ON Semiconductor NCP1219PRINTGEVB, User Manual

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NCP1219PRINTGEVB
http://onsemi.com
20
Table 2. BILL OF MATERIALS
Desig-
nator
Lead
Free
Substi-
tution
Allowed
Manufacturer Part
Number Manufacturer Footprint
Toler-
ance Value Description Qty
R41,
R42
2 Resistor, SMD
1.8 k W
0.01 SM/1206 Vishay CRCW12061801FN Yes Yes
R51,
R52,
R53,
R54
4 Resistor, SMD 1.69 W 0.01 SM/1206 Vishay CRCW12061R69FN Yes Yes
T1 1 Inductor, Common
Mode Choke
10 mH -30%,
+50%
Through
Hole
Epcos B82732R2142B30 Yes Yes
T2 1 Transformer,
Flyback
400 uH - Custom,
Through
Hole
ICE
Components
TO09002-1 Yes Yes
U1 1 Switchmode
Controller
NCP1219 - SOIC-7 ON
Semiconductor
NCP1219AD65R2G No Yes
U2 1 Optocoupler open - DIP-4 - - Yes -
U3 1 Optocoupler 150% CTR - DIP-4 Vishay SFH615A-3 Yes Yes
U4 1 Programmable
Precision
Reference
TL431B - TO-92 ON
Semiconductor
TL431BCLPRMG Yes Yes
ZD1 1 Diode, Zener open - SOD-123 - - Yes -
ZD2,
ZD4
2 Diode, Zener open - SOD-123 - - Yes -
1. Coilcraft components can be ordered at http://www.coilcraft.com
2. Epcos components can be ordered at http://www.epcos.com
3. ICE Components can be ordered at http://www.icecomponents.com
4. Infineon components can be ordered at http://www.infineon.com
5. Kemet components can be ordered at http://www.kemet.com
6. TDK components can be ordered at http://www.tdk.com
7. Vishay Components can be ordered at http://www.vishay.com
The converter performance is evaluated and compared to the original goals. From Table 1, the evaluation criteria includes:
1. Efficiency.
2. Standby input power.
3. Step load response.
4. Output voltage ripple.
The efficiency of the converter is measured across the
universal input voltage range. Figure 34 shows the
efficiency vs output current at 90 Vac, 100 Vac, 115 Vac,
230 Vac and 265 Vac.
0
10
20
30
40
50
60
70
80
90
100
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
Load Current (1.25 A = 100%)
Ef
ficiency (%)
90 Vac − 47 Hz 100 Vac − 47 Hz 115 Vac − 60 Hz
230 Vac − 50 Hz 265 Vac − 50 Hz
Figure 34. Efficiency vs. output current
The average efficiency, h
avg
, as defined by the Energy
Star 2.0 External Power Supply (EPS) specification, was
calculated for various input voltages. The results are shown
in Figure 35. The converter is Energy Star 2.0 compliant,
maintaining
h
avg
greater than 83.5%.