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Saturday 26 May 2012
Products
Analogue / Linear / Mixed Signal ICs
Allegro LED driver has boost converter and current sink
Wednesday 15 February 2012
Allegro MicroSystems has a single-output white LED driver IC designed for backlighting applications, which integrates a current-mode boost converter with an internal power switch and one current sink.
The A8513 can operate from a single power supply from 4.5 to 40 V to accommodate start/stop, cold-crank and load-dump requirements.
The 2 MHz switching frequency of the boost converter allows the device to operate above the AM radio band.
The device monitors the state of the system to determine if any fault conditions occur, with a fault flag pin alerting the controller to possible fault conditions. If required, the fault flag can be used as part of a circuit to drive an external p-type FET to disconnect the input supply from the system in the event of a fault.
Built-in protection is provided against output short-circuit and overvoltage, open or shorted diode, open or shorted LED pin, shorted boost switch or inductor, shorted current-setting resistor, and IC overtemperature.
A dual-level cycle-by cycle current limit function provides soft start and protects the internal current switch against high-current overloads.
The A8513 is supplied in both eMSOP-10 and eTSSOP-16 packages.
www.allegromicro.com
The A8513 can operate from a single power supply from 4.5 to 40 V to accommodate start/stop, cold-crank and load-dump requirements.
The 2 MHz switching frequency of the boost converter allows the device to operate above the AM radio band.
The device monitors the state of the system to determine if any fault conditions occur, with a fault flag pin alerting the controller to possible fault conditions. If required, the fault flag can be used as part of a circuit to drive an external p-type FET to disconnect the input supply from the system in the event of a fault.
Built-in protection is provided against output short-circuit and overvoltage, open or shorted diode, open or shorted LED pin, shorted boost switch or inductor, shorted current-setting resistor, and IC overtemperature.
A dual-level cycle-by cycle current limit function provides soft start and protects the internal current switch against high-current overloads.
The A8513 is supplied in both eMSOP-10 and eTSSOP-16 packages.
www.allegromicro.com
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