High Voltage Input (184Vac…707Vac) to 12V@1A, 3.3V@100mA Non-isolated Flyback Reference Design PMP8678 (ACTIVE)

Description & Features

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Description

The UCC28720 is a quasi resonant controller and is specialized to drive high voltage BJTs. When the drain voltage is higher than 1KV, BJTs are the best choice for low to mid power flyback converters. In this case two voltages are supplied: 12V@1A and 3.3V@100mA.

Features
  • Over 84% efficiency at full load
  • Over 70% efficiency at 10% load
  • Provides 12V and 3.3V outputs
  • Works continuously up to 440Vac input and survives 1KVpeak surge

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Schematic/Block Diagram

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Design Files

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Parametrics
 PMP8678.1
(Output Voltage 1)
PMP8678.2
(Output Voltage 2)
Vin (Min) (V)185185
Vin (Max) (V)700700
Vout (Nom) (V)3.312
Iout (Max) (A).11
Output Power (W).3312
Isolated/Non-IsolatedNon-IsolatedNon-Isolated
Input TypeDCDC
TopologyBuck- Integrated SwitchFlyback- Quasi Resonant

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS560200  17V Input, 500mA Synchronous Step-Down Regulator in SOT-23 with Advanced Eco-Mode™  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
UCC28720  Constant-Voltage, Constant-Current Controller with Primary-Side Regulation for Bipolar Power Devices  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)
TPS560200 Download Download
UCC28720 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 822 20 Oct 2014
Design files (3)
Title Type Size (KB) Date
ZIP 52 20 Oct 2014
PDF 36 20 Oct 2014
PDF 192 20 Oct 2014

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