ALLEGRO UDQ2916LB-T

Data Sheet
29319.20F
2916
DUAL FULL-BRIDGE
PWM MOTOR DRIVER
UDN2916B (DIP)
OUT 1A
1
OUT 2A
2
VBB
1
24
LOAD
S UP P LY
23
E1
22
S E NS E 1
21
OUT 1B
E2
3
S E NS E 2
4
OUT 2B
5
20
I 01
G R OUND
6
19
G R OUND
G R OUND
7
18
G R OUND
I 02
8
17
I 11
I 12
99
16
P HAS E 1
P HAS E 2
10
15
V REF 1
V REF 2
11
14
RC 1
RC 2
12
13
LOG IC
S UP P LY
θ2
P WM 1
P WM 2
2
θ1
V CC
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.
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 optimized 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 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.
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 construction provides for maximum package power dissipation in the smallest
possible construction. The UDN2916B/EB/LB are available for operation 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
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
39
7
PWM 1
8
37
1
10
36
11
35
12
34
13
33
2
14
32
15
31
16
30
PWM 2
17
29
26
27
28
PHASE 2
V REF 2
RC 2
I12 25
I02 24
OUT 2B 23
21
SENSE 2
E2 20
OUT 2A 18
GND
θ2
NC
NO CONNECTION 22
NC
NO CONNECTION 19
GND
38
VBB
9
GND
VCC
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
41
θ1
GND
LOGIC SUPPLY
VREF 1
RC1
42
40
I11
PHASE 1
43
I01
LOAD SUPPLY
2
1
OUT 1B
3
44
SENSE 1
4
1
OUT 1A
E
6
5
UDN2916EB (PLCC)
1
I 12
2
PHASE 2
3
V REF 2
θ2
24
LOAD SUPPLY
23
OUT 2B
SENSE 2
4
21
E2
RC 2
5
20
OUT 2A
GROUND
6
19
GROUND
LOGIC SUPPLY
8
RC 1
99
V REF 1
10
PHASE 1
11
I 11
12
θJA
= 30°C/W
SUFFIX 'B', R
θJA
= 40°C/W
3
2
1
SUFFIX 'LB', R θJA = 77°C/W
0
25
50
75
100
TEMPERATURE IN ° C
125
150
VBB
VBB
'B' PACKAGE,
CHANNEL 1
PIN NUMBERS
SHOWN.
24
OUT B
1
21
OUT A
2
7
SUFFIX 'EB', R
PWM CURRENT-CONTROL CIRCUITRY
22
GROUND
4
Dwg. PP-006A
PWM 2
02
RθJT = 6.0°C/W
Dwg. GP-035B
UDN2916LB (SOIC)
I
5
V REF 15
23
20 kΩ
÷10
SENSE –
22
40 kΩ
18
V CC
OUT 1A
16
E1
15
SENSE 1
14
OUT 1B
13
I 01
I 0 20
ONE
SHOT
+
RC
10 kΩ
GROUND
17
E
14
SOURCE
DISABLE
RC
CC
RS
RT
I 1 17
CT
θ1
PWM 1
1
Dwg. EP-007B
Dwg. PP-047
2
TRUTH TABLE
PHASE
OUTA
OUTB
H
L
H
L
L
H
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1994, 2003 Allegro MicroSystems, Inc.
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ 150°C, VBB = 45 V, VCC = 4.75 V to 5.25 V,
VREF = 5.0 V (unless otherwise noted).
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
10
—
45
V
VOUT = VBB
—
< 1.0
50
µA
VOUT = 0
—
<–1.0
–50
µA
Output Drivers (OUTA or OUTB)
Motor Supply Range
VBB
Output Leakage Current
ICEX
Output Sustaining Voltage
VCE(sus)
IOUT = ±750 mA, L = 3.0 mH
45
—
—
V
Output Saturation Voltage
VCE(SAT)
Sink Driver, IOUT = +500 mA
—
0.4
0.6
V
Sink Driver, IOUT = +750 mA
—
1.0
1.2
V
Source Driver, IOUT = –500 mA
—
1.0
1.2
V
Source Driver, IOUT = –750 mA
—
1.3
1.5
V
Clamp Diode Leakage Current
IR
VR = 45 V
—
< 1.0
50
µA
Clamp Diode Forward Voltage
VF
IF = 750 mA
—
1.6
2.0
V
IBB(ON)
Both Bridges ON, No Load
—
20
25
mA
IBB(OFF)
Both Bridges OFF
—
5.0
10
mA
VIN(1)
All inputs
2.4
—
—
V
VIN(0)
All inputs
—
—
0.8
V
IIN(1)
VIN = 2.4 V
—
<1.0
20
µA
VIN = 0.8 V
—
– 3.0
–200
µA
Operating
1.5
—
7.5
V
I0 = I1 = 0.8 V
9.5
10
10.5
—
I0 = 2.4 V, I1 = 0.8 V
13.5
15
16.5
—
I0 = 0.8 V, I1 = 2.4 V
25.5
30
34.5
—
—
170
—
°C
Driver Supply Current
Control Logic
Input Voltage
Input Current
Reference Voltage Range
Current Limit Threshold
(at trip point)
Thermal Shutdown Temperature
Total Logic Supply Current
Fixed Off-Time
www.allegromicro.com
VREF
VREF / VSENSE
TJ
ICC(ON)
I0 = I1 = 0.8 V, No Load
—
40
50
mA
ICC(OFF)
I0 = I1 = 2.4 V, No Load
—
10
12
mA
RT = 56 kΩ, CT = 820 pF
—
46
—
µs
toff
3
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
APPLICATIONS INFORMATION
PWM CURRENT CONTROL
PWM OUTPUT CURRENT WAVE FORM
The UDN2916B/EB/LB dual bridges are designed to
drive both windings of a bipolar stepper motor. Output
current is sensed and controlled independently in each
bridge by an external sense resistor (RS), internal comparator, and monostable multivibrator.
V P HAS E
When the bridge is turned ON, current increases in
the motor winding and it is sensed by the external sense
resistor until the sense voltage (VSENSE) reaches the level
set at the comparator’s input:
I OUT
ITRIP = VREF/10 RS
+
0
–
The comparator then triggers the monostable which
turns OFF the source driver of the bridge. The actual
load current peak will be slightly higher than the trip point
(especially for low-inductance loads) because of the
internal logic and switching delays. This delay (td) is
typically 2 µs. After turn-off, the motor current decays,
circulating through the ground-clamp diode and sink
transistor. The source driver’s OFF time (and therefore
the magnitude of the current decrease) is determined by
the monostable’s external RC timing components, where
toff = RTCT within the range of 20 kΩ to 100 kΩ and
100 pF to 1000 pF.
The fixed-off time should be short enough to keep
the current chopping above the audible range (< 46 µs)
and long enough to properly regulate the current. Because only slow-decay current control is available, short
off times (< 10 µs) require additional efforts to ensure
proper current regulation. Factors that can negatively
affect the ability to properly regulate the current when
using short off times include: higher motor-supply voltage, light load, and longer than necessary blank time.
I T R IP
td
toff
Dwg. WM-003-1A
LOAD CURRENT PATHS
V
BB
When the source driver is re-enabled, the winding
current (the sense voltage) is again allowed to rise to the
comparator’s threshold. This cycle repeats itself, maintaining the average motor winding current at the desired
level.
Loads with high distributed capaci-tances may
result in high turn-ON current peaks. This peak (appearing across RS) will attempt to trip the comparator, resulting in erroneous current control or high-frequency
oscillations. An external RCCC time delay should be used
to further delay the action of the comparator. Depending
on load type, many applications will not require these
external components (SENSE connected to E).
4
RS
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
B R IDG E ON
S OUR C E OF F
ALL OF F
Dwg. E P -006-1
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
LOGIC CONTROL OF OUTPUT CURRENT
Two logic level inputs (l0 and I1) allow digital selection of the motor
winding current at 100%, 67%, 33%, or 0% of the maximum level 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
H
H
0
The logic control inputs can also be
used to select a reduced current level (and
reduced power dissipation) for ‘hold’ conditions and/or increased current (and available
torque) for start-up conditions.
GENERAL
These logic level inputs greatly enhance the implementation of
µP-controlled drive formats.
During half-step operations, the l0 and l1 allow the µP to control the
motor at a constant torque between all positions in an eight-step
TYPICAL APPLICATION
STEPPER
MOTOR
V
BB
VBB
1
24
RC
CC
FROM
µP
20
6
19
7
18
8
17
REF
56 kΩ
RT
θ2
PWM 2
10
θ1
FROM
µP
V
REF
14
VCC
820 pF
13
+5 V
CT
56 kΩ
RT
Dwg. EP-008B1
www.allegromicro.com
All four drivers in the bridge output can
be turned OFF between steps (l0 = l1 ž 2.4 V)
resulting in a fast current decay through the
internal output clamp and flyback diodes. The
fast current decay is desirable in half-step and
high-speed applications. The PHASE, l0 ,and I1
inputs float high.
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.
16
15
11
12
820 pF
CT
CC
21
5
99
V
22
2
4
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.
Varying the reference voltage (VREF)
provides continuous control of the peak load
current for micro-stepping applications.
RC
1
3
PWM 1
RS
+
RS
23
2
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 highs on both l0 and l1
turn OFF all drivers to allow rapid current
decay when switching phases. This helps to
ensure proper motor operation at high step
rates.
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.
5
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
UDN2916B
Dimensions in Inches
(controlling dimensions)
24
0.014
0.008
13
NOTE 1
0.430
MAX
0.280
0.240
0.300
BSC
1
0.070
0.045
6
7
0.100
1.280
1.230
12
0.005
BSC
MIN
0.210
MAX
0.015
0.150
0.115
MIN
0.022
0.014
Dwg. MA-001-25A in
Dimensions in Millimeters
(for reference only)
24
0.355
0.204
13
NOTE 1
10.92
MAX
7.11
6.10
7.62
BSC
1
1.77
1.15
6
7
2.54
32.51
31.24
12
0.13
BSC
MIN
5.33
MAX
0.39
3.81
2.93
MIN
0.558
0.356
Dwg. MA-001-25A mm
NOTES:1. Webbed lead frame. Leads 6, 7, 18, and 19 are internally one piece.
2. Lead thickness is measured at seating plane or below.
3. Lead spacing tolerance is non-cumulative.
4. Exact body and lead configuration at vendor’s option within limits shown.
6
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
UDN2916EB
18
28
29
17
0.032
0.026
0.319
0.291
0.695
0.685
0.021
0.013
Dimensions in Inches
(controlling dimensions)
0.656
0.650
INDEX AREA
0.319
0.291
0.050
BSC
39
7
40
0.020
44
1
2
6
0.656
0.650
MIN
0.695
0.685
0.180
0.165
Dwg. MA-005-44A in
18
28
29
17
0.812
0.661
8.10
7.39
17.65
17.40
0.533
0.331
Dimensions in Millimeters
(for reference only)
16.662
16.510
INDEX AREA
8.10
7.39
1.27
BSC
7
39
40
0.51
MIN
4.57
4.20
44
1
2
6
16.662
16.510
17.65
17.40
Dwg. MA-005-44A mm
OTES: 1. MO-047AC except for terminal shoulder height. Intended to meet new JEDEC Standard when that is approved.
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.
www.allegromicro.com
7
2916
DUAL FULL-BRIDGE
MOTOR DRIVER
UDN2916LB
24
13
0.0125
0.0091
0.419
0.394
0.2992
0.2914
Dimensions in Inches
(for reference only)
0.050
0.016
0.020
0.013
1
2
3
0.6141
0.5985
0.050
0° TO 8°
BSC
NOTE 1
NOTE 3
0.0926
0.1043
0.0040 MIN.
Dwg. MA-008-25A in
24
0.32
0.23
Dimensions in Millimeters
(controlling dimensions)
10.65
10.00
7.60
7.40
1.27
0.40
0.51
0.33
1
2
3
15.60
15.20
1.27
0° TO 8°
BSC
NOTE 1
NOTE 3
2.65
2.35
0.10 MIN.
Dwg. MA-008-25A mm
Allegro MicroSystems, Inc. reserves the right to make, from time to
time, such departures from the detail specifications as may be required
to permit improvements in the design of its products.
The information included herein is believed to be accurate and
reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of
third parties which may result from its use.
8
NOTES:1. Webbed lead frame. Leads indicated are internally
one piece.
2. Lead spacing tolerance is non-cumulative.
3. Exact body and lead configuration at vendor’s option
within limits shown.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000