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TLC5960DA 参数 Datasheet PDF下载

TLC5960DA图片预览
型号: TLC5960DA
PDF下载: 下载PDF文件 查看货源
内容描述: 八通道LED驱动器,智能余量电压监控器( iHVM ) [Eight-Channel LED Driver with Intelligent Headroom Voltage Monitor (iHVM)]
分类和应用: 驱动器监控
文件页数/大小: 33 页 / 664 K
品牌: TI [ TEXAS INSTRUMENTS ]
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www.ti.com
SBVS147 – SEPTEMBER 2010
Eight-Channel LED Driver
with Intelligent Headroom Voltage Monitor (iHVM™)
Check for Samples:
1
FEATURES
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
23
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
LED4
V
LED1
Ch1
Ch2
Ch8
VIN
D1 G1 S1
D2 G2 S2
D8 G8 S8
HVM[1:4]
CTRL[1:4]
EN
VADJ
TLC5960
XFLT
VREG5
Typical Application Circuit
1
2
3
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.
All other trademarks are the property of their respective owners.
Copyright © 2010, Texas Instruments Incorporated
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.