Designed to provide the motor driver and power supply requirements for printers and office automation equipment. This integrated power IC incorporates two high current, high performance, full bridge outputs, capable of 1.5 A at 50 V. Additionally two power supply rails are provided for microprocessor or DSP supplies. A switching buck regulator steps the supply down to a low voltage output that is adjustable from 3.3 to 5 V. This voltage can be used to supply external 5 V rails, it also feeds back into the part and supplies the integrated linear regulator which is adjustable from 1 to 2.5 V.
The A3998 serial port provides flexible configuration for the dual full bridge motor driver. Two full bridges can be programmed to control one stepper motor or two DC motors. Both bridges have integrated fixed off-time PWM control with programmable decay mode selection.
The A3998 is supplied in a low profile, 32-contact QFN, 5 × 5 mm, 0.90 mm nominal height, with exposed thermal pad (suffix ET). The package is lead (Pb) free with 100% matte tin leadframe plating.
These parts are in production but have been determined to be LAST TIME BUY. This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available.
Date of status change: July 1, 2019.
Deadline for receipt of LAST TIME BUY orders: December 27, 2019.
Recommended Substitutions: Contact Allegro Sales
|Part Number||Package Type||Temperature||RoHS
|Part Composition /
|A3998SETTR-T||32-lead QFN||-20°C to 85°C||Yes||View Data||pre-EOL||Contact your
local sales rep
|APEK3998SET-01-T||DEMO BOARD||-20°C to 85°C||No||--||pre-EOL||Contact your
local sales rep
Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro’s product can reasonably be expected to cause bodily harm.