04 July 2012 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. Author Simon Fogg Comment on this article Websites http://diodes.com/ Companies Diodes Incorporated This material is protected by MA Business copyright See Terms and Conditions. One-off usage is permitted but bulk copying is not. For multiple copies contact the sales team. What you think about this article: Add your comments Name Email 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.