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STA821M PDF预览

STA821M

更新时间： 2024-09-28 06:14:31
品牌 Logo 应用领域
三垦 - SANKEN 稳压器开关式稳压器或控制器电源电路二极管开关式控制器
页数 文件大小 规格书
2页 432K
描述
Separate Excitation Switching Mode Regulator ICs with Flywheel Diode

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中文翻译

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STA821M 技术参数

生命周期：Obsolete零件包装代码：SIP
包装说明：SIP,针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.82
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING REGULATOR
最大输入电压：30 V最小输入电压：7 V
标称输入电压：20 VJESD-30 代码：R-PZIP-T8
长度：20.15 mm功能数量：1
端子数量：8最高工作温度：80 °C
最低工作温度：-30 °C最大输出电流：3.1 A
封装主体材料：PLASTIC/EPOXY封装代码：SIP
封装形状：RECTANGULAR封装形式：IN-LINE
认证状态：Not Qualified座面最大高度：11.7 mm
表面贴装：NO切换器配置：BUCK
最大切换频率：110 kHz温度等级：COMMERCIAL EXTENDED
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：ZIG-ZAG宽度：4 mm
Base Number Matches：1

STA821M 数据手册

 浏览型号STA821M的Datasheet PDF文件第2页 
1-1-2 Switching Mode Regulator ICs  
STA820M Series Separate Excitation Switching Mode Regulator ICs with Flywheel Diode  
■Features  
■Lineup  
• Output current: 3A  
Part Number  
STA821M  
Output Voltage (V)  
5
• High efficiency: TYP 83% (STA821M)  
• Built-in flywheel diode (Schottky-barrier diode)  
Output voltage: 3.3V, 9V, 12V; adjustable types currently being planned  
• Requires only 3 discrete components: output  
coil, input and output capacitors  
■Absolute Maximum Ratings*1  
• Phase correction and output voltage  
adjustment performed internally  
Parameter  
Symbol  
Ratings  
Unit  
V
DC Input Voltage  
VIN  
31  
• Built-in reference oscillator (110kHz)  
Output Current  
IO  
3
A
PD1  
PD2  
Tj  
18.2 (With infinite heatsink)  
W
• Built-in foldback-overcurrent and thermal  
protection circuits  
Power Dissipation*2  
2.7 (Without heatsink, stand-alone operation)  
W
Junction Temperature  
+125  
–40 to +125  
5.5  
°C  
• Built-in ON/OFF circuit (soft start available)  
Storage Temperature  
Tstg  
θj-c  
°C  
Thermal Resistance (Junction to Case)  
Thermal Resistance (Junction to Ambient Air)  
°C/W  
°C/W  
■Applications  
θj-a  
37  
• Power supplies for telecommunication  
equipment  
*1: The absolute maximum ratings show the destructive limit. No parameter should exceed the ratings in transient or  
normal operations.  
• On-board local power supplies  
• OA equipment  
*2: Limited by thermal protection.  
• For stabilization of the secondary-side output  
voltage of switching power supplies  
■Recommended Operating Conditions*1  
Ratings  
Parameter  
Symbol  
STA821M  
Unit  
min.  
7
max.  
30  
DC Input Voltage Range  
Output Current Range*2  
VIN  
IO  
V
A
0
3
Operating Junction Temperature Range  
Ambient Temperature Range*2  
Tjop  
Top  
–30  
–30  
+125  
+80  
°C  
°C  
*1: The recommended operating conditions show the operating conditions required for the normal circuit function described in the electrical characteristics. These conditions must be  
followed in actual use.  
*2: Limited by Ta-PD characteristics.  
■Electrical Characteristics  
(Ta=25°C)  
Ratings  
Parameter  
Symbol  
STA821M  
Unit  
min.  
4.8  
typ.  
max.  
5.2  
VO  
5.0  
V
Output Voltage  
Conditions  
η
VIN=20V, IO=1A  
83  
Efficiency*1  
%
Conditions  
fO  
VIN=20V, IO=1A  
110  
kHz  
mV  
mV  
Oscillation Frequency  
Line Regulation  
Conditions  
VLine  
VIN=20V, IO=1A  
40  
100  
40  
Conditions  
VLoad  
VIN=10 to 30V, IO=1A  
10  
VIN=20V, IO=0.5 to 1.5A  
0.5  
Load Regulation  
Conditions  
∆VO/∆T  
IS  
Temperature Coefficient of Output Voltage  
mV/°C  
3.1  
15  
Overcurrent Protection Starting  
Current  
A
Conditions  
VSSL  
VIN=20V  
Low Level Voltage  
ON/OFF  
Terminal*2  
0.2  
V
ISSL  
25  
VSSL=0.2V  
4
35  
Outflow Current  
at Low Voltage  
µA  
Conditions  
Iq  
mA  
Quiescent Circuit Current  
Conditions  
VIN=20V, IO=0A  
*1: Efficiency is calculated from the following formula.  
VO·IO  
η(%) =  
× 100  
VIN·IIN  
STA821M  
STA821M  
STA821M  
*2: Pin 7 is the ON/OFF pin. Soft start at power on can be performed by connecting a  
capacitor 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. ON/OFF-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.  
7
ON/OFF  
7
ON/OFF  
7
ON/OFF  
C3  
C3  
V
O. ON/OFF  
Soft start  
Soft start  
+VO. ON/OFF  
ICs  
88  
12

中文翻译

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