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SI-8000SD_11

更新时间： 2024-11-25 12:20:31
品牌 Logo 应用领域
三垦 - SANKEN 开关
页数 文件大小 规格书
2页 74K
描述
Surface Mount, Separate Excitation Step-down Switching Mode

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SI-8000SD_11 数据手册

 浏览型号SI-8000SD_11的Datasheet PDF文件第2页 
1-1-3 DC/DC Converter ICs  
SI-8000SD Series Surface Mount, Separate Excitation Step-down Switching Mode  
■Features  
■Lineup  
• Surface-mount package (TO263-5)  
Part Number  
SI-8033SD  
3.3  
SI-8050SD  
5.0  
VO (V)  
• Output current: 3.0A  
IO (A)  
3
• High efficiency: 79% typ. (SI-8033SD), 84%  
typ. (SI-8050SD)  
■Absolute Maximum Ratings  
• Requires only 4 discrete external components  
Parameter  
Symbol  
Ratings  
43*1  
Unit  
V
Conditions  
• Internally-adjusted phase correction and  
output voltage  
DC Input Voltage  
VIN  
When mounted on glass-epoxy board 40 × 40 mm  
Power Dissipation*2  
PD  
3
W
• Built-in reference oscillator (60kHz)  
(copper area: 100%)  
Junction Temperature  
Tj  
+125  
–40 to +125  
3
°C  
°C  
• Built-in overcurrent and thermal protection  
circuits  
Storage Temperature  
Tstg  
θj-c  
Thermal Resistance (Junction to Case)  
°C/W  
• Output ON/OFF available  
Thermal Resistance  
(Junction to Ambient Air)  
When mounted on glass-epoxy board 40 × 40 mm  
(copper area: 100%)  
θj-a  
33.3  
°C/W  
• Soft start available by S.S pin  
*1: 35V for SI-8033SD  
*2: Limited by thermal protection circuit.  
■Applications  
• Power supplies for telecommunication equipment  
• Onboard local power supplies  
■Recommended Operating Conditions  
Ratings  
Parameter  
Symbol  
Unit  
SI-8033SD  
5.5 to 28  
SI-8050SD  
7 to 40  
DC Input Voltage Range  
VIN1  
IO  
V
A
Output Current Range*  
0 to 3.0  
Operating Junction Temperature Range  
Operating Temperature Range*  
Tjop  
Top  
–30 to +125  
–30 to +125  
°C  
°C  
*: Limited by Ta-PD characteristics.  
■Electrical Characteristics  
(Ta=25°C)  
Ratings  
Parameter  
Symbol  
SI-8033SD  
SI-8050SD  
Unit  
min.  
3.17  
typ.  
max.  
3.43  
min.  
typ.  
max.  
5.2  
VO  
3.3  
4.8  
5.0  
Output Voltage  
V
Conditions  
η
VIN=15V, IO=1A  
VIN=20V, IO=1A  
79  
VIN=15V, IO=1A  
60  
84  
Efficiency  
%
Conditions  
f
VIN=20V, IO=1A  
60  
Oscillation Frequency  
Line Regulation  
kHZ  
mV  
Conditions  
∆VOLINE  
Conditions  
∆VOLOAD  
Conditions  
∆VO/∆Ta  
IS1  
VIN=15V, IO=1A  
25  
VIN=20V, IO=1A  
80  
30  
40  
VIN=10 to 30V, IO=1A  
10  
100  
40  
VIN=8 to 28V, IO=1A  
10  
VIN=15V, IO=0.5 to 1.5A  
±0.5  
Load Regulation  
mV  
VIN=20V, IO=0.5 to 1.5A  
Temperature Coefficient of Output Voltage  
±0.5  
mV/°C  
Overcurrent Protection  
Starting Current  
3.1  
20  
3.1  
20  
A
V
Conditions  
VSSL  
VIN=15V  
0.2  
VIN=20V  
0.2  
Low-Level Voltage  
Soft  
Start Pin*  
Outflow Current at  
Low Voltage  
ISSL  
30  
40  
30  
40  
µA  
Conditions  
VSSL=0.2V  
* Pin 5 is a soft start pin. Soft start at power on can be performed with a capacitor connected to  
this pin.  
SI-8000SD  
SI-8000SD  
SI-8000SD  
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.  
5
ON/OFF  
5
ON/OFF  
C3  
5
ON/OFF  
C3  
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.  
VOUT. ON/OFF  
Soft start  
Soft start  
+VOUT. ON/OFF  
ICs  
20  
12

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