Universal AC Input, 5V@2.1A Smart USB Charger Cube
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This reference design uses the UCC28700 in a quasi-resonant flyback to generate an isolated 5V at up to 2.1A. The UCC28700 implements primary-side regulation, eliminating the need for an opto-coupler and reducing the total component count. This results in a compact and cost effective design. The populated circuit boards in this design occupy the space of a 1" by 1" by 1" cube. The TPS2511 USB power switch also offers the data line control to charge most smart phones and tablets. The energy saving features of the UCC28700 allow this design to consume less than 30mW when plugged into the wall with no device attached to the USB port.

See the Important Notice and Disclaimer covering reference designs and other TI resources.

(Output Voltage 1)
Vin (Min) (V)85
Vin (Max) (V)265
Vout (Nom) (V)5
Iout (Max) (A)2.1
Output Power (W)10.5
Input TypeAC
TopologyFlyback- Quasi Resonant
Flyback- DCM

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS2511  USB dedicated charging port controller and 2.2A power switch  Power management  Sample & Buy View Design Kits & Evaluation Modules
UCC28700  Constant-voltage, constant-current PWM with PSR & Programmable cable compensation  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS2511 Download Download
UCC28700 Download Download

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Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 2171 27 Jun 2012
Design files (8)
Title Type Size (KB) Date
PDF 107 27 Jun 2012
PDF 99 27 Jun 2012
ZIP 279 27 Jun 2012
ZIP 282 27 Jun 2012
PDF 17 27 Jun 2012
PDF 16 27 Jun 2012
PDF 33 27 Jun 2012
PDF 31 27 Jun 2012

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