2 PWM Dead-Band Control - Electronic Circuits Projects Diagrams Free

skyflyer54 · 13th August 2008, 05:43 AM

Hi,

May I know is there anyone come across microchip PIC MCU which have 2 pwm dead band control?

Currently i'm using PIC18F4520, PICF4620, PICF4550 which all only have 1 pwm dead band control which is on Half-bridge output mode.

Please advise. Thanks.

Sceadwian · 16th August 2008, 03:03 AM

I don't know if you're set on PICS but you may want to look into the tiny26 chips from Atmel. They have 2 high speed PWM outputs that do not overlap (Which is what I think you're looking for) They have other chip lines that have multiple PWM outputs with adjustable deadband that you may want to look into, though I can't recommend the exact parts off the top of my head. You may want to consider using a single MCU as a multi phase clock generator for slave MCUs that actually generate the PWMs. Many times using a couple of simpler chips and coordinating their clocks will give you the same results at less cost.

skyflyer54 · 17th August 2008, 05:43 PM

Quote:

Originally Posted by Sceadwian

I don't know if you're set on PICS but you may want to look into the tiny26 chips from Atmel. They have 2 high speed PWM outputs that do not overlap (Which is what I think you're looking for) They have other chip lines that have multiple PWM outputs with adjustable deadband that you may want to look into, though I can't recommend the exact parts off the top of my head. You may want to consider using a single MCU as a multi phase clock generator for slave MCUs that actually generate the PWMs. Many times using a couple of simpler chips and coordinating their clocks will give you the same results at less cost.

Thanks Sceadwian...
I need to use microchip PIC chip as i was only provided with microchip development kit. Anyway, thanks for your recommendation.

Sceadwian · 17th August 2008, 06:11 PM

Still, you could use a second chip as a slave to the first. I'm going to hazzard a guess they have an I2C or SPI interface.

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13th August 2008, 05:43 AM	(permalink)
skyflyer54	2 PWM Dead-Band Control Hi, May I know is there anyone come across microchip PIC MCU which have 2 pwm dead band control? Currently i'm using PIC18F4520, PICF4620, PICF4550 which all only have 1 pwm dead band control which is on Half-bridge output mode. Please advise. Thanks.

16th August 2008, 03:03 AM	(permalink)
Sceadwian	I don't know if you're set on PICS but you may want to look into the tiny26 chips from Atmel. They have 2 high speed PWM outputs that do not overlap (Which is what I think you're looking for) They have other chip lines that have multiple PWM outputs with adjustable deadband that you may want to look into, though I can't recommend the exact parts off the top of my head. You may want to consider using a single MCU as a multi phase clock generator for slave MCUs that actually generate the PWMs. Many times using a couple of simpler chips and coordinating their clocks will give you the same results at less cost. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."

17th August 2008, 06:11 PM	(permalink)
Sceadwian	Still, you could use a second chip as a slave to the first. I'm going to hazzard a guess they have an I2C or SPI interface. __________________ "Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat, and no cat anywhere ever gave anyone a straight answer, har har."