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DS3992

Two-Channel, Push-Pull CCFL Controller

Provides Superior Lamp Current Balance Compared to Single-Channel Solutions

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The DS3992 is a low-cost, two-channel controller for cold-cathode fluorescent lamps (CCFLs) that are used to backlight liquid crystal displays (LCDs). The DS3992 can drive multiple CCFLs per channel, making it ideal for 4- and 6-lamp LCD PC monitor and TV applications.

The DS3992 uses a push-pull drive scheme to convert a DC voltage (5V to 24V) to the high voltage (300V_RMS to 1400V_RMS) AC waveform that is required to power the CCFLs. The push-pull drive scheme uses a minimal number of external components, which reduces component and assembly cost and makes the printed circuit board (PC board) design easy to implement. The push-pull drive scheme also provides an efficient DC-to-AC conversion and produces near-sinusoidal waveforms.

Data Sheet

Download	Rev 0	(PDF, 232kB)
E-Mail

Key Features

Two-Channel CCFL Controller for Backlighting LCD Panels for PC Monitors and LCD-TVs
Minimal BOM Provides Low-Cost Inverter Solution
Per-Channel Lamp Fault Monitoring for Lamp-Open, Lamp Overcurrent, Failure to Strike, and Overvoltage Conditions
Accurate (±10%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz)
Accurate (±10%) On-Board Oscillator for DPWM Burst-Dimming Frequency (90Hz to 220Hz or 180Hz to 440Hz)
Device Supply Undervoltage Lockout
Inverter Supply Undervoltage Lockout
Burst-Dimming Soft-Start Minimizes Audible Transformer Noise
Strike Frequency Boost
100% to < 10% Dimming Range
4.5V to 5.5V Single-Supply Operation
-40°C to +85°C Temperature Range
16-Pin SO Package (150 mils)

Applications/Uses

LCD PC Monitors
LCD-TVs

Key Specifications:

CCFL Controllers

Part Number

V_IN
(V)

Topology

Channels

Dimming Interface

Freq.

EV Kit

Package/Pins

Smallest Available Pckg.
(mm²)

Oper. Temp.
(°C)

min

max

max w/pins

DS3992

4.5

5.5

Push-Pull

Analog

DPWM

Fixed PWM

SOIC(N)/16

61.9

-40 to +85

See All CCFL Controllers (14)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

Application Notes

Application Note 3835		CCFL Push-Pull Snubber Circuit
Application Note 4135		Implementing Analog Dimming on the DS39xx CCFL Controllers
Application Note 4190		Enhancing the Gate-Drive Capacity of the DS39xx CCFL Controllers
Application Note 4637		Determining LCM and OVD Thresholds for the DS3xxx CCFL Controllers

Product Guides

Displays (PDF)

Reliability Reports

Reliability Report:

DS3992.pdf

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS3992Z-09N+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09N+T&R			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09P+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09P+T&R			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09P+W			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18N+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18N+T&R			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18P+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18P+T&R			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

Notes:

Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Similar Products by Function

DS3984	4-Channel Cold-Cathode Fluorescent Lamp Controller
DS3988	8-Channel Cold-Cathode Fluorescent Lamp Controller
See All CCFL Controllers (18 Products)

Similar Products by Application

Displays: LCD > CCFL Inverters with Analog Dimming Interface

More Information

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[ 2006-12-20 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 0; 2006-10-19
This page last modified: 2007-02-22