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参数资料
| 型号： | MSK4211 |
| 厂商： | MS KENNEDY CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 14 A, UFM18 |
| 文件页数： | 3/5页 |
| 文件大小： | 385K |
| 代理商： | MSK4211 |
APPLICATION NOTES
IN
This is a diagram of a typical application of the MSK 4211.
The design Vcc voltage is +12 volts and should have a good
low ESR bypass capacitor such as a tantalum electrolytic.
The analog input can be an analog speed control voltage from
a potentiometer, other analog circuitry or by microprocessor
and a D/A converter. This analog input gets pulled by the
current control circuitry in the proper direction to reduce the
current flow in the bridge if it gets too high. The gain of the
current control amplifier will have to be set to obtain the
proper amount of current limiting required by the system.
Current sensing is done in this case by a 0.1 ohm sense
resistor to sense current from both legs of the bridge sepa-
rately. It is important to make the high current traces as big
as possible to keep inductance down. The storage capacitor
connected to the V+ and the hybrid should be large enough
to provide the high energy pulse without the voltage sagging
too far. A low ESR ceramic capacitor or large polypropylene
capacitor will be required. Mount capacitor as close to hy-
brid as possible. The connection between GND and the V+
return should not be carrying any motor current. The sense
resistor signal is common mode filtered as necessary to feed
the limiting circuitry for the microprocessor. This application
will allow full four quadrant torque control for a closed loop
servo system.
A snubber network is usually required, due to the induc-
tance in the power loop. It is important to design the snub-
ber network to suppress any positive spikes above 75V and
negative spikes below -2V with respect to ground.
TYPICAL SYSTEM OPERATION
VREF IN - Is a pin provided to allow the user to tailor
the INPUT threshold to their particular logic level re-
quirements. In a default configuration, VREF IN gets
connected to VREF OUT for TTL threshold level require-
ments.
VREF OUT - Is a pin providing a resistor divider net-
work dividing Vcc voltage down to be used as a de-
fault reference level input for the INPUT signal thresh-
old. It is set up primarily to be used as a TTL threshold.
To use, just connect VREF OUT to VREF IN. VREF
OUT is bypassed internally with a capacitor.
MSK 4211 PIN DESCRIPTIONS
HEN - Is the connection for enabling the high side out-
put switches. When taken low, HEN overrides other
inputs and the high side switches remain off. When
HEN is high everything functions normally. An internal
pullup to Vcc will keep HEN high if left unconnected.
DISABLE - Is the connection for disabling all 4 output
switches. DISABLE high overrides all other inputs.
When taken low, everything functions normally. An
internal pullup to Vcc will keep DISABLE high if left
unconnected.
INPUT - Is an analog input for controlling the PWM
pulse width of the bridge. A voltage higher than Vcc/2
will produce greater than 50% duty cycle pulses out of
OUTPUT A. A voltage lower than Vcc/2 will produce
greater than 50% duty cycle pulses out of OUTPUT B.
GND - Is the return connection for the input logic and
Vcc.
RSENSE B - Is the connection for the bottom of the B
half bridge. This can have a sense resistor connection
to the V+ return ground for current limit sensing, or
can be connected directly to ground. The maximum
voltage on this pin is ±2 volts with respect to GND.
RSENSE A - Is the connection for the bottom of the A
half bridge. This can have a sense resistor connection
to the V+ return ground for current limit sensing, or
can be connected directly to ground. The maximum
voltage on this pin is ±2 volts with respect to GND.
OUTPUT B - Is the output pin for the other half of the
bridge. Decreasing the input voltage causes increasing
duty cycles at this output.
OUTPUT A - Is the output pin for one half of the bridge.
Increasing the input voltage causes increasing duty
cycles at this output.
V+ - Is the higher voltage H-bridge supply. The
MOSFETS obtain the drive current from this supply pin.
The voltage on this pin is limited by the drive IC. The
MOSFETS are rated at 100 volts. Proper by-passing to
GND with sufficient capacitance to suppress any volt-
age transients, and to ensure removing any drooping
during switching, should be done as close to the pins
on the hybrid as possible.
VCC - Is the low voltage supply for powering internal
logic and drivers for the lowside and highside MOSFETS.
The supplies for the highside drivers are derived from
this voltage.
PRELIMINARY Rev. A 6/00
3
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相关代理商/技术参数 |
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| MSK4220 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:75 VOLT 8 AMP MOSFET H-BRIDGE PWM MOTOR DRIVER/AMPLIFIER |
| MSK4221 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:75 VOLT 8 AMP MOSFET H-BRIDGE PWM MOTOR DRIVER/AMPLIFIER |
| MSK4222 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:75 VOLT 8 AMP MOSFET H-BRIDGE PWM MOTOR DRIVER/AMPLIFIER |
| MSK4223 | 制造商:MSK 制造商全称:M.S. Kennedy Corporation 功能描述:75 VOLT 6 AMP MOSFET H-BRIDGE PWM MOTOR DRIVER/AMPLIFIER |
| MSK4223D | 制造商:MSK 制造商全称:M.S. Kennedy Corporation 功能描述:75 VOLT 6 AMP MOSFET H-BRIDGE PWM MOTOR DRIVER/AMPLIFIER |
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