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    LCPWM Con Opamens

    Uploaded by

    David A. D'Lima
    This circuit diagram shows an interface for controlling an inverter using pulse-width modulation (PWM). It uses an LM324 operational amplifier chip to condition the PWM output signal to match the input requirements of various inverter models. Resistor values and the power supply voltage can be adjusted to suit different inverters. The circuit provides a PWM frequency of 160Hz and scales the control voltage input to match the rated input range of the targeted inverter.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    LCPWM Con Opamens

    Uploaded by

    David A. D'Lima
    28 views1 page
    This circuit diagram shows an interface for controlling an inverter using pulse-width modulation (PWM). It uses an LM324 operational amplifier chip to condition the PWM output signal to match the input requirements of various inverter models. Resistor values and the power supply voltage can be adjusted to suit different inverters. The circuit provides a PWM frequency of 160Hz and scales the control voltage input to match the rated input range of the targeted inverter.

    Original Description:

    pwm con opamnes

    Original Title

    Lcpwm Con Opamens

    Copyright

    © © All Rights Reserved

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    This circuit diagram shows an interface for controlling an inverter using pulse-width modulation (PWM). It uses an LM324 operational amplifier chip to condition the PWM output signal to match the input requirements of various inverter models. Resistor values and the power supply voltage can be adjusted to suit different inverters. The circuit provides a PWM frequency of 160Hz and scales the control voltage input to match the rated input range of the targeted inverter.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    28 views1 page

    LCPWM Con Opamens

    Uploaded by

    David A. D'Lima
    This circuit diagram shows an interface for controlling an inverter using pulse-width modulation (PWM). It uses an LM324 operational amplifier chip to condition the PWM output signal to match the input requirements of various inverter models. Resistor values and the power supply voltage can be adjusted to suit different inverters. The circuit provides a PWM frequency of 160Hz and scales the control voltage input to match the rated input range of the targeted inverter.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 1

    4

    R1
    10.0K 1%

    GND

    PWM Out
    4

    U1D
    LM324

    R9
    4.7K

    VS

    12 +
    R11
    DNP

    R4
    20K

    Q1
    MMBT3904

    14

    13 -

    GND
    11

    11

    VCC

    2 -

    GND

    R6
    10K

    VS

    3 +

    GND

    R7
    10K

    VS

    5 +
    6

    U1A
    LM324

    R4 may not be
    required. Refer
    to inverter data
    sheet to determine
    if pull-up is required
    on Enable or
    Disable pin.

    R5
    DNP

    VCC

    11

    9 R10
    10K

    R8
    10K

    VS

    10 +

    VCC

    11

    VCC

    U1B
    LM324

    VCC

    U1C
    LM324

    VCC
    4

    R2
    18K

    C1
    0.33u

    R3
    22.1K 1%

    R12
    10K

    R13
    10K
    R14
    DNP

    Control Votage In

    This interface circuit is required


    to interface to the 8M, L, S,
    E200C, and K series of inverters.
    This may also be required for
    other series of inverters, refer
    to the data sheet for more
    information.

    PWM Characterisitcs (typical):

    VCC

    R17

    Q2
    MMBT3906

    5V
    3.3K
    1.5K

    12V
    3.3K
    2.2K

    Control
    VCC
    5V
    12V
    24V

    R18 is only required for


    E200C inverters, refer
    to data sheet for proper
    value and power rating.

    Voltage Input Range:


    Min
    Max
    0.3V 4.7V
    1.1V 10.2V
    1.1V 22.2V

    For 5V operation, the LMV324


    must be used for U1 in place
    of the standard LM324.

    R18

    24V
    10K
    8.2K

    D1
    1N4148

    Endicott Research Group, Inc.

    D1 is optional, but recommended.


    In some cases, the presence of
    D1 may prevent the inverter from
    turning off completely. If this occurs,
    omit D1.

    Title
    Size
    A
    Date:

    This circuit is provided for


    reference only. You should
    refer to the data sheet(s)
    of the recommended
    components to determine
    if they will work properly in
    your application.

    To Control Pin

    Component Values:
    VCC
    R16
    R17

    DNP - (Do Not Populate)


    All resistors 5% unless otherwise
    specified. Be sure to check
    power levels in components
    before picking package size.
    Dissipated power in each resistor
    is usually less than 1/8 watt.

    Frequency: 160 Hz

    R16

    From PWM Out

    R15
    DNP

    To change polarity of the PWM,


    swap R5 with R6 and R11 with
    R12. R14 and R15 are used to
    change the range of PWM
    operation. If full Control Voltage
    range is required R14 and R15
    are not required. R14 and R15
    can be used to adjust the dimming
    range.

    JM 4/18/2002

    Reference PWM Design


    Document Number
    None
    Thursday, April 18, 2002
    2

    R ev
    0
    Sheet

    of
    1

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