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)
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.
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