Datasheet > EUP2592

EUP2592

更新时间： 2024-11-28 06:58:07

品牌	Logo	应用领域
德信 - EUTECH		驱动器
页数	文件大小	规格书
1页	49K
描述
8-String White LED Driver for LCD 8-String White LED Driver for LCD

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中文翻译

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EUP2592 数据手册

EUP2592

8-String White LED Driver for LCD

Panel Application

DESCRIPTION

FEATURES

The EUP2592 is an 8-channel WLED driver that

controls WLED current for LCD backlight application.

The EUP2592 is capable of driving up to eight strings

in parallel and 12 LEDs per string. Each string is

terminated with ballast that achieves ±1.5% current

regulation accuracy between strings, ensuring even

LED brightness. The EUP2592 have wide input

voltage range from 4.5V to 28V, and provide

adjustable 5mA to 35mA LED current. EUP2592 uses

an external PWM signal to control WLED dimming.

EUP2592 has built in many fault protections.

ꢀ

Up to 8 strings in parallel and 12 LEDs per

string Maximum number of LEDs that can be

driven is 96 (8x12) WLEDs

ꢀ

Accurate PWM Dimming Control with 8-bit

Resolutions

ꢀ

External Direct PWM Dimming Control Mode

Wide Input Voltage Range 4.5V to 28V

Internal 0.15Ω 48V Power MOSFET

±1.5% LED Current Regulation Accuracy

Between Strings

ꢀ

Dynamic Headroom Control for LED Outputs

Low String Feedback Voltage: 360mV at 20mA

LED Current

The EUP2592 step-up controller features an internal

150mΩ (typ.), 48V (max.) power MOSFET with local

current-sense amplifier for accurate cycle-by-cycle

current limit. This architecture greatly simplifies the

external circuitry and saves PCB space. The EUP2592

minimizes the headroom voltage of output and power

loss by detecting the highest LED forward voltage

dynamically. Low-feedback voltage at each LED string

360mV (typ.) at 20mA LED current helps reduce

power loss and improve efficiency.

ꢀ

User Selectable Switching Frequency 500kHz

and 1200kHz

Multiple Fault Protections

-LED Open Circuit Detection

-LED Short Circuit Detection

-Over-Temperature Protection

-Output Over-Voltage Protection

-Input over current protection

ꢀ

Small 24-Pin, 4mm x 4mm, Thin TQFN

Package

RoHS Compliant and 100% Lead (Pb)-Free

The EUP2592 internally generates a PWM signal for

accurate WLED dimming control. The PWM

frequency is resistor programmable, while PWM duty

cycle is controlled directly from an external PWM

signal or through an adjustable resistor at PWMO pin.

This internal PWM dimming control provides a

dimming range with 8-bit resolution to maximize

battery life. The EUP2592 WLED brightness can also

be directly modulated with an external PWM signal

from 100Hz to 10kHz.

APPLICATIONS

ꢀ

Notebook Displays LED Backlighting

LCD Monitor LED Backlighting

The EUP2592 have extensive protection that include

string open and short detection, over voltage protection,

over-temperature protection and an optional input

over-current protection with an external fault

disconnect switch.

DS2592 Ver1.0 Aug. 2009

中文翻译

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