A3936SEDTRT Allegro Micro Systems, Inc., A3936SEDTRT Datasheet
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A3936SEDTRT
Manufacturer Part Number
A3936SEDTRT
Description
PLCC44
Manufacturer
Allegro Micro Systems, Inc.
Datasheet
1.A3936SEDT.pdf
(9 pages)
Specifications of A3936SEDTRT
Date_code
09+
Load Supply Voltage, V
Output Current, I
Logic Supply Voltage, V
Logic Input Voltage Range, V
Sense Voltage, V
Reference Voltage, V
Package Power Dissipation,
Operating Temperature Range,
Junction Temperature, T
Storage Temperature Range,
* 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
ABSOLUTE MAXIMUM RATINGS
(t
(t
P
T
T
D
W
W
A
S
............................... -55°C to +150°C
>30 ns) .......... -0.3 V to V
<30 ns) ................ -1.0V to V
............................................... 3.9 W
................................ -20°C to +85°C
OUT
SENSE
at T A = +25°C
................................... ±3 A*
REF
................................. 0.5 V
BB
J
DD
................................ V
......................... +150°C
........................... 50 V
......................... 7.0 V
IN
DD
+ 0.3 V
DD
+1V
DD
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.
Features
Selection Guide
Part Number
A3936SED-T
A3936SEDTR-T
*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.
improve power dissipation during PWM operation.
hysteresis, and crossover current protection. Special power up sequencing is
not required.
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.
3936
±3 A, 50 V Continuous Output Rating
Low
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
Designed for pulse-width modulated (PWM) current control of three-
r
DS(on)
Internal synchronous rectification control circuitry is provided to
Internal circuit protection includes thermal shutdown with
The A3936 is supplied in a 44-pin plastic PLCC with internally
Outputs (typically 500 m
Pb-free
Yes
Yes
PWM MOTOR DRIVER
DMOS THREE-PHASE
*
Packing
27 per tube
450 per reel
Ω
source, 315 m
A3936SED and
Ω
sink)