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.


Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 5
Iout (Max) (A) 2.1
Output Power 10.5
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Quasi Resonant
Flyback- DCM

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS2511  USB Dedicated Charging Port Controller and Current Limiting Power Switch  USB Power and Charging Port Controllers  Sample & Buy View Design Kits & Evaluation Modules
UCC28700  Constant-Voltage, Constant-Current PWM With Primary-Side Regulation  AC/DC and Isolated DC/DC Power Supply  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents
User Guides (1)
Title Abstract Type Size (KB) Date Views
PDF 2171 27 Jun 2012 149
Design Files (8)
Title Abstract Type Size (KB) Date Views
PDF 107 27 Jun 2012 133
PDF 99 27 Jun 2012 88
ZIP 279 27 Jun 2012 45
ZIP 282 27 Jun 2012 28
PDF 17 27 Jun 2012 199
PDF 16 27 Jun 2012 126
PDF 33 27 Jun 2012 290
PDF 31 27 Jun 2012 189

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