A5929 Datasheet, PDF (1/17 Pages) Allegro MicroSystems – Automotive Full-Bridge MOSFET Driver

A5929
Automotive Full-Bridge MOSFET Driver
FEATURES AND BENEFITS
• High current Full-Bridge gate drive for n-channel
MOSFETs
• Cross-conduction protection
• 5.5 V to 50 V Supply Voltage Range
• Motor phase short to supply and short to ground
detection
• Undervoltage, overtemperature monitors
• Low Current Sleep Mode
PACKAGE:
24-Pin eTSSOP with exposed thermal pad (suffix LP)
Not to scale
DESCRIPTION
The A5929 is a full-bridge controller for use with n-channel
external power MOSFETs and is specifically designed for
automotive applications.
A unique charge pump regulator provides full (>10 V) gate
drive at battery voltages down to 7 V and allows the A5929
to operate with reduced gate drive at battery voltages down
to 5.5 V. A bootstrap capacitor is used to provide the above
battery supply voltage required for n-channel MOSFETs.
One logic level input is provided for each of the four power
MOSFETs in the full-bridge, allowing motors to be driven
with any PWM scheme defined by an external controller.
The power MOSFETs are protected from cross-conduction
by integrated crossover control.
Motor phase short-to-supply and short-to-ground detection
is provided by independent drain-source voltage monitors
on each MOSFET. Short faults, supply undervoltage, and
chip over-temperature conditions are indicated by a single
open drain fault output.
The A5929 is supplied in a 24-pin TSSOP power pack-
age with an exposed thermal pad (package type LP). This
package is available in lead (Pb) free versions, with 100%
matte-tin lead frame plating (suffix –T).
VDD
MCU
A5929
VBAT
A5929-DS
Typical Application Diagram