High Side Drivers and Low Side Drivers

Power ICs, high side driver, low side driver, relay driverMany electronic systems today include some type of mechanical actuator, whether it is a solenoid, relay, or motor.  Typically such a system has an intelligent controller which communicates its commands to the various system actuators through low voltage logic level communications. This communication can be done through simple parallel communications. Complex systems might use one of many serial communication protocols such as Serial Parallel Interface (SPI). 

Most actuators are not able to respond directly to low voltage signals.  Driver ICs are needed to take these low voltage control signals as inputs and convert the digital commands into an analog voltage to drive the actuator.

Allegro specializes in the power interface role in which these driver ICs perform. These ICs are rated up to voltages of 60 V and may include automotive capable temperature ranges and diagnostic capabilities.

Please see below for our offering of High Side Driver, Low Side Driver and Relay Driver IC Solutions Used for Solenoid, Relay, and Motor Actuators:

Low Side Drivers
Part Number Output Voltage Output Current (per channel) Number of Outputs Description Serial Input Parallel Input High Side / Low Side Package
A2550K 50 3 × 250 mA 3 × low side
1 × LDO
3 channel low side relay driver / 5V regulator, POR, and watchdog No Yes Low Side eTSSOP-16
A3944K 50 N/A 6 Six channel low side MOSFET Pre-driver IC Yes N/A N/A eTSSOP-28
High Side Drivers
Part Number Output Voltage Output Current (per channel) Number of Outputs Description Serial Input Parallel Input High Side / Low Side Package
A3942K 60 4 × pre-drive 4 Four channel high side MOSFET pre-driver IC Yes Yes High Side TSSOP-38
A2982  50 8 × 350 mA 8 Eight channel high side driver IC No Yes High Side SOIC-20
A6850K 40 2 × 25 mA 2 Two channel high side protected switch with current monitor outputs No Yes High Side SOIC-8
UDN2987‑6  35 8 × 350 mA 8 Eight channel high side driver IC with over-current protection No Yes High Side SOIC-20
A6861K 50 3 × pre-drive 3 Three channel high side MOSFET gate driver No Yes High Side TSSOP-16
New as of October 2016
A6862K

50 3 × pre-drive
3 Three channel high side MOSFET gate driver
No Yes  (ENABLE, IG)
 High Side TSSOP-16

Note: "K" suffix denotes automotive grade product (AEC-Q100 qualified)

.

Copyright © 2017 Allegro MicroSystems, LLC

Sitemap  |  Privacy Policy  |  Contact Webmaster

Follow us on: LinkedIn YouTube Google+

Careers   |   Contact Sales   |   Home   |   Legal   |   Quality & Environment   |   Request Samples