LED7706 Datasheet

IC型號：
LED7706
PDF描述：
STMicroelectronics [6-rows 30 mA LEDs driver with boost reg...
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623.40KB
芯片廠家：
STMICROELECTRONICS

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LED7706

6-rows 30 mA LEDs driver with boost regulator

for LCD panels backlight

Features

鈻?/div>

Boost section

鈥?4.5 V to 36 V input voltage range

鈥?Internal power MOSFET

鈥?Internal +5 V LDO for device supply

鈥?Up to 36 V output voltage

鈥?Constant frequency peak current-mode

control

鈥?250 kHz to 1 MHz adjustable switching

frequency

鈥?External synchronization for multi-device

application

鈥?Pulse-skip power saving mode at light load

鈥?Programmable soft-start

鈥?Programmable OVP protection

鈥?Stable with ceramic output capacitors

鈥?Thermal shutdown

Backlight driver section

鈥?Six rows with 30 mA maximum current

capability (adjustable)

鈥?Parallelable rows for higher current

鈥?Rows disable option

鈥?Less than 500 ns minimum dimming time

(1 % minimum dimming duty-cycle at 20

kHz)

鈥?鹵2 % current matching between rows

鈥?LED failure (open and short-circuit)

detection

VFQFPN-24 4x4

Description

The LED7706 consists of a high efficiency

monolithic boost converter and six controlled

current generators (rows) specifically designed to

supply LED arrays used in the backlighting of

LCD panels. The device can manage an output

voltage up to 36 V (i.e. 10 white LEDs per row).

The generators can be externally programmed to

sink up to 30 mA and can be dimmed via a PWM

signal (1 % dimming duty-cycle at 20 kHz can be

managed). The device allows to detect and

manage the open and shorted LED faults and to

let unused rows floating. Basic protections

(Output Over-Voltage, internal MOSFET

Over-Current and Thermal Shutdown) are

provided.

鈻?/div>

Applications

鈻?/div>

LCD monitors and TV panels

PDA panel backlight

GPS panel backlight

Device summary

Order code

LED7706

VFQFPN-24 4x4 (exposed pad)

LED7706TR

Tape and reel

Rev 1

1/31

www.st.com

Table 1.

Package

Packaging

Tube

February 2008

其它有關(guān)文件
LED7706 View All Specifications
標(biāo)準(zhǔn)包裝
70
類別
集成電路 (IC)
家庭
PMIC - LED 驅(qū)動器
系列
-
恒定電流
-
恒定電壓
-
拓?fù)?/label>
PWM，升壓（升壓）
輸出數(shù)
6
內(nèi)部驅(qū)動器
是
類型 - 主要
背光
類型 - 次要
白色 LED
頻率
250kHz ~ 1MHz
電源電壓
4.5 V ~ 36 V
輸出電壓
36V
安裝類型
表面貼裝
封裝/外殼
24-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝
24-VFQFPN（4x4）
包裝
管件
工作溫度
-
配用
497-10043-ND - BOARD EVAL LCD BACKLIGHT LED7706497-8360-ND - BOARD EVAL FOR LED7707497-6445-ND - EVALUATION BOARD FOR LED7706

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