comment on this article

Miniature overvoltage clamp offers protection for portable equipment

Miniature overvoltage clamp offers protection for portable equipment

Diodes has introduced a new overvoltage clamp for the protection of power management ics in portable applications. Provided in a 1.1 x 1.4 x 0.8mm W-DFN1114-3 package, the AP9060 is suitable for the latest generation battery backed products including smartphones and tablets.

Supporting a battery charger output range of 3 to 30V, the device passes the voltage through to the ic only up to a safe clamp voltage limit, which is factory set at 11V. The AP9060's feedback loop maintains the clamped output voltage level by backing off the drive to its P channel mosfet switch. With an ultra low bias current, the device is also designed to minimise self heating, thereby increasing reliability.

In addition, the AP9060's use of a low resistance P channel mosfet as the pass element ensures that any EMI issues are removed. This is achieved by avoiding noise generation on the input supply circuit normally associated with the charge pump of alternative N channel mosfet solutions.

The AP9060 also supports reverse current operation, allowing it to pass up to a maximum of 1A from the ic to a load connected to a usb port.

Simon Fogg

Comment on this article

This material is protected by Findlay Media copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team.

Enjoy this story? People who read this article also read...

What you think about this article:

Add your comments


Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

Related Articles

IoT development kit

Imagination Technologies has launched the Creator Ci40 development kit, ...

Using a new knob

The move to push semiconductor manufacturing processes to ever smaller ...

EMD Forum & Seminar

The evening will start with a short seminar of speakers from the EMD Forum and ...

Between the layers

ZofzPCB is a free 3D Gerber viewer that allows designers to see inside the ...

What’s in a name?

A month after rumours started to appear, ON Semiconductor has confirmed that it ...

Making it happen

Speaking at last week’s second annual ARM Forum at London’s Science Museum, the ...

Interesting times

It has certainly been an interesting year for chip giant Qualcomm. Revenues are ...