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STEVAL-ISA161V1：Evaluation board for the SEA01 constant voltage and current controller with online digital trimming

The STEVAL-ISA161V1 is an evaluation board to test the performance of the SEA01 constant voltage and current controller with online digital trimming from STMicroelectronics. The board implements a 65 W adapter, targeting applications such as power supplies for high-end portable computers. The board uses the SEA01 as secondary side CV/CC controller, allowing the application to satisfy very precise output voltage and current regulations thanks to the digital trimming technique employed. The primary side PWM controller is the L6566B. This device drives a TM flyback topology, the best fit for this type of application.

The SEA01 is mounted on a small daughterboard that includes a connector to communicate, via I²C protocol, with an external trimming tool. This evaluation board can therefore be useful also as a means to test the benefits of digital trimming in a real application. The SEA01, housed in an SO8 package, is a CV/CC controller which includes 2 transconductance op-amps and 2 voltage references, digitally trimmable using an I²C interface. ST also offers an advanced trimming board (STEVAL-PCC019V1) that allows users to perform all the trimming operations (including automatic trimming) using a standard Windows^®-based PC.

Key Features

• Universal input mains range: 90 to 264 Vac, 45 to 66 Hz
• 65 W continuous output power
• Precise output levels:
  • CV: 19 V ± 0.1%
  • CC: 3.75 A ± 1.67%
• No load consumption < 100 mW @ 230 Vac
• Average efficiency > 89%
• Full set of protection features
• EMI: in accordance with EN55022 - class B
• Safety: in accordance with EN60950
• PCB: CEM-1, single side 35 µm
• Board size: 58 x 121 mm, 25 mm height
• RoHS compliant

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