Semtech Reveals New Current-Based Synchronous Rectifier Topology for Consumer Devices
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The new SR controller, TS4305, is designed to enhance efficiency in AC/DC adapters and can be used in conjunction with MOSFETs (metal-oxide semiconductor field-effect transistor) to reduce losses in traditional schottky rectification diodes, resulting in a smaller and lower cost solution. Semtech's SR controller is based on a new innovative design that senses the current crossing the MOSFET and offers external adjustable turn-on and turn-off thresholds. While many solutions use a voltage detection approach, Semtech's use of current sensing offers many advantages. When used in AC/DC adapters, the SR Controller enables simpler external circuitry and offers precise turn-on and turn-off timing. The technology also includes the unique ability to parallel with schottky diode which is more efficient during light-load operations. All of these advantages results in solutions with higher efficiency and higher power density.
"Semtech's new SR controller is differentiated in the market in three key feature areas: current sensing, adjustable thresholds and programmable gate drive voltages," said Francois Ricodeau, Product Line Manager for Semtech's Power and
"Consumer market demands are changing and productivity has become a key focus," said
Key Features of the Low-side Synchronous Rectifier Controller
- Accurate current sensing enables higher efficiency
- Programmable gate drive voltages (5V or 10V) in-line program by customer
- Minimum ON and OFF time to minimize GATE turn-on oscillation
- Rectifier turn on/off thresholds set with external resistors
- Wide supply range 4.5V to 24V
- 2A sink, 1A source gate drive
- Available in 2mm x 2mm DFN-8 & 4mm x 5mm or SOIC-8 packages
- Product is lead-free, halogen free, RoHS / WEEE
Pricing and Availability
The SR controller (TS4305) is available immediately in production quantities and is priced at
Power Management Products
- View all power management products: www.semtech.com/power-management.
- Contact Semtech's customer service team for technical support or general product inquiries.
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Forward-Looking and Cautionary Statements
All statements contained herein that are not statements of historical fact, including statements that use the words "designed to" or other similar words or expressions, that describe Semtech Corporation's or its management's future plans, objectives or goals are "forward-looking statements" and are made pursuant to the Safe-Harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause the actual results of
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