LT3964 Dual 36 V, 1.6 A Buck LED Converter

Analog Devices’ is a dual buck LED DC/DC converter for general purpose, industrial, medical, and automotive lighting

Image of Linear Technology's LT3964 LED ConverterPower by Linear/Analog Devices’ LT3964 is a dual buck (step down) 36 V, 1.6 A LED DC/DC converter. This converter is designed to operate as a constant-current and constant-voltage source. The fixed frequency and peak current mode topology result in stable operation over a wide range of supply and output voltages. The ground referred voltage FB pin serves as the input for several LED protection features and allows the converter to operate as a constant-voltage source. An external resistor sets the maximum output current, and the output current amplifier has a rail-to-rail common mode range. LT3964 uses an I2C interface to communicate with a microcontroller to read LED faults, write PWM and analog dimming registers, and set fault masking. The I2C PWM input provides LED dimming ratios up to 8192:1. The I2C programmable CTRL register sets the gain of the external CTRL pin, and maximum current sense threshold, providing additional analog dimming capability.

Image of Linear Technology's LT3964 LED Converter's Typical Application
  Image of Linear Technology's LT3964 LED Converter's Efficiency VIN
Features
  • Voltage range: 4 V to 36 V
  • I2C interface for internal True Color PWM™ dimming (8192:1), analog dimming and fault reporting
  • 1000:1 external true color PWM dimming and 10:1 external analog dimming
  • PMOS switch driver for PWM and output disconnect
  • ±3% constant current regulation
  • Adjustable frequency: 200 kHz to 2 MHz
  • Frequency synchronization with clock output
  • Programmable OPENLED protection with reporting
  • Short-circuit protection with reporting
  • Programmable undervoltage lockout with hysteresis
  • Internal compensation
  • 9 unique device addresses for I2C
  • Available in 5 mm x 6 mm 36-lead QFN package
  • -40°C to +125°C/+150°C
Applications
 
  • General purpose lighting
  • Industrial lighting
  • Medical lighting
  • Automotive lighting
 
  • Automotive lighting
  • Constant current sources
  • Constant voltage sources

LT3964 LED Converter

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
LT3964EUHE#PBF datasheet linkIC LED DRIVER DUAL I2C 36QFNLT3964EUHE#PBFIC LED DRIVER DUAL I2C 36QFN189 - Immediate
LT3964EUHE#PBF product page link
LT3964HUHE#PBF datasheet linkIC LED DRIVER DUAL I2C 36QFNLT3964HUHE#PBFIC LED DRIVER DUAL I2C 36QFN53 - Immediate
793 - Factory Stock
LT3964HUHE#PBF product page link
LT3964IUHE#PBF datasheet linkIC LED DRIVER DUAL I2C 36QFNLT3964IUHE#PBFIC LED DRIVER DUAL I2C 36QFN209 - Immediate
1098 - Factory Stock
LT3964IUHE#PBF product page link
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Published: 2018-07-10