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2927 Folha de dados(PDF) 1 Page - Allegro MicroSystems

Nome de Peças 2927
Descrição Electrónicos  DUAL FULL-BRIDGE PWM MOTOR DRIVER
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Fabricante Electrônico  ALLEGRO [Allegro MicroSystems]
Página de início  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

2927 Folha de dados(HTML) 1 Page - Allegro MicroSystems

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2927
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
DISCONTINUED
PRODUCT
FOR
REFERENCE
ONL
Y
GND
GND
GND
GND
7
8
9
10
11
12
13
14
15
16
17
29
30
39
38
37
36
35
34
33
32
31
Dwg. PP-021
1
2
PWM 1
PWM 2
The A2927SEB motor driver is designed to drive both windings of a
bipolar stepper motor or bidirectionally control two dc motors. Both
bridges are capable of sustaining 50 V and include internal pulse-width
modulation (PWM) control of the output current to 1.5 A.
For PWM current control, the maximum output current is determined
by the user’s selection of a reference voltage and sensing resistor. Two
logic-level inputs select output current limits of 0, 33%, 67%, or 100%
of the maximum level. A PHASE input to each bridge determines load
current direction. Active-low ENABLE inputs control the four drivers in
each bridge.
Internally generated delays prevent cross-over currents when
switching current direction. Special power-up sequencing is not required.
Thermal protection circuitry disables the outputs if the chip temperature
exceeds safe operating limits.
The A2927SEB is supplied in a 44-lead power PLCC for surface-
mount applications. Its batwing construction provides for maximum
package power dissipation in the smallest possible construction.
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
Always order by complete part number: A2927SEB .
FEATURES
s 1.5 A Output Current
s 50 V Output Sustaining Voltage
s Internal Flyback Diodes
s Digital Control of Output Current
s Undervoltage Lockout
s Internal Thermal Shutdown Circuitry
2927
PRELIMINARY INFORMATION
(Subject to change without notice)
September 16, 1997
ABSOLUTE MAXIMUM RATINGS
at T
J +150°C
Motor Supply Voltage, VBB ................... 50 V
Output Current, IOUT .........................
±1.5 A
Logic Supply Voltage, VCC ................... 7.0 V
Logic Input Voltage Range,
VIN ............................... -0.3 V to +7.0 V
Output Emitter Voltage, VE .................. 1.0 V
Package Power Dissipation,
PD ........................................ See Graph
Operating Temperature Range,
TA ................................. -20
°C to +85°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 peak
current rating or a junction temperature of +150
°C.


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