User guide

User manual Rev. 1 — 21 May 2012 3 of 23

NXP Semiconductors

UM10533

TEA1723BT GreenChip SP SMPS demo board

1. Introduction

This user manual describes an 11 W Constant Voltage or Constant Current (CV/CC)

universal input power supply for

tablet adapters and chargers. This demo board is based on

the TEA1723BT GreenChip SP integrated circuit.

The TEA1723BT GreenChip SP provides ultra-low no-load power consumption without

using additional external components. Designs are cost-effective using the TEA1723BT

GreenChip SP because only a few external components are needed in a typical

application. In addition, the TEA1723BT provides advanced control modes for optimal

performance. The TEA1723BT integrates the 700 V power MOSFET switch and SMPS

controller.

Remark: All voltages are in V (AC) unless otherwise stated

2. Safety Warning

The complete demo board application is AC mains voltage powered. Avoid touching the

board when power is applied. An isolated housing is obligatory when used in uncontrolled,

non-laboratory environments. Always provide galvanic isolation of the mains phase using

a variable transformer. The following symbols identify isolated and non-isolated devices.

WARNING

Lethal voltage and fire ignition hazard

The non-insulated high voltages that are present when operating this product, constitute a

risk of electric shock, personal injury, death and/or ignition of fire.

This product is intended for evaluation purposes only. It shall be operated in a designated test

area by personnel qualified according to local requirements and labor laws to work with

non-insulated mains voltages and high-voltage circuits. This product shall never be operated

unattended.

a. Isolated. b. Non-isolated

Fig 1. Isolated and non-isolated symbols

019aab173

019aab174