A5995 Datasheet, PDF (1/12 Pages) Allegro MicroSystems – DMOS Dual Full-Bridge PWM Motor Driver

A5995
DMOS Dual Full-Bridge PWM Motor Driver
FEATURES AND BENEFITS
• 40 V output rating
• Two 3.2 A DC motor drivers
• Synchronous rectification
• Internal undervoltage lockout (UVLO)
• Thermal shutdown circuitry
• Crossover-current protection
• Very thin profile QFN package
• Overcurrent protection
• Low-power sleep mode
• 3.3 and 5 V compatible logic supply
Package: 36-pin QFN with exposed thermal pad
0.90 mm nominal height (suffix EV)
DESCRIPTION
The A5995 is designed to operate at voltages up to 40 V while driving
two DC motors at currents up to 3.2 A. The A5995 includes a fixed
off-time pulse-width modulation (PWM) regulator for current control.
The DC motors are controlled using standard PHASE and ENABLE
signals. Fast or slow current decay is selected via the MODE pin.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation.
Protection features include thermal shutdown with hysteresis,
undervoltage lockout (UVLO), crossover-current and short-circuit
protection. Special power-up sequencing is not required.
TheA5995 is supplied in a leadless 6 mm × 6 mm × 0.9 mm, 36-pin QFN
package with exposed power tab for enhanced thermal performance.
The package is lead (Pb) free, with 100% matte-tin leadframe plating.
Not to scale
Microcontroller or
Controller Logic
A5995-DS, Rev. 1
0.1 µF
50 V
0.1 µF
50 V
CP1 CP2 VCP VBB VBB
100 µF
50 V
SLEEPn
OUT1A
OUT1A
MODE1
PHASE1
ENABLE1
VREF1
MODE2
PHASE2
ENABLE2
VREF2
A5995
OUT1B
OUT1B
SENSE1
SENSE1
OUT2A
OUT2A
OUT2B
OUT2B
GND
GND
SENSE2
SENSE2
GND GND
Figure 1:Typical Application Circuit
0.22 µF
50 V