OM9371
FULL-FEATURED POWER MODULE FOR DIRECT DRIVE
OF 3-PHASE BRUSHLESS DC MOTORS
25 Amp. Push-Pull 3-Phase Brushless
DC Motor Controller/Driver Module
in a Power Flatpack
FEATURES
• Fully integrated 3-Phase Brushless DC Motor Control Subsystem
includes power stage, non-isolated driver stage, and controller stage
• MOSFET Output Stage
• 25A Average Phase Current with 48V Maximum Bus Voltage
• Internal Precision Current Sense Resistor (6W max. dissipation)
• Speed and Direction Control of Motor
• Brake Input for Dynamic Braking of Motor
• Overvoltage/Coast Input for Shutdown of All Power Switches
• Soft Start for Safe Motor Starting
• Unique Hermetic or Plastic Ring Frame Power Flatpacks
•
Hermetic (3.10" x 2.10" x 0.385")
•
Plastic Ring Frame (4.13" x 2.00" x 0.49")
APPLICATIONS
• Fans and Pumps
• Hoists
• Actuator Systems
DESCRIPTION
The OM9371 is one of a series of versatile, integrated three-phase brushless DC motor
controller/driver subsystems housed in a 43 pin power flatpack. The OM9371 is best used as a two
quadrant speed controller for controlling/driving fans, pumps, and motors in applications which require
small size. Many integral control features provide the user much flexibility in adapting the OM9371 to
specific system requirements.
The small size of the complete subsystem is ideal for aerospace, military, and high-end industrial
applications. Two package types provide a broad range of cost and screening options to fit any
application.
8 10 R2
Supersedes 6 11 R1
205 Crawford Street, Leominster, MA 01453 USA (978) 534-5776 FAX (978) 537-4246
Visit Our Web Site at www.omnirel.com
OM9371
SIMPLIFIED BLOCK DIAGRAM
COMMUTATION TRUTH TABLE
This table shows the Phase Output state versus
the state of the Hall-Effect and Direction Inputs.
Please note that the OM9371 Hall-Effect Inputs
are Grey-encoded; that is, only one input is
allowed to change from one input state to
another at a time.
The commutation coding shown reflects Hall-
Effect sensors that are spaced at 120°
mechanical increments.
Also, internal
protection logic disables all three Phase
Outputs when the Hall-Effect Inputs are set to
an illegal condition (i.e. all logic low or all logic
high).
DIGITAL INPUTS
Dir
1
1
1
1
1
1
0
0
0
0
0
0
X
X
H1
0
0
0
1
1
1
1
1
1
0
0
0
0
1
H2
0
1
1
1
0
0
0
0
1
1
1
0
0
1
H3
1
1
0
0
0
1
1
0
0
0
1
1
0
1
PHASE OUTPUTS
A
Hi-Z
Sink
Sink
Hi-Z
Source
Source
Sink
Sink
Hi-Z
Source
Source
Hi-Z
Hi-Z
Hi-Z
B
Sink
Hi-Z
Source
Source
Hi-Z
Sink
Source
Hi-Z
Sink
Sink
Hi-Z
Source
Hi-Z
Hi-Z
C
Source
Source
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
Source
Source
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
2.1 - 2
OM9371
ABSOLUTE MAXIMUM RATINGS
Motor Supply Voltage, V
m
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Vdc
Peak Motor Supply Voltage V
m pK
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Vdc
Average Phase Output Current, I
o
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Amperes DC*
Peak Phase Output Current, I
om
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Amperes Peak**
Control Supply Voltage, V
cc
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
+
18 V
Logic Input Voltage
(Note 1
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to +8 V
Reference Source Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 mAdc
Error Amplifier Input Voltage Range, (EA1+/EA1-) . . . . . . . . . . . . . . . . . . . . -0.3 Vdc to 10 Vdc
Error Amplifier Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±8 mAdc
Spare Amplifier Input Voltage (EA2+/EA2-). . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 Vdc to 10 Vdc
Spare Amplifier Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±8 mAdc
Current Sense Amplifier Input Voltage (ISH/ISL) . . . . . . . . . . . . . . . . . . . . . . . -0.3 V to +6 Vdc
Current Sense Amplifier Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mAdc
Tachometer Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mAdc
PWM Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.3 Vdc to +6 Vdc
Operating Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55°C to +150° C
Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65° C to +150° C
Power Switch Junction-to-Case Thermal Resistance, Rθ
jc
. . . . . . . . . . . . . . . . . . . . . . 0.55°C/W
Package Isolation Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 600 Vrms
Lead Soldering Temperature . . . . . . . . . . . . . 300°C, 10 seconds maximum, 0.125” from case
* Tcase = 25° C
** Tcase = 25° C, Maximum pulse width = 10mSec
RECOMMENDED OPERATING CONDITIONS
(Tcase = 25° C)
Motor Power Supply Voltage, V
m
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . + 2 8 Vdc
Average Phase Output Current, I
O
With Internal Current Sense Resistor
(Note 2)
Each Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 A
Control Supply Voltage, V
cc
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Vdc ±10%
Logic Low Input Voltage, V
il
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 Vdc (max)
Logic High Input Voltage, V
ih
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 Vdc (min)
Note 1: Logic Inputs: Direction, Hall Inputs (H1...H3) Overvoltage - Coast, Speed, and Quad Select.
Note 2: The internal 5mΩ current sense resistor is limited to 6 Wdc power dissipation. Other values are available.
Please contact the factory for more information.
2.1 - 3
ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Power Output Section
Zero Gate Voltage Drain Current Idss
Drain-to-Source On-Resistance Rds(on)
Gate Body Leakage Current
Diode Forward Voltage
Diode Reverse Recovery Time
Control Section
Control Supply Current
Control Turn-On Threshold
Driver Turn-On Threshold
Reference Section
Output Voltage
Output Voltage
Output Current
Load Regulation
Short Circuit Current
Vref
Vref
Io
Isc
4.9
4.7
---
-40
50
5.0
5.0
---
-5
100
5.1
5.3
30
150
V
V
mA
mV
mA
Icc
Vcc(+)
Vcc(+)
Vcc over operating range
Tc over operating range
Tc over operating range
100
9.45
13.0
mA
V
V
Igssr
Vf
trr
CONDITIONS (NOTE 1)
Vds = 60Vdc
Vgs = 0V
Id =37.5 A
Vgs = 10V (Note 4)
Vgs = 20 Vdc, Vds = 0V
Is = 37.5 A
Is = 75A, di/dt = -100A/usec,
Vgs = 0V
MIN.
TYP.
MAX.
250
0.016
100
0.9
56
UNITS
uA
Ohms
nA
V
nSec
OM9371
Tc over operating range
Iload = 0mA to -20mA
Tc over operating range
Error Amplifier / Spare Amplifier Sections
EA1 / EA2 Input Offset Current
EA1 / EA2 Input Bias Current
Input Offset Voltage
Amplifier Output Voltage Range
PWM Comparator Section
PWM Input Current
Current-Sense Amplifier Section
ISH / ISL Input Current
Input Offset Current
Peak Current Threshold Voltage
Over Current Threshold Voltage
ISH / ISL Input Voltage Range
Amplifier Voltage Gain
Amplifier Level Shift
Logic Input Section
H1, H2, H3 Low Voltage Threshold
H1, H2, H3 High Voltage Threshold
H1, H2, H3 Input Current
Quad Select / Direction
Threshold Voltage
Quad Select Voltage Hysteresis
Direction Voltage Hysteresis
Quad Select Input Current
Direction Input Current
Overvoltage / Coast Input Section
Overvoltage / Coast Inhibit
Threshold Voltage
Vth
Overvoltage / Coast Restart
Threshold Voltage
Vth
Overvoltage / Coast Hysteresis Voltage Vh
Overvoltage / Coast Input Current
Iin
Vil
Vih
Iin
Tc over operating range
Tc over operating range
Tc over operating range,
V(pin 20, 21 or 22) = 0Vdc
Tc over operating range
0.8
1.6
-400
1.0
1.9
-250
1.2
2.0
-120
V
V
uA
Iin
Ios
Vpk
Voc
--
Av
--
V(pin 12) = V(pin 13) = 0V
V(pin 12) = V(pin 13) = 0V
V(pin 12) = 0V, V(pin 13)
Varied to Threshold
V(pin 12) = 0V, V(pin 13)
Varied to Threshold
(Note 2)
V(pin 12) = 0.3V, V(pin 13)
= 0.5V to 0.7V
V(pin 12) = V(pin13) = 0.3V
-850
0.14
0.26
-1
1.75
2.4
-320
+/-2
0.20
0.30
0
+/-12
0.26
0.36
2
2.15
2.65
uA
uA
V
V
V
V/V
V
Iin
V(pin 9) = 2.5V
0
3.0
30
uA
Ios
Iin
Vos
--
V(pin 2) = V(pin 4) = 0V
V(pin 3) = V(pin 6) = 0V
V(pin 2) = V(pin 4) = 0V
V(pin 3) = V(pin 6) = 0V
0V < Vcommon-mode < 3V
-30
-50
-3
-45
0
0
7
6
nA
nA
mV
V
0
1.95
2.5
Vth
Vh
Vh
Iin
Iin
0.8
-30
-30
1.4
70
0.6
50
-1
2.0
150
30
V
mV
V
uA
uA
Tc over operating range
Tc over operating range
1.65
1.55
0.05
-10
1.75
1.65
0.10
-1
1.85
1.75
0.15
0
V
V
V
uA
2.1 - 4
OM9371
Parameter
Symbol
Ip
Id
Vth
Conditions (Note 1)
V(pin) 18) = 0V
V(pin 18) = 2.5V
MIN.
-16
0.1
0.1
TYP.
-10
0.4
0.2
MAX.
-5
3.0
0.3
Units
uA
mA
V
Soft-Start Section
Soft-Start Pull-Up Current
Soft-Start Discharge Current
Soft-Start Reset Threshold Voltage
Tachometer/Brake Section
Tachometer Output High Level
Tachometer Output Low Level
Tachometer On-Time
Tachometer On-Time Variation
Brake/Tach Timing Input Current
Brake/Tach Timing
Threshold Voltage
Brake/Tach Timing
Voltage Hysteresis
Speed Input Threshold Voltage
Speed Input Current
Oscillator Section
Oscillator Frequency
Voh
Vol
ton
--
Iin
Vth
Vh
Vth
Iin
Tc o
ver operating range
4.7
5.0
5.3
V
(Pin 15) 10kΩ to 2.5 V
Tc o
ver operating range
(Pin 15) 10kΩ to 2.5 V
85
Tc o
ver operating range
V (pin 16) = 0V
Tc o
ver operating range
-4.0
0.8
100
0.1
-1.9
1.0
0.09
257
-5
0.2
140
V
us
%
mA
V
V
mV
uA
1.2
Tc o
ver operating range
220
-30
290
30
fo
Measured at pin 10
13.5
14.8
20.0
kHz
SPECIFICATION NOTES:
1. All parameters specified for Ta = 25°C, Vcc = 15Vdc, Rosc = 75K
Ω
(to Vref), Cosc = 1800 pF, and all Phase Outputs unloaded (Ta ~ Tj). All negative currents shown
are sourced by (flow from) the pin under test.
2. Either ISH or ISL may be driven over the range shown.
3. Bold parameters tested at -55°C, 25°C, 125°C for SFB.
4. Pulse Test: Pulse Width < 300
µSec,
Duty Cycle < 2%.
PINOUT
PIN#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
NAME
VCC
EA1 “-” Input
EA2 “+” Input
EA1 “+” Input
+5V Reference Output
EA2 “-” Input
EA2 Output
EA1 Output
PWM Input
Oscillator Timing Input
Isense
ISH
ISL
Quad Select Input
Tachometer Output
Brake/Tach Timing Input
Overvoltage/Coast Input
Soft-Start Input
Ground
H3 Input
H2 Input
H1 Input
PIN#
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
(Case)
NAME
Speed Input
Direction Input
CSH
CSL
Motor Return
Motor Return
Source C
(No Connection)
Phase C Output
Phase C Output
Vmotor
Source B
Source B
Phase B Output
Phase B Output
Vmotor
Source A
Source A
Phase A Output
Phase A Output
Vmotor
(No Connection)
2.1 - 5
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