Ceramate CMD1668M Two-phase unipolar drive brushless motor driver Datasheet

CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
Package Dimensions
8
14
4.4
Functions and Features
1
7
0.15
1.5
8.0
0.1
• Output protection Zener diodes with variable breakdown
voltages
— When the Z1 and Z2 pins are open: VOLM = 57 V
— When the Z1 and Z2 pins are shorted: VOLM = 32 V
— An external Zener diode can be connected between
Z1 and VCC.
• Can support both 12-V and 24-V power supplies by
changing an external resistor.
• Hall elements can be connected directly.
• 1.5-A output current output transistors built in
• Built-in rotation detection function that outputs low
when driven and high when stopped (CMD1668M)
• FG signal function that sets FG high when IN- is low,
and sets FG low when IN- is high (CMD1667M)
• Motor lock protection and automatic recovery functions
built in
• Thermal shutdown function
0.625
[CMD1668M, 1667M]
5.15
6.4
The CMD1668M Series are 2-phase unipolar drive brushless unit: mm
motor drivers that feature a wide usable voltage range and
a minimal number of required external components. They
also support the formation of motor lock protection and
automatic recovery circuits.
1.8max
Overview
0.35
1.0 1.0
SOP-14
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 1 of 9
Rev 1.0 Aug. 23,2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum input current
Symbol
ICC max
Conditions
Ratings
t ≤ 20 ms
Unit
200
mA
Output voltage
VOUT
Internal
Output current
IOUT
1.5
A
Output minus current
IOM
–50
mA
IRD/IFG
10
mA
VRD/VFG
30
V
0.8
W
RD/FG influx current
RD/FG voltage
Allowable power dissipation
Pd max
CMD1667M, 1668M: Mounted on a printed circuit board
(20 × 15 × 1.5 mm3, glass epoxy)
V
Operating temperature
Topr
–30 to +80
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Allowable Operating Ranges at Ta = 25°C
Parameter
Input current range
Common-mode input voltage range
Symbol
Conditions
ICC
6.0 to 50
VICM
mA
0 to VIN –1.5
V
Electrical Characteristics at Ta = 25°C, ICC = 10 mA
Parameter
Output limit voltage
Output saturation voltage
VIN voltage
Amplifier input offset voltage
Amplifier input bias current
Symbol
Conditions
Ratings
min
typ
max
Unit
VOLM1
Z1, Z2 open
54
57
60
VOLM2
Z1, Z2 short
31
33
35
V
Vosat1
IO = 0.5 A
0.95
1.2
V
Vosat2
IO = 1.0 A
1.15
1.5
V
Vosat3
IO = 1.5 A
1.4
2.0
V
6.4
6.7
7.0
V
VOFF
–7.0
0
+7.0
mV
IBA
–250
VIN
ICC = 7.0 mA
V
nA
RD output saturation voltage
VRDsat
IRD = 5 mA*
0.1
0.3
V
FG output saturation voltage
VFG sat
IFG = 5 mA*
0.1
0.3
V
C outflow current
IC1
2.1
3.0
3.9
µA
C discharge current
IC2
0.31
0.44
0.59
µA
VTH1
0.77
0.8VIN
0.83
V
VTH2
0.42
0.45VIN
0.48
Comparator input threshold voltage
Thermal shutdown current operating temperature
Thermal shutdown circuit hysteresis
V
TSD
Design target value
180
°C
∆TSD
Design target value
40
°C
Note: * RD output: CMD1668M, FG output: CMD1667M
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 2 of 9
Rev 1.0 Aug. 23,2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
Block Diagram and Application Circuit
• CMD1667M
• CMD1668M
Truth Table (CMD1667M)
IN+
IN–
C
OUT1
OUT2
FG
H
L
L
H
L
H
L
H
L
L
H
L
H
L
H
H
H
H
L
H
H
H
H
H
OUT2
RD
14
13
VIN RD
12
Z2
11
9
10
Z1 OUT2 NC
8
NC
CMD1668M, CMD1667M
Truth Table (CMD1668M)
IN+
Pin Assignments
IN–
C
OUT1
H
L
L
H
L
L
IN-
IN+
C
L
H
L
L
H
L
1
2
3
H
L
H
H
H
H
L
H
H
H
H
H
NC OUT1 NC GND
4
5
6
7
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 3 of 9
Rev 1.0 Aug. 23,.2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
CMD1668M Sample Application Circuits
• 12-V power supply type
• 24-V power supply type
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 4 of 9
Rev 1.0 Aug. 23,2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
• Circuit for use when large output currents are required and heat dissipation is high.
CMD1667M Sample Application Circuits
• 12-V power supply type
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 5 of 9
Rev 1.0 Aug. 23,.2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
• 24-V power supply type
• Circuit for use when large output currents are required and heat dissipation is high.
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 6 of 9
Rev 1.0 Aug. 23,.2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
Design Documentation (See the application circuit diagrams)
1. Power-supply voltage (VIN pin)
The resistor R1 (when VCC = 12 V R1 = 330 Ω, and when VCC = 24 R1 = about 1.2 kΩ) is inserted between VIN and
the power supply VCC pin. When the ICC current is set in the range 6 to 50 mA, the VIN pin will be regulated to be
6.7 V. Not only does this provide stability with respect to power-supply voltage variations and motor kickback, but it
also provides adequate strength to withstand surges.
2. Output transistors (OUT1 and OUT2 pins)
A Zener diodes with the following characteristics is inserted between the collector and base of each output transistor
to absorb kickback voltages at 57 V (typical) and provide output protection.
Sustained output voltage : VO = 65 V minimum (design guarantee)
Output current
: IO = 1.5 A maximum
Output saturation voltage : VO sat = 1.25 V/1.0 A (typical)
Safe operating range
: IO = 1.0 A, VOLM = 57 V, t = 200 µs
3. Output circuit kickback voltage protection (Z1 and Z2 pins)
These ICs support output protection that minimizes kickback noise by changing the kickback absorption voltage and
absorption method according to the output current and power-supply voltage used.
— When the Z1 and Z2 pins are shorted
The output protection voltage will be 32 V (typical) using a VCC = 12 V power supply.
— When the Z1 and Z2 pins are open
The output protection voltage will be 57 V (typical) using a VCC = 24 V power supply.
— With a Zener diode inserted between Z1 and VCC or between Z1 and ground
This technique handles 120 mm H speed applications which require large output currents and involve large
amounts of heat generated in the IC by dissipating the motor coil switching loss in external Zener diodes.
4. Output protection when the motor is lock (C, RD, and FG pins)
This circuit detects motor stopping due to, for example, overloading, and cuts the coil current. It also automatically
recovers drive and motor turning from the output stopped state when the load returns to an appropriate level. The lock
detection time is set with the value of an external capacitor.
When C = 0.47 µF
Lock detection time: about 1 second
Lock protection time (output on): about 0.5 second
(output off): about 3 seconds
The RD pin (CMD1668M) is an open collector output and outputs a low level during drive and a high level when stopped.
The FG pin (CMD1667M) is an open collector output and is switched between high and low by the drive phase. It goes to
the high level when the motor is stopped.
5. Thermal shutdown
This circuit turns the output off in response to coil shorting or IC overheating.
6. In applications that use an external transistor to turn the cooling fan power on and off, connect a capacitor of about
0.47 to 10 µF between the fan power supply VCC and ground to provide a regenerative route for the fan motor coil
current.
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 7 of 9
Rev 1.0 Aug. 23,.2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
Automatic Recovery Circuit C-Pin Voltage
1. While the blades are turning, the capacitor is charged with a current of about 3 µA (typical), and C is discharged by
pulses that correspond to the motor speed.
2. When the blades lock, the capacitor is no longer discharged, and the voltage across the capacitor increases. The
output is turned off when that voltage reaches 0.8 × VIN.
3. When the output is turned off, the capacitor is discharged at about 0.44 µA (typical). When the capacitor voltage falls
under VTH2, if the lock state is not yet cleared the capacitor continues discharging until VTH1. (Note that the output is
turned on at this time.) These operations, i.e. items 2. and 3., are repeated with a ton:toff ratio of about 1:6 to protect
the motor.
4. If the lock is cleared at the point the capacitor voltage reaches VTH2, motor rotation is started by turning the output
on.
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 8 of 9
Rev 1.0 Aug. 23,.2004
Fax:886-3-3521052
CMD1668M,CMD1667M
Two-Phase Unipolar Drive Brushless Motor Drivers
LB1668, 1667
LB1668M, 1667M
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Email: [email protected]
Tel:886-3-3214525
Http: www.ceramate.com.tw
Page 9 of 9
Rev 1.0 Aug. 23,2004
Fax:886-3-3521052
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