DS3991VT

更新时间： 2024-11-22 04:15:15

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
16页	468K
描述
Low-Cost CCFL Controller

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DS3991VT 数据手册

Rev 0; 1/08

Low-Cost CCFL Controller

DS391

General Description

Features

♦ CCFL Controller for Backlighting LCD Panels

The DS3991 is a controller for cold-cathode fluorescent

lamps (CCFLs) that are used to backlight liquid-crystal

displays (LCDs). The DS3991 is available for both

push-pull and half-bridge drive topologies.

♦ Minimal External Components Required

♦ Lamp Fault Monitoring for Lamp-Open, Lamp-

Overcurrent, Failure-to-Strike, and Overvoltage

Conditions

The DS3991 converts a DC voltage (5V to 24V) to the

high-voltage (300V

to 1400V

) AC waveform that

RMS

♦ Accurate (±±5% On-Board Oscillator for Lamp

is required to power the CCFLs. The push-pull and half-

bridge drive schemes use a minimal number of external

components, which reduces component and assembly

cost and makes the printed circuit board (PCB) design

easy to implement. Both drive schemes provide an effi-

cient DC to AC conversion and produce near-sinu-

soidal waveforms.

Frequency (40kHz to 80kHz%

♦ Accurate (±±5% On-Board Oscillator for DPꢀM

Burst-Dimming Frequency (80Hz to 300Hz%

♦ Device Supply Undervoltage Lockout

♦ Inverter Supply Undervoltage and Overvoltage

Lockouts

♦ Soft-Start on Burst-Dimming Minimizes Audible

Transformer Noise

Applications

♦ Strike Frequency Boost

LCD PC Monitors

LCD TVs

♦ 1005 to < 105 Dimming Range

♦ Low Cost

♦ Single-Supply Operation Range: 4.±V to ±.±V

♦ Temperature Range: -40°C to +8±°C

♦ 16-Pin SO Package (1±0 mils%

Ordering Information

PART

CONFIGURATION

Push-Pull

TEMP RANGE

-40°C to +85°C

DIMMING FREQUENCY RANGE (Hz) PIN-PACKAGE

DS3991V+C

80 to 300

16 SO (150 mils)

DS3991V+T&R/C

Push-Pull

DS3991V+

Half-Bridge

DS3991V+T&R

+Denotes a lead-free package.

T&R = Tape and reel.

Pin Configuration

TOP VIEW

SVML

SVMH

SLOPE

VCC

14 VCC

13 GND

12 OVD

11 LCM

Typical Operating Circuits appear at end of data sheet.

VCC

DS3991

LOSC

POSC/PWM

BRIGHT

PWM_EN

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...16

中文翻译

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与DS3991VT相关器件

型号	品牌	获取价格	描述	数据表
DS3991VTC	MAXIM	获取价格	Low-Cost CCFL Controller
DS3991Z+HB	MAXIM	获取价格	Fluorescent Light Controller, 80kHz Switching Freq-Max, PDSO16, 0.150 INCH, LEAD FREE, SOP
DS3991Z+PP/V	MAXIM	获取价格	Fluorescent Light Controller
DS3991Z+T&R/HB	MAXIM	获取价格	Fluorescent Light Controller, 80kHz Switching Freq-Max, PDSO16, 0.150 INCH, LEAD FREE, SOP
DS3991Z+T&R/PP	MAXIM	获取价格	Fluorescent Light Controller, 80kHz Switching Freq-Max, PDSO16, 0.150 INCH, LEAD FREE, SOP
DS3991Z+T&R/PPV	MAXIM	获取价格	Fluorescent Light Controller
DS3992	MAXIM	获取价格	Two-Channel, Push-Pull CCFL Controller
DS3992Z-09N	MAXIM	获取价格	Two-Channel, Push-Pull CCFL Controller
DS3992Z-09N+	MAXIM	获取价格	Two-Channel, Push-Pull CCFL Controller
DS3992Z-09N+R	MAXIM	获取价格	Two-Channel, Push-Pull CCFL Controller

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