Fremont Micro Devices Announces Off-Line Constant Current/Voltage Controllers

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The FT838D and FT838NB Target Low Power Switching Mode Adaptor and Charger designs.

Fremont Micro Devices USA Inc. announced the FT838D and FT838NB, cost effective and high performance AC/DC power supply controller Integrated Circuits. These devices enable off-line switching mode, power supply applications including battery charger and adaptors for cell phones, PDA’s, MP3 players. Additionally, they support stand by and auxiliary power supplies for Set Top Boxes.

“The FT838D and 838NB are the latest additions to the portfolio of Fremont Micro Devices Power Management solutions. The two integrated circuits are delivered in three different versions with built in cable compensation capability of 3%, 6% or 9%. Our proprietary technology enables fast dynamic response with no audible noise over the entire operating range for applications from 1W to 18W output,” said, Jim Panfil, Vice President of Sales and Marketing, Fremont Micro Devices USA. “Highly integrated functions like Under Voltage Lock-out, Leading Edge Banking plus the extremely low operating current of 500uA reduce power consumption and improve system reliability,” he added.

Start up control of these devices is excellent because they have a 2uA start up current. A large value startup resistor with low-wattage can be used to supply the start-up power for the controller. This minimizes the power loss in operation and allows quick start The output cable compensation provides a constant output voltage over the entire load rang in the constant voltage mode. As the converter load increases from no-load to the peak current load, the voltage drop introduced across the output cable is compensated by increasing the feedback pin reference voltage.

The FT838D is supplied in a SOT23-5 package has a list price of $0.08 for volume orders of 10ku.

The FT838NB is in a SOP-8 package has a list price of $0.10 for volume orders of 10ku.

About Fremont Micro Devices USA Inc.

Headquartered in Fremont, CA, Fremont Micro Devices USA, Inc. ( [ __title__ ]) is a semiconductor supplier whose products are offered through a global network of sales representatives and distributors in Europe, North America and Asia. FMD recently announced the cumulative shipment of one (1) Billion Serial EEPROM IC’s. The key members of the management team have extensive product development, design, finance and sales experience with leading Silicon Valley semiconductor companies

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