nsi50350ad ON Semiconductor, nsi50350ad Datasheet - Page 4

• Manufacturer Part Number: nsi50350ad
• Description: Nsi50350adt4g Constant Current Regulator & Led Driver
• Manufacturer: ON Semiconductor

current through itself and any devices in series with it. The
device has a slight negative temperature coefficient, as
shown in Figure 2 – Tri Temp. (i.e. if the temperature
increases the current will decrease). This negative
temperature coefficient will protect the LEDS by reducing
the current as temperature rises.
regulation with only 0.5 V across it.
durations of up to 50 V so long as the die temperature does
not exceed 175°C. The determination will depend on the
thermal pad it is mounted on, the ambient temperature, the
pulse duration, pulse shape and repetition.
Single LED String
or a Low Side Driver. The number of the LEDs can vary
from one to an unlimited number. The designer needs to
calculate the maximum voltage across the CCR by taking the
maximum input voltage less the voltage across the LED
string (Figures 7 and 8).
The CCR is a self biased transistor designed to regulate the
The CCR turns on immediately and is typically at 20% of
The device is capable of handling voltage for short
The CCR can be placed in series with LEDs as a High Side
Figure 7.
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Higher Current LED Strings
parallel. The current through them is additive (Figure 9).
Two or more fixed current CCRs can be connected in
Figure 8.
Figure 9.