Comments on Control circuit for Power Converters
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Control circuit for Power Converters
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There is always a mixed response when comparing power management ICs (PMIC) and microcontrollers in the application of power converters (I mean as pwm controllers). What are the advantages and disadvantages of each? What high level requirements are relevant in deciding which is more appropriate in a particular instance?
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These are my general thoughts: -
- Easiest - power management IC (PMIC)
- Smallest footprint - PMIC usually
- Cheapest - usually PMIC (for a certain minimum performance level)
- Highest performance - PMIC will outshine all others
- Best reliability - PMIC
- Best stability - PMIC
- Quickest reaction time to load changes - PMIC
- Quickest reaction time to incoming voltage changes - PMIC
- Least start-up overshoot - PMIC (especially boost converters)
And now the bad things: -
- Unreliability - microcontroller
- Instability - microcontroller
- Noisiest - microcontroller
- Poor reaction time to load changes - microcontroller
- Poor reaction time to input voltage changes - microcontroller
which one is better in the long run and also how to mitigate its drawbacks?
Use the better one - if the better one still has drawbacks then extra circuitry may be required to overcome limitations but, without a specific application/job in mind this cannot be answered.
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