Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Embedded

Maxim PWM controllers reduce dc-dc converter size, cost

Posted: 03 Jun 2003 ?? ?Print Version ?Bookmark and Share

Keywords:maxim integrated products? max8540? max8541? pwm controller?

Maxim Integrated Products' MAX8540 current-mode PWM controller and MAX8541 voltage-mode PWM controller are targeted for use in isolated forward and flyback dc-dc converter modules.

The MAX8540/MAX8541 operate at 200kHz to 1MHz switching frequencies and synchronize to an external clock. These controllers permit optimization of magnetics design, providing an important performance advantage over competing products. An adjustable maximum duty cycle with voltage feed-forward reduces the transformer size by maintaining constant maximum primary volt-seconds over the input-voltage range.

Both controllers feature cycle-by-cycle, current-limit protection. The user can program the number of current-limited cycles needed to initiate the hiccup mode while at the same time ensuring startup into high-capacitance loads, which is a critical design challenge.

The products feature active-high and active-low enable controls and programmable undervoltage and overvoltage protection. It uses an integrated 9-ohm gate driver for low-power designs or an external gate driver for high-power designs.

They are available in 16-pin QSOP packages and are specified for the -40C to 85C temperature range. Prices start at $1.75 in 1,000-up units quantities.

Article Comments - Maxim PWM controllers reduce dc-dc c...
*? You can enter [0] more charecters.
*Verify code:


Visit Asia Webinars to learn about the latest in technology and get practical design tips.

Back to Top