NCL30082ADMR2G ON Semiconductor, NCL30082ADMR2G Datasheet - Page 23

• Manufacturer Part Number: NCL30082ADMR2G
• Description: LED Lighting Drivers Dimmable Quasi-Res I-Mode Cntlr
• Manufacturer: ON Semiconductor

Specifications of NCL30082ADMR2G

• Rohs: yes
• Input Voltage: 18 V
• Operating Frequency: 65 kHz
• Maximum Supply Current: 1.2 mA
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: Micro-8
• Minimum Operating Temperature: - 40 C

V
the controller must be able to safely limit the output voltage
excursion.
Valley Lockout
switching frequency excursion. The switching frequency
increases when the output load decreases or when the input
voltage increases. The switching frequency of such systems
must be limited.
increases and as the output current set−point is varied
(dimming and thermal fold−back). This limits the switching
frequency excursion. Once a valley is selected, the
controller stays locked in the valley until the input voltage
CC
If no output load is connected to the LED power supply,
Quasi−square wave resonant systems have a wide
The NCL30082 changes the valley as the input voltage
800m
600m
400m
200m
Over Voltage Protection (Open LED Protection)
40.0
30.0
20.0
10.0
40.0
30.0
20.0
10.0
8.00
6.00
4.00
2.00
0
0
0
0
1.38
V CC(OVP)
V CC(on)
V CC(off)
Figure 55. Open LED Protection Chronograms
3.96
http://onsemi.com
time in seconds
6.54
23
V
the 4−s timer starts counting. The IC re−start pulsing after
the 4−s timer has elapsed and when V
or the output current set−point varies significantly. This
avoids valley jumping and the inherent noise caused by this
phenomenon.
detection in Figure 56). The internal logic selects the
operating valley according to VIN pin voltage, SD pin
voltage and DIM pin voltage.
controller operates in the first valley at low line and in the
second valley at high line.
CC(OVP)
In the NCL30082, when the V
The input voltage is sensed by the VIN pin (line range
By default, when the output current is not dimmed, the
threshold, the controller stops the DRV pulses and
9.11
CC
11.7
CC
voltage reaches the
≥ V
CC(on)
1
2
3
4
.
V out
I out
V CC
OVP