Product category: Circuit Protection Devices
News Release from: Maxim Integrated Products | Subject: MAX4959 and MAX4960
Edited by the Electronicstalk Editorial Team on 07 December 2007
Controllers protect low-voltage systems
Devices provide resistor-programmable overvoltage (6 to 28V) and undervoltage (5 to 28V) trip levels.
New from Maxim, the MAX4959 and MAX4960 are overvoltage-protection (OVP) controllers with battery-switchover functionality Designed to protect low-voltage systems up to 28V, these devices provide resistor-programmable overvoltage (6 to 28V) and undervoltage (5 to 28V) trip levels
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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To implement this OVP and prevent damage to protected components, the MAX4959 and MAX4960 turn off an external P-channel FET when the input voltage exceeds the overvoltage threshold.
Subsequently, they hold the external FET off until the input voltage rises above the undervoltage-lockout threshold.
These controllers also feature a controlbit pin that switches to the battery when the host system detects a disconnect at the AC adapter.
This combination of OVP and battery-switchover functionality makes the MAX4959 and MAX4960 ideal for low-voltage systems such as ultramobile PCs, notebooks, and camcorders.
The MAX4959 and MAX4960 provide +/-15kV ESD protection (Human Body Model) on the input when the input is bypassed with an external 1uF ceramic capacitor.
These controllers are fully specified over the -40 to +85C extended temperature range, and are available in tiny 2 x 2mm, 10-pin microDFN and 3 x 5mm, 10-pin microMAX packages.
Prices start at US $0.90 (1000-up).
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