TLC5960 Datasheet, PDF (1/33 Pages) Texas Instruments – Eight-Channel LED Driver with Intelligent Headroom Voltage Monitor (iHVM)

TLC5960
www.ti.com
Eight-Channel LED Driver
with Intelligent Headroom Voltage Monitor (iHVM™)
Check for Samples: TLC5960
SBVS147 – SEPTEMBER 2010
FEATURES
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•23 250kHz PWM Dimming
• Four Intelligent Headroom Voltage Monitor
(iHVM) Outputs
• Eight-Channel, High-Voltage LED Driver:
– 0.3% (typ) Accuracy Between Channels
• Control Interface with Four PWM Inputs
• Easy-To-Use Analog Dimming Interface
• 10% to 100% Analog Brightness Dimming
• Integrated 5V Internal Regulator
• Integrated Power-On Reset (POR) Circuitry
• Full Protection/Diagnostic Functions:
– LOD: LED Open Detection
– LSD: LED Short Detection
– FOD: FET Open Detection
– FSD: FET Short Detection
• Built-In Phase Shift Function
• 38-Pin TSSOP Package
APPLICATIONS
• LED Backlights for LCD-TV
• High-Current LED Lighting
DESCRIPTION
The TLC5960 is an eight-channel PWM LED driver with four intelligent headroom voltage monitor (iHVM)
outputs. The LED drivers have scalable, high-voltage capability and provide 1% maximum current matching
accuracy between LED strings. To achieve optimal efficiency, the iHVM automatically optimizes the external
dc/dc converter output voltage to compensate for the forward-voltage variations of the LED
Compared to a conventional HVM solution that requires several MOSFETs, capacitors, and resistors, the iHVM
is designed to use only a single external resistor. The LED driver design is capable of up to 250kHz PWM
dimming, and also provides an analog brightness dimming interface. This device easily adapts to various LED
and power configurations with a single voltage input rail. Full protection and diagnostic functions are provided to
protect the entire system, such as LED open/short detection (LOD/LSD), FET open/short detection (FOD/FSD)
and thermal shutdown (TSD). In case of failure, the TLC5960 automatically disconnects the failed channel(s)
from the operating channels and pulls down the open drain fault buffer (XFLT) to signal an error status. iHVM™
DC/DC4
DC/DC3
DC/DC2
DC/DC1
V_LED1
V_LED4
Ch1
Ch2
Ch8
VIN D1 G1 S1
HVM[1:4]
CTRL[1:4]
EN
VADJ
D2 G2 S2
TLC5960
D8 G8 S8
XFLT
VREG5
Typical Application Circuit
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
iHVM is a trademark of Texas Instruments.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2010, Texas Instruments Incorporated