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LS7560N 데이터시트 PDF




LSI Computer Systems에서 제조한 전자 부품 LS7560N은 전자 산업 및 응용 분야에서
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부품번호 LS7560N 기능
기능 BRUSHLESS DC MOTOR CONTROLLER
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LS7560N 데이터시트, 핀배열, 회로
LSI/CSI
LS7560N
LS7561N
U® L LSI Computer Systems, Inc. 1235 Walt Whitman Road, Melville, NY 11747 (631) 271-0400 FAX (631) 271-0405
A3800
BRUSHLESS DC MOTOR CONTROLLER
April 2012
FEATURES
• Open loop motor control
• Tachometer output for closed loop motor control
• Error Amplifier and PWM Speed Comparator with full accessibility
• High noise immunity Schmitt Triggers on Sensor inputs
• 5.5V Reference Supply for external sensors
• Cycle-by-cycle current sensing
• Static, or current limited dynamic, motor braking
• Output enable delay on speed direction reversal
• Enable input with fault sensing capability
• Fault Indicator output
• 60°/300° or 120°/240° electrical sensor spacing selection
• Selectable PWM of top and bottom drivers or bottom drivers only
• CMOS compatible motor outputs with drive capability
• Selectable top driver polarity
• Low power dissipation
• +10V to +18V Power Supply (VDD - VSS)
LS7560N, LS7561N (DIP); LS7560N-S, LS7561N-S (SOIC);
LS7560N-TS, LS7561N-TS (TSSOP) - See Figure 1 -
Note: LS7560N/LS7561N are backward compatible with LS7560/LS7561
FIGURE 1. PIN CONNECTION DIAGRAM
TOP VIEW
SEQUENCE SELECT 1
ENABLE 2
FAULT INDICATOR 3
RC 4
TACHOMETER OUT 5
ERROR AMP (+) 6
28 V DD (+V)
27 F/R
26 S3
25 S2
24 S1
HALL
SENSORS
23 BRAKE
ERROR AMP (-) 7
ERROR AMP OUT 8
OSCILLATOR 9
CURRENT SENSE (+) 10
22 BRAKE SELECT
21 PWM CONTROL
20 TOP DRIVER POLARITY SELECT
19 V R
CURRENT SENSE (-) 11
OUT 6 12
OUT 5 13
18 V SS (-V)
17 OUT 1
16 OUT 2
GENERAL DESCRIPTION
The LS7560N/LS7561N are designed to control three or four
phase brushless DC motors in a closed or open loop con-
figuration. The IC consists of a decoder which provides proper
commutation sequencing, a frequency-to-pulse width convert-
er and error amplifier for closed loop motor speed control, a
PWM comparator and sawtooth oscillator for external driver
power control and a 6V reference generator for supplying pow-
er to motor sensors. Also included is Fault detection and in-
dication, overcurrent sensing, dynamic motor braking, forward/
reverse input, sensor spacing selections and an enable input
control. The overcurrent sense condition will disable all output
drivers when using the LS7560N and only the bottom drivers
when using the LS7561N.
The IC operates from 10V to 18V and provides CMOS com-
patible outputs for interfacing with external power devices.
Operating below 10V will activate a Fault Indication Output
and disable all Output Drivers.
INPUT/OUTPUT DESCRIPTION: (See Figure 2)
SEQUENCE SELECT Input (Pin 1 )
A High on this input selects 60°/300° and a Low selects
120°/240° electrical sensor separation. Use of a 300° or 240°
motor will cause opposite direction rotation as compared to a
60° or 120° motor.
F/R Input (Pin 27)
A High on this input selects Forward direction and a Low se-
lects Reverse direction. The motor drive outputs are disabled
for 2 clock cycles at the onset of a direction change.
OUT 4 14
15 OUT 3
S1, S2, S3 Inputs (Pins 24, 25, 26)
Hall Sensor inputs which are decoded to determine the Motor
Commutation Sequence. An invalid input code disables all motor
outputs. Inputs have Schmitt Trigger buffers for noise immunity.
BRAKE Input (Pin 23)
With the Brake Select input Low, a High on the Brake input forces
the Top Drivers to an Off condition and the Bottom Drivers to a
PWM On condition. If the Motor is under Closed Loop control, the
Loop must be opened and the error amplifier output connected to
the Error Amp (-) input. By controlling the voltage at the Error Amp
(+) input, the PWM duty cycle is controlled during braking (see Fig-
ure 8). This manner of braking prevents the Bottom Motor Drivers
from drawing excessive current, a condition which can occur during
normal braking, when the Bottom Drivers are turned ON un-
conditionally. With the Brake Select input High, a High on the
Brake input unconditionally causes the Top Drivers to turn Off and
the Bottom Drivers to turn On. The Brake function has priority over
all other functions.
BRAKE SELECT Input (Pin 22)
A Low on this input selects PWM control of braking and a High se-
lects unconditional braking.
ENABLE Input (Pin 2)
When the Enable input is above VR/2, all Output Drivers are en-
abled and when it is below VR/2.2, all Output Drivers are disabled.
This input has a nominal hysteresis of 0.05VR, where VR is the in-
ternally generated Reference Voltage available on Pin 19. Because
the Enable input is level sensitive, it can easily be used to control
operation of the IC based on an Analog Fault Condition.
7560N-042512-1




LS7560N pdf, 반도체, 판매, 대치품
VR VR VR
SEQUENCE
SELECT In
1
VR
26
SENSOR
Inputs 25
24
F/R 27
ENABLE
In
2
DECODER
VR
VR/2 +_
FREQUENCY
TO
PULSE WIDTH
CONVERTER
VR 19
RC In 4
TACHOMETER 5
Out
LOW VR DETECT
ERROR AMP (-) 7
ERROR AMP (+) 6
_
ERROR
AMP
+
ERROR AMP Out 8
_
PWM
+GEN.
OSCILLATOR 9
FAULT INDICATOR Out
3
PWM CONTROL
In
21
VR
REFERENCE
GENERATOR
VDD
LOW VDD
DETECT
VDD
CONTROL
SWITCH
EDGE TRIGGERED
DELAY
RQ
S
VR
TOP DRIVER
POLARITY SELECT In 20
VDD
SWITCH
CONTROL
VDD
VDD
VDD
17 O1
16 O2 TOP
DRIVER
Outputs
15 O3
VDD
14 O4
VDD
13 O5
VDD
BOTTOM
DRIVER
Outputs
12 O6
VR
22 BRAKE SELECT
VR
23 BRAKE In
+V 28 VDD
-V 18 VSS
OVERCURRENT
SENSE In
10
11 - +
100mV
+
_
7560N-030906-4
SQ
R
FIGURE 2. LS7560N / LS7561N MOTOR CONTROLLER BLOCK DIAGRAM
INTERNAL BOND PAD
NC FOR LS7560N
VDD FOR LS7561N

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LS7560N 전자부품, 판매, 대치품
19 V R
OUT1 17
2 ENABLE
OUT3 15
20 TOP DRIVER
POLARITY
SELECT
OUT4 14
23
BRAKE
12
OUT6
(+) 10
OVERCURRENT
SENSE
(-) 11
VM
FIGURE 7. FOUR-PHASE HALF-WAVE MOTOR CONTROLLER
FIGURE 7. This four phase half wave motor controller uses the same Brake circuit as in Figure 4 and switches
the Top Driver Select from a high to a low as in Figure 6.
VR
BRAKE
*
TYPICAL
VALUES
BRAKE
BRAKE
22 BRAKE
SELECT
23
BRAKE
100k
TACH OUT 5
* R2
(-) 7
BRAKE
*
R1
1M
ERROR
AMP
OUT
(+)
8
6
BRAKE
BRAKE
VR
*
C1
0.1µF
BRAKE
BRAKE
BRAKE
BRAKE
VR
FIGURE 8. PWM BRAKING
SPEED
CONTROL
PWM RATE
CONTROL
FIGURE 8.
Using an analog switch (such as the CD4066) PWM Braking can be employed when the brake is applied.
At that time, the error amplifier is configured as a voltage follower and its input is switched from the
speed adjustment control to the PWM rate control. By adjusting the PWM rate control, the average motor
current during braking can be controlled.
7560N-030906-7

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관련 데이터시트

부품번호상세설명 및 기능제조사
LS7560

BRUSHLESS DC MOTOR CONTROLLER

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LS7560N

BRUSHLESS DC MOTOR CONTROLLER

LSI Computer Systems
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