Isolated monolithic flyback regulator simplifies design, eliminates optocoupler
August 02, 2010 // Paul Buckley
Linear Technology Corporation has unveiled an isolated monolithic flyback switching regulator that simplifies the design of an isolated DC/DC converter.
No opto-isolator, third winding or signal transformer are required for feedback since the output voltage is sensed from the primary-side flyback signal. The LT3575 operates over a 3 V to 40 V input voltage range, has a 2.5 A power switch and delivers up to 14 Watts of output power, making it well suited for a wide variety of industrial, medical, telecom, datacom and automotive applications.
The LT3575 operates in boundary mode, which is a variable frequency current-mode control switching scheme, typically resulting in +/-5 percent 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 off-the-shelf transformers, identified in the data sheet, 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 dropout regulator for IC power, programmable soft-start, undervoltage lockout, adjustable current limit and output voltage temperature compensation.
Summary of Features: LT3575
- VIN Range from 3 V to 40 V
- Onboard 2.5 A, 60 V Integrated Power Switch
- No Transformer, Third Winding or Opto-Isolator Required for Feedback
- Current-Mode Control
- Boundary-Mode Operation
- VOUT Set with Two External Resistors
- Off-the-Shelf Transformers
- Programmable Soft-Start
- Programmable Undervoltage Lockout
- Output Voltage Temperature Compensation
- Adjustable Current Limit
Related link: LT3575 All news
Bosch brings electronic fuel system, connectivity to Asian motorbikes
October 31, 2014
With an electronically controlled fuel injection system for motorcycles, supplier Bosch is offering a more efficient alternative ...
NXP extends NFC ecosystem to the car
Japan's MegaChips to buy MEMS maker SiTime
Freescale CEO: 'IoT isn't just buzz'
3D prints world's best inverter
Research project significantly improves electronics reliability
October 29, 2014
The RESCAR 2.0 research project helps to improve reliability and resilience of electronic systems in vehicles, in particular ...
Netscout Acquires Communications Businesses From Danaher
"Quality happens at the system level, not just at the product level"
Some memories never die
- Wireless Power User Guide
- Secure is the New Smart
- 5 Best Practices for Designing Flexible Test Stations
- Intelligent PLCs Expand the Internet of Things
InterviewFreescale CEO: 'IoT isn't just buzz'
Coming after the solid third quarter results that produced higher operating margins and improving cash flow, Freescale Semiconductor's CEO Gregg Lowe had every reason to be chipper and lively when EE Times ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Oscium is giving away three of its iMSO-204L dual analogue iOS oscilloscopes, worth USD400 each. Designed with native Lightning compatibility, the iMSO-204L transforms the iPad, iPhone, and iPod touch into an ultra-portable, two-channel oscilloscope.
Since Apple changed its connector, Oscium has been working to bring native compatibility to its customers. The third generation...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.