Standard External Circuit
V
IN
5
DC Input
+
1000µF
–
GND
GND
1000µF
4
3
+
1
DC Output
L
s
Variable Output Voltage Circuit
V
out
V
IN
5
DC Input
+
–
GND
1000
µF
VR
2
4
3
2
1
L
V
OUT
VR
1
+
1000
µF
DC Output
GND
Type
STR2005
STR2012
STR2013
STR2015
STR2024
Inductance L
200µH
300µH
300µH
350µH
400µH
VR
1
: V
OUT
down
VR
2
: V
OUT
up
10
STR2000 Series Typical Characteristics (Ta=25°C)
s
STR2005
Rise Characteristics
10
Efficiency Characteristics
100
90
8
Output Voltage V
O
(V)
80
Efficiency
η
(%)
6
V
IN
=11V
20V
70
60
50
40
30
30V
40V
I
O
=0A
1A, 2A
4
2
0
0
2
4
6
8
10
12
14
16
18
20
0
0
0.5
1.0
1.5
2.0
2.5
Input Voltage V
IN
(V)
Output Current I
O
(A)
s
STR2012
Rise Characteristics
20
100
90
Output Voltage V
O
(V)
Efficiency Characteristics
15
Efficiency
η
(%)
I
O
=0A, 1A
2A
10
80
70
60
50
40
V
IN
=18V
24V
30V
35V
45V 40V
5
0
0
5
10
15
20
25
30
35
40
45
0
0
0.5
1.0
1.5
2.0
2.5
Input Voltage V
IN
(V)
Output Current I
O
(A)
s
STR2024
Rise Characteristics
30
25
I
O
=0A, 1A
2A
Efficiency
η
(%)
Efficiency Characteristics
100
90
80
70
60
50
V
IN
=30V
35V
40V
45V
50V
Output Voltage V
O
(V)
20
15
10
5
0
40
0
5
10
15
20
25
30
35
40
45
0
0
0.5
1.0
1.5
2.0
2.5
Input Voltage V
IN
(V)
Output Current I
O
(A)
11
Microcontroller MCU
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