NXP Semiconductors
NCR401T
10 mA LED driver in SOT23
NCR401T All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved
Product data sheet 16 October 2015 6 / 12
V
SUP
(V)
0 20155 10
aaa-019591
0.4
0.8
1.2
I
GND
(mA)
0
T
amb
= 85 °C
T
amb
= -40 °C
T
amb
= 25 °C
I
O
= 0 A
Fig. 5. Ground current as a function of supply voltage; typical values
11. Application information
Fig. 6 shows a typical application circuit for an LED driver. The constant current ensures
a constant LED brightness. The output current slightly decreases when the power load at
the LED driver increases. This effect is due to self heating of the device and the negative
thermal coefficient of the output current.
aaa-019594
V
SUP
V
O
I
O
LED
GND
Fig. 6. LED driver application diagram
The output can be switched ON and OFF by connecting a Resistor-Equipped Transistor
(RET), e.g. PDTC124XU; see Fig. 7
