DS3994Z+ datasheet, PDF - EEWORLD Datasheet

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DS3994Z+: DescriptionDisplay Drivers & Controllers 4-Ch CCFL Controller; CategoryPower/power management The power supply circuit; File Size432KB，28 Pages; ManufacturerMaxim; Websitehttps://www.maximintegrated.com/en.html; Environmental Compliance

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DS3994Z+ Overview

Display Drivers & Controllers 4-Ch CCFL Controller

DS3994Z+ Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Maxim
Parts packaging code	SOIC
package instruction	SOP, SOP28,.4
Contacts	28
Reach Compliance Code	compliant
ECCN code	EAR99
Factory Lead Time	7 weeks
Analog Integrated Circuits - Other Types	FLUORESCENT LIGHT CONTROLLER
Maximum input voltage	5.5 V
Minimum input voltage	4.5 V
JESD-30 code	R-PDSO-G28
JESD-609 code	e3
length	17.9 mm
Humidity sensitivity level	1
Number of functions	4
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	SOP
Encapsulate equivalent code	SOP28,.4
Package shape	RECTANGULAR
Package form	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	260
power supply	5 V
Certification status	Not Qualified
Maximum seat height	2.65 mm
Nominal supply voltage (Vsup)	5 V
surface mount	YES
Switch configuration	PUSH-PULL
Maximum switching frequency	80 kHz
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	GULL WING
Terminal pitch	1.27 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	7.5 mm

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Rev 1; 5/07

4-Channel Cold-Cathode

Fluorescent Lamp Controller

General Description

The DS3994 is a 4-channel controller for cold-cathode

fluorescent lamps (CCFLs) that backlight liquid crystal

displays (LCDs) in TV and PC monitor applications. The

DS3994’s features make it suitable for use in even the

largest LCDs, while its low BOM cost makes it ideal for

the entire range of LCD TVs and monitors.

The DS3994 can stagger the lamp bursts from each of

the four channels. This feature allows scanning back-

light schemes for video quality improvement to be

implemented using a single CCFL controller IC, making

it very simple and inexpensive to provide this enhance-

ment. In addition, staggering the bursts from each

channel can be used to minimize current ripple on the

display power supply, which is especially important for

larger LCDs. The relative stagger between each of the

channels is programmable, so this feature can be tai-

lored to the specific application.

The DS3994 uses a push-pull drive architecture but it

can also support full and half bridge drive schemes.

Contact the factory for more details.

Features

♦

High-Density CCFL Controller for LCD TV and

PC Monitor Backlights

♦

Programmable Staggered Start for Burst Dimming

on Each Channel

♦

Strike Frequency Boost Option

♦

Programmable Strike Time

♦

Can Be Easily Cascaded

♦

Minimal External Components

♦

Analog Brightness Control

♦

Gate Driver Phasing Minimizes DC Supply Current

Surges

♦

Per-Channel Lamp Fault Monitoring for Lamp

Open, Lamp Overcurrent, Failure to Strike, and

Overvoltage Conditions

♦

Accurate (±2%) On-Board Oscillator Lamp

Frequency (20kHz to 80kHz)

♦

Wide Range On-Board DPWM Burst-Dimming

Oscillator (22.5Hz to 440Hz)

♦

Can Be Synchronized to External Sources for the

Lamp and DPWM Frequencies

♦

< 10% to 100% Dimming Range

♦

Soft-Start Minimizes Audible Transformer Noise

♦

C-Compatible Serial Port and On-Board

Nonvolatile (NV) Memory Allow Device

Customization

♦

3-Byte NV User Memory for Storage of Serial

Numbers and Date Codes

♦

4.5V to 5.5V Single-Supply Operation

♦

-40°C to +85°C Temperature Range

♦

28-Pin SO (300 mils) Package

DS3994

Applications

LCD Televisions

LCD PC Monitors

Pin Configurations

TOP VIEW

LOSC 1

A0 2

PSYNC 3

POSC 4

BRIGHT 5

SVM 6

GA1 7

GB1 8

LCM1 9

OVD1 10

GA2 11

GB2 12

LCM2 13

OVD2 14

28 LSYNC

27 FAULT

26 SCL

25 SDA

24 OVD4

Ordering Information

PART

DS3994Z+

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

28 SO-300

DS3994

23 LCM4

22 GB4

21 GA4

20 OVD3

19 LCM3

18 GB3

17 GA3

16 V

15 GND

+Denotes

a lead-free package.

Typical Operating Circuits appear at end of data sheet.

SO-300

______________________________________________

Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

DS3994Z+ Related Products

	DS3994Z+	DS3994Z-W
Description	Display Drivers & Controllers 4-Ch CCFL Controller	Display Drivers & Controllers 4-Ch CCFL Controller

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