UM10781 Datasheet, PDF (11/22 Pages) NXP Semiconductors – GreenChip TEA1892DB1226 synchronous rectifier controller add-on board

NXP Semiconductors
UM10781
TEA1892DB1226 synchronous rectifier controller add-on board
5. Measurements
5.1 Introduction
The performance has been measured on mainboard TEA1752 90 W flyback and PFC
(see Ref. 3) with the add-on module TEA1892DB1226 connected for the high-side SR.
5.1.1 Test equipment and conditions
The following test equipment is used:
• AC source: Agilent 6812B
• Power meter: Yokogawa WT210 with harmonics option
• DC electronic load: Chroma, Model 63103
• Digital oscilloscope: Yokogawa DL1640L
• Current probe Yokogawa 701933 30 A; 50 MHz
• 100 MHz, high-voltage differential probe: Yokogawa 700924
• 500 MHz, low voltage differential probe: Yokogawa 701920
• Multimeter: Keithley 2000
• ElectroMagnetic Compatibility (EMC) receiver: Rohde & Schwarz ESPI-3 + Line
Impedance Standardization Network (LISN) ENV216
The board was tested under the following conditions:
• Adapter on the lab-table with heat sinks facing downwards
• The adapter has no casing
• Ambient temperature between 20 C and 25 C
• Measurements were made after stabilization of temperature according to "test method
for calculating the efficiency of single-voltage external AC-to-DC and AC-to-AC power
supplies" of ENERGY STAR
5.2 Efficiency
Test conditions:
The adapter is set to maximum load and preheated until temperature stabilization is
achieved. Temperature stabilization is established for every load step before recording
any measurements.
Remark: The output voltage is measured at the output of the board.
The arithmetic average of the four efficiency measurements must be ≥ 87 % for adapters,
to comply with ENERGY STAR EPS2.0.
Universal mains adapters must pass the criteria at both 115 V; 60 Hz and 230 V; 50 Hz.
To meet this criteria, the PFC must be off at 25 % load and preferably on at 50 % load.
The performance was measured with and without SR (so diode ISO MOSFET).
UM10781
User manual
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 20 May 2014
© NXP B.V. 2014. All rights reserved.
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