SMC6M40-10-1B

更新时间:2024-12-03 13:10:14
品牌:SENSITRON
描述:Brushless DC Motor Controller, 60A, PDFM43, POWER, PLASTIC, FP-43

SMC6M40-10-1B 概述

Brushless DC Motor Controller, 60A, PDFM43, POWER, PLASTIC, FP-43 运动控制电子器件

SMC6M40-10-1B 规格参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Active零件包装代码:DFM
包装说明:,针数:43
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.67
Is Samacsys:N模拟集成电路 - 其他类型:BRUSHLESS DC MOTOR CONTROLLER
JESD-30 代码:R-PDFM-T43功能数量:1
端子数量:43最大输出电流:60 A
封装主体材料:PLASTIC/EPOXY封装形状:RECTANGULAR
封装形式:FLANGE MOUNT峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified最大供电电压 (Vsup):16.5 V
最小供电电压 (Vsup):13.5 V标称供电电压 (Vsup):15 V
表面贴装:NO端子形式:THROUGH-HOLE
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
Base Number Matches:1

SMC6M40-10-1B 数据手册

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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Brushless DC Motor Driver Module in a Power Flatpack  
100-250V, 40 Amp  
FEATURES:  
• Fully integrated 3-Phase Brushless DC Motor Control Subsystem includes power stage, non-isolated  
driver stage, and controller stage  
• MOSFET Output Stage  
• 40A Average Phase Current with 10V to150V Maximum Bus Voltage  
• Internal Precision Current Sense Resistor (10W max. dissipation)  
• Cycle by cycle current limiting.  
• Fixed frequency PWM from zero speed to full speed.  
• Closed-loop Speed Control of Motor  
• Direction Input for direction reversal of Motor  
• Tacho output with average output proportional to speed  
• Brake Input for Dynamic Braking of Motor  
• Overvoltage/Coast Input for Shutdown of All Power Switches  
• Enable/Disable input with Soft Start for Safe Motor Starting  
• Hermetic or non-hermetic device (3.10" x 2.10" x 0.385")  
• Hermetic Device Part # (SMC6M40-XX)  
• Non-Hermetic Device Part # (SMC6M40-XX-1)  
APPLICATIONS:  
• Fans and Pumps  
• Hoists  
• Actuator Systems  
DESCRIPTION:  
The SMC6M40-XX is an, integrated three-phase brushless DC motor controller/driver subsystems housed  
in a 43 pin power flatpack. The SMC6M40-XX 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 SMC6M40-XX to specific system requirements.  
The small size of the complete subsystem is ideal for aerospace, military, high-end industrial, and medical  
applications.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
World Wide Web - www.sensitron.com E-mail Address - sales@sensitron.com Page 1  
SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
COMMUTATION TRUTH TABLE  
This table shows the Phase Output state versus the state of the Hall-Effect and Direction Inputs. The commutation  
coding shown reflects Hall-Effect sensors that are spaced at 120o 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  
PHASE OUTPUTS  
Dir  
1
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
A
B
C
.
Hi-Z  
Sink  
Sink  
Hi-Z  
Sink  
Hi-Z  
Source Hi-Z  
Source Sink  
Source  
Source  
1
1
1
1
1
0
0
0
0
0
0
X
X
Source Hi-Z  
Source Sink  
Sink  
Hi-Z  
Sink  
Sink  
Hi-Z  
Source Sink  
Source Hi-Z  
Source Hi-Z  
Hi-Z  
Sink  
Source  
Source  
Hi-Z  
Sink  
Hi-Z  
Hi-Z  
Hi-Z  
Source Sink  
Hi-Z  
Hi-Z  
Hi-Z  
Hi-Z  
Part Number  
Motor  
Supply  
Voltage  
Motor  
Peak  
Voltage  
Average  
Output  
Current  
Peak  
Output  
Current  
Rds(on)  
Hermetic?  
ID =20A  
SMC6M40-10-YY  
60  
60  
100  
100  
250  
250  
40  
40  
40  
40  
60  
60  
60  
60  
15  
15  
60  
60  
Yes  
No  
SMC6M40-10-1-YY  
SMC6M40-25-YY  
SMC6M40-25-1-YY  
150  
150  
Yes  
No  
PART NUMBER/SELECTOR GUIDE TABLE  
Current Sense Resistor value and lead bend options shall be:  
SMC6M40-XX-1-YYZ where YY is the sense resistor value and Z is the lead bend option if needed  
Part number SMC6M40-XX-1-10B has a 10mOhm resistor, and option B lead bend.  
For an open frame without a cover add –O to the part number.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
World Wide Web - www.sensitron.com E-mail Address - sales@sensitron.com Page 2  
SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
ABSOLUTE MAXIMUM RATINGS  
Characteristic  
Maximum  
Motor Supply Voltage SMC6M40-10  
SMC6M40-25  
80 V  
200  
Motor Peak Voltage SMC6M40-10  
SMC6M40-25  
100 V  
250V  
Average Output Current  
40 A  
Peak Output Current  
60 A  
Control Supply Voltage VCC  
Logic Input Voltage (Note 1)  
Reference Source Current  
18 V  
-0.3 V to +8 V  
-30 mA  
Logic Input Voltage  
-0.3 to +8 V  
-0.3 to +10 V  
±8 mA  
Error Amplifier Input (EA1+/EA1-)  
Error Amplifier Output Current  
Spare Amplifier Input Voltage (EA2+/EA2-)  
Spare Amplifier Output Current  
Current Sense Amplifier Input Voltage (ISH/ISL)  
Current Sense Amplifier Output Current  
Tachometer Output Current  
PWM Input Voltage  
Operating & Storage Junction Temperature  
Power Devices Thermal Resistance RthjC  
Pin-to-Case Voltage Isolation, at room conditions  
Lead Soldering Temperature, 10 seconds maximum, 0.125” from case  
* Tcase = 25° C  
-0.3 to +10 V  
±8 mAdc  
-0.3 V to +6 V  
±10 mAdc  
+/- 10 mA  
- 0.3 V to +6 V  
-55 oC to +150 oC  
1.0 oC/W  
600V DC  
300°C  
Recommended Operating Conditions (TC=25 oC)  
Characteristic  
Maximum  
Motor Supply Voltage SMC6M40-10  
SMC6M40-25  
Average Output Current  
60 V  
150 V  
30 A  
for SMC6M40-XX, TC=80oC  
Control Supply Voltage VCC  
15 V +/-10%  
Note 1: Logic Inputs: Direction, Hall Inputs (H1...H3) Over-voltage - Coast, Speed, and Quad Select.  
Note 2: The internal current sense resistor is limited to 6 Watt dc power dissipation. Other values are available.  
Please contact the factory for more information.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
World Wide Web - www.sensitron.com E-mail Address - sales@sensitron.com Page 3  
SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
MIN.  
TYP.  
MAX.  
UNITS  
PARAMETER SYMBOL CONDITIONS (NOTE 1)  
Power Output Section  
Drain-Source Leakage Current IDss at 0.8VDss  
Diode Forward Voltage VF at IF = 20 A  
Diode Reverse Recovery Time trr IF = 20A, di/dt = -100A/usec,  
Drain-to-Source On-Resistance Rds(on) ID =20A  
100V, 40A Device, SMC6M40-10  
250  
1.0  
300  
uA  
V
nSec  
15  
60  
250V, 40A Device, SMC6M40-25  
mΩ  
VCC =12V Note (3)  
Control Section  
Control Supply Current Icc at Vcc =12V  
Control Turn-On Threshold Vcc(+) Tc over operating range  
Driver Turn-On Threshold Vcc(+) Tc over operating range  
5V Reference Section  
30  
11.0  
10.0  
mA  
V
V
9.0  
8.0  
10.5  
9.0  
Output Voltage Vref  
Output Current Io  
4.7  
-
-
5.0  
-
-
5.3  
30  
30  
V
mA  
mV  
Load Regulation Iload = 0mA to –20mA  
Error Amplifier / Spare Amplifier Sections  
EA1 / EA2 Input Offset Current Ios V(pin 2) = V(pin 4) = 0V  
V(pin 3) = V(pin 6) = 0V  
EA1 / EA2 Input Bias Current Iin V(pin 2) = V(pin 4) = 0V  
V(pin 3) = V(pin 6) = 0V  
-
-
6
75  
nA  
nA  
100  
500  
Input Offset Voltage, VCM=0V  
Amplifier Input Common-mode Voltage Range Vcc=12V  
Amplifier Output Voltage Range VOH  
Amplifier Output Voltage Range VOL  
PWM Comparator Section  
-
1.5  
-
11  
0.1  
5
9
-
mV  
V
V
0
10  
-
0.5  
V
Propagation Delay Time  
Input Common Mode range  
70  
2.0  
-
150  
8.0  
nsec  
V
Current-Sense Amplifier Section  
ISH / ISL Input Voltage Range  
Input Offset Voltage  
Input Bias Current  
Amplifier Voltage Gain  
High Level Output Voltage, Iout =-100 uA  
Low Level Output Voltage , Iout =100 uA  
Output Source Current  
-0.5  
-
5
4.75  
6.0  
-
-
-
Vcc – 1.0  
8
V
mV  
uA  
V
V
mV  
uA  
10  
5.0  
-
-
-
15  
5.25  
-
70  
-
300  
Over-Current Comparator  
Input Common-mode Range  
Propagation Delay Time  
0.0  
40  
-
50  
260  
V
nsec  
170  
Logic Input Section  
H1, H2, H3 High-Level Input Voltage Threshold  
H1, H2, H3 Input Hysteresis  
H1, H2, H3 Input Current, 0.0 < Vin <5.0V  
1.7  
0.6  
-
1.9  
-
-30  
2.1  
1.0  
-
V
V
uA  
Coast, Start/Stop High-Level Input Voltage Threshold  
Coast, Start/Stop Low -Level Input Voltage Threshold  
3.6  
-
-
-
-
V
V
1.9  
Quad, Brake, Dir in High-Level Input Voltage Threshold  
Quad, Brake, Dir in Low-Level Input Voltage Threshold  
3.6  
-
-
-
-
V
V
1.9  
Tachometer  
Tachometer Output High Level Voh  
Tachometer Output Low Level Vol  
Tachometer On-Time ton  
Tachometer On-Time Variation  
4.7  
-
130  
5.0  
-
140  
5.3  
50  
150  
V
mV  
us  
Speed Input Threshold Voltage Vth  
Oscillator Section  
Oscillator Frequency fo  
Over-Temperature Shutdown  
Trip Temperature  
0.200  
16  
0.250  
18  
0.280  
20  
V
kHz  
135  
115  
145  
125  
155  
135  
Reset Temperature  
oC  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
SPECIFICATION NOTES:  
1- All parameters specified for Ta = 2 C, Vcc = 15Vdc, and all Phase Outputs unloaded. 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- Pulse Test: Pulse Width < 300 µSec, Duty Cycle < 2%.  
PINOUTS  
PIN#  
1
2
3
4
5
6
7
8
NAME  
PIN#  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
NAME  
VCC  
Speed Input  
Direction Input  
CSH  
EA1 “-” Input  
EA2 “+” Input  
EA1 “+” Input  
+5V Reference Output  
EA2 “-” Input  
EA2 Output  
EA1 Output  
Ioc Ref  
CSL  
+VDC Return  
+VDC Return  
Source C  
Source C  
9
Phase C Output  
Phase C Output  
+VDC  
Source B  
Source B  
Phase B Output  
Phase B Output  
+VDC  
Source A  
Source A  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
Direction Out  
Iso  
ISH  
ISL  
Quad Select Input  
Tachometer Output  
Brake Input  
Over-voltage/Coast Input  
Start/Stop Input  
Ground  
HC Input  
HB Input  
HA Input  
39  
40  
41  
42  
43  
(Case)  
Phase A Output  
Phase A Output  
+VDC  
(No Connection)  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Fig. 2: Mechanical OutlineForHermeticPackage,FLPK1, SMC6M40-XX
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Fig. 3: Mechanical Outline For Plastic Case Package, FLPK1-1  
SMC6M40-XX-1  
For Option B part number is SMC6M40-XX-1-YYB, for Option C part number is SMC6M40-XX-1-YYC,  
Where YY is the Current Sense Resistor Value in m Ohms 05,10,30,…..  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Pin Descriptions  
Vcc ( Pin 1 ), is the input biasing supply connection for the controller. Under-voltage lockout  
keeps all outputs off for Vcc below 10.5V. Vcc pin should be connected to an isolated 15V  
power supply. The return of Vcc is pin 19.  
EA1- ( Pin 2 ), is the error amplifier inverting input.  
EA2+ ( Pin 3 ), is the non-inverting input of a spare amplifier.  
EA1+ ( Pin 4 ), is the error amplifier non-inverting input. EA1- and EA1+ are not internally  
committed to allow for a wide variety of uses. They can be connected to Io for current-mode  
control, or Tach output for voltage-mode control.  
+5V Ref( Pin 5 ), is a 5V reference with 30mA of maximum available output current. This pin  
should bypassed to Gnd with 1-5µF capacitor depending on the load current.  
EA2- ( Pin 6 ), is the inverting input of a spare amplifier.  
EA2 ( Pin 7 ), out is the output of a spare amplifier.  
EA1 ( Pin 8 ), out is the output of the error amplifier and is internally connected to the PWM  
comparator.  
Ioc-Ref ( Pin 9 ), is the over-current reference voltage. It is internally set to 1.15V. This  
reference can be reduced by connecting a resistor between Ioc Ref and Gnd . The resistor  
value is  
R= (Ioc-Ref) /(0.05 - 0.043*(Ioc-Ref)) KΩ  
(1)  
Also, Ioc Ref can be increased by connecting a resistor between Ioc Ref and the 5V  
reference. The resistor value is  
R= (5.0 – (Ioc-Ref))/(0.043*(Ioc-Ref) – 0.05) KΩ  
(2)  
This pin is connected to the over-current comparator for cycle-by-cycle current limiting. The  
over-current reference voltage is set according to the formula  
Ioc-Ref=Rs*Ip*5 volts  
(3)  
Where Rs is the current sense resistor value in ohms and Ip is peak current limit in amperes.  
Dir out ( Pin 10 ), is direction output representing the actual direction of the rotor as  
decoded from the hall sensors. There are two valid transitions of the hall sensor inputs; one  
translates to a clockwise rotation and another which translates to a counterclockwise rotation.  
The polarity of Dir-out is the same as Dir-in while motoring.  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Is-out ( Pin 11 ), is the absolute value output of the current sense amplifier.  
Is-out = ABS(ISL – ISH) (4)  
ISH ( Pin 12 ), is the non-inverting input of the current sense amplifier.  
ISL ( Pin 13 ), is the inverting input of the current sense amplifier.  
Quad ( Pin 14 ), is the select input of two-quadrant (Quad=0) or four-quadrant (Quad=1)  
operation.  
Tach-out ( Pin 15 ), is a fixed pulse width variable frequency output proportional to the  
motor speed. A pulse is generated at both rising and falling edges of HA, HB, HC inputs. So  
this output can be used as a true tachometer for speed feedback with an external filter or  
averaging circuit which usually consists of a resistor and capacitor, as shown in Figs 9 & 10.  
Brake ( Pin 16 ), is a digital input which causes the device to inter into brake mode. In brake  
mode all three low-side switches are turned off and high-side switches are turned on. The  
only conditions that can inhibit the high-side command during brake mode are UVLO, the  
output of the PWM comparator, Coast input, or Start/Stop input.  
Coast ( Pin 17 ), is a digital input that disables all outputs once pulled high. This input is  
internally pulled low.  
Start/Stop ( Pin 18 ), is a digital input that disables all outputs once pulled low. This input is  
pulled high internally. This input can be used as enable/disable input using a switch. If the  
switch is opened, the controller is enabled. If the switch is closed to Gnd, the controller is  
disabled.  
Signal Gnd ( Pin 19 ), is the reference ground for all control signals of the device. All bypass  
capacitors, loop compensation components must be connected as close as possible pin 19.  
This pin should not be externally connected to the power ground pins 27 and 28.  
HC ( Pin 20 ), is hall input of phase C.  
HB ( Pin 21 ), is hall input of phase B.  
HA ( Pin 22 ), is hall input of phase A.  
HA, HB, HC are designed to accept rotor position information from hall sensors positioned  
120o apart. Motors with 60o position sensing may be used if one or two of the hall-effect  
sensor signals is inverted prior to connection to the hall-effect inputs.  
HA, HB, HC inputs are internally pulled up, zener clamped to 6.2V, and filtered.  
Speed-in ( Pin 23 ), is a speed input to latch the direction input when the motor is spinning  
fast.  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Dir-in ( Pin 24 ), is the direction digital input. Logic “H’ correspond to forward rotation, and  
logic “L” correspond to reversed rotation.  
The direction input can be latched by Speed-in input. As long as Speed-in is less than  
0.250V, the direction latch is transparent. When Speed-in is higher than 0.250V changing  
direction of rotation will enable coast until the Speed-in drops below 0.250V. Direction latch is  
recommended in two-quadrant operation mode to allow the motor to coast to a safe speed  
before reversing.  
CSH ( Pin 25 ),is the positive terminal of the current sense resistor.  
CSL ( Pin 26 ),is the negative terminal of the current sense resistor.  
The current sense terminals produce a differential voltage equal to the motor current times  
the sense resistance (5 or 10 mtypical). There is an internal 2nF filter capacitor across pins  
25 and 26, There is also a 100 resistor between each pin and each end of the current  
sense resistor. Pins 25 and 26 shall be externally connected to pins 12 and 13 to activate  
the cycle-by-cycle current limiting.  
+VDC Rtn ( Pins 27 & 28 ), are the motor supply return. Pins 27 and 28 should not be  
connected to the signal Gnd pin 19.  
Source Terminals ( Pin 29, 30, 34, 35, 39, 40 ), are the source terminals of the three arms  
of the three-phase bridge. These pins shall be shorted together externally using a low  
impedance bus to minimize power loss.  
Phase C Outputs ( Pin 31, 32 ), are phase C terminals. Both terminals shall be used.  
Phase B Outputs ( Pin 36, 37 ), are phase B terminals. Both terminals shall be used.  
Phase A Outputs ( Pin 41, 42 ), are phase A terminals. Both terminals shall be used.  
+VDC ( Pins 33, 38, 43 ), are the motor input power supply positive terminal. These pins  
shall be shorted together externally using a low impedance bus. +VDC bus should bypassed  
to +VDC Rtn with adequately voltage-rated low ESR capacitor, whose value can is least 10-  
15µF per ampere of average motor current.  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Application Information  
60o Rotor Position Sensing  
SMC6M40-XX is designed to operate with 120o position sensing encoding. In this  
format, the three position sensor signals are never simultaneously high or low. Motors  
whose sensors provide 60o encoding can be converted to 120o using the circuit shown  
in Fig. 4.  
Two-Quadrant vs Four-Quadrant  
In two-quadrant mode only one switch is modulated at any time while in four-quadrant  
operation two switches are modulated. This results in a more efficient controller and less EMI  
emission when operating in two-quadrant mode. However, two-quadrant mode has some  
limitations as explained below.  
Fig. 5 illustrates the four possible quadrants of operation for a motor. Two-quadrant mode  
refers to a motor operating in quadrants I and III. With a two-quadrant BDC motor, friction is  
the only force to decelerate the load. Four-quadrant control provide controlled operation in all  
quadrants, including II and IV, where torque and rotation are of opposite directions.  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
When configured in two-quadrant mode, Quad=0, SMC6M40-XX modulates only the high-side  
devices of the output power stage. The current paths within the output stage during the PWM  
on and off times are illustrated in Fig. 6. During the on time, both switches S1 and S4 are on,  
the current flows through both switches and the motor winding. During the off time, the upper  
switch S1 is shut off, and the motor current circulates through the lower switch S4 and D2.  
The motor is assumed to be operated in quadrants I or III.  
If operation is attempted in quadrants II or IV by changing the Dir input, S1 and S4 are turned  
off and S2 and S3 are turned on. Under this condition motor current very quickly decays,  
reverses direction and increases until the over-current limit is reached. At this point, S3 turns  
off the current circulates in S2 and D4, and continue to rise due to the fact that the back emf  
is in-phase with the current because the motor direction has not changed yet. Fig. 7 illustrates  
the current path in this case. Under these conditions there is nothing to limit the current other  
than the controller and the motor impedance. These circulating currents can result in damage  
to the power stage if the load inertia is high.  
In four-quadrant mode, Quad=1, both upper and lower switches are modulated. Motor current  
always decays during off time, eliminating any uncontrolled circulating current. In addition, the  
current always flows through the current sense resistor. Fig. 8 illustrates the current paths  
during torque reversal.  
It is recommended in two-quadrant operation to utilize the speed input, pin 23, for safe  
direction reversal. The direction input can be latched by speed input. As long as Speed-in is  
less than 0.250V, the direction latch is transparent. When Speed-in is higher than 0.250V  
changing direction of rotation will enable coast until the Speed-in drops below 0.250V. The  
Speed-in signal is obtained by low-pass filtering the Tach output, pin 15, using RC filter.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
Control Modes  
Typically, speed regulation is achieved by regulating the average input voltage to the motor,  
while torque regulation is achieved by current control. Voltage and current control loops may  
be combined to achieve a specific speed-torque curve.  
Voltage-Mode Control  
Fig. 9 shows the implementation of a typical speed control loop. A voltage command  
proportional to the desired speed is applied at pin4 and can be set by a potentiometer, R3.  
The speed feedback signal is obtained by low-pass filtering the Tach, pin15, output using R1  
and C1. Small signal compensation of the speed control loop is provided by an internal error  
amplifier. The integrating capacitor C2 places a pole at 0 HZ and a zero in conjunction with  
R2. This zero can be used to cancel the low-frequency motor pole and to cross the loop with –  
20dB gain response.  
The output of the error amplifier is connected to the PWM comparator. Since the motor speed  
is proportion to the average phase voltage, the speed is controlled via duty cycle control.  
For open loop speed control, pin 2 shall be shorted to pin 8. The error amplifier acts as a  
voltage follower and buffer to the command input.  
Cycle-by-cycle current limiting is provided by connecting pins 25 and 26 to pins 12 and 13.  
The over-current limit is set by the over-current reference IocRef at pin 9. This reference is set  
internally to 1.15V, and can be altered using a resistor externally, see equations (1) to (4) for  
details. The current signal is filtered internally, and amplified with a gain of 5.  
Current Mode Control  
Fig. 10 shows the implementation of a typical torque control loop. A voltage command  
proportional to the desired current is applied at pin 4 and can be set by a potentiometer, R3.  
The current feedback signal, Iso at pin11, is obtained by the internal current sensor and the  
absolute value amplifier. Small signal compensation of the feedback control loop is provided  
by an internal error amplifier. The error amplifier output is connected to the PWM comparator.  
Since the torque is proportional to the average phase current, the torque is controlled via duty  
cycle control.  
It is recommended to set the over-current limit reference IocRef at pin 9 at a value slightly  
higher than the maximum peak command current. This will maintain the cycle-by-cycle  
current limiting even if the error amplifier saturates during large signal disturbance.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
World Wide Web - www.sensitron.com E-mail Address - sales@sensitron.com Page 14  
SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
DC Bus Filtering  
To minimize the circuit parasitic inductance effect on the power stage, the layout of Fig. 11 is  
suggested. C1, C2, and C3 are 0.1µF to 0.5µF ceramic capacitors, connected across each leg  
of the three-phase bridge. Also, a bulk polarized capacitor C4 of 10µF to 15 µF per ampere of  
average motor current should be connected across the DC bus.  
Cleaning Process:  
Suggested precaution following cleaning procedure:  
If the parts are to be cleaned in an aqueous based cleaning solution, it is recommended that the  
parts be baked immediately after cleaning. This is to remove any moisture that may have  
permeated into the device during the cleaning process. For aqueous based solutions, the  
recommended process is to bake for at least 2 hours at 125oC.  
Do not use solvents based cleaners.  
Recommended Soldering Procedure:  
Signal pins 1-26: 210C for 10 seconds max  
Power pins 27 to 43: 260C for 10 seconds max.  
221 West Industry Court Deer Park, NY 11729 (631) 586 7600, FAX 631 242 9798 •  
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SMC6M40-10  
SMC6M40-10-1  
SMC6M40-25  
SMC6M40-25-1  
SENSITRON  
SEMICONDUCTOR  
TECHNICAL DATA  
DATA SHEET 1023, REV. E  
DISCLAIMER:  
1- The information given herein, including the specifications and dimensions, is subject to change without prior notice to improve product  
characteristics. Before ordering, purchasers are advised to contact the Sensitron Semiconductor sales department for the latest version of the  
datasheet(s).  
2- In cases where extremely high reliability is required (such as use in nuclear power control, aerospace and aviation, traffic equipment, medical  
equipment , and safety equipment) , safety should be ensured by using semiconductor devices that feature assured safety or by means of users’  
fail-safe precautions or other arrangement .  
3- In no event shall Sensitron Semiconductor be liable for any damages that may result from an accident or any other cause during operation of  
the user’s units according to the datasheet(s). Sensitron Semiconductor assumes no responsibility for any intellectual property claims or any  
other problems that may result from applications of information, products or circuits described in the datasheets.  
4- In no event shall Sensitron Semiconductor be liable for any failure in a semiconductor device or any secondary damage resulting from use at  
a value exceeding the absolute maximum rating.  
5- No license is granted by the datasheet(s) under any patents or other rights of any third party or Sensitron Semiconductor.  
6- The datasheet(s) may not be reproduced or duplicated, in any form, in whole or part, without the expressed written permission of Sensitron  
Semiconductor.  
7- The products (technologies) described in the datasheet(s) are not to be provided to any party whose purpose in their application will hinder  
maintenance of international peace and safety nor are they to be applied to that purpose by their direct purchasers or any third party. When  
exporting these products (technologies), the necessary procedures are to be taken in accordance with related laws and regulations.  
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