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Pulse-width modulation

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nidhi singh
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nidhi singh
Asked: September 15, 2023In:
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Hello, Not sure that the product I am looking for exists. It should behave like an LED driver but after looking through different LEDs I did not find a product that meets my needs.Can drive 1…. 15 LEDs connected in series Have ...Read more

Hello,

Not sure that the product I am looking for exists. It should behave like an LED driver but after looking through different LEDs I did not find a product that meets my needs.

  • Can drive 1…. 15 LEDs connected in series
  • Have a possibility to change current through LEDs (not by PWM!)
  • Have the possibility to switch ON/ OFF LEDs rapidly. to ensure bitrate 200kb/ sec

Does such a product exist?

Thanks.

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driverledpwmseries
  1. Alex thomas

    Hello, Right, existing LED drivers all have PWM engines. It depends on the LED, some have Vf = 1.8, and some have 3.5V. So, 15x3.5 = 52.5 V in direct mode. Also current, 20 mA or more? For low current low voltage OPA may be an option, or OPA buffered by transistor for high CV. Thank You

    Hello,

    Right, existing LED drivers all have PWM engines.

    It depends on the LED, some have Vf = 1.8, and some have 3.5V. So, 15×3.5 = 52.5 V in direct mode. Also current, 20 mA or more?

    For low current low voltage OPA may be an option, or OPA buffered by transistor for high CV.

    Thank You

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vikas Nagpal
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vikas Nagpal
Asked: September 11, 2023In:
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Hello, Three accompanied PWM waveforms Is there a recommended way of producing three accompanied PWM waveforms on an RA4M1? Two is easy with the two outputs from one counter, but how about three? Should I start two counters together, and hope for the ...Read more

Hello,

Three accompanied PWM waveforms

Is there a recommended way of producing three accompanied PWM waveforms on an RA4M1?
Two is easy with the two outputs from one counter, but how about three?

Should I start two counters together, and hope for the best?
Should I set one to count to a higher figure, and also use the second one to reset the first?

Thank You

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mcumicrocontrollerpwmra4m1renesaswaveforms
  1. Julian White

    Hello @Vikas, Thanks for posting your question online. Yes, one way to have multiple synchronized PWM waveforms is to start multiple counters at the same time, as you can see in the screenshot below Regards, Julian White

    Hello vikas Nagpal,

    Thanks for posting your question online.

    Yes, one way to have multiple synchronized PWM waveforms is to start multiple counters at the same time, as you can see in the screenshot below

    Regards,
    Julian White

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vikas Nagpal
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vikas Nagpal
Asked: July 18, 2023In:
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Hi Team, We’re looking for an automotive high-side switch with the below features. 1. VSS- 18V, Load current- 2A, PWM- 5KHz, No of channels- 2 Then we’re unable to get PWM support for devices. Please help us to get the device that’s available ...Read more

Hi Team,

We’re looking for an automotive high-side switch with the below features.

1. VSS- 18V, Load current- 2A, PWM- 5KHz, No of channels- 2

Then we’re unable to get PWM support for devices. Please help us to get the device that’s available with a maximum PWM frequency.

Thank You

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channelsdevicesfrequencyInfineonpwm
  1. ellasmith

    Hello, This series of products are designed for the one-time switch, so it is used for low frequency, if PWM is applied, we would recommend using lower than 300Hz, or for parts even <100Hz, you may relate to the ton/toff time of the part for details. Thank You

    Hello,

    This series of products are designed for the one-time switch, so it is used for low frequency, if PWM is applied, we would recommend using lower than 300Hz, or for parts even <100Hz, you may relate to the ton/toff time of the part for details.

    Thank You

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Linto
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Linto
Asked: July 27, 2022In:
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I am working with PWM complementary on Renesas RA2L1 , please help to share example code for this.

I am working with PWM complementary on Renesas RA2L1 , please help to share example code for this.

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pwmPWM Complementary coderenesas ra2l1
  1. Shivali Singh

    Hi, Please find the below step of working PWM Complementary code.   void hal_entry(void) { /* TODO: add your own code here */ R_GPT_Open(&g_timer0_ctrl, &g_timer0_cfg); R_GPT_DutyCycleSet(&g_timer0_ctrl, 120 , GPT_IO_PIN_GTIOCB); R_GPT_DutyCycleSet(&g_timer0_ctrl, (240-120), GPTRead more

    Hi, Please find the below step of working PWM Complementary code.

     

    void hal_entry(void)
    {
    /* TODO: add your own code here */
    R_GPT_Open(&g_timer0_ctrl, &g_timer0_cfg);
    R_GPT_DutyCycleSet(&g_timer0_ctrl, 120 , GPT_IO_PIN_GTIOCB);
    R_GPT_DutyCycleSet(&g_timer0_ctrl, (240-120), GPT_IO_PIN_GTIOCA);

    //R_GPT_PwmOutputDelayInitialize();
    R_GPT_Enable(&g_timer0_ctrl);
    R_GPT_Start(&g_timer0_ctrl);
    while(1)
    {

    }

     

     

    Thanks

    Shivali

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Rutuja
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Rutuja
Asked: June 22, 2022In:
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I am using EK-RA2E1 board and I want to drive a DC Motor with L293N Motor Driver with PWM. Is there any source that can help with this problem?

I am using EK-RA2E1 board and I want to drive a DC Motor with L293N Motor Driver with PWM. Is there any source that can help with this problem?

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dc motor drivedc-motorEK-RA2E1MOTOR DRIVEpwm
  1. pallavi sharma

    As the DC motor is the simple one, it doesn't require any tricks to control. You just configure two PWM channels (or a single channel but with switchable outputs).

    As the DC motor is the simple one, it doesn’t require any tricks to control. You just configure two PWM channels (or a single channel but with switchable outputs).

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pallavi sharma
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pallavi sharma
Asked: June 16, 2022In:
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While using RA2L1AB3CFL processor. I want to produce PWM and Counter at the same time on this processor. I need to both keep time and create PWM. In the FSP configuration section, the PWM and counter settings are different. So ...Read more

While using RA2L1AB3CFL processor. I want to produce PWM and Counter at the same time on this processor. I need to both keep time and create PWM. In the FSP configuration section, the PWM and counter settings are different. So I open two of the r_gpt stacks. Although I open it, I cannot set it in different properties. Can anyone help me how can I do this? PWM and counter need to run continuously. Unfortunately, it is not open and closed.

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counterpwmRA2L1AB3CFL processorRenesas Microcontroller
Anonymous
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Anonymous
Asked: May 16, 2022In:
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Any reference circuit for a cost effective digital converter to analog converter ? input 0-3 V DC PWM input, output 0-10 V DC.

Any reference circuit for a cost effective digital converter to analog converter ? input 0-3 V DC PWM input, output 0-10 V DC.

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analog convertercircuitDigital converterpwm
  1. Support

    Hi , Have you checked Renesas RA MCU for DAC , this MCU having inbulit DAC with 16 bit SAR ADC     RA2A1 - 32-bit Microcontrollers with 48MHz Arm® Cortex®-M23 and Integration of 24-bit Sigma-Delta ADC | Renesas

    Hi , Have you checked Renesas RA MCU for DAC , this MCU having inbulit DAC with 16 bit SAR ADC

     

     

    RA2A1 – 32-bit Microcontrollers with 48MHz Arm® Cortex®-M23 and Integration of 24-bit Sigma-Delta ADC | Renesas

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