Product category: Power Supply ICs and Controllers
News Release from: Intersil | Subject: Endura ISL6161
Edited by the Electronicstalk Editorial Team on 17 April 2003
Hot-swap controller monitors
two rails at once
Intersil has developed the industry's first dual-rail hot-swap controller aimed primarily at the new PCI Express bus
The new Endura ISL6161 allows boards to be safely inserted and removed from live backplanes. This new IC controls both 12 and 3.3V power buses, offering programmability and fast-response protection. In addition to PCI Express, the ISL6161 is also well suited for general power distribution control and other hot-swap and hot plug applications.
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The ISL6161 dual-rail controller offers a rich feature set that includes: under-voltage monitoring and "power good" notification, programmable over-current detection and fault isolation, programmable current regulation, programmable current limit time to latch off, adjustable turn on ramp for soft-start and fast 1us response to a dead short.
This dual controller offers customers a high degree of integration that results in savings in board space and balance of materials costs.
Complete reference designs and evaluation boards are available.
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The ISL6161 provides Intersil's IntelliTrip dual-level current limiting technology for precise current control and protection.
For overcurrent protection, the voltage across either sense resistor is monitored and compared to its user-programmed current-regulation voltage threshold value.
When the voltage exceeds the current-regulation threshold, the controller enters the current regulation mode, holding the current at the programmed level until either the overcurrent event passes, in which case the mosfet is again fully enhanced and the C(TIM) capacitor is discharged, or the programmed time out period expires, in which case both the FETs are latched off.
The IC responds to a severe overcurrent load (more than three times the programmed current limit) by turning off the FET in less than 1us.
The controller is reset on the rising edge on the enable-bar pin and is turned on by the enable-bar pin being driven low.
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