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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=25C)
Parameter DC Input Voltage DC Output Current Power Dissipation Operating Temperature Storage Temperature Thermal Resistance ( junction-to-case) Symbol VIN IO PD Top Tstg Rth(j-c) 45 2.0 (pulse 3.0) 75 (TC=25C) 15 (TC=100C) -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=25C)
Ratings Parameter Symbol STR2005 min DC Input Voltage Range VIN Condition Output Voltage VO 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
IO=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 VIN=24V, IO=1.0A 85 85 VIN=27V, IO=1.0A 85 VIN=27V, IO=1.0A 60 60 VIN=35V, IO=1.0A 85 VIN=35V, IO=1.0A 60 mV % V
Condition VIN=20V, IO=1.0A Efficiency
VOLINE VOLOAD RREJ Condition
72
Condition VIN=20V, IO=1.0A Line Regulation 50
VIN=24V, IO=1.0A 60 VIN=20 to 28V, IO=1.0A 100 VIN=24V, IO=0.5 to 1.5A 45 f=100 to 120Hz 45 100
Condition VIN=15 to 25V, IO=1.0A Load Regulation 100
VIN=23 to 31V, IO=1.0A VIN=30 to 40V, IO=1.0A 100 100 mV
Condition VIN=20V, IO=0.5 to 1.5A Ripple Rejection 45
VIN=27V, IO=0.5 to 1.5A VIN=35V, IO=0.5 to 1.5A 45 45 dB
Switching Frequency
f
25
25
25
25
25
kHz
Condition VIN=20V, IO=1.0A
VIN=24V, IO=1.0A
VIN=27V, IO=1.0A VIN=35V, IO=1.0A
9
STR2000 Series
s Outline Drawing/Terminal Connections (unit:mm)
36.00.3 24.40.2
12.00.3
3 0
6.0max. 2.00.2
Lot Number Type
21.20.3
3.20.1
Plastic Mold Package Type Flammability: UL94V-0 Terminal Connections
4.7max.
20.0min.
3.0
+0.2 0.6 -0.1
2.0 1.0 -0.1 3.5
+0.2 q w e r t
5.45x4 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 Tr1 1
s Ta-PD Characteristics
24 Without Mica 150x150x2(3.3C/W) With Silicone Grease Heatsink: Aluminum Unit: mm
R2 R3 M1 Tr2 R4 R5 R6 2 C1 C2 R8 R7 4
Power Dissipation PD(W)
Ref. Voltage Circuit
D1
20
16 100x100x2(5.2C/W) 12 75x75x2(7.6C/W) 8 Without heatsink
4 3
0 -20
0
60 80 20 40 Ambient Temperature Ta(C)
100
s Standard External Circuit
VIN 5 DC Input + 1000F - GND GND 1000F 4 3 + 1 DC Output
L
s Variable Output Voltage Circuit
Vout
VIN 5 DC Input + - GND 1000 F VR2 4 3 2 1
L
VOUT
VR1 + 1000 F
DC Output
GND
Type STR2005 STR2012 STR2013 STR2015 STR2024
Inductance L 200H 300H 300H 350H 400H
VR1 : VOUT down VR2 : VOUT up
10
STR2000 Series Typical Characteristics (Ta=25C)
s STR2005
Rise Characteristics
10
Efficiency Characteristics
100 90
8
Output Voltage VO (V)
80
Efficiency (%) 6
VIN=11V 20V
70 60 50 40 30 30V 40V
IO=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 VIN (V)
Output Current IO (A)
s STR2012
Rise Characteristics
20
100 90 Output Voltage VO (V)
Efficiency Characteristics
15
Efficiency (%)
IO=0A, 1A 2A 10
80 70 60 50 40 VIN=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 VIN (V)
Output Current IO (A)
s STR2024
Rise Characteristics
30 25 IO=0A, 1A 2A Efficiency (%)
Efficiency Characteristics
100 90 80 70 60 50 VIN=30V 35V 40V 45V 50V
Output Voltage VO (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 VIN (V)
Output Current IO (A)
11

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