LM3444-230VAC NSC [National Semiconductor], LM3444-230VAC Datasheet - Page 9

• Manufacturer Part Number: LM3444-230VAC
• Description: 8W Isolated Flyback LED Driver Industrial and Commercial Lighting
• Manufacturer: NSC [National Semiconductor]

Ch1: Output Voltage (10 V/div); Ch3: LED Current
1.000
0.995
0.990
0.985
0.980
0.975
0.970
0.965
0.960
0.955
0.950
25.0
22.5
20.0
17.5
15.0
12.5
10.0
7.5
5.0
2.5
0.0
(V
180 190 200 210 220 230 240 250 260
180 190 200 210 220 230 240 250 260
IN
Output Voltage and LED Current
Output Power vs. Line Voltage
Power Factor vs. Line Voltage
= 230V
(100 mA/div); Time (4 ms/div)
Mod C (10 LEDs)
Mod A (4 LEDs)
INPUT VOLTAGE (V RMS )
INPUT VOLTAGE (V RMS )
Modified Circuits
RMS
, 6 LEDs, I
Mod B (8 LEDs)
Original (6 LEDs)
LED
= 350mA)
30139720
30139717
30139712
9
Ch1: Drain Voltage (100V/div); Ch4: ISNS Voltage
Ch1: Line Voltage (100 V/div); Ch3: Line Current
Power MOSFET Drain and ISNS (Pin-7) Voltage
(V
(V
12
11
10
9
8
7
6
5
4
3
2
180 190 200 210 220 230 240 250 260
IN
IN
Output Power vs. Line Voltage
Line Voltage and Line Current
= 230V
= 230V
(500 mV/div); Time (4 µs/div)
(20 mA/div); Time (4 ms/div)
LINE VOLTAGE (V RMS )
RMS
RMS
Original Circuit
, 6 LEDs, I
, 6 LEDs, I
10 LEDs
LED
LED
4 LEDs
8 LEDs
= 350mA)
= 350mA)
6 LEDs
30139718
30139721
www.national.com
30139713