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MAX17690_17

更新时间： 2024-01-06 13:30:33
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
22页 802K
描述
60V, No-Opto Isolated Flyback Controller

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MAX17690_17 数据手册

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EVALUATION KIT AVAILABLE  
MAX17690  
60V, No-Opto Isolated Flyback Controller  
General Description  
Benefits and Features  
● 4.5V to 60V Input Voltage Range  
● No Optocoupler or Third Winding Required to Derive  
The MAX17690 is a peak current mode, fixed-frequency  
switching controller specifically designed for the isolated  
flyback topology operating in Discontinuous Conduction  
Mode (DCM). The device senses the isolated output  
voltage directly from the primary-side flyback waveform  
during the off-time of the primary switch. No auxiliary winding  
or optocoupler is required for output voltage regulation.  
Feedback Signal Across Isolation Boundary  
● 2A/4A Peak Source/Sink Gate Drive Currents  
● 50kHz to 250kHz Programmable Switching Frequency  
● Input EN/UVLO Feature  
● Input Overvoltage Protection  
The MAX17690 is designed to operate over a wide  
supply range from 4.5V to 60V. The switching frequency is  
programmable from 50kHz to 250kHz. A EN/UVLO pin  
allows the user to turn on/off the power supply precisely at  
the desired input voltage. The MAX17690 provides an input  
overvoltage protection through the OVI pin. The 7V internal  
LDO output of the MAX17690 makes it suitable for switching  
both logic-level and standard MOSFETs used in flyback  
converters. With 2A/4A source/sink currents, the MAX17690  
● Programmable Soft-Start  
● Hiccup-Mode Short-Circuit Protection  
● Thermal Shutdown Protection  
● -40°C to 125°C Operating Temperature Range  
● Space-Saving, 16-Pin 3 x 3 TQFN Package  
Applications  
● Isolated Flyback Converters  
● Wide-Range DC-Input Isolated Power Supplies  
● Industrial and Telecom Applications  
● PLC I/O modules  
is ideal for driving low R  
power MOSFETs with fast  
DS(ON)  
gate transition times. The MAX17690 provides an adjustable  
soft-start feature to limit the inrush current during startup.  
The MAX17690 provides temperature compensation for  
the output diode forward voltage drop. The MAX17690 has  
robust hiccup-protection and thermal protection schemes,  
and is available in a space-saving 16-pin 3mm x 3mm  
TQFN package with a temperature range from -40°C to 125°C.  
Ordering Information appears at end of data sheet.  
Application Circuit  
19-7970; Rev 1; 12/16  
1234567...22

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