DataSheetWiki


3974 fiches techniques PDF

Allegro MicroSystems - DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER

Numéro de référence 3974
Description DMOS DUAL FULL-BRIDGE PWM MOTOR DRIVER
Fabricant Allegro MicroSystems 
Logo Allegro MicroSystems 





1 Page

No Preview Available !





3974 fiche technique
3974
NC 7
STROBE 8
CLOCK 9
DATA 10
GND 11
GND 12
GND 13
REF1 14
÷
REF2 15
LOGIC
SUPPLY 16 VDD
NC 17
÷
VBB1
PROGRAM
PWM TIMER
LOGIC
PROGRAM
PWM TIMER
LOGIC
VBB2
39 NC
38 CP2
37 CP1
36 CP
35 GND
34 GND
33 GND
32 OSC
31 SLEEP
30 VREG
29 NC
Dwg. PP-073
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Load Supply Voltage, VBB ............................ 50 V
Output Current, IOUT .................................. ±1.5 A
Logic Supply Voltage, VDD .......................... 7.0 V
Logic Input Voltage Range, VIN
Continous ................... -0.3 V to VDD + 0.3 V
tW < 30 ns ................... -1.0 V to VDD + 1.0 V
Reference Voltage, VREF ................................. 3 V
Sense Voltage (dc), VS
Continous .............................................. 0.5 V
tW < 1 µs ................................................ 2.5 V
Package Power Dissipation, PD .................. 3.9 W
Operating Temperature Range,
TA ......................................... -20°C to +85°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.
DMOS DUAL FULL-BRIDGE
PWM MOTOR DRIVER
Designed for pulse-width modulated (PWM) current control
of two dc motors, the A3974SED is capable of output currents to
±1.5 A and operating voltages to 50 V. Internal fixed off-time
PWM current-control timing circuitry can be programmed via a
serial interface to operate in slow, fast, and mixed current-decay
modes.
Independant ENABLE input terminals are provided for use in
controlling the speed and torque of each dc motor with externally
applied PWM control signals.
Synchronous rectification circuitry allows the load current to
flow through the low rDS(on) of the DMOS output driver during
the current decay. This feature will eliminate the need for
external clamp diodes in most applications, saving cost and
external component count, while minimizing power dissipation.
Internal circuit protection includes thermal shutdown with
hysteresis, undervoltage monitoring of VDD and the charge
pump, and crossover-current protection. Special power-up
sequencing is not required.
The A3974SED is supplied in a 44-lead plastic PLCC with
four copper batwing tabs for maximum heat dissipation. The
power tabs are at ground potential and need no electrical isola-
tion.
FEATURES
s ±1.5 A, 50 V Continuous Output Rating
s Low rDS(on) DMOS Output Drivers
s Programmable Slow, Fast, and Mixed Current-Decay Modes
s Serial-Interface Controls Chip Functions
s Synchronous Rectification for Low Power Dissipation
s Internal UVLO and Thermal Shutdown Circuitry
s Crossover-Current Protection
s Sleep and Idle Modes
Always order by complete part number: A3974SED .

PagesPages 12
Télécharger [ 3974 ]


Fiche technique recommandé

No Description détaillée Fabricant
3970 3970-Type 1550 nm Transmitter Agere Systems
Agere Systems
3971 DUAL DMOS FULL-BRIDGE DRIVER Allegro MicroSystems
Allegro MicroSystems
3972 DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER Allegro MicroSystems
Allegro MicroSystems
3973 DUAL DMOS FULL-BRIDGE MICROSTEPPING PWM MOTOR DRIVER Allegro MicroSystems
Allegro MicroSystems

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche