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UDN2917EBTR Datasheet

  • UDN2917EBTR

  • Industrial Control IC

  • 8頁

  • ETC

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2 91 7
LOGIC SUPPLY
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
modulation (PWM) control of the output current to 1.5 A.
39
PWM 1
38
37
1
36
35
34
33
GND
Data Sheet
29319.22A
SENSE
1
PHASE
1
V
REF 1
ENABLE
1
42
OUT
1A
OUT
1B
胃
1
43
41
RC
1
E
1
I
10
I
11
44
GND
7
8
9
10
11
12
13
14
15
16
EN
1
V
CC
40
6
5
4
3
2
1
V
BB
For PWM current control, the maximum output current is determined
by the user鈥檚 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 temperature 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 provided for operation over an ambient temperature
range of -20擄C to +85擄C.
2
32
31
30
29
GND
PWM 2
GND
17
胃
2
PHASE
2
26
ENABLE
2
27
EN
2
RC
2
28
E
2
19
LOAD SUPPLY
22
OUT
2B
21
OUT
2A
18
SENSE
2
20
V
REF 2
25
I
20
23
I
21
24
Dwg. PP-021
Dwg. PP-021
ABSOLUTE MAXIMUM RATINGS
at T
J
鈮?/div>
+150擄C
Motor Supply Voltage, V
BB
....................
45 V
Output Current, I
OUT
(t
w
鈮?/div>
20
碌s)
.....
鹵
1.75 A
(Continuous) ...............................
鹵
1.5 A
Logic Supply Voltage, V
CC
....................
7.0 V
Logic Input Voltage Range,
V
IN
................................
-0.3 V to +7.0 V
Output Emitter Voltage, V
E
...................
1.0 V
Package Power Dissipation,
P
D
.........................................
See Graph
Operating Temperature Range,
T
A
..................................
-20
擄
C to +85
擄
C
Storage Temperature Range,
T
S
................................
-55
擄
C to +150
擄
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擄C.
FEATURES
s
1.5 A Continuous Output Current
s
45 V Output Sustaining Voltage
s
Internal Clamp Diodes
s
Digital Control of Output Current
s
Internal Thermal Shutdown Circuitry
s
Similar to Dual PBL3770
Always order by complete part number:
UDN2917EB
.

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