SI-8120S PDF даташит
Спецификация SI-8120S изготовлена «ETC» и имеет функцию, называемую «Separate Excitation Step-down Switching Mode». |
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Детали детали
Номер произв | SI-8120S |
Описание | Separate Excitation Step-down Switching Mode |
Производители | ETC |
логотип |
2 Pages
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1-1-3 DC/DC Converter ICs
SI-8000S Series Full-Mold, Separate Excitation Step-down Switching Mode
■Features
• Compact full-mold package (equivalent to
TO220)
• Output current: 3.0A
• High efficiency: 79 to 91%
• Requires only 4 discrete components
• Internally-adjusted phase correction and output
voltage
• Built-in reference oscillator (60kHz)
• Built-in overcurrent and thermal protection
circuits
• Built-in soft start circuit (Output ON/OFF
available)
■Lineup
Part Number
VO(V)
IO(A)
SI-8033S
3.3
SI-8050S
5.0
SI-8090S
9.0
3.0
SI-8120S
12.0
■Absolute Maximum Ratings
Parameter
DC Input Voltage
Power Dissipation
Junction Temperature
Storage Temperature
SW Terminal Applied Reverse Voltage
Thermal Resistance(junction to case)
Symbol
VIN
PD1
PD2
Tj
Tstg
VSW
θ j-c
*35V for SI-8033S
Ratings
43*
18(With infinite heatsink)
1.5(Without heatsink, stand-alone operation)
+125
–40 to +125
–1
5.5
■Applications
• Power supplies for telecommunication equip-
ment
• Onboard local power supplies
■Recommended Operating Conditions
Parameter
DC Input Voltage Range
Output Current Range
Operating Junction Temperature Range
Symbol
VIN
IO
Tjop
SI-8033S
5.5 to 28
SI-8050S
7 to 40
Ratings
SI-8090S
12 to 40
0 to 3.0
–30 to +125
SI-8120S
15 to 40
SI-8150S
18 to 40
SI-8150S
15.0
Unit
V
W
W
°C
°C
V
°C/W
Unit
V
A
°C
■Electrical Characteristics
Parameter
Output Voltage
SI-8000S*1
SI-8000SS
Efficiency
Oscillation Frequency
Line Regulation
Load Regulation
Temperature Coefficient of
Output Voltage
Symbol
VO
Conditions
η
Conditions
f
Conditions
∆VOLINE
Conditions
∆VOLOAD
Conditions
SI-8033S
min. typ. max.
3.17 3.30 3.43
3.234 3.30 3.366
VIN=15V, IO=1.0A
79
VIN=15V, IO=1.0A
60
VIN=15V, IO=1.0A
25 80
VIN=8 to 28V, IO=1.0A
10 30
VIN=15V, IO=0.5 to 1.5A
∆VO/∆Ta
±0.5
SI-8050S
min. typ. max.
4.80 5.00 5.20
4.90 5.00 5.10
VIN=20V, IO=1.0A
84
VIN=20V, IO=1.0A
60
VIN=20V, IO=1.0A
40 100
VIN=10 to 30V, IO=1.0A
10 40
VIN=20V, IO=0.5 to 1.5A
±0.5
Ratings
SI-8090S
min. typ. max.
8.55 9.00 9.45
VIN=21V, IO=1.0A
88
VIN=21V, IO=1.0A
60
VIN=21V, IO=1.0A
50 120
VIN=15 to 30V, IO=1.0A
10 40
VIN=21V, IO=0.5 to 1.5A
±1.0
SI-8120S
min. typ. max.
11.50 12.00 12.50
VIN=24V, IO=1.0A
90
VIN=24V, IO=1.0A
60
VIN=24V, IO=1.0A
60 130
VIN=18 to 30V, IO=1.0A
10 40
VIN=24V, IO=0.5 to 1.5A
±1.0
SI-8150S
min. typ. max.
14.25 15.00 15.75
VIN=25V, IO=1.0A
91
VIN=25V, IO=1.0A
60
VIN=25V, IO=1.0A
60 130
VIN=21 to 30V, IO=1.0A
10 40
VIN=25V, IO=0.5 to 1.5A
±1.0
(Ta=25°C)
Unit
V
%
kHZ
mV
mV
mV/ °C
Overcurrent Protection
Starting Current
Soft Low-Level Voltage
Start Pin*2
Outflow Current at
Low Voltage
IS1
Conditions
VSSL
ISSL
Conditions
3.1
VIN=15V
3.1
VIN=20V
3.1
VIN=21V
VSSL=0.2V
3.1
VIN=24V
3.1
VIN=25V
A
V
µA
*1:“S” may be printed to the right of the marking (except SI-8090S, SI-8120S, SI-8150S).
*2:Pin 5 is a soft start pin. Soft start at power on can be performed with a capacitor connected to
this pin.
The output can also be turned ON/OFF with this pin.
The output is stopped by setting the voltage of this pin to VSSL or lower.
Soft-start pin voltage can be changed with an open-collector drive circuit of a transistor.
When using both the soft-start and ON/OFF functions together, the discharge current from C3
flows into the ON/OFF control transistor. Therefore, limit the current securely to protect the
transistor if C3 capacitance is large.
The ON/OFF pin is pulled up to the power supply in the IC, so applying the external voltage is
prohibited.
If this pin is not used, leave it open.
SI-8000S
5 ON/OFF
VOUT. ON/OFF
SI-8000S
5 ON/OFF
C3
SI-8000S
5 ON/OFF
C3
Soft start
Soft start
+VOUT. ON/OFF
46 ICs
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SI-8000S Series
■External Dimensions (TO220F-5)
10.0±0.2
4.2±0.2
2.8±0.2
2.6±0.1
0.95±0.15
0.85
+0.2
–0.1
P1.7±0.7×4=6.8±0.7
0.45
+0.2
–0.1
3.9±0.7
(4.3)
8.2±0.7
1 23 45
Forming No. 1101
■Block Diagram
VIN 1
Reg.
OSC
OCP
Reset
Drive
2 SWOUT
Comp.
Amp.
TSD
4 VOS
VREF
5 S.S.
3 GND
■Typical Connection Diagram
VIN 1
VIN
2
SWOUT
L1
+
C1
GND
SI-8000S
D1
S.S GND
53
VOS
4
VO
+
C2
GND
■Ta-PD Characteristics
20
Infinite heatsink
15 200×200×2mm
(2.3°C/W)
100×100×2mm
10 (5.2°C/W)
With Silicone Grease
Heatsink: Aluminum
75×75×2mm
(7.6°C/W)
5
Without heatsink
0
–25 0
25 50 75 100 125
Operating Ambient Temperature Ta (°C)
Pin Assignment
q VIN
w SWOUT
e GND
r VOS
t S.S
Plastic Mold Package Type
Flammability: UL94V-0
Product Mass: Approx. 2.3g
(Unit : mm)
C1,2 : 1000µF
L1 : 150µH
D1 : RK46(Sanken)
PD=VO•IO
100 VO
–1 –VF•IO 1–
ηχ VIN
The efficiency depends on the input voltage and the output current.
Therefore, obtain the value from the efficiency graph and substi-
tute the percentage in the formula above.
VO : Output voltage
VIN : Input voltage
IO : Output current
ηx : Efficiency (%)
VF : Diode D1 forward voltage
0.5V(RK46)
Thermal design for D1 must be considered separately.
ICs 47
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