GRob
- 16th December 2004, 14:24
Hi
I have an application where I want to dim 4 LED circuits (all at different intensities and continually changing) using PWM. The two options I am looking at as a micro have a maximum of two HPWM outputs, so I am looking for a chip that will talk I2C and drive 2 or 4 PWM outputs. I have located the Philips PCA9530 but it seems hard to come by in small quantities, likewise with a Mitsubishi/Renesas M66242. Any ideas? I could go down the line of a I2C DAC and then a seperate Analogue driven PWM but it seems a roundabout way to do it.
Cheers
Grant
I have an application where I want to dim 4 LED circuits (all at different intensities and continually changing) using PWM. The two options I am looking at as a micro have a maximum of two HPWM outputs, so I am looking for a chip that will talk I2C and drive 2 or 4 PWM outputs. I have located the Philips PCA9530 but it seems hard to come by in small quantities, likewise with a Mitsubishi/Renesas M66242. Any ideas? I could go down the line of a I2C DAC and then a seperate Analogue driven PWM but it seems a roundabout way to do it.
Cheers
Grant