Device Information
 
 
ISL97673 Printer Friendly Version
6-Channel SMBus or PWM Dimming LED Driver with Phase Shift Control
 
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ISL97673IRZDetails
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Datasheet
Adobe Acrobat Document ISL97673
6-Channel SMBus or PWM Dimming LED Driver with Phase Shift Control
TopologiesInductor Boost
# of LEDs (max)78
# of Channels6
Digital InterfaceSMBus/I2C
Backlight For LCD Size (inches)up to 17
Total Current for DC/DC Lighting (mA)240
IOUT (max/Channel) (mA)40
Peak Efficiency (%)92.9
VIN (V)4.5 to 26.5
VOUT (max) (V)45
Frequency (MHz)0.6/1.2
IS (max) (mA)5
Iq (max) (μA)5
Isw (typ) (mA)2000
Integrated DiodeN
OVPY
Fault SwitchY
Brightness ControlSMBus, PWM or DC
 

Product Information

Key Features
  • 6 Channels
  • 4.5V to 26.5V Input
  • 45V Output Max
  • Up to 40mA LED Current per channel
  • Extensive Dimming Control
    • PWM/DPST Dimming, I2C 8-bit with equal phase shift, and 0.007% Direct PWM dimming at 200Hz
  • Optional Master Fault Protection
  • PWM Dimming Linearity 0.4%~100% <30kHz
  • 600kHz/1.2MHz selectable switching frequency
  • Dynamic Headroom Control
  • Protections with Flag Indication
    • String Open/Short Circuit, VOUT Short Circuit, Overvoltage and Over-Temperature Protections
    • Optional Master Fault Protection
  • Current Matching ±0.7%
  • 20 Ld 4mmx3mm QFN Package
Description

The ISL97673 is a 6-Channel 45V dual dimming capable LED driver that can be used with either SMBus/I2C or PWM signal for dimming control. The ISL97673 drives 6 channels of LED to support 78 LEDs from 4.5V to 26V or 48 LEDs from a boost supply of 2.7V to 26V and a separate 5V bias on the ISL97673 VIN pin.

The ISL97673 compensates for non-uniformity of the forward voltage drops in the LED strings with its 6 voltage controlled-current source channels. Its headroom control monitors the highest LED forward voltage string for output regulation, to minimize the voltage headroom and power loss in a typical multi-string operation.

The ISL97673 features optional channel phase shift control to minimize the input, output ripple characteristics and load transients as well as spreading the light output to help reduce the video and audio interference from the backlight driver operation. The phase shift can be programmed with equal phase angle or adjustable in 7-bit resolution.

The ISL97673 has a full range of dimming capabilities that include SMBus/I2C controlled PWM dimming or DC dimming. Another key feature of the ISL97673 is that it allows very linear PWM dimming from 0.4% to 100% of up to 30kHz. Current matching of 0.4% to 100% dimming achieves ±1% tolerance from 100Hz to 5kHz dimming and ±3% tolerance from 5kHz to 30kHz dimming.

Pricing / Packaging / Samples / Ordering

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 Check distributor inventoryGreen/Pb(Lead free) Device Available in RoHS/Pb-Free 
Part No.Design-In
Status		Temp.PackageMSLPrice
US $		PB Free
ISL97673IRZ Active Ind 20 Ld QFN 1 1.28 PB Free Disti-Buy Sample
ISL97673IRZ-T Active Ind 20 Ld QFN T+R 1 1.28 PB Free Disti-Buy  
ISL97673IRZ-TK Active Ind 20 Ld QFN T+R 1 1.28 PB Free Disti-Buy  
The price listed is the manufacturer's suggested retail price for quantities of 1K units. However, prices in today's market are fluid and may change without notice.
MSL = Moisture Sensitivity Level - per IPC/JEDEC J-STD-020
SMD = Standard Microcircuit Drawing

Technical Documentation

Datasheet(s):
Evaluation Board(s):
Technical Homepage:
Tools And Support
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No Models Available
Application Block Diagrams
Applications
  • Notebook Displays WLED or RGB LED Backlighting
  • LCD Monitor LED Backlighting
  • Automotive Displays LED Backlighting
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