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 H
2
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’.
Data Sheet
29318.20B*
ABSOLUTE MAXIMUM RATINGS
at T
J
≤
+150°C
Supply Voltage, V
BB
. . . . . . . . . . . . . . .
45 V
Output Current, I
OUT
(continuous) . . . . . . . . . . . . . . . .
±
2.0 A
(peak) . . . . . . . . . . . . . . . . . . . . .
±
3.0 A
Input Voltage Range, V
IN
. . .
-0.3 V to 15 V
Threshold Voltage, V
THS
. . . . . . . . . . . .
15 V
Package Power Dissipation,
P
D
. . . . . . . . . . . . . . . . . . .
See Graph
Operating Temperature Range,
T
A
. . . . . . . . . . . . . . . .
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
. . . . . . . . . . . . . . . .
-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.
T
C
U
D D
O E
R 6S
P 3
D 39
E
U A
IN by
T d
N e
O c
C la
IS ep
D R
FEATURES
s
s
s
s
s
s
s
s
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.
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
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C, T
J
≤
+150
°
C, V
BB
= 45 V
Characteristic
Supply Voltage Range
Supply Current
Thermal Shutdown Temp.
Thermal Shutdown Hysteresis
Output Drivers
Output Leakage Current
Output Saturation Voltage
I
CEX
V
CE(SAT)
V
OUT
= V
BB
V
OUT
= 0 V
I
OUT
= -1 A
I
OUT
= +1 A
I
OUT
= -2 A
I
OUT
= +2 A
Output Sustaining Voltage
Clamp Diode Forward Voltage
Clamp Diode Leakage Current
Output Switching Time
Turn-ON Delay
(Resistive Load)
Symbol
V
BB
I
BB
T
J
∆T
J
Test Conditions
Operating
Outputs Open
V
BRAKE
= 0.8 V
Limits
Min. Typ. Max.
10
—
—
—
—
—
32
42
165
25
45
40
50
—
—
Units
V
mA
mA
°C
°C
µA
µA
V
V
V
V
V
V
µA
µs
µs
µs
µs
µs
µs
—
—
—
—
—
—
45
—
—
—
—
—
—
—
—
—
—
1.7
1.1
1.9
1.4
—
1.8
—
2.0
2.0
1.25
1.9
1.7
0.9
50
-50
1.9
1.3
2.1
1.6
—
2.0
50
—
—
—
—
—
—
V
CE(sus)
V
F
I
R
t
r
t
f
t
on
t
off
I
OUT
=
±2
A, L = 2 mH
I
F
= 2 A
V
R
= 45 V
I
OUT
=
±2
A, Resistive Load
I
OUT
=
±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
Turn-OFF Delay
(Resistive Load)
Continued next page...
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
DSP and ARM Processors
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