Product category:
Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: ACS760
Edited by the Electronicstalk Editorial
Team on 23 August 2007
Hot-swap protection for 12V systems
Hot-swap protection IC combines Hall-effect current sensing technology with hot-swap control circuitry, resulting in a highly efficient integrated controller.
New from Allegro MicroSystems Europe is a hot-swap protection IC designed for 12V high-side applications The ACS760 combines Allegro's Hall-effect current sensing technology with hot-swap control circuitry, resulting in a highly efficient integrated controller
This article was originally published on Electronicstalk on 30 Aug 2000 at 8.00am (UK)
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No external sense resistor is required, resulting in greatly reduced I2R losses in the power path.
The ACS760 incorporates an external high-side FET gate drive, and produces an analogue output voltage (factory trimmed for gain and offset) which is proportional to the current sensed in the device lead-frame.
The soft-start/hot-swap function is accessed via the logic "enable" input pin and an optional user-defined soft-start capacitor .
When the ACS760 is externally enabled and the voltage rail is above the internal undervoltage lockout threshold, the internal charge pump drives the gate of the external FET.
When a fault is detected, the gate is disabled while simultaneously alerting the application that a fault has occurred.
Three levels of fault protection are integrated within the ACS760: 240VA power fault protection with user-programmable delay; user-programmable overcurrent fault threshold with programmable delay; and short-circuit protection, which disables the gate in less then 2us.
In the event of the external high-side FET failing in a short-circuit condition, the ACS760 detects the failure, immediately disables the gate, and alerts the host system.
The IC is designed for single-supply operation from 10.8 to 13.2V, and has 1.5mohm internal conductor resistance.
It is protected against electrostatic discharge at up to 2kV for all pins.
The ACS760 is supplied in a 24-lead QSOP package (suffix LF) which is lead (Pb) free and RoHS compliant.
Operating temperature range is -40 to +85C.
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