Linear Technology Corp. has developed a high input voltage isolated flyback DC/DC controller with guaranteed operation for junction temperatures as high as 150°C.
The LT3748H does not require an opto-isolator, third winding or signal transformer for feedback, as the output voltage is sensed from the primary-side flyback signal. The LT3748 operates over a 5V to 100V input voltage range and drives an external N-channel power MOSFET, making it well suited for a wide variety of automotive, industrial, telecom and datacom applications.
-40°C to 150°C guaranteed junction temperature operation
VIN range from 5V to 100V
No opto-isolator, transformer or third winding required for feedback
Drives external N-Channel power MOSFET
Boundary mode operation
VOUT Set with two external resistors
Programmable undervoltage lockout
Output voltage temperature compensation
Pricing: In 1ku, starts at $3.71 each.
Availability: In a small MSOP-16 package with 4 pins removed for additional high voltage pin spacing.
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