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SG1844L-DESC-TR

更新时间： 2023-03-15 00:00:00
品牌 Logo 应用领域
美高森美 - MICROSEMI 开关
页数 文件大小 规格书
19页 752K
描述
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, CQCC20

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SG1844L-DESC-TR 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：QCCN, LCC20,.35SQReach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.9模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：25 V最小输入电压：12 V
标称输入电压：15 VJESD-30 代码：S-CQCC-N20
JESD-609代码：e0长度：8.89 mm
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-55 °C
最大输出电流：1 A封装主体材料：CERAMIC, METAL-SEALED COFIRED
封装代码：QCCN封装等效代码：LCC20,.35SQ
封装形状：SQUARE封装形式：CHIP CARRIER
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
筛选级别：38535Q/M;38534H;883B座面最大高度：2.286 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：500 kHz
技术：BIPOLAR温度等级：MILITARY
端子面层：TIN LEAD端子形式：NO LEAD
端子节距：1.27 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.89 mm

SG1844L-DESC-TR 数据手册

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SG1844/SG1845/SG3844/SG3845  
Current Mode PWM Controller  
Features  
Description  
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Optimized for Off-Line Control  
The SG1844/45 family of control ICs provides all the  
required features to implement off-line Fixed  
Frequency, Current-mode switching power supplies  
with a minimum number of external components.  
Current-mode architecture demonstrates improved line  
regulation, improved load regulation, pulse-by pulse  
current limiting and inherent protection of the power  
supply output switch.  
Low Start-Up Current (<1mA)  
Automatic Feed Forward Compensation  
Trimmed Oscillator  
Discharge Current  
Pulse-By-Pulse Current Limiting  
Enhanced Load Response Characteristics  
Undervoltage Lockout with 6V Hysteresis  
(SG1844 only)  
The Bandgap reference is trimmed to ±1% over  
temperature. Oscillator discharge current is trimmed to  
less than ±10%. The SG1844/45 has under-voltage  
lockout, current-limiting circuitry and start-up current of  
less than 1mA. The totem-pole output is optimized to  
drive the gate of a power MOSFET. The output is low  
in the off state to provide direct interface to an N-  
channel device. Both operate up to a maximum duty  
cycle range of zero to <50% due to an internal toggle  
flip-flop which blanks the output off every other clock  
cycle. The SG1844/45 is specified for operation over  
the full military ambient temperature range of -55°C to  
125°C. The SG3844/45 is designed for the commercial  
range of 0°C to 70°C.  
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Double Pulse Suppression  
High-Current Totem-Pole Output  
Internally Trimmed Bandgap Reference  
500kHz Operation  
Under-voltage Lockout  
SG1844 - 16 Volts  
SG1845 - 8.4 Volts  
.
Low Shoot-through Current <75mA Over  
Temperature  
Application  
. Available to MIL-STD-883  
. Available to DSCC  
– Standard Microcircuit Drawing (SMD)  
. SGR1844/45 Rad-Tolerant Version Available  
Product Highlight  
RST  
IST  
AC  
INPUT  
Vcc  
SG3844  
Figure 1 · Product Highlight  
November 2014 Rev. 1.7  
www.microsemi.com  
© 2014 Microsemi Corporation- Analog Mixed Signal Group  
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