Datasheet

NCL30160
http://onsemi.com
2
Figure 1. Typical Application Circuit
D1
NCL30160
R
OT
C
IN
VIN
VIN
VCC
CS
LX
L1
C
VCC
R
SENSE
GND
ROT
DIM
/Enable
LED
LED
…
PIN FUNCTION DESCRIPTION
Pin Pin Name Description Application Information
1, 2 CS Current Sense feedback pin Set the current through the LED array by connecting a resistor from this pin to
ground.
3 GND Ground Pin Ground. Reference point for all voltages
4 VCC Output of Internal 5 V linear
regulator
The VCC pin supplies the power to the internal circuitry. The VCC is the
output of a linear regulator which is powered from VIN. A 2 uF ceramic
capacitor is recommended for bypassing and should be placed as close as
possible to the VCC and AGND pins. Do not connect to an external load.
5 ROT Off−Time Setting Resistor Resistor ROT from this pin to VCC sets the Off−Time range for the hysteretic
controller.
6 DIM/EN PWM Dimming Control &
ENABLE
Connect a logic−level PWM signal to this pin to enable/disable the power
MOSFET and LED array
7 VIN Input Voltage Pin Nominal operating input range is 6.3 V to 40 V. Input supply pin to the internal
circuitry and the positive input to the current sense comparators. Due high
frequency noise, a 10 mF ceramic capacitor is recommended to be placed as
close as possible to VIN and power ground.
8 LX Drain of Internal Power
MOSFET
The LX pin connects to the inductor and provides the switching current
necessary to operate in hysteretic mode.