N3860VG Demo Board Test Report

Transcription

1 N3860VG Demo Board Test Report Contents Application Reporter 15W, 5V/3A AC Adapter, Standby Power, Alex Leng Date JULY 19,

2 Table of Contents 1. Introduction.3 2.Power Supply Specification Schematic.4 4. Performance Data 5 5. Energy Performance (CEC requirement ) Waveforms Thermal data

3 1 Introduction This document is an evaluation report describing a power supply of demo board which use NIKO-SEM s N386x current mode PWM controller. The document contains the power supply specification, schematic, performance data, and thermal data. 2.Power Supply Specification Description Symbol Min. Typ. Max Units Comment Input Output Voltage Frequency No load power (264VAC) Output Voltage Output current Continuous output power Vin f(line) Vout Iout Pout /230 50/ W Efficiency η 80 % Environmental Designed to meet IEC950,UL950 Class Ⅱ Ambient Temperature Over voltage protection Short circuit protection Vout Vac Hz W V A W 8 V No flame or smoke and auto recovery. Set output at max. load Less than 2W input power - 3 -

4 3. Schematic Figure 1: Schematic - 4 -

5 4. Performance Data All measurements performed at room temperature, 60 Hz input frequency. 4.1 Figure 2: Efficiency vs. Input Voltage. Efficiency vs Input Voltage Output Efficiency (%) Input Voltage(Vac) Figure 3:Measurement Data Efficiency vs. Input Voltage Line Voltage Output Efficiency

6 4.2 Figure 4: Efficiency vs. Load. Efficiency vs. Load Output Efficiency Output Power Figure 5:Measurement Data Efficiency vs. Load Output Power Output Efficiency Note: The measurement condition follow by CEC regulation at 115Vac, 60Hz, - 6 -

7 4.3 Figure 6: Constant Limit Output Power Constant Limit Power Output Power Line Voltage Figure 7:Measurement Data Constant Limit Power Line Voltage Output Power Energy Performance (CEC requirement ) - 7 -

8 All single voltage external dc-ac power suppliers, for sale in California after Jan 1 st 2007 must meet the California Energy Commission (CEC) requirement for the efficiency in the active mode of the power suppliers when tested at 115V at 60Hz and the energy consumption in the no-load mode of power suppliers when tested at 115V at 60Hz. All single voltage external power suppliers have a nameplate output current, this is the value used to determine the four active mode load condition which are 25%, 50%, 75%, and 100% of rated output power. Manufactured on or after the effective dates shown shall be not greater than the applicable values for energy consumption in the no-load mode and efficiency in the active mode shall be not less than the applicable values shown in Table U-1 Table U-2-8 -

9 5.1Active Mode CEC test data Percent of Full Load Efficiency(%) Average CEC specified minimum average efficiency(%) 5.2 N0-load Input power consumption No Load Input Power vs. Input Line Voltage Input Power Line Voltage Figure 8: No load input power vs. input line voltage, measurements at 115V at 60Hz, Room temperature, CEC limit is 500mW at no load mode as show in above

10 6. Waveforms 6.1 Drain voltage and drain current: Figure 9: 90Vac Full load(5v/3a) Channel 2: V-Drain 100V/div Channel 4: I-Drain 0.5A/div Figure 10: 264Vac Full load(5v/3a) Channel 2: V-Drain 200V/div Channel 4: I-Drain 0.5A/div 6.2 No-load and Output voltage start-up Figure 11: 264Vac no load(5v/0a) Channel 2: V-Drain 100V/div Figure 12: Start-up, 90Vac Full load(5v/3a) Channel 2:Output Voltage 2V/div, 2ms/div

11 6.3 Over voltage and Short output protection Figure 13: Over voltage, 264Vac Full load(5v/3a) Channel 2:Output Voltage 2V/div, 10ms/div. Figure 14: Short output, 264Vac Full- load Channel 1:AUX Voltage 5V/div, 1s/div. Channel 2:V-Drain 100V/div, 1s/div. 6.4 Load transient response Figure 15: Transient Response, 90Vac 100%-0%-100% Load Step. Channel 2: Output Voltage 200mV/div Channel 4: Load Current 1A/div,10ms/div. Figure 16: Transient Response, 264Vac 100%-0%-100% Load Step. Channel 2: Output Voltage 200mV/div Channel 4: Load Current 1A/div,10ms/div

12 7. Thermal data All measurements performed at room temperature without air flow. Item Temperature( ) 90VAC 264VAC Ambient N3860VG(U1) Transformer(T1) Output Rectifier(D4) Power MOSFET Note: The measurement temperatures are subject to change with using another heatsink, therefore your are strongly recommended to design a heatsink which is able to make all semiconductors under their guaranteed temperature