Feature
>90% Efficiency
Universal rectified 85-265VAC input range
Constant-Current LED driver
Applications from a few mA to more than 1A output
LED string from one to hundreds of diodes
PWM Low-Frequency Dimming via Enable pin
Input Voltage Surge ratings up to 500V
Internal thermal overload protection
Product Description
The NU9910 is a PWM high-efficiency LED driver Control IC.
It allows efficient operation of High Brightness (HB) LEDs from
voltage sources ranging from 85VAC up to 265VAC.
The NU9910 controls an external MOSFET at fixed switching
frequency up to 100KHZ. The frequency can be programmed
using a Single external resistor. The LED string is driven at
constant current rather than constant voltage, thus providing
constant light output and enhanced reliability. The output
current can be programmed between a few milliamps and up to
more than 1A.
NU9910 uses a rugged high voltage junction isolated process
that can withstand an input voltage surge of up to 450V.
Output current to an LED string can be programmed to any
value between zero and its maximum value by applying an
external control voltage at the linear dimming control input of
the NU9910. The NU9910 provides a low-frequency PWM
dimming input that can accept an external Control signal with
a duty ratio of 0-100% and a frequency of up to a few
kilohertz.
