MSK4370HD 查看數據表（PDF） - M.S. Kennedy
零件编号
产品描述 (功能)
生产厂家
MSK4370HD Datasheet PDF : 8 Pages
| |||
APPLICATION NOTES
MSK4370 PIN DESCRIPTIONS
AV+, BV+, CV+ - are the power connections from the hybrid to the
bus. The pins for each phase are brought out separately and must
be connected together to the V+ source externally. The external
wiring to these pins should be sized according to the RMS current
required by the motor. These pins should be bypassed by a high
quality monolithic ceramic capacitor for high frequencies and enough
bulk capacitance for keeping the V+ supply from drooping.
AØ, BØ & CØ - are the connections to the motor phase windings
from the bridge output. The wiring to these pins should be sized
according to the current required by the motor. There are no short
circuit provisions for these outputs. Shorts to V+ or ground from
these pins must be avoided or the bridge will be destroyed.
AVS, BVS, CVS - are the return pins on the bottom of each half
bridge. They are brought out separately and should be connected
together externally to allow the current from each half bridge to flow
through the sense resistor. The wiring on these pins should be sized
according to the current requirements of the motor.
RTN - is the power return connection from the module to the bus.
All ground returns connect to this point from internal to the mod-
ule in a star fashion. All external ground connections to this point
should also be made in a similar fashion. The V+ capacitors should
be returned to this pin as close as possible. Wire sizing to this pin
connection should be made according to the required current.
LGND - is an isolated ground connection to the RTN pin of the
hybrid that is connected internally. For any circuitry that needs to
be connected to the RTN pin without the influence of current flow
through RTN should be connected at this point.
GND - is a ground pin that connects to the ground plane for all low
powered circuitry inside the hybrid.
+15 VIN - is the input for applying +15 volts to run the low power
section of the hybrid. This pin should be bypassed with a 10 µF
capacitor and a 0.1 µF capacitor as close to this pin as possible.
-15 VIN - is the input for applying -15 volts to run the low power
section of the hybrid. This pin should be bypassed with a 10 µF
capacitor and a 0.1 µF capacitor as close to this pin as possible.
CURRENT COMMAND (+,-) - are differential inputs for controlling
the module in current mode. Scaled at ±1 amp per volt of input
command, the bipolar input allows both forward and reverse current
control capability regardless of motor commutation direction. The
maximum operational command voltage should be ±10 volts for
±10 amps of motor current.
CURRENT MONITOR - is a pin providing a current viewing signal
for external monitoring purposes. This is scaled at ±1 amp of motor
current per volt output, up to a maximum of ±10 volts, or ±10 amps.
As ±10 amps is exceeded, the peaks of the waveform may become
clipped as the rails of the amplifiers are reached. This voltage is
typically ±12.5 volts, equating to ±12.5 amps of current peaks.In
DIS mode, the CURRENT MONITOR output may rail positive or
negative, depending on internal bias currents.When re-enabled,
this output will resume expected operation.
E/A OUT - is the current loop error amp output connection. It is
brought out for allowing various loop compensation circuits to be
connected between this and E/A-.
E/A- - is the current loop error amp inverting input connection. It is
brought out for allowing various loop compensation circuits to be
connected between this and E/A OUT.
CLOCK SYNC - is an input for synchronizing to an external clock.
The sync circuit will trigger on the edges of the applied clock and
effectively shorten the period of the internal oscillator on each cycle.
The frequency can be increased from a free running 14 KHz to 20
KHz maximum. The clock applied shall be 15 volts amplitude with
at least a 10% duty cycle.
REFOUT - is a 6.25 volt regulated output to be used for powering
the hall devices in various motors. Up to 15 mA of output current
is available.
HALL A, B & C - are the hall input pins from the hall devices in the
motor. These pins are internally pulled up to 6.25 volts. The halls
can reflect a 120/240 degree commutation scheme or a 60/300
degree scheme.
BRAKE - is a pin for commanding the output bridge into a motor
BRAKE mode. When pulled low, normal operation commences.
When pulled high, the 3 high side bridge switches turn off and the
3 low side bridge switches turn on, causing rapid deceleration of the
motor and will cease motor operation until pulled high again. Logic
levels for this input are TTL compatible. It is necessary to toggle
ON and OFF BRAKE after power up before normal operation can
begin. This is necessary because of the bootstrap high-side power
supplies for each phase. These are not continuous high-side sup-
IN plies and need to be refreshed by turning on the low side switches
momentarily with the BRAKE. It is internally pulled high.
DIS - is a pin for externally disabling the output bridge. A 15V CMOS
logic low will disable the bridge and a 15V CMOS logic high will
enable it. After using the DIS pin, the BRAKE must be cycled ON
and OFF before normal operation will begin. This is due to the
bootstrap high-side supplies needing refreshing.
60/120 - is a pin fpr selecting the orientation of the commutation
sheme of the motor. A high state will produce 60/300 degree
commutation, whereas a low state will produce 120/240 degree
commutation. Logic levels for this input are TTL compatible. It is
internally pulled high.
ILIMIT ADJUST - is a pin for externally adjusting the current limit
point. By placing a resistor to ground from this pin, a voltage divider
is created and the current limit will be lowered. Without an external
resistor, the current limit is set at 13 Amps.
3
8548-24 Rev. L 1/15
Share Link: 