A USB power delivery (USB-PD) adapter provides an input voltage range of 5V to 20V. The board is designed to support applications beyond 20V (e.g., a portable printer motor that is 24V and 32V). The buck-boost converter included in this design will work as a turbo boost USB-PD to deliver the desired higher voltage. Renesas’ USB power delivery controller is based on the Universal Serial Bus (USB) Power Delivery Specification revision 3.0 and USB Type-C™ Cable and Connector Specification revision 1.3. ​

System Benefits:

  • The ISL81401 is a 4-switch synchronous buck-boost controller with peak and average current sensing and monitoring at both ends. It provides the turbo boost function to increase the USB-PD voltage. In this design, it reaches as high as 32V, which can deliver up to 45W of maximum power. ​
  • The ISL9238C is a buck-boost narrow output voltage DC (NVDC) charger. It charges 2 to 4-cell Li-ion batteries and supports kick-start applications where inrush current becomes critical during power up. The supplementary battery can help avoid system collapse due to inadequate power from the USB-PD.



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Template 1 Sheet.90 Connector Arrow Connector Arrow.18 Connector Arrow.19 Connector Arrow.20 Connector double arrow Battery.27 Sheet.27 Sheet.28 Sheet.29 2-4 Cells 2-4 Cells 2-4 Cells 9-15V 9-15V 9-15V 5-20V 5-20V 5-20V 5-20V.33 5-20V 5-20V 5-20V.34 5-20V 5-20V Board.317 LCD Module/OLED LCD/LED Segment Display Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.41 Sheet.42 Sheet.43 Sheet.44 Sheet.45 Sheet.46 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Sheet.56 Sheet.57 Sheet.58 Sheet.59 Sheet.60 Sheet.61 Sheet.62 Sheet.63 Sheet.64 Sheet.65 Sheet.66 ON ON Sheet.67 OFF OFF Sheet.68 Sheet.69 Sheet.70 Sheet.71 Sheet.72 Sheet.73 Sheet.74 Sheet.75 LCD Module 5-20V.76 LCD Module/OLED LCD Module/OLED Connector Arrow.80 Connector Arrow.81 Connector Arrow.82 MCU EP Multi-function block MCU MCU Peripheral I2C I2C Peripheral.14 PWM I/O PWM I/O Peripheral.15 Serial Bus I/O Serial Bus I/O USB PD Controller USB PD Controller USB PD Controller Buck-Boost NVDC Charger Buck-Boost NVDC Charger Buck-BoostNVDC Charger Buck Regulator Buck Regulator Buck Regulator Op Amp Op Amp Op Amp Buck-Boost Controller Buck-Boost Controller Buck-Boost Controller Type-C Type-C Type-C Connector Arrow.84 3.3V 3.3V 3.3V Type-C.91 Load Load Connector Arrow.93 32V/45W (Adjustable) 32V/45W (Adjustable) 32V/45W (Adjustable) AS104 AS104 AS104
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