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UBA3077HN/1,518 PDF预览

UBA3077HN/1,518

更新时间: 2024-01-15 01:38:47
品牌 Logo 应用领域
恩智浦 - NXP /
页数 文件大小 规格书
25页 178K
描述
Three-channel switched-mode LED driver, SOT618-1 Package, Standard Markigg, Reel Dry Pack, SMD, 13"

UBA3077HN/1,518 技术参数

生命周期:ActiveReach Compliance Code:compliant
风险等级:5.68Base Number Matches:1

UBA3077HN/1,518 数据手册

 浏览型号UBA3077HN/1,518的Datasheet PDF文件第2页浏览型号UBA3077HN/1,518的Datasheet PDF文件第3页浏览型号UBA3077HN/1,518的Datasheet PDF文件第4页浏览型号UBA3077HN/1,518的Datasheet PDF文件第5页浏览型号UBA3077HN/1,518的Datasheet PDF文件第6页浏览型号UBA3077HN/1,518的Datasheet PDF文件第7页 
UBA3077HN  
Three-channel switched-mode LED driver  
Rev. 1 — 8 February 2011  
Objective data sheet  
1. General description  
The UBA3077HN is a high efficiency LED driver in an HVQFN40 package for general LED  
lighting or backlighting LCD displays.  
Operating from a supply of 10 V to 42 V, it can drive up to 3 strings of 20 LEDs each. The  
low voltage circuitry is powered by an external 5 V voltage supply.  
The chip can operate autonomously or be controlled via a 400 kHz I2C-bus.  
The peak current in each string is fixed by an external resistor. Three independent  
Pulse-Width Modulated (PWM) signals are available for dimming purposes. These PWM  
signals are delivered either directly by the graphic processor (direct control mode) to the  
pins PWM1, PWM2 and PWM3, or generated on-board based on data sent via the  
I2C-bus interface.  
Each LED string is supplied by its own boost converter delivering an output voltage from  
V
IN up to 75 V. The switching frequency is 500 kHz.  
A power saving mode is entered when all PWM signals stay LOW for a period longer than  
1 s.  
Several protection mechanisms are available: overvoltage, short-circuit and open LED,  
overcurrent, UnderVoltage LockOut (UVLO) and overtemperature with an advanced  
adaptive protection. An error self-recovery (hiccup) mechanism is available with  
programmable delay time via an external capacitor.  
2. Features and benefits  
„ Three-channel LED backlight driver  
„ Up to 150 mA per channel  
„ ±2 % absolute LED current accuracy  
„ Peak LED current programmable with  
and channel-to-channel matching  
external resistor  
„ External power supply voltage from 10 V „ Three boost converters from VIN up to  
to 42 V and 5 V for low voltage circuitry  
„ Constant 500 kHz frequency peak  
current mode control  
75 V output voltage  
„ High efficiency up to 90 %  
„ Low value output capacitor (2 μF)  
„ 14-bit PWM dimming (either defined by  
system-generated PWMs, or internally  
generated) from 2.0 kHz to 24 kHz (duty  
cycle from 0.1 % to 100 %)  
„ Accurate internal oscillator  
„ All power FETs integrated  
 
 

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