A5950 Datasheet, PDF (1/11 Pages) Allegro MicroSystems – Motor lead short-to-ground protection

FEATURES AND BENEFITS
• Overcurrent protection (OCP)
• Motor lead short-to-ground protection
• Motor lead short-to-battery protection
• Motor short protection
• Low-power standby mode
• Fault output
• Adjustable current limit option
• Current-to-voltage output
• Synchronous rectification – high-side
• Internal UVLO
• Crossover-current protection
• Thermal warning and shutdown function
• AEC-Q100 Grade 1 qualified – K version
PACKAGES:
Not to scale
A5950
DC Motor Driver
DESCRIPTION
Designed for pulse-width-modulated (PWM) control of DC
motors, the A5950 is capable of peak output currents up to
±3 A and operating voltages up to 40 V.
Input terminals are provided for use in controlling the speed and
direction of a DC motor with externally applied PWM control
signals. Internal synchronous rectification control circuitry is
provided to lower power dissipation during PWM operation.
Internal circuit protection includes overcurrent protection,
motor lead short to ground or supply, thermal shutdown with
hysteresis, undervoltage monitoring of VBB, and crossover-
current protection.
TheA5950 is supplied in a low-profile 4 mm × 4 mm 16-contact
QFN (suffix “EU”) package with wettable flank option (suffix
“-P”), or a 16-lead eTSSOP (suffix “LP”), all three with exposed
power tab for enhanced thermal performance.
16-lead QFN
with exposed themal pad
(suffix EU, option -T)
16-lead QFN
with exposed themal pad
and wettable flank (suffix EU, option -P)
16-lead TSSOP
with exposed themal pad
(suffix LP)
FAULTn
RESETn
PHASE
ENABLE
MODE
OCLSEL
GND
VREF
A5950-DS, Rev. 2
MCO-0000177
Disable
OCL2
OCP
UVLO
TWarn
CHARGE
PUMP
CONTROL
LOGIC
7V
OCL1
OCL2
500 mV
÷10
VBB
Load
Supply
OUT1
OUT2
LSS
RSENSE (optional)
×5
AIOUT
Figure 1: Functional Block Diagram
May 11, 2017