Allegro UDN2936W-120, UDQ2936W-120 Datasheet
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 shutdown 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 H
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.
input. Current control is accomplished by sensing
2
Data Sheet
29318.20B
ABSOLUTE MAXIMUM RATINGS
at TJ ≤ +150°C
Supply Voltage, VBB . . . . . . . . . . . . . . . 45 V
Output Current, I
(continuous) . . . . . . . . . . . . . . . . ±2.0 A
(peak). . . . . . . . . . . . . . . . . . . . .
Input Voltage Range, VIN . . . -0.3 V to 15 V
Threshold Voltage, V
Package Power Dissipation,
. . . . . . . . . . . . . . . . . . . See Graph
P
D
Operating Temperature Range,
. . . . . . . . . . . . . . . . -20°C to +85°C
T
A
Storage Temperature Range,
. . . . . . . . . . . . . . . . -55°C to +150°C
T
S
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.
OUT
. . . . . . . . . . . . 15 V
THS
±3.0 A
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.
FEATURES
■ 10 V to 45 V Operation
■ ±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
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
W
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1985, 2000 Allegro MicroSystems, Inc.
10
R = 2.0°C/W
θJT
2936-120
3-PHASE BRUSHLESS
DC MOTOR
CONTROLLER/DRIVER
8
6
12°C/W HEAT SINK
4
2
FREE AIR, R = 38°C/W
0
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
25
50 75 100 125 150
TEMPERATURE IN °C
3.0°C/W HEAT SINK
R = 14°C/W
θJA
θJA
R = 5.0°C/W
θJA
Typical Application
R =
S
0.15 Ω
DIR.
BRAKE
BB
V
Dwg. GP-012B
Commutation Truth Table
UDN2936W-120
Hall Sensor Inputs Outputs
H
H
1
High Low High Low High Z Low High
High Low Low Low High High Low Z
High High Low Low High High Z Low
Low High Low Low High Z High Low
Low High High Low High Low High Z
Low Low High Low High Low Z High
High Low High High High Z High Low
High Low Low High High Low High Z
High High Low High High Low Z High
Low High Low High High Z Low High
Low High High High High High Low Z
Low Low High High High High Z Low
X X X X Low Low Low Low
H3 DIRECTION BRAKE OUTAOUTB OUT
2
C
www.allegromicro.com
V
CC
Dwg. EP-033
X= Irrelevant
Z = High Impedance
Note that the UDN2936W-120 truth table is the same as the original
UDN2936W except that the H
Hall sensor inputs are inverted.
2
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