Motor Driver. A3976 Datasheet


A3976 Driver. Datasheet pdf. Equivalent


Part Number

A3976

Description

Dual Full Bridge Protected Motor Driver

Manufacture

Allegro

Total Page 7 Pages
Datasheet
Download A3976 Datasheet


A3976
A3976
Dual Full Bridge Protected Motor Driver
Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available.
Date of status change: May 1, 2006
Recommended Substitutions:
For new customers or new applications, refer to the 3980.
NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a
product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information
included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor
for any infringements of patents or other rights of third parties which may result from its use.

A3976
Page 1 of 6
3976
PRELIMINARY DATASHEET - 8/24/04
(Subject to change without notice)
DUAL FULL BRIDGE
PROTECTED MOTOR DRIVER
V BB 1
ENABLE1 2
PHASE1 3
NC 4
NC 5
GROUND 6
GROUND 7
n/c 8
OUT1A 9
n/c 1 0
FAULT1 1 1
OUT1B 1 2
A3976KLB
2 4 V CC
2 3 ENABLE2
2 2 PHASE2
21 NC
20 NC
19 GROUND
18 GROUND
1 7 n/c
1 6 OUT2A
1 5 n/c
1 4 FAULT2
1 3 OUT2B
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Operating Supply Voltage, VBB .................... 27 V
Non-Operating Supply Voltage .................... 35 V
Output Current, IOUT ............................±500 mA*
Logic Supply Voltage, VCC.......................... 7.0 V
Fault Output Voltage ................................... 7.0 V
Logic Input Voltage Range,
VIN ......................... -0.3 V to VCC + 0.3 V
Package Power Dissipation (TA = +25°C), PD
A3976KLB.................................. 2.2 W
Operating Temperature Range,
TA .............................. -40°C to +125°C
Junction Temperature, TJ ......................... +150°C
Storage Temperature Range,
TS .............................. -55°C to +150°C
* 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.
The A3976 is designed to drive both windings of a bipolar stepper
motor or bidirectionally control two DC Motors. Both H-Bridges are capable
of continuous output currents of up to +/- 500 mA and operating voltages to
27V. Free wheeling, substrate isolated diodes are included for output transient
suppression when switching motors or other inductive loads. For each bridge
the PHASE input controls load current polarity by selecting the appropriate
source and sink driver pair. The ENABLE input, when held high, enables the
respective output H-bridge. When both ENABLE pins are held low the device
will enter SLEEP mode and consume less than 100µA.
The A3976 is protected to ensure safe operation in harsh operating
environments and was designed specifically for automotive applications.
Protection circuitry will check for open or shorted load, motor lead short to
ground or supply, VBB overvoltage, VCC undervoltage, and thermal
shutdown. If any of these conditions are detected the outputs will be disabled
and fault information will be output to diagnostic pins FAULT1 and FAULT2.
The A3976 is supplied in a 24-lead plastic SOIC with a copper
batwing tab (suffix ‘LB’).
FEATURES
T ±500 mA Continuous Output Rating
T 35V Load Dump Survival
T Output Short Circuit Protection
T Coded Fault Diagnostic Outputs
T Low Current Standby Mode
T Open Load Monitor
T Low Current Standby Mode
T VBB Over Voltage Shutdown
T Internal Thermal Shutdown Circuitry
T Internal Low Parasitic Free Wheeling Diodes
T Crossover Current Protection


Features A3976 Dual Full Bridge Protected Motor D river Discontinued Product These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer ava ilable. Date of status change: May 1, 2 006 Recommended Substitutions: For new customers or new applications, refer to the 3980. NOTE: For detailed informati on on purchasing options, contact your local Allegro field applications engine er or sales representative. Allegro Mic roSystems, Inc. reserves the right to m ake, from time to time, revisions to th e anticipated product life cycle plan f or a product to accommodate changes in production capabilities, alternative pr oduct availabilities, or market demand. The information included herein is bel ieved to be accurate and reliable. Howe ver, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may resul t from its use. Page 1 of 6 3976 PRELIMINARY DATASHEET - 8/2.
Keywords A3976, datasheet, pdf, Allegro, Dual, Full, Bridge, Protected, Motor, Driver, 3976, 976, 76, A397, A39, A3, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)