LED7707TR Datasheet

IC型號(hào)：
LED7707TR
PDF描述：
6-rows 85 mA LEDs driver with boost regulator for LCD panels...
文件大?。?/label>
1170.28KB
PDF頁(yè)數(shù)：
48頁(yè)
芯片廠家：
STMICROELECTRONICS

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LED7707

6-rows 85 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 85 mA maximum current

capability (adjustable)

鈥?Rows disable option

鈥?Less than 10

渭s

minimum dimming time

鈥?鹵2 % current matching between rows

鈥?LED failure (open and short-circuit)

detection

VFQFPN-24 4x4

Description

The LED7707 consists of a high efficiency

monolithic boost converter and six controlled

current generators (rows) specifically designed to

supply LEDs 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 85 mA and can be dimmed via a PWM

signal (1 % dimming duty-cycle at 1 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

PDAs panel backlight

GPS panel backlight

Table 1.

Device summary

Order codes

LED7707

VFQFPN-24 4x4 (exposed pad)

LED7707TR

Tape and reel

Package

Packaging

Tube

September 2008

Rev 1

1/48

www.st.com

其它有關(guān)文件
LED7707 View All Specifications
特色產(chǎn)品
LED7707 LED Driver
標(biāo)準(zhǔn)包裝
1
類別
集成電路 (IC)
家庭
PMIC - LED 驅(qū)動(dòng)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(dòng)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
Digi-Reel®
工作溫度
0°C ~ 85°C
配用
497-10044-ND - BOARD EVAL LCD BACKLIGHT LED7707
其它名稱
497-8492-6

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