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MILPITAS, CA March 18, 2015 Linear Technology Corporation announces a new military MP grade version of the LT3748, a high input voltage isolated flyback DC/DC controller. This device simplifies the design of an isolated DC/DC converter by not requiring an optoisolator, third winding or signal transformer for feedback since the output voltage is sensed from the primaryside flyback signal. The LT3748 operates over a 5V to 100V input voltage range and drives an external Nchannel power MOSFET, making it well suited for a wide variety of automotive, industrial, telecom and datacom applications.
The LT3748 operates in boundary mode, which is a variable frequency current mode control switching scheme, resulting in +/5% typical regulation over the full line, load and temperature range. Boundary mode also permits the use of a smaller transformer compared to equivalent continuous conduction mode designs. The output voltage is easily set by two external resistors and the transformer turns ratio. Several offtheshelf transformers are identified in the data sheet that can be used for numerous applications. The high level of integration and the use of boundary mode operation results in a simple, clean application solution to the traditionally tough problem of isolated power delivery.
Additional features include an onboard low drop regulator for IC power, programmable soft start, undervoltage lockout, adjustable current limit and output voltage temperature compensation.
The LT3748MP operating junction temperature is from 55°C to 150°C and the device is housed in a MSOP16 package with 4 pins removed for additional high voltage pin spacing. The 1,000 piece price starts at $9.25 each. For more information, visit www.linear.com/product/LT3748.
55°C to 150°C Junction Temperature
Operation
VIN Range from 5V to 100V
No OptoIsolator, Transformer or Third
Winding Required for Feedback Drives External Nchannel Power MOSFET
Current Mode Control
Boundary Mode Operation
VOUT Set with Two External Resistors
100V Isolated Flyback Operates Over 55°C to 150°COfftheShelf Transformers Programmable SoftStart Programmable Under Voltage Lockout Output Voltage Temperature Compensation
Click Photo for HighRes ImageThe USA list pricing shown is for budgetary use only. International prices may differ due to local duties, taxes, fees and exchange rates.
About Linear Technology
Linear Technology Corporation, a member of the S&P 500, has been designing, manufacturing and marketing a broad line of high performance analog integrated circuits for major companies worldwide for over three decades. The Company's products provide an essential bridge between our analog world and the digital electronics in communications, networking, industrial, automotive, computer, medical, instrumentation, consumer, and military and aerospace systems. Linear Technology produces power management, data conversion, signal conditioning, RF and
interface ICs, µModule® subsystems, and wireless sensor network products. For more information, visit
www.linear.com.
, LT, LTC, LTM, Linear Technology, the Linear logo and &µModule are registered trademarks of Linear
Technology Corp. All other trademarks are the property of their respective owners.
John Hamburger
Tel: (408) 4321900 ext. 2419 jhamburger@linear.com
Doug Dickinson
Tel: (408) 432 1900 ext. 2233 ddickinson@linear.com
Fanny Lau
Tel: 85224280303 flau@linear.com
Angela Ao
Tel: (8610)6522 8081 angela.ao@ebacomms.com
Yoshikazu Funasaki Tel: 81352267291 yfunasaki@linear.com
Takashi Matsuda
Tel: +81332558411 linear@chugaiad.co.jp
Desiree Park
Tel: +8225656625 desiree@ezwire.com
Alice Wang
Tel: +886228974705 alice@ezwire.com
Ralf Stegmann
Tel: +49 (0) 7131923411 ralf@ezwire.com
Alan Timmins
Tel: +441252629937 alan@ezwire.com
Simona Labianca
Tel: +39 340 0571697 simona@ezwire.com
Clotilde Zeller
Tel: +33 1 4614 87 09 clotilde@ezwire.com
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