NCP1203GEVB ON Semiconductor, NCP1203GEVB Datasheet - Page 11

• Manufacturer Part Number: NCP1203GEVB
• Description: EVAL BOARD FOR NCP1203G
• Manufacturer: ON Semiconductor

Specifications of NCP1203GEVB

• Design Resources: NCP1203GEVB BOM NCP1203GEVB Gerber Files NCP1203 EVB Schematic
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Voltage - Output: 19V
• Current - Output: 4A
• Voltage - Input: 85 ~ 230VAC
• Regulator Topology: Flyback
• Frequency - Switching: 60kHz
• Board Type: Fully Populated
• Utilized Ic / Part: NPC1200
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: NCP1203G
• Other names: NCP1203GEVBOS

Board Final Results
Standby Power
Watt-hour accumulation mode for best accuracy (run length
= 30 minutes).
Line Regulation
input voltage is moving between both range ends. As one
can see, current mode control with good open- loop gain
ensures a
variation (-106 dB DC audio susceptibility).
Load Regulation
possible to plot the load regulation of the board as shown in
Figure 15.
Measured on an Infratek watt-meter operated in
Vin = 120 VAC, Vout = 16.76 V, Iout = 0
Vin = 240 VAC, Vout = 16.76 V, Iout = 0
The array in Figure 14 shows the performance when the
By varying the load current between 11 W and 70 W, it is
16.740
16.735
16.730
16.725
16.720
16.715
16.710
16.705
16.700
Figure 14. Line Regulation Is Excellent Thanks to
Current Mode and a Good Open-Loop DC Gain
100
Vout less than 1 mV for a 212 VDC input
120
140
Input Voltage (VAC)
160
180
200
Pin = 78 mW
Pin = 84 mW
220
http://onsemi.com
240
AND8076/D
11
Efficiency
winding for best standby performance, and another one with
the Dynamic Self-Supply (DSS) left normally working.
Because of the auxiliary winding, it has been necessary to
further clamp the drain voltage in order to improve the
primary overload detection. It is not necessary with the DSS
and therefore the RCD drain clamp network can be less
aggressive, thus slightly improving the efficiency. Board 2
also features a 6 A MOSFET compared to a 3 A MOSFET
on board 1.
16.765
16.760
16.755
16.750
16.745
16.740
16.735
16.730
16.725
16.720
16.715
We have designed two boards, one using the auxiliary
Board 1, aux. winding: Vin = 110 VAC,
Board 2, DSS:
Figure 15. Load Regulation at Two Different
0
110 VAC
20
Input Voltages
Output Power (W)
240 VAC
Vin = 240 VAC,
Vin = 110 VAC,
Vin = 240 VAC,
40
60
= 79%
= 83.4%
= 83.5%
= 84.8%
80