DS3991

Low-Cost CCFL Controller

Full-Featured Single-Channel CCFL Controller

Data Sheet (Rev. 1)

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Part Details

CCFL Controller for Backlighting LCD Panels
Minimal External Components Required
Lamp Fault Monitoring for Lamp-Open, Lamp-Overcurrent, Failure-to-Strike, and Overvoltage Conditions
Accurate (±5%) On-Board Oscillator for Lamp Frequency (40kHz to 80kHz)
Accurate (±5%) On-Board Oscillator for DPWM 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
Strike Frequency Boost
100% to < 10% Dimming Range
Low Cost
Single-Supply Operation Range: 4.5V to 5.5V
Temperature Range: -40°C to +85°C
16-Pin SO Package (150 mils)

Documentation

Data Sheet 1

DS3991: Low-Cost CCFL Controller Data Sheet (Rev.1) 02/19/2008

Reliability Data 1

DS3991 Reliability Data 01/12/2023

Design Note 2

Enhancing the Gate-Drive Capacity of the DS39xx CCFL Controllers 03/26/2008

Implementing Analog Dimming on the DS39xx CCFL Controllers 12/14/2007

This is the most up-to-date revision of the Data Sheet.

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