ISL6745ALEVAL3Z Intersil, ISL6745ALEVAL3Z Datasheet - Page 6

• Manufacturer Part Number: ISL6745ALEVAL3Z
• Description: EVAL BOARD 3 FOR ISL6745
• Manufacturer: Intersil

Specifications of ISL6745ALEVAL3Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical Performance Characteristics with
Dimmer
See “Schematic With/Without Triac Dimming Compatible” on
page 8, tables 5 and 6. Connect the P1 and P2 of the LED
driver board to the AC power supply. A string of 6 Cree high
power white LEDs is connected to the output terminal of the
LED driver board. The efficiency of the driver is shown in
Table 2 for 110V input.
The operation waveforms are shown in Figures 19 to 24,
respectively. Figures 19 to 22 show the rectified input
voltage and current for different inputs. Figures 23 and 24
show the overshot of the LED. Current is greatly reduced
with the delayed start-up circuit.
FIGURE 19. PHASE CONTROLLED VOLTAGE AND INPUT
TABLE 2. EFFICIENCY AND POWER FACTOR WITH DIMMER
PHASE
WIDTH
7.436
5.844
5.212
4.512
3.984
3.404
2.588
1.808
(ms)
POWER
CURRENT
INPUT
15.064
12.428
10.212
16.99
7.758
5.100
2.629
0.756
(W)
I/INPUT
V/INPUT
C4: IIN 200mA/DIV
C1: VIN 100V/DIV
0.671
0.600
0.501
0.401
0.300
0.200
0.093
0.015
(mA)
LED
I
6
18.332
17.777
17.608
17.443
17.182
16.724
15.851
18.011
LED
(V)
V
0.99
0.94
0.87
0.75
0.64
0.51
0.35
0.17
PF
Application Note 1487
72.40
71.74
71.66
69.14
67.45
67.38
59.16
31.45
EFF
(%)
FIGURE 20. PHASE CONTROLLED VOLTAGE AND INPUT
FIGURE 21. PHASE CONTROLLED VOLTAGE AND INPUT
FIGURE 22. PHASE CONTROLLED VOLTAGE AND INPUT
C1: VIN 100V/DIV
C1: VIN 100V/DIV
V/INPUT
CURRENT
CURRENT
CURRENT
I/INPUT
V/INPUT
I/INPUT
I/INPUT
V/INPUT
C1: VIN 100V/DIV
C4: IIN 500mA/DIV
C4: IIN 500mA/DIV
C4: IIN 200mA/DIV
July 28, 2009
AN1487.0