A3936SEDT

Manufacturer Part NumberA3936SEDT
DescriptionPLCC44
ManufacturerAllegro Micro Systems, Inc.
A3936SEDT datasheet
 


Specifications of A3936SEDT

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ABSOLUTE MAXIMUM RATINGS
at T A = +25°C
Load Supply Voltage, V
........................... 50 V
BB
................................... ±3 A*
Output Current, I
OUT
Logic Supply Voltage, V
......................... 7.0 V
DD
Logic Input Voltage Range, V
IN
(t
>30 ns) .......... -0.3 V to V
+ 0.3 V
DD
W
(t
<30 ns) ................ -1.0V to V
W
DD
Sense Voltage, V
................................. 0.5 V
SENSE
Reference Voltage, V
................................ V
REF
Package Power Dissipation,
P
............................................... 3.9 W
D
Operating Temperature Range,
T
................................ -20°C to +85°C
A
Junction Temperature, T
......................... +150°C
J
Storage Temperature Range,
T
............................... -55°C to +150°C
S
* Output current rating may be limited by duty cycle,
ambient temperature, and heat sinking. Under any set of
conditions, do not exceed the specified current rating or a
junction temperature of 150°C.
A3936-DS Rev. 4
3936
DMOS THREE-PHASE
PWM MOTOR DRIVER
Designed for pulse-width modulated (PWM) current control of three-
phase brushless dc motors, the A3936SED is capable of peak output currents
to ± 3 A and operating voltages to 50 V. Internal fixed off-time PWM current-
control timing circuitry can be configured to operate in slow-, fast- and mixed-
decay modes.
Internal synchronous rectification control circuitry is provided to
improve power dissipation during PWM operation.
Internal circuit protection includes thermal shutdown with
+1V
hysteresis, and crossover current protection. Special power up sequencing is
not required.
DD
The A3936 is supplied in a 44-pin plastic PLCC with internally
fused leads (three on each side) for enhanced heat dissipation. These leads
are at ground potential and need no electrical isolation. This device is also
available in a lead (Pb) free version, with 100% matte tin leadframe plating.
Features
±3 A, 50 V Continuous Output Rating
r
Low
Outputs (typically 500 m
DS(on)
Configurable Mixed, Fast and Slow Current-Decay Modes
Synchronous Rectification for Low Power Dissipation
Internal UVLO and Thermal Shutdown Circuitry
Crossover-Current Protection
Tachometer Output for External Speed Control Loop
Selection Guide
*
Part Number
Pb-free
A3936SED-T
Yes
A3936SEDTR-T
Yes
*Pb-based variants are being phased out of the product line. The variants cited in this footnote are
in production but have been determined to be LAST TIME BUY. This classification indicates that
sale of this device is currently restricted to existing customer applications. The variants should not
be purchased for new design applications because obsolescence in the near future is probable.
Samples are no longer available. Status change: October 31, 2006. Deadline for receipt of LAST
TIME BUY orders: April 27, 2007. These variants include:
A3936SEDTR.
Ω
Ω
source, 315 m
sink)
Packing
27 per tube
450 per reel
A3936SED and