2936-120_02 [ALLEGRO]
3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER; 3相直流无刷电机控制器/驱动器
| 型号： | 2936-120_02 |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER |
| 文件： | 总10页 (文件大小：147K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
2936-120
3-PHASE BRUSHLESS DC MOTOR
CONTROLLER/DRIVER
Combining logic and power, the UDN2936W-120 provides com-
mutation and drive for three-phase brushless dc motors. Each of the
three outputs are rated at 45 V and ±2 A (±3 A peak), and include
internal ground clamp and flyback diodes. The driver also features
internal commutation logic, PWM current control, and thermal shut-
down protection.
The UDN2936W-120 is compatible with single-ended digital or
linear Hall effect sensors. The commutating logic is programmed for
120° electrical separation. The UDN2936W-120 can replace the
original UDN2936W (60° electrical separation) by simply adding an
inverter at the H2 input. Current control is accomplished by sensing
current through an external sense resistor and pulse-width modulating
the source drivers. Voltage thresholds and hysteresis can be externally
set by the user. If desired, internal threshold and hysteresis defaults
(300 mV, 7.5 percent) can be used. The UDN2936W-120 also includes
braking and direction control. Internal protection circuitry prevents
crossover current when braking or changing direction.
The UDN2936W-120 is also available for operation between -40°C
and +85°C. To order, change the prefix from ‘UDN’ to ‘UDQ’.
For maximum power-handling capability, the UDN2936W-120 is
supplied in 12-pin single in-line power-tab package. An external heat
sink may be required for high-current applications. The tab is at
ground potential and needs no insulation.
ABSOLUTE MAXIMUM RATINGS
at TJ ≤ +150°C
Supply Voltage, VBB .. . . . . . . . . . . . . . 45 V
FEATURES
Output Current, IOUT
ꢀꢀꢀ10 V to 45 V Operation
(continuous) . . . . . . . . . . . . . . . . ±2.0 A
(peak). . . . . . . . . . . . . . . . . . . . . ±3.0 A
Input Voltage Range, VIN . . . -0.3 V to 15 V
Threshold Voltage, VTHS . . . . . . . . . . . . 15 V
ꢀꢀꢀ±3 A Peak Output Current
ꢀꢀꢀInternal Clamp Diodes
ꢀꢀꢀInternal PWM Current Control
ꢀꢀꢀ120° Commutation Decoding Logic
ꢀꢀꢀThermal Shutdown Protection
ꢀꢀꢀCompatible with Single-Ended or Differential Hall-Effect Sensors
ꢀꢀꢀBraking and Direction Control
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . . -55°C to +150°C
Note: 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 and a junction
temperature of +150°C.
Always order by complete part number, e.g., UDN2936W-120 .
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
Functional Block Diagram
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1985, 2002 Allegro MicroSystems, Inc.
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
10
R
= 2.0°C/W
θJT
8
6
4
2
0
3.0°C/W HEAT SINK
= 5.0°C/W
R
θJA
12°C/W HEAT SINK
= 14°C/W
R
θJA
FREE AIR, R
= 38°C/W
θJA
25
50
75
100
125
150
°
TEMPERATURE IN C
Dwg. GP-012B
Commutation Truth Table
Typical Application
UDN2936W-120
Hall Sensor Inputs
Outputs
H1
H2
H3
DIRECTION BRAKE
OUTA OUTB OUTC
High
High
High
Low
Low
Low
High
High
High
Low
Low
Low
X
Low
Low
High
High
High
Low
Low
Low
High
High
High
Low
X
High
Low
Low
Low
High
High
High
Low
Low
Low
High
High
X
Low
Low
Low
Low
Low
Low
High
High
High
High
High
High
X
High
High
High
High
High
High
High
High
High
High
High
High
Low
Z
Low
Low
Z
High
High
Z
High
High
Z
Low
Low
Z
High
Z
Low
Low
Z
High
Low
Z
High
High
Z
High
High
Z
Low
Low
Z
Low
Low
Z
High
High
Low
R
=
S
0.15 Ω
Low
Low
Low
X= Irrelevant
Z = High Impedance
V
CC
Note that the UDN2936W-120 truth table is the same as the original
UDN2936W except that the H2 Hall sensor inputs are inverted.
Dwg. EP-033
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VBB = 45 V
Limits
Min. Typ. Max.
Characteristic
Symbol
VBB
Test Conditions
Operating
Units
V
Supply Voltage Range
Supply Current
10
—
—
—
—
—
32
45
40
50
—
—
IBB
Outputs Open
VBRAKE = 0.8 V
mA
mA
°C
42
Thermal Shutdown Temp.
TJ
165
25
Thermal Shutdown Hysteresis
∆TJ
°C
Output Drivers
Output Leakage Current
ICEX
VOUT = VBB
—
—
—
—
—
—
45
—
—
—
—
—
—
—
—
—
—
50
-50
1.9
1.3
2.1
1.6
—
µA
µA
V
VOUT = 0 V
Output Saturation Voltage
VCE(SAT)
IOUT = -1 A
1.7
1.1
1.9
1.4
—
IOUT = +1 A
V
IOUT = -2 A
V
IOUT = +2 A
V
Output Sustaining Voltage
Clamp Diode Forward Voltage
Clamp Diode Leakage Current
Output Switching Time
VCE(sus)
IOUT = ±2 A, L = 2 mH
IF = 2 A
V
VF
IR
tr
1.8
—
2.0
50
—
V
VR = 45 V
µA
µs
µs
µs
µs
µs
µs
IOUT = ±2 A, Resistive Load
IOUT = ±2 A, Resistive Load
Source Drivers, 0 to -2 A
Sink Drivers, 0 to +2 A
Source Drivers, -2 A to 0
Sink Drivers, +2 A to 0
2.0
2.0
1.25
1.9
1.7
0.9
tf
—
Turn-ON Delay
ton
—
(Resistive Load)
—
Turn-OFF Delay
toff
—
(Resistive Load)
—
Continued next page...
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VBB = 45 V continued
Limits
Characteristic
Control Logic
Symbol
Test Conditions
Min. Typ. Max.
Units
Logic lnput Voltage
VIN(1)
VIN(0)
VIN
VDIR or VBRAKE
2.0
—
—
—
—
—
—
—
—
—
—
—
—
—
0.8
—
V
V
VDIR or VBRAKE
H1, H2, or H3
VDIR = 2 V
Sensor lnput Voltage Threshold
Input Current
2.5
V
IIN(1)
150 200
<1.0 5.0
-190 -220
µA
µA
µA
µA
µA
mA
µA
µA
µA
—
VBRAKE = 2 V
VH = 5 V
IIN(0)
VDIR = 0.8 V
VBRAKE = 0.8 V
VH = 0.8 V
35
50
-5.0 -20
-0.64 -1.0
-8.0 -15
ITHS
VTHS ≥ 3.0 V
VTHS < 3.0 V, VSENSE < VTHS/10.5
VTHS < 3.0 V, VSENSE > VTHS/9.5
VTHS/VSENSE at trip point, VTHS < 3.0 V
-15
-30
190 250 310
9.5 10 10.5
270 300 330
Current Limit Threshold
Default Sense Trip Voltage
Default Hysteresis
Deadtime
—
VSENSE
—
V
V
THS ≥ 3.0 V
THS ≥ 3.0 V
mV
%
—
—
7.5
2.0
—
—
td
BRAKE or DIRECTION
µs
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
APPLICATIONS INFORMATION
Thresholds and hysteresis can be set with external resistors,
or internal defaults can be used. With VTHS > 3.0 V, the trip
point is internally set at 300 mV with 7.5% hysteresis. Load
current is then determined by the equation:
The UDN2936W-120 power driver provides commutation
logic and power outputs to drive three-phase brushless dc
motors.
The UDN2936W-120 is designed to interface with single-
ended linear or digital Hall-effect devices (HEDs). Internal
pull-up resistors allow for direct use with open-collector digital
HEDs. The Hn inputs have 2.5 V thresholds.
I
TRIP = 0.3 /RS
With VTHS < 3.0 V, the threshold, hysteresis percentage,
and peak current are set with external resistors according to the
equations:
The commutation logic provides decoding for HEDs with
120° electrical separation. At any one step in the logic sequenc-
ing, one half-bridge driver is sourcing current, one driver is
sinking current, and one driver is in a high-impedance state (see
Truth Table).
threshold voltage (VTHS) = VREF x RT /(RH + RT)
hysteresis percentage = RH /50 VREF
load trip current (ITRIP) = VTHS /10 RS
A logic low on the BRAKE pin turns on the three sink
drivers and turns off the three source drivers, essentially
shorting the motor windings to ground. During braking, the
back-electromotive force generated by the motor produces a
current that dynamically brakes the motor. Depending upon the
rotational velocity of the motor, this current can approach the
locked rotor current level (which is limited only by the motor
winding resistance). During braking, the output current-
limiting circuitry is disabled and care should be taken to ensure
that the back-EMF generated brake current does not exceed the
maximum rating (3 A peak) of the sink drivers and ground
clamp diodes.
Percentage hysteresis is a fixed value independent of load
current. The chopping frequency is a function of circuit
parameters including load inductance, load resistance, supply
voltage, hysteresis, and switching speed of the drivers.
The UDN2936W-120 outputs are rated for normal operat-
ing currents of up to ±2 A and startup currents to ±3 A (see
cautions above regarding braking and changing of motor
direction). Internal power ground-clamp and flyback diodes
protect the outputs from the voltage transients that occur when
switching inductive loads. All devices also feature thermal
protection circuitry. If the junction temperature reaches
+165°C, the thermal shutdown circuitry turns off all output
drivers. The outputs are re-enabled when the junction cools
down to approximately +140°C. This protection is only
intended to protect the device from failures due to excessive
junction temperature or loss of heat sinking and should not
imply that output short circuits are permitted.
Changing the logic level of the DIRECTION pin inverts the
output states, thus reversing the direction of the motor. Chang-
ing the direction of a rotating motor produces a back-EMF
current similar to when braking the motor. The load current
should not be allowed to exceed the maximum rating (±3 A
peak) of the drivers.
As with all high-power integrated circuits, the printed
wiring board should utilize a heavy ground plane. For optimum
performance, the drivers should be soldered directly into the
board. The power supply should be decoupled with an electro-
lytic capacitor (>10 µF) as close as possible to the device
supply pin (VBB ).
An internally generated dead time (td) of approximately
2 µs prevents potentially destructive crossover currents that can
occur when changing direction or braking.
Motor current is internally controlled by pulse-width
modulating the source drivers with a preset hysteresis format.
Load current through an external sense resistor (RS) is con-
stantly monitored. When the current reaches the set trip point
(determined by an external reference voltage or internal
default), the source driver is disabled. Current recirculates
through the ground clamp diode, motor winding, and sink
driver. An internal constant-current sink reduces the trip point
(hysteresis). When the decaying current reaches this lower
threshold, the source driver is enabled again and the cycle
repeats.
Replacing the UDN2936W. The original UDN2936W can
be easily replaced with a UDN2936W-120 by inserting an
inverter (two resistors and a 2N3904 or 2N2222) between the
H2 Hall sensor and pin 8 of the UDN2936W-120, as shown in
the figure on the next page. If an extra inverter is available, be
certain that a pull-up for the Hall sensor is provided.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
V
DIRECTION
V
V
V
H1
H2
H3
+
OUT
OUT
0
–
A
B
+
0
–
t
d
+
OUT
0
–
C
Dwg. WM-002-1
Replacing the original UDN2936W
Typical Hall-Effect
Sensor Locations
UDN2936W-120
+6.8 V
+V +V
SENSOR H2
CUT
8
+
–
+2.5 V
X
2N2222
OR
2N3904
Dwg. EP-071
Dwg. No. W-193
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
Dimensions in Inches
(controlling dimensions)
1.260
1.240
0.180
MAX
0.055
0.045
0.775
0.765
0.245
0.225
0.020
0.155
ø
0.145
0.140
0.365
0.135
0.100
0.570
0.540
INDEX
AREA
0.290 MIN
1
12
0.065
0.035
0.030
0.020
0.023
0.018
0.100
0.080
0.070
±0.010
Dwg. MP-007 in
NOTES: 1. Lead thickness is measured at seating plane or below.
2. Lead spacing tolerance is non-cumulative
3. Exact body and lead configuration at vendor’s option
within limits shown.
4. Lead gauge plane is 0.030” below seating plane.
5. Supplied in standard sticks/tubes of 15 devices.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
Dimensions in Millimeters
(for reference only)
32.00
31.49
4.57
MAX
1.40
1.14
19.69
19.45
6.22
5.71
0.51
3.94
3.68
ø
3.56
9.27
3.43
2.54
14.48
13.71
INDEX
AREA
7.36 MIN
1
12
1.65
0.89
0.76
0.51
0.59
0.45
2.54
2.03
1.77
±0.254
Dwg. MP-007 mm
The products described here are manufactured
under one or more U.S. patents or U.S. patents
pending.
Allegro MicroSystems, Inc. reserves the right to
make, from time to time, such departures from the detail
specifications as may be required to permit improve-
ments in the performance, reliability, or
manufacturability of its products. Before placing an
order, the user is cautioned to verify that the informa-
tion being relied upon is current.
NOTES: 1. Lead thickness is measured at seating plane or below.
2. Lead spacing tolerance is non-cumulative
3. Exact body and lead configuration at vendor’s option
within limits shown.
Allegro products are not authorized for use as
critical components in life-support devices or systems
without express written approval.
4. Lead gauge plane is 0.762 mm below seating plane.
5. Supplied in standard sticks/tubes of 15 devices.
The information included herein is believed to be
accurate and reliable. However, Allegro
MicroSystems, Inc. assumes no responsibility for its
use; nor for any infringement of patents or other rights
of third parties which may result from its use.
www.allegromicro.com
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
MOTOR DRIVERS
Function
Output Ratings*
Part Number†
INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS
3-Phase Power MOSFET Controller
3-Phase Power MOSFET Controller
3-Phase Power MOSFET Controller
3-Phase Back-EMF Controller/Driver
3-Phase PWM Current-Controlled DMOS Driver
—
—
—
28 V
40 V
50 V
14 V
50 V
3933
3935
3932
8902–A
3936
±900 mA
±3 A
INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS
PWM Current-Controlled Dual Full Bridge
Dual Full Bridge with Protection & Diagnostics
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled Dual Full Bridge
Microstepping Translator/Dual Full Bridge
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled Dual DMOS Full Bridge
PWM Current-Controlled Full Bridge
PWM Current-Controlled Dual Full Bridge
PWM Current-Controlled DMOS Full Bridge
PWM Current-Controlled Microstepping Full Bridge
PWM Current-Controlled Microstepping Full Bridge
PWM Current-Controlled Dual DMOS Full Bridge
PWM Current-Controlled Dual DMOS Full Bridge
PWM Current-Controlled Full Bridge
±500 mA
±500 mA
±650 mA
±650 mA
±750 mA
±750 mA
±750 mA
±750 mA
±800 mA
±1.0 A
±1.3 A
±1.5 A
±1.5 A
±1.5 A
±1.5 A
±1.5 A
±1.5 A
±2.0 A
18 V
30 V
30 V
30 V
30 V
45 V
45 V
45 V
33 V
35 V
50 V
45 V
50 V
50 V
50 V
50 V
50 V
50 V
50 V
35 V
50 V
50 V
3965
3976
3966
3968
3967
2916
2919
6219
3964
3973
3953
2917
3948
3955
3957
3972
3974
3952
3958
3977
3971
3959
PWM Current-Controlled DMOS Full Bridge
Microstepping Translator/Dual DMOS Full Bridge
Dual DMOS Full Bridge
±2.0 A
±2.5 A
±2.5 A
±3.0 A
PWM Current-Controlled DMOS Full Bridge
UNIPOLAR STEPPER MOTOR & OTHER DRIVERS
Unipolar Stepper-Motor Quad Drivers
Unipolar Microstepper-Motor Quad Driver
Unipolar Stepper-Motor Translator/Driver
Unipolar Stepper-Motor Quad Driver
Unipolar Stepper-Motor Quad Driver
Unipolar Microstepper-Motor Quad Driver
1.0 A
1.2 A
1.25 A
1.8 A
3.0 A
3.0 A
46 V
46 V
50 V
50 V
46 V
46 V
7024 & 7029
7042
5804
2540
7026
7044
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or
over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output.
† Complete part number includes additional characters to indicate operating temperature range and package style.
Also, see 3175, 3177, 3235, and 3275 Hall-effect sensors for use with brushless dc motors.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
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