IC manufacturers Analog Devices

IC manufacturers (99)

Analog Devices LT3965

8-Switch Matrix LED Dimmer

Overview

TopologyBuck Converter

Description

The LT®3965 is an LED bypass switching device fordimming individual LEDs in a string using a commoncurrent source. It features eight individually controlledfloating source 17V/330mΩ NMOS switches. The eightswitches can be connected in parallel and/or in series tobypass current around one or more LEDs in a string. TheLT3965 uses the I2C serial interface to communicate withthe microcontroller. Each of the eight channels can beindependently programmed to bypass the LED string inconstant on or off, or PWM dimming with or without fadetransition. Using the fade option provides 11-bit resolutionlogarithmic transition between PWM dimming states.The LT3965 provides an internal clock generator and alsosupports external clock source for PWM dimming. TheLT3965 reports fault conditions for each channel such asopen LED and shorted LED. The four address select pinsallow 16 LT3965 devices to share the I2C bus. The deviceis available in a 28-lead TSSOP package

Features

Eight Independent 17V 330mΩ NMOS Switchesn Independent On/Off/Dimming Control of 1 to 4 LEDsfor Each Switchn I2C Multidrop Serial Interface with ProgrammableOpen LED and Shorted LED Fault Reportingn 16 Unique I2C Addressesn VDD Range: 2.7V to 5.5V and VIN Range: 8V to 60Vn Digital Programmable 256:1 PWM Dimmingn Fade Transition Between PWM Dimming Statesn Optional Internal Clock Generator or External ClockSource for PWM Dimmingn Open LED Overvoltage Protectionn Flicker Free PWM Dimming

Typical applications

  • Large LED Displays
  • Automotive LED Headlight Clusters
  • Automated Camera Flash Equipment
  • RGBW Color Mixing Lighting

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersionISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
MaterialMount Samples
7443251000SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCI SMT Flat Wire High Current Inductor 10 9.5 17.93 21 1050 SMT 4 8.5 16.3 Superflux SMT
74437349150SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-LHMI SMT Power Inductor 15 3.6 92 10 7050 SMT 3.5 7.2 SMT
7443551151SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCI SMT Flat Wire High Current Inductor 15.4 10 15400 15 1365 SMT 3.5 8 14.8 WE-PERM SMT
7447789133SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor 33 1.85 240 16 7332 Robust 1.15 1.45 SMT
Order Code Data­sheet Simu­lation
7443251000SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

74437349150SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7443551151SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7447789133SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
RDC max.
(mΩ)
fres
(MHz)
SizeVersionISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
MaterialMount Samples