IC replaces mechanical relays and discrete driver circuits

Allegro
MicroSystems introduces a new n-channel power MOSFET driver capable of
isolating a three phase load by controlling the in-phase isolation MOSFETS. The
 A6862 motor driver IC is intended for
automotive systems that must meet Automotive Safety Integrity Level (ASIL)
requirements. The device was designed for EPS (electronic power steering)
systems, electric braking, and three-phase relay driver applications and is
supplied with detailed safety documentation.

 

AllegroMicro_A6862_feb2017

 

 

In safety
critical applications motor isolation is an essential requirement which is
currently addressed with discrete circuitry or relays in most competitive
solutions. The A6862 three-phase isolation driver replaces a relay driven motor
disconnect in automotive safety critical systems. It also provides the drive
for reverse battery protection and battery isolation.

 

The A6862
has three independent floating gate drive outputs to maintain the power MOSFETs
in the on state, or the off state, over the full supply range in the presence
of high phase-voltage slew rates. This new generation offers the addition of a
single input control, two independent activation inputs to put the device into
a low power sleep mode, and added gate to source protection to further assist
end users to achieve critical system safety goals. The A6862KLPTR-T is
available in a 16-lead TSSOP package (suffix LP) with an exposed pad for
enhanced thermal performance. It is priced at $0.94 ea/1,000.  Allegro
MicroSystems
: www.allegromicro.com