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PDF UDQ2916 Data sheet ( Hoja de datos )
| Número de pieza | UDQ2916 | |
| Descripción | DUAL FULL-BRIDGE PWM MOTOR DRIVER | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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2916
UDN2916B (DIP)
OUT 1A
OUT 2A
E2
S E NS E 2
1
2
3
4
2
OUT 2B
GR OUND
5
6
GR OUND 7
I 02 8
I12 99
P HAS E 2 10 θ2
V R E F 2 11
R C 2 12
VBB
24
LOAD
S UP P LY
23 E 1
1
22 S E NS E 1
21 OUT 1B
20 I 01
19 G R OUND
18 G R OUND
17 I11
θ1 16 P HAS E 1
15 V R E F 1
14
V C C 13
RC 1
L O G IC
S UP P LY
Dwg. P P -005
ABSOLUTE MAXIMUM RATINGS
at TJ ≤ 150°C
Motor Supply Voltage, VBB .................... 45 V
Output Current, IOUT
(Peak) ........................................ +1.0 A
(Continuous) .......................... +750 mA
Logic Supply Voltage, VCC ................... 7.0 V
Logic Input Voltage Range,
VIN ......................... -0.3 V to VCC+0.3 V
Output Emitter Voltage, VE .................. 1.5 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 UDN2916B, UDN2916EB, and UDN2916LB motor drivers are
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 750 mA. The outputs have been opti-
mized for a low output saturation voltage drop (less than 1.8 V
total source plus sink at 500 mA).
For PWM current control, the maximum output current is deter-
mined 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.
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 UDN2916B is supplied in a 24-pin dual in-line plastic batwing
package with a copper lead-frame and heat sinkable tabs for improved
power dissipation capabilities. The UDN2916EB is supplied in a 44-lead
power PLCC for surface mount applications. The UDN2916LB is
supplied in a 24-lead surface-mountable SOIC. Their batwing construc-
tion provides for maximum package power dissipation in the smallest
possible construction. The UDN2916B/EB/LB are available for opera-
tion from -40°C to +85°C. To order, change the prefix from 'UDN' to
'UDQ'. These devices are also available on special order for operation
to +105°C. The LB package is available in a lead-free version (100%
matte tin leadframe).
FEATURES
■ 750 mA Continuous Output Current
■ 45 V Output Sustaining Voltage
■ Internal Clamp Diodes
■ Internal PWM Current Control
■ Low Output Saturation Voltage
■ Internal Thermal Shutdown Circuitry
■ Similar to Dual PBL3717, UC3770
Always order by complete part number:
Part Number Package
UDN2916B
24-Pin DIP
UDN2916EB 44-Lead PLCC
UDN2916LB 24-Lead SOIC
UDN2916LB-T 24-Lead SOIC, Lead-free
1 page  
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
LOGIC CONTROL OF OUTPUT CURRENT
Two logic
winding current
laetv1e0l i0n%pu, t6s7(%l0 ,a3n3d%I1,)
allow digital
or 0% of the
selection of the
maximum level
motor
per
the table. The 0% output current condition turns OFF all drivers in the
bridge and can be used as an OUTPUT ENABLE function.
CURRENT-CONTROL TRUTH TABLE
l0 I1 Output Current
L L VREF/10 RS = ITRIP
H L VREF/15 RS = 2/3 ITRIP
L H VREF/30 RS = 1/3 ITRIP
HH
0
These logic level inputs greatly enhance the implementation of
µP-controlled drive formats.
motorDautraincgohnasltfa-snttetporoqpueerabteiotnwse,etnhealll0
paonsditli1oanlsloiwn
the µP to control
an eight-step
the
TYPICAL APPLICATION
STEPPER
MOTOR
1
RS
RC
CC
2
3
4
5
6
2
7
FROM
µP
VREF
56 kΩ
RT
8
99
10 θ 2
11
12
820 pF
CT
VBB
1
24
23
RC
22
21
RS
CC
V
BB
+
20
19
18
17
θ1 16
15
14
VCC 13
FROM
µP
V
REF
+5 V
820 pF
CT
56 kΩ
RT
Dwg. EP-008B1
sequence. This is accomplished by digitally
selecting 100% drive current when only one
phase is ON and 67% drive current when two
phases are ON. Logic
turn OFF all drivers to
highs
allow
roanpibdocthurlr0eanntd
l1
decay when switching phases. This helps to
ensure proper motor operation at high step
rates.
The logic control inputs can also be
used to select a reduced current level (and
reduced power dissipation) for ‘hold’ condi-
tions and/or increased current (and available
torque) for start-up conditions.
GENERAL
The PHASE input to each bridge
determines the direction motor winding
current flows. An internally generated
deadtime (approximately 2 µs) prevents
crossover currents that can occur when
switching the PHASE input.
All four drivers in the bridge output can
rbeesutultrinnegdinOaFFfasbtectwurereenntsdteepcsay(l0th=rol1užg2h.4theV)
internal output clamp and flyback diodes. The
fast current decay is desirable in half-step and
high-speed
inputs float
applications.
high.
The
PHASE,
l0,and
I1
Varying the reference
provides continuous control
vooflttahgeep(eVaRkEFlo) ad
current for micro-stepping applications.
Thermal protection circuitry turns OFF
all drivers when the junction temperature
reaches +170°C. It is only intended to protect
the device from failures due to excessive
junction temperature and should not imply
that output short circuits are permitted. The
output drivers are re-enabled when the
junction temperature cools to +145°C.
The UDN2916B/EB/LB output drivers
are optimized for low output saturation
voltages—less than 1.8 V total (source plus
sink) at 500 mA. Under normal operating
conditions, when combined with the excellent
thermal properties of the batwing package
design, this allows continuous operation of
both bridges simultaneously at 500 mA.
www.allegromicro.com
5
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| PDF Descargar | [ Datasheet UDQ2916.PDF ] | |
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