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Allegro MicroSystems - DUAL FULL-BRIDGE PWM MOTOR DRIVER

Numéro de référence 2917
Description DUAL FULL-BRIDGE PWM MOTOR DRIVER
Fabricant Allegro MicroSystems 
Logo Allegro MicroSystems 





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2917 fiche technique
2 917
GND 7
8
9
10
11
12
13
14
15
16
GND 17
1
2
PWM 1
PWM 2
39 GND
38
37
36
35
34
33
32
31
30
29 GND
Dwg. PP-021
Dwg. PP-021
ABSOLUTE MAXIMUM RATINGS
at TJ +150°C
Motor Supply Voltage, VBB .................... 45 V
Output Current, IOUT (tw 20 µs) ..... ±1.75 A
(Continuous) ............................... ±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.
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
The UDN2917EB 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 45 V and include internal pulse-width modula-
tion (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.
The bridges include both ground clamp and flyback diodes for protection
against inductive transients. 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 tempera-
ture exceeds safe operating limits.
The UDN2917EB 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. The UDN2917EB is available
for operation from -40°C to +85°C. To order, change the prefix from 'UDN' to
'UDQ'. This device is also available on special order for operation to +125°C.
FEATURES
I 1.5 A Continuous Output Current
I 45 V Output Sustaining Voltage
I Internal Clamp Diodes
I Digital Control of Output Current
I Internal Thermal Shutdown Circuitry
I Similar to Dual PBL3770
Always order by complete part number: UDN2917EB .

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