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