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Secondary Side Switch-Mode Power Supply Control Slide 18

This slide introduces the SEA01 CV/CC controller with a digital trimming feature. This reduces labor costs because a person is not required to manually adjust trim pots or change resistors to set the CV/CC parameters. The SEA01 enables automated on-line digital trimming for high-end product accuracy. This requires five bits of trimming for Vref for the voltage and five bits of trimming Vref for the current. The Vref for the voltage is 2.5 V with 0.2% trimming per step and Vref for the current is 30 mV with 3.3% trimming steps. The user can trim it twice, as it has a redundant one-time programmable memory, with simpler, robust trimming protocols and storage. Also, it has 20 mA sourcing capability for Iout1 and 2. For Iref it features a wide operating voltage range, 3.5 to 36 V, and a low quiescent current consumption of 200 µA.

PTM Published on: 2015-04-06