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