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参数资料
| 型号： | OM9369SF |
| 厂商： | International Rectifier |
| 英文描述： | FULL-FEATURED POWER MODULE FOR HIGH VOLTAGE DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| 中文描述： | 全功能功率模块高压直接驱动三相无刷直流电动机 |
| 文件页数： | 6/10页 |
| 文件大小： | 121K |
| 代理商： | OM9369SF |
output clears the internal PWM latch, which in turn
commands the Phase Outputs to chop. For voltage-
mode control systems, pin 10 may be connected to the
Oscillator Timing Input, pin 11.
OSCILLATOR TIMING INPUT (Pin 11)
-- The Oscillator
Timing Input sets a fixed PWM chopping frequency by
means of an internal resistor (Rosc), whose value is set
to 75k
, connected from pin 11 to the +5V Reference
Output, and an internal capacitor (Cosc), whose value
is 1800pF, connected from pin 11 to Ground. In custom
applications, the recommended range of values for
Rosc is 10k
to 100k
, and for Cosc is 0.001uF to
0.01uF, and the maximum operating frequency should
be kept below 20kHz. The approximate oscillator
frequency is:
2
fo = (Rosc x Cosc)
[Hz]
The voltage waveform on pin 11 is a ramp whose
magnitude is approximately 1.2Vp-p, centered at
approximately 1.6Vdc. In addition to the voltage-mode
PWM control, pin 11 may be used for slope
compensation in current-mode control applications.
ISENSE (Pin 12)
-- This pin is connected to the output
of the internal current-sense amplifier. It drives a peak-
current (cycle-by-cycle) comparator which controls
Phase Output chopping, and a fail-safe current
comparator which, in the event of an output overcurrent
condition, activates the soft-start feature and disables
the Phase Outputs until the overcurrent condition is
removed. The magnitude of the voltage appearing at pin
12 is dependent upon the voltages present at the
current-sense amplifier inputs, ISH and ISL:
V(Isense) = 2.5V + [2 x ABS (ISH - ISL)] [Volts]
CURRENT SENSE INPUTS (ISH, Pin 13; ISL, pin 14)
-- These inputs to the current-sense amplifier are
interchangeable and they can be used as differential
inputs. The differential voltage applied between pins 13
and 14 should be kept below +/-0.5Vdc to avoid
saturation.
QUAD SELECT INPUT (Pin 15)
-- This input is used to
set the OM9369CM in a half control or full control
chopping regime. When driven with a logic low level, the
OM9369CM is in the half control mode, whereby only
the three lower (pull-down) power switches associated
with the Phase Outputs are allowed to chop. Alternately,
when driven with a logic high level, the OM9369CM is in
the full control mode, where all six power switches (pull-
up and pull-down) associated with the Phase Outputs
are chopped by the PWM. During motor braking,
changing the logic state of the Quad Select Input has no
effect on the operation of the OM9369CM.
PIN DESCRIPTIONS / FUNCTIONALITY
VCC (Pin 1)
-- The Vcc Supply input provides bias
voltage to all of the internal control electronics within
the OM9369CM, and should be connected to a
nominal +15Vdc power source. High frequency
bypass capacitors (10uF polarized in parallel with
0.1uF ceramic are recommended) should be
connected as close as possible to pin 1 and Ground
(pin 20).
DELAY (Pin 2)
-- This pin must be connected to the
Brake/Tach Timing Input pin (pin 17) to ensure that
the high-side bootstrap capacitors are charged
during initial startup.
ERROR AMPLIFIER (EA1- Input, Pin 3; EA1+
Input, Pin 5; EA1 Output, Pin 9)
-- The Error
Amplifier is an uncommitted LM158-type operational
amplifier, providing the user with many external
control loop compensation options. This amplifier is
compensated for unity gain stability, so it can be
used as a unity gain input buffer to the internal PWM
comparator when pin 3 is connected to pin 9. The
output of the Error Amplifier is internally connected
to the PWM comparator's "-" input, simplifying
external layout connections.
+5V REFERENCE OUTPUT (Pin 6)
-- This output
provides a temperature-compensated, regulated
voltage reference for critical external loads. It is
recommended that this pin be used to power the
external Hall-effect motor position sensors. By
design, the +5V reference must be in regulation
before the remainder of the control circuitry is
activated. This feature allows the Hall-effect sensors
to become powered and enabled before any Phase
Output is enabled in the OM9369CM, preventing
damage at turn-on. High-frequency bypass
capacitors (10uF polarized in parallel with 0.1uF
ceramic are recommended) should be connected as
close as possible to pin 5 and Ground (pin 20).
SPARE AMPLIFIER (EA2- Input, Pin 7; EA2+
Input, Pin 4; EA2 Output, Pin 8)
-- The Spare
Amplifier is an uncommitted LM158-type operational
amplifier, and in addition to the internal error
amplifier, provides the user with additional external
control loop compensation options. This amplifier is
also compensated for unity gain stability and it can
be used as a unity gain input buffer when pin 7 is
connected to pin 8. If the Spare Amplifier is unused,
pin 4 should be connected to Ground, and pin 7
should be connected to pin 8.
PWM INPUT (Pin 10)
-- This pin is connected to the
"+" input of the internal PWM comparator. The PWM
2.1 - 6
OM9369CM
相关PDF资料 |
PDF描述 |
|---|---|
| OM9369SP | FULL-FEATURED POWER MODULE FOR HIGH VOLTAGE DIRECT DRIVE OF 3-PHASE BRUSHLESS DC MOTOR |
| OM9370SP | Industrial Control IC |
| OM9371RF | Industrial Control IC |
| OM9371SF | Industrial Control IC |
| OM9372RF | Industrial Control IC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| OM9369SP | 制造商:International Rectifier 功能描述: |
| OM9370SP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| OM9371 | 制造商:IRF 制造商全称:International Rectifier 功能描述:25 Amp. Push-Pull 3-Phase Brushless DC Motor Controller/Driver Module in a Power Flatpack |
| OM9371RF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
| OM9371SF | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Industrial Control IC |
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