Description

The NCL31000 is a new member of the ON Semiconductor LED

driver family specifically targeting luminaire applications. NCL31000

incorporates a high efficient buck LED driver. The LED driver

supports both high?bandwidth analog dimming and PWM dimming

down to zero current. NCL31000 includes an integrated fixed 3V3

DC?DC and one adjustable DC?DC. A diagnostics block incorporates

an ADC, which measures input and LED output currents, voltages,

LED temperature, DC/DC voltages and currents. Fast safety

mechanisms protect the critical blocks of the chip. The diagnostic

measurements are available together with a flexible status reporting

and interrupt mechanism. NCL31001 is the same as NCL31000 except

that it does not include both DC?DC converters. The combination of

NCL31000 and NCL31001 is ideal for dual channel solutions.

Features

? Wide Input Voltage Range: 21.5 V to 57 V

? Proprietary 100 W+ Applications

? Integrated 3.3 V Buck Convertor (Only for NCL31000)

? Integrated Adjustable Buck Convertor 2.5 ? 24 V (Only for

NCL31000)

? Integrated High Efficiency Buck LED Driver

? Adjustable Switching Frequency 44.4 kHz to 1 MHz

? Deep Dimming to Zero with Accuracy of 0.1 Using Internal

Precision 2.4 V Reference

? Best in Class Linearity

? High Modulation Bandwidth (~50 kHz)

? Visual Light Communication Capable

? Yellow?Dot Compliant

? Internal DIM DAC for Independent LED Control During

Micro?controller Re?flashing (Warm Boot)

? Low EMI Reference Design

? I2C/SPI Interface (I/S Suffix)

? High Accuracy Diagnostic Functions to Measure Voltages/Currents

? Protection against LED Shorts & Opens

? LED Over/Under Voltage & Over Current Protection

? Chip Over Current Protection

? Chip & LED Over Temperature Protection

? Junction Temperature Range of ?40°C to +125°C

? Available in 48?pin QFN 7x7

? These Devices are Pb?Free and are RoHS Compliant