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2917 Schematic ( PDF Datasheet ) - Allegro MicroSystems

Teilenummer 2917
Beschreibung DUAL FULL-BRIDGE PWM MOTOR DRIVER
Hersteller Allegro MicroSystems
Logo Allegro MicroSystems Logo 




Gesamt 8 Seiten
2917 Datasheet, Funktion
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 .






2917 Datasheet, Funktion
2917
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
UDN2917EB
Dimensions in Inches
(controlling dimensions)
28
18
0.319
0.291
0.021
0.013
0.319
0.291
0.050
BSC
29
0.032
0.026
0.695
0.685
0.656
0.650
39
17
INDEX AREA
7
0.020
MIN
0.180
0.165
40 44 1 2
0.656
0.650
0.695
0.685
Dimensions in Millimeters
(for reference only)
28
6
Dwg. MA-005-44A in
18
8.10
7.39
0.533
0.331
8.10
7.39
1.27
BSC
29
0.812
0.661
17.65
17.40
16.662
16.510
39
17
INDEX AREA
7
0.51
MIN
4.57
4.20
40 44 1 2
16.662
16.510
17.65
17.40
6
Dwg. MA-005-44A mm
NOTES: 1. MO-047AC except for terminal shoulder height.
2. Webbed lead frame. Leads 7-17 and 29-39 are internally one piece.
3. Lead spacing tolerance is non-cumulative.
4. Exact body and lead configuration at vendor’s option within limits shown.
5. Supplied in standard sticks/tubes of 27 devices or add “TR” to part number for tape and reel.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000

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