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Data Sheet

FULL DATA SHEET (PDF, 232kB) Download   E-Mail

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 (300VRMS to 1400VRMS) 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.

Key Features		Applications/Uses
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)		LCD PC Monitors LCD-TVs

Diagram

Typical Operating Circuit

Application Notes

Application Note 3375: DS3984 / DS3988 Transformer Turns Ratio Selection - DS3992 Application Note 3835: CCFL Push-Pull Snubber Circuit - DS3992 Application Note 4135: Implementing Analog Dimming on the DS39xx CCFL Controllers - DS3992 Application Note 4190: Enhancing the Gate-Drive Capacity of the DS39xx CCFL Controllers - DS3992

Evaluation Kits

none

Design Guides

DISPLAYS (PDF) FLAT-PANEL DISPLAY (PDF)

Reliability Reports

Reliability Report: DS3992.pdf

Software/Models

none

Ordering Information
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. More: SeeFull Data Sheet or Part 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.
Devices: 1-8 of 8
DS3992	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS3992Z-09N+T&R			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09P+T&R			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18N+T&R			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18P+T&R			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09N+			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-09P+			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18N+			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS3992Z-18P+			SOIC;16 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2006-12-20  Product Ad: Download

Related Products

DS3988 8-Channel Cold-Cathode Fluorescent Lamp Controller DS3984 4-Channel Cold-Cathode Fluorescent Lamp Controller

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Description   Key Features   Applications/Uses   Key Specifications   Diagram

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